./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:17:55,868 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:17:55,938 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:17:55,942 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:17:55,942 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:17:55,959 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:17:55,960 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:17:55,961 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:17:55,961 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:17:55,961 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:17:55,962 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:17:55,962 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:17:55,963 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:17:55,963 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:17:55,963 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:17:55,963 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:17:55,964 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:17:55,964 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:17:55,964 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:17:55,965 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:17:55,965 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:17:55,969 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:17:55,969 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:17:55,969 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:17:55,970 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:17:55,970 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:17:55,970 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:17:55,971 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:17:55,971 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:17:55,971 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:17:55,974 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:17:55,975 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:17:55,975 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:17:55,975 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:17:55,976 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:17:55,976 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:17:55,976 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:17:55,976 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:17:55,976 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:17:55,976 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:17:55,977 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:17:55,978 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:17:55,978 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 [2024-11-10 18:17:56,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:17:56,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:17:56,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:17:56,342 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:17:56,343 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:17:56,344 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-11-10 18:17:58,001 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:17:58,216 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:17:58,218 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-11-10 18:17:58,228 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/116109030/167c80fa26c3413093224d25ecfb6f58/FLAG3658eb830 [2024-11-10 18:17:58,244 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/116109030/167c80fa26c3413093224d25ecfb6f58 [2024-11-10 18:17:58,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:17:58,249 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:17:58,251 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:17:58,251 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:17:58,257 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:17:58,257 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:17:58" (1/1) ... [2024-11-10 18:17:58,258 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@438bf1c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:58, skipping insertion in model container [2024-11-10 18:17:58,259 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:17:58" (1/1) ... [2024-11-10 18:17:58,282 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:17:58,560 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:17:58,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:17:58,580 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:17:58,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:17:58,637 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:17:58,637 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:58 WrapperNode [2024-11-10 18:17:58,638 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:17:58,639 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:17:58,640 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:17:58,640 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:17:58,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:58" (1/1) ... [2024-11-10 18:17:58,658 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:58" (1/1) ... [2024-11-10 18:17:58,694 INFO L138 Inliner]: procedures = 21, calls = 22, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 134 [2024-11-10 18:17:58,697 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:17:58,698 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:17:58,698 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:17:58,698 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:17:58,708 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:58" (1/1) ... [2024-11-10 18:17:58,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:58" (1/1) ... [2024-11-10 18:17:58,710 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:58" (1/1) ... [2024-11-10 18:17:58,738 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-10 18:17:58,739 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:58" (1/1) ... [2024-11-10 18:17:58,739 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:58" (1/1) ... [2024-11-10 18:17:58,745 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:58" (1/1) ... [2024-11-10 18:17:58,749 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:58" (1/1) ... [2024-11-10 18:17:58,753 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:58" (1/1) ... [2024-11-10 18:17:58,754 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:58" (1/1) ... [2024-11-10 18:17:58,760 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:17:58,761 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:17:58,762 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:17:58,762 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:17:58,765 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:58" (1/1) ... [2024-11-10 18:17:58,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:17:58,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:58,811 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 18:17:58,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 18:17:58,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:17:58,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:17:58,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:17:58,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:17:58,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:17:58,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:17:58,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:17:58,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:17:58,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:17:58,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:17:58,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:17:58,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:17:58,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:17:58,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:17:58,930 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:17:59,076 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:17:59,079 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:17:59,326 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:17:59,326 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:17:59,480 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:17:59,481 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:17:59,481 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:17:59 BoogieIcfgContainer [2024-11-10 18:17:59,481 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:17:59,484 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:17:59,484 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:17:59,487 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:17:59,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:17:58" (1/3) ... [2024-11-10 18:17:59,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d8db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:17:59, skipping insertion in model container [2024-11-10 18:17:59,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:58" (2/3) ... [2024-11-10 18:17:59,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d8db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:17:59, skipping insertion in model container [2024-11-10 18:17:59,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:17:59" (3/3) ... [2024-11-10 18:17:59,489 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2024-11-10 18:17:59,503 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:17:59,504 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-10 18:17:59,504 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:17:59,578 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 18:17:59,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 56 transitions, 126 flow [2024-11-10 18:17:59,663 INFO L124 PetriNetUnfolderBase]: 7/54 cut-off events. [2024-11-10 18:17:59,664 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 18:17:59,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 54 events. 7/54 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 105 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-11-10 18:17:59,667 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 56 transitions, 126 flow [2024-11-10 18:17:59,671 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 53 transitions, 118 flow [2024-11-10 18:17:59,685 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:17:59,693 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;@feeb27d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:17:59,696 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-11-10 18:17:59,701 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:17:59,704 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2024-11-10 18:17:59,704 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:17:59,705 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:59,706 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:59,706 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:17:59,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:59,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1516166918, now seen corresponding path program 1 times [2024-11-10 18:17:59,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:59,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543200619] [2024-11-10 18:17:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:59,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:00,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:00,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543200619] [2024-11-10 18:18:00,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543200619] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:18:00,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:18:00,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:18:00,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084610554] [2024-11-10 18:18:00,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:00,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:18:00,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:00,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:18:00,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:18:00,292 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-10 18:18:00,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:00,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:00,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-10 18:18:00,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:00,524 INFO L124 PetriNetUnfolderBase]: 237/491 cut-off events. [2024-11-10 18:18:00,524 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-10 18:18:00,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 491 events. 237/491 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2507 event pairs, 167 based on Foata normal form. 44/483 useless extension candidates. Maximal degree in co-relation 797. Up to 358 conditions per place. [2024-11-10 18:18:00,537 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 26 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-11-10 18:18:00,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 47 transitions, 162 flow [2024-11-10 18:18:00,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:18:00,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:18:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-11-10 18:18:00,552 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-11-10 18:18:00,554 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 118 flow. Second operand 3 states and 99 transitions. [2024-11-10 18:18:00,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 47 transitions, 162 flow [2024-11-10 18:18:00,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 154 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:18:00,562 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 102 flow [2024-11-10 18:18:00,566 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2024-11-10 18:18:00,572 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -5 predicate places. [2024-11-10 18:18:00,573 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 102 flow [2024-11-10 18:18:00,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:00,573 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:00,574 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:00,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:18:00,575 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:18:00,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:00,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1516166917, now seen corresponding path program 1 times [2024-11-10 18:18:00,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:00,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214413931] [2024-11-10 18:18:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:00,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:00,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:00,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214413931] [2024-11-10 18:18:00,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214413931] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:18:00,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:18:00,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:18:00,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703735082] [2024-11-10 18:18:00,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:00,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:18:00,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:00,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:18:00,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:18:00,919 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-10 18:18:00,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:00,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:00,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-10 18:18:00,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:01,184 INFO L124 PetriNetUnfolderBase]: 238/496 cut-off events. [2024-11-10 18:18:01,185 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-10 18:18:01,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 496 events. 238/496 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2513 event pairs, 167 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 840. Up to 363 conditions per place. [2024-11-10 18:18:01,194 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 28 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-10 18:18:01,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 50 transitions, 174 flow [2024-11-10 18:18:01,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:18:01,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:18:01,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-11-10 18:18:01,198 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5401785714285714 [2024-11-10 18:18:01,199 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 102 flow. Second operand 4 states and 121 transitions. [2024-11-10 18:18:01,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 50 transitions, 174 flow [2024-11-10 18:18:01,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:18:01,207 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 125 flow [2024-11-10 18:18:01,208 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-11-10 18:18:01,209 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -2 predicate places. [2024-11-10 18:18:01,209 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 125 flow [2024-11-10 18:18:01,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:01,210 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:01,210 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:01,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:18:01,211 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:18:01,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:01,211 INFO L85 PathProgramCache]: Analyzing trace with hash 2042785348, now seen corresponding path program 1 times [2024-11-10 18:18:01,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:01,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150023960] [2024-11-10 18:18:01,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:01,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:01,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:01,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150023960] [2024-11-10 18:18:01,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150023960] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:01,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136103871] [2024-11-10 18:18:01,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:01,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:01,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:01,464 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:01,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:18:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:01,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-10 18:18:01,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:01,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:18:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:01,772 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:18:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:01,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136103871] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:18:01,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:18:01,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-10 18:18:01,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111703461] [2024-11-10 18:18:01,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:18:01,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:18:01,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:01,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:18:01,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:18:02,053 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 56 [2024-11-10 18:18:02,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 125 flow. Second operand has 11 states, 11 states have (on average 22.636363636363637) internal successors, (249), 11 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:02,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:02,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 56 [2024-11-10 18:18:02,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:02,266 INFO L124 PetriNetUnfolderBase]: 238/495 cut-off events. [2024-11-10 18:18:02,267 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-10 18:18:02,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 495 events. 238/495 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2508 event pairs, 167 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 857. Up to 359 conditions per place. [2024-11-10 18:18:02,272 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 26 selfloop transitions, 7 changer transitions 0/50 dead transitions. [2024-11-10 18:18:02,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 50 transitions, 189 flow [2024-11-10 18:18:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:18:02,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:18:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-11-10 18:18:02,275 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-11-10 18:18:02,275 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 125 flow. Second operand 6 states and 160 transitions. [2024-11-10 18:18:02,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 50 transitions, 189 flow [2024-11-10 18:18:02,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 50 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:18:02,277 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 132 flow [2024-11-10 18:18:02,278 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=132, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-11-10 18:18:02,282 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2024-11-10 18:18:02,283 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 132 flow [2024-11-10 18:18:02,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.636363636363637) internal successors, (249), 11 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:02,284 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:02,284 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:02,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:18:02,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:02,486 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:18:02,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:02,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1013860881, now seen corresponding path program 1 times [2024-11-10 18:18:02,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:02,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003823913] [2024-11-10 18:18:02,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:02,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:02,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:02,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003823913] [2024-11-10 18:18:02,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003823913] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:18:02,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:18:02,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:18:02,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247395660] [2024-11-10 18:18:02,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:02,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:18:02,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:02,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:18:02,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:18:02,524 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-10 18:18:02,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:02,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:02,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-10 18:18:02,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:02,620 INFO L124 PetriNetUnfolderBase]: 282/639 cut-off events. [2024-11-10 18:18:02,620 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-10 18:18:02,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1142 conditions, 639 events. 282/639 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3243 event pairs, 114 based on Foata normal form. 0/526 useless extension candidates. Maximal degree in co-relation 1114. Up to 298 conditions per place. [2024-11-10 18:18:02,624 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 40 selfloop transitions, 6 changer transitions 0/63 dead transitions. [2024-11-10 18:18:02,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 63 transitions, 254 flow [2024-11-10 18:18:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:18:02,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:18:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2024-11-10 18:18:02,626 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2024-11-10 18:18:02,626 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 132 flow. Second operand 3 states and 110 transitions. [2024-11-10 18:18:02,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 63 transitions, 254 flow [2024-11-10 18:18:02,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 63 transitions, 231 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-10 18:18:02,629 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 147 flow [2024-11-10 18:18:02,629 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2024-11-10 18:18:02,630 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2024-11-10 18:18:02,630 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 147 flow [2024-11-10 18:18:02,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:02,630 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:02,630 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:02,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:18:02,631 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:18:02,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:02,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1391552756, now seen corresponding path program 1 times [2024-11-10 18:18:02,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:02,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968844670] [2024-11-10 18:18:02,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:02,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:02,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:02,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968844670] [2024-11-10 18:18:02,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968844670] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:18:02,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:18:02,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:18:02,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420117793] [2024-11-10 18:18:02,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:02,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:18:02,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:02,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:18:02,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:18:02,719 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2024-11-10 18:18:02,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:02,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:02,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2024-11-10 18:18:02,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:02,805 INFO L124 PetriNetUnfolderBase]: 262/560 cut-off events. [2024-11-10 18:18:02,805 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-11-10 18:18:02,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1156 conditions, 560 events. 262/560 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2658 event pairs, 168 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 380. Up to 425 conditions per place. [2024-11-10 18:18:02,809 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 30 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2024-11-10 18:18:02,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 207 flow [2024-11-10 18:18:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:18:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:18:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-11-10 18:18:02,811 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47767857142857145 [2024-11-10 18:18:02,811 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 147 flow. Second operand 4 states and 107 transitions. [2024-11-10 18:18:02,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 207 flow [2024-11-10 18:18:02,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 195 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:18:02,838 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 135 flow [2024-11-10 18:18:02,838 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-11-10 18:18:02,839 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -3 predicate places. [2024-11-10 18:18:02,839 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 135 flow [2024-11-10 18:18:02,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:02,839 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:02,840 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:02,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 18:18:02,840 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:18:02,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:02,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1391552755, now seen corresponding path program 1 times [2024-11-10 18:18:02,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:02,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002442098] [2024-11-10 18:18:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:02,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:02,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:02,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002442098] [2024-11-10 18:18:02,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002442098] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:18:02,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:18:02,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:18:02,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854354518] [2024-11-10 18:18:02,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:02,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:18:02,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:02,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:18:02,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:18:02,904 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-10 18:18:02,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:02,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:02,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-10 18:18:02,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:03,014 INFO L124 PetriNetUnfolderBase]: 284/618 cut-off events. [2024-11-10 18:18:03,015 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-10 18:18:03,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1232 conditions, 618 events. 284/618 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2982 event pairs, 191 based on Foata normal form. 0/577 useless extension candidates. Maximal degree in co-relation 1076. Up to 429 conditions per place. [2024-11-10 18:18:03,018 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 42 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2024-11-10 18:18:03,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 259 flow [2024-11-10 18:18:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:18:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:18:03,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-11-10 18:18:03,020 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-11-10 18:18:03,020 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 135 flow. Second operand 5 states and 156 transitions. [2024-11-10 18:18:03,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 259 flow [2024-11-10 18:18:03,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 255 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:18:03,022 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 153 flow [2024-11-10 18:18:03,022 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=153, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-11-10 18:18:03,023 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2024-11-10 18:18:03,024 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 153 flow [2024-11-10 18:18:03,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:03,024 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:03,024 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:03,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:18:03,024 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:18:03,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:03,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1391031466, now seen corresponding path program 1 times [2024-11-10 18:18:03,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:03,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705246715] [2024-11-10 18:18:03,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:03,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:18:03,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:03,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705246715] [2024-11-10 18:18:03,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705246715] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:18:03,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:18:03,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:18:03,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433557160] [2024-11-10 18:18:03,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:03,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:18:03,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:03,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:18:03,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:18:03,071 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 56 [2024-11-10 18:18:03,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:03,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:03,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 56 [2024-11-10 18:18:03,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:03,177 INFO L124 PetriNetUnfolderBase]: 353/747 cut-off events. [2024-11-10 18:18:03,177 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-11-10 18:18:03,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1519 conditions, 747 events. 353/747 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4016 event pairs, 137 based on Foata normal form. 5/744 useless extension candidates. Maximal degree in co-relation 1366. Up to 481 conditions per place. [2024-11-10 18:18:03,183 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 49 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2024-11-10 18:18:03,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 66 transitions, 295 flow [2024-11-10 18:18:03,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:18:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:18:03,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2024-11-10 18:18:03,184 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2024-11-10 18:18:03,184 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 153 flow. Second operand 3 states and 110 transitions. [2024-11-10 18:18:03,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 66 transitions, 295 flow [2024-11-10 18:18:03,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 66 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:18:03,187 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 160 flow [2024-11-10 18:18:03,187 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-11-10 18:18:03,188 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2024-11-10 18:18:03,188 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 160 flow [2024-11-10 18:18:03,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:03,188 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:03,188 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:03,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 18:18:03,189 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:18:03,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:03,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1391031500, now seen corresponding path program 1 times [2024-11-10 18:18:03,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:03,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741499215] [2024-11-10 18:18:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:03,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:03,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:03,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741499215] [2024-11-10 18:18:03,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741499215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:03,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101058746] [2024-11-10 18:18:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:03,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:03,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:03,390 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:03,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:18:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:03,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-10 18:18:03,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:03,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:18:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:03,597 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:18:03,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101058746] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:18:03,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:18:03,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2024-11-10 18:18:03,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759206865] [2024-11-10 18:18:03,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:03,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:18:03,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:03,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:18:03,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-10 18:18:03,673 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 56 [2024-11-10 18:18:03,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:03,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:03,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 56 [2024-11-10 18:18:03,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:03,871 INFO L124 PetriNetUnfolderBase]: 300/657 cut-off events. [2024-11-10 18:18:03,872 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2024-11-10 18:18:03,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1391 conditions, 657 events. 300/657 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3447 event pairs, 161 based on Foata normal form. 0/646 useless extension candidates. Maximal degree in co-relation 1225. Up to 369 conditions per place. [2024-11-10 18:18:03,877 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 34 selfloop transitions, 8 changer transitions 0/56 dead transitions. [2024-11-10 18:18:03,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 257 flow [2024-11-10 18:18:03,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:18:03,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:18:03,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-11-10 18:18:03,879 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-11-10 18:18:03,879 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 160 flow. Second operand 5 states and 138 transitions. [2024-11-10 18:18:03,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 257 flow [2024-11-10 18:18:03,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 56 transitions, 255 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:18:03,883 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 170 flow [2024-11-10 18:18:03,884 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-11-10 18:18:03,885 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2024-11-10 18:18:03,887 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 170 flow [2024-11-10 18:18:03,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:03,887 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:03,887 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:03,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-10 18:18:04,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-10 18:18:04,092 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:18:04,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:04,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1285586498, now seen corresponding path program 1 times [2024-11-10 18:18:04,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:04,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028572381] [2024-11-10 18:18:04,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:04,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:18:04,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:04,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028572381] [2024-11-10 18:18:04,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028572381] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:18:04,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:18:04,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 18:18:04,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638769129] [2024-11-10 18:18:04,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:04,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:18:04,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:04,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:18:04,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-10 18:18:04,301 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-10 18:18:04,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 170 flow. Second operand has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:04,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:04,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-10 18:18:04,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:04,553 INFO L124 PetriNetUnfolderBase]: 437/931 cut-off events. [2024-11-10 18:18:04,553 INFO L125 PetriNetUnfolderBase]: For 301/301 co-relation queries the response was YES. [2024-11-10 18:18:04,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2088 conditions, 931 events. 437/931 cut-off events. For 301/301 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4799 event pairs, 93 based on Foata normal form. 0/901 useless extension candidates. Maximal degree in co-relation 1922. Up to 254 conditions per place. [2024-11-10 18:18:04,560 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 69 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-11-10 18:18:04,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 476 flow [2024-11-10 18:18:04,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:18:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:18:04,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-11-10 18:18:04,562 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-11-10 18:18:04,562 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 170 flow. Second operand 7 states and 228 transitions. [2024-11-10 18:18:04,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 476 flow [2024-11-10 18:18:04,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 95 transitions, 436 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:18:04,565 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 195 flow [2024-11-10 18:18:04,565 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=195, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2024-11-10 18:18:04,566 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2024-11-10 18:18:04,566 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 195 flow [2024-11-10 18:18:04,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:04,567 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:04,567 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] [2024-11-10 18:18:04,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:18:04,567 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:18:04,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:04,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1423738599, now seen corresponding path program 1 times [2024-11-10 18:18:04,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:04,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771171197] [2024-11-10 18:18:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:04,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:04,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:04,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771171197] [2024-11-10 18:18:04,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771171197] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:18:04,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:18:04,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:18:04,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206723926] [2024-11-10 18:18:04,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:04,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:18:04,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:04,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:18:04,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:18:04,607 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 56 [2024-11-10 18:18:04,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:04,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:04,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 56 [2024-11-10 18:18:04,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:04,728 INFO L124 PetriNetUnfolderBase]: 460/976 cut-off events. [2024-11-10 18:18:04,729 INFO L125 PetriNetUnfolderBase]: For 296/296 co-relation queries the response was YES. [2024-11-10 18:18:04,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2192 conditions, 976 events. 460/976 cut-off events. For 296/296 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5074 event pairs, 236 based on Foata normal form. 4/967 useless extension candidates. Maximal degree in co-relation 2023. Up to 454 conditions per place. [2024-11-10 18:18:04,734 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 47 selfloop transitions, 2 changer transitions 4/68 dead transitions. [2024-11-10 18:18:04,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 68 transitions, 345 flow [2024-11-10 18:18:04,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:18:04,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:18:04,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-11-10 18:18:04,736 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-11-10 18:18:04,736 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 195 flow. Second operand 3 states and 114 transitions. [2024-11-10 18:18:04,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 68 transitions, 345 flow [2024-11-10 18:18:04,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 68 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:18:04,738 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 191 flow [2024-11-10 18:18:04,738 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2024-11-10 18:18:04,739 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2024-11-10 18:18:04,739 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 191 flow [2024-11-10 18:18:04,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:04,739 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:04,740 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:04,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:18:04,740 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:18:04,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:04,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1964473434, now seen corresponding path program 1 times [2024-11-10 18:18:04,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:04,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342434839] [2024-11-10 18:18:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:04,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-10 18:18:04,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:04,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342434839] [2024-11-10 18:18:04,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342434839] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:04,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538317963] [2024-11-10 18:18:04,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:04,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:04,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:04,923 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:04,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:18:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:04,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 18:18:04,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:05,098 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:18:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:05,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538317963] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:18:05,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:18:05,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2024-11-10 18:18:05,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267954908] [2024-11-10 18:18:05,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:18:05,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-10 18:18:05,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:05,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-10 18:18:05,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-11-10 18:18:05,429 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 56 [2024-11-10 18:18:05,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 191 flow. Second operand has 18 states, 18 states have (on average 22.77777777777778) internal successors, (410), 18 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:05,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:05,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 56 [2024-11-10 18:18:05,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:06,107 INFO L124 PetriNetUnfolderBase]: 978/1989 cut-off events. [2024-11-10 18:18:06,108 INFO L125 PetriNetUnfolderBase]: For 658/658 co-relation queries the response was YES. [2024-11-10 18:18:06,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4622 conditions, 1989 events. 978/1989 cut-off events. For 658/658 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11876 event pairs, 506 based on Foata normal form. 18/1998 useless extension candidates. Maximal degree in co-relation 2816. Up to 907 conditions per place. [2024-11-10 18:18:06,119 INFO L140 encePairwiseOnDemand]: 43/56 looper letters, 80 selfloop transitions, 15 changer transitions 29/135 dead transitions. [2024-11-10 18:18:06,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 135 transitions, 702 flow [2024-11-10 18:18:06,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-10 18:18:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-10 18:18:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 392 transitions. [2024-11-10 18:18:06,122 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-10 18:18:06,122 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 191 flow. Second operand 14 states and 392 transitions. [2024-11-10 18:18:06,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 135 transitions, 702 flow [2024-11-10 18:18:06,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 135 transitions, 683 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-10 18:18:06,125 INFO L231 Difference]: Finished difference. Result has 80 places, 59 transitions, 291 flow [2024-11-10 18:18:06,126 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=291, PETRI_PLACES=80, PETRI_TRANSITIONS=59} [2024-11-10 18:18:06,126 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 27 predicate places. [2024-11-10 18:18:06,126 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 59 transitions, 291 flow [2024-11-10 18:18:06,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.77777777777778) internal successors, (410), 18 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:06,127 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:06,127 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:06,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 18:18:06,328 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 [2024-11-10 18:18:06,329 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:18:06,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:06,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1554198385, now seen corresponding path program 2 times [2024-11-10 18:18:06,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:06,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156638535] [2024-11-10 18:18:06,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:06,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-10 18:18:06,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:06,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156638535] [2024-11-10 18:18:06,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156638535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:06,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457140148] [2024-11-10 18:18:06,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:18:06,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:06,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:06,548 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:06,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:18:06,625 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 18:18:06,625 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:18:06,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 18:18:06,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-10 18:18:06,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:18:06,875 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 7 treesize of output 5 [2024-11-10 18:18:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-10 18:18:06,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457140148] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:18:06,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:18:06,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-10 18:18:06,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332688205] [2024-11-10 18:18:06,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:18:06,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 18:18:06,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:06,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 18:18:06,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-10 18:18:07,137 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 56 [2024-11-10 18:18:07,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 59 transitions, 291 flow. Second operand has 15 states, 15 states have (on average 23.333333333333332) internal successors, (350), 15 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:07,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:07,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 56 [2024-11-10 18:18:07,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:07,533 INFO L124 PetriNetUnfolderBase]: 768/1619 cut-off events. [2024-11-10 18:18:07,534 INFO L125 PetriNetUnfolderBase]: For 1059/1059 co-relation queries the response was YES. [2024-11-10 18:18:07,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3981 conditions, 1619 events. 768/1619 cut-off events. For 1059/1059 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 9513 event pairs, 178 based on Foata normal form. 18/1629 useless extension candidates. Maximal degree in co-relation 2703. Up to 688 conditions per place. [2024-11-10 18:18:07,546 INFO L140 encePairwiseOnDemand]: 46/56 looper letters, 46 selfloop transitions, 27 changer transitions 3/87 dead transitions. [2024-11-10 18:18:07,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 557 flow [2024-11-10 18:18:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:18:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:18:07,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-11-10 18:18:07,547 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-11-10 18:18:07,547 INFO L175 Difference]: Start difference. First operand has 80 places, 59 transitions, 291 flow. Second operand 10 states and 255 transitions. [2024-11-10 18:18:07,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 557 flow [2024-11-10 18:18:07,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 87 transitions, 541 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-10 18:18:07,552 INFO L231 Difference]: Finished difference. Result has 83 places, 68 transitions, 389 flow [2024-11-10 18:18:07,552 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=389, PETRI_PLACES=83, PETRI_TRANSITIONS=68} [2024-11-10 18:18:07,554 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 30 predicate places. [2024-11-10 18:18:07,555 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 68 transitions, 389 flow [2024-11-10 18:18:07,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 23.333333333333332) internal successors, (350), 15 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:07,555 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:07,555 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:07,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 18:18:07,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:07,760 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:18:07,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:07,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1850537910, now seen corresponding path program 1 times [2024-11-10 18:18:07,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:07,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026958622] [2024-11-10 18:18:07,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:07,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:08,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:08,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:08,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026958622] [2024-11-10 18:18:08,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026958622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:08,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203249113] [2024-11-10 18:18:08,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:08,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:08,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:08,464 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:08,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 18:18:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:08,606 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-10 18:18:08,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:08,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-10 18:18:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:09,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:18:10,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-11-10 18:18:10,201 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:18:10,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-11-10 18:18:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:10,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203249113] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:18:10,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:18:10,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 30 [2024-11-10 18:18:10,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044741802] [2024-11-10 18:18:10,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:18:10,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-10 18:18:10,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:10,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-10 18:18:10,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2024-11-10 18:18:10,895 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 56 [2024-11-10 18:18:10,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 68 transitions, 389 flow. Second operand has 31 states, 31 states have (on average 23.451612903225808) internal successors, (727), 31 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:10,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:10,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 56 [2024-11-10 18:18:10,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:12,691 INFO L124 PetriNetUnfolderBase]: 1074/2219 cut-off events. [2024-11-10 18:18:12,691 INFO L125 PetriNetUnfolderBase]: For 1940/1940 co-relation queries the response was YES. [2024-11-10 18:18:12,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5855 conditions, 2219 events. 1074/2219 cut-off events. For 1940/1940 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 13176 event pairs, 112 based on Foata normal form. 29/2246 useless extension candidates. Maximal degree in co-relation 4028. Up to 378 conditions per place. [2024-11-10 18:18:12,713 INFO L140 encePairwiseOnDemand]: 38/56 looper letters, 102 selfloop transitions, 47 changer transitions 109/269 dead transitions. [2024-11-10 18:18:12,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 269 transitions, 1667 flow [2024-11-10 18:18:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-10 18:18:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-10 18:18:12,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 844 transitions. [2024-11-10 18:18:12,721 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5197044334975369 [2024-11-10 18:18:12,721 INFO L175 Difference]: Start difference. First operand has 83 places, 68 transitions, 389 flow. Second operand 29 states and 844 transitions. [2024-11-10 18:18:12,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 269 transitions, 1667 flow [2024-11-10 18:18:12,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 269 transitions, 1597 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-11-10 18:18:12,736 INFO L231 Difference]: Finished difference. Result has 122 places, 95 transitions, 686 flow [2024-11-10 18:18:12,737 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=686, PETRI_PLACES=122, PETRI_TRANSITIONS=95} [2024-11-10 18:18:12,738 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 69 predicate places. [2024-11-10 18:18:12,739 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 95 transitions, 686 flow [2024-11-10 18:18:12,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 23.451612903225808) internal successors, (727), 31 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:12,739 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:12,739 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:12,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-10 18:18:12,944 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,SelfDestructingSolverStorable12 [2024-11-10 18:18:12,944 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:18:12,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:12,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1594544259, now seen corresponding path program 2 times [2024-11-10 18:18:12,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:12,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502464617] [2024-11-10 18:18:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:12,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:18:13,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:13,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502464617] [2024-11-10 18:18:13,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502464617] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:13,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795626516] [2024-11-10 18:18:13,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:18:13,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:13,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:13,019 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:13,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 18:18:13,107 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:18:13,108 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:18:13,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 18:18:13,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:13,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:18:13,148 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:18:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:18:13,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795626516] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:18:13,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:18:13,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-11-10 18:18:13,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062428530] [2024-11-10 18:18:13,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:18:13,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:18:13,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:13,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:18:13,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:18:13,202 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-10 18:18:13,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 95 transitions, 686 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:13,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:13,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-10 18:18:13,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:13,535 INFO L124 PetriNetUnfolderBase]: 1372/2697 cut-off events. [2024-11-10 18:18:13,536 INFO L125 PetriNetUnfolderBase]: For 6917/6917 co-relation queries the response was YES. [2024-11-10 18:18:13,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9009 conditions, 2697 events. 1372/2697 cut-off events. For 6917/6917 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 14796 event pairs, 340 based on Foata normal form. 34/2725 useless extension candidates. Maximal degree in co-relation 8959. Up to 1021 conditions per place. [2024-11-10 18:18:13,562 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 126 selfloop transitions, 36 changer transitions 1/175 dead transitions. [2024-11-10 18:18:13,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 175 transitions, 1596 flow [2024-11-10 18:18:13,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:18:13,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:18:13,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 151 transitions. [2024-11-10 18:18:13,564 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6741071428571429 [2024-11-10 18:18:13,564 INFO L175 Difference]: Start difference. First operand has 122 places, 95 transitions, 686 flow. Second operand 4 states and 151 transitions. [2024-11-10 18:18:13,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 175 transitions, 1596 flow [2024-11-10 18:18:13,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 175 transitions, 1445 flow, removed 64 selfloop flow, removed 18 redundant places. [2024-11-10 18:18:13,603 INFO L231 Difference]: Finished difference. Result has 93 places, 123 transitions, 1023 flow [2024-11-10 18:18:13,603 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1023, PETRI_PLACES=93, PETRI_TRANSITIONS=123} [2024-11-10 18:18:13,604 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 40 predicate places. [2024-11-10 18:18:13,604 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 123 transitions, 1023 flow [2024-11-10 18:18:13,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:13,604 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:13,605 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:13,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 18:18:13,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:13,806 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:18:13,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:13,807 INFO L85 PathProgramCache]: Analyzing trace with hash 819699569, now seen corresponding path program 3 times [2024-11-10 18:18:13,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:13,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118298195] [2024-11-10 18:18:13,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:13,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:13,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 18:18:13,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:13,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118298195] [2024-11-10 18:18:13,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118298195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:13,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457060440] [2024-11-10 18:18:13,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:18:13,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:13,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:13,978 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:13,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 18:18:14,134 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-10 18:18:14,134 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:18:14,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-10 18:18:14,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 18:18:14,166 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:18:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 18:18:14,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457060440] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:18:14,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:18:14,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-10 18:18:14,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747062359] [2024-11-10 18:18:14,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:18:14,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:18:14,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:14,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:18:14,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:18:14,213 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 56 [2024-11-10 18:18:14,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 123 transitions, 1023 flow. Second operand has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 6 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:14,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:14,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 56 [2024-11-10 18:18:14,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:14,721 INFO L124 PetriNetUnfolderBase]: 2049/3873 cut-off events. [2024-11-10 18:18:14,722 INFO L125 PetriNetUnfolderBase]: For 8076/8092 co-relation queries the response was YES. [2024-11-10 18:18:14,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12566 conditions, 3873 events. 2049/3873 cut-off events. For 8076/8092 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 21926 event pairs, 442 based on Foata normal form. 193/4062 useless extension candidates. Maximal degree in co-relation 12493. Up to 1846 conditions per place. [2024-11-10 18:18:14,757 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 137 selfloop transitions, 4 changer transitions 0/153 dead transitions. [2024-11-10 18:18:14,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 153 transitions, 1526 flow [2024-11-10 18:18:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:18:14,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:18:14,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-11-10 18:18:14,760 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-10 18:18:14,760 INFO L175 Difference]: Start difference. First operand has 93 places, 123 transitions, 1023 flow. Second operand 4 states and 128 transitions. [2024-11-10 18:18:14,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 153 transitions, 1526 flow [2024-11-10 18:18:14,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 153 transitions, 1518 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-10 18:18:14,783 INFO L231 Difference]: Finished difference. Result has 98 places, 119 transitions, 981 flow [2024-11-10 18:18:14,783 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=981, PETRI_PLACES=98, PETRI_TRANSITIONS=119} [2024-11-10 18:18:14,784 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 45 predicate places. [2024-11-10 18:18:14,785 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 119 transitions, 981 flow [2024-11-10 18:18:14,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 6 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:14,785 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:14,785 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:14,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-10 18:18:14,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:14,990 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:18:14,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:14,991 INFO L85 PathProgramCache]: Analyzing trace with hash 518087903, now seen corresponding path program 1 times [2024-11-10 18:18:14,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:14,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487509919] [2024-11-10 18:18:14,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:14,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:16,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:16,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487509919] [2024-11-10 18:18:16,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487509919] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:16,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795259007] [2024-11-10 18:18:16,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:16,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:16,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:16,166 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:16,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 18:18:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:16,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-10 18:18:16,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:18:16,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:18:17,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:18:17,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-10 18:18:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:18:17,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795259007] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:18:17,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:18:17,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 35 [2024-11-10 18:18:17,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780416652] [2024-11-10 18:18:17,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:18:17,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-10 18:18:17,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:17,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-10 18:18:17,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2024-11-10 18:18:18,644 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 56 [2024-11-10 18:18:18,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 119 transitions, 981 flow. Second operand has 36 states, 36 states have (on average 24.0) internal successors, (864), 36 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:18,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:18,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 56 [2024-11-10 18:18:18,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:40,948 INFO L124 PetriNetUnfolderBase]: 13914/27694 cut-off events. [2024-11-10 18:18:40,948 INFO L125 PetriNetUnfolderBase]: For 63252/63252 co-relation queries the response was YES. [2024-11-10 18:18:41,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91566 conditions, 27694 events. 13914/27694 cut-off events. For 63252/63252 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 231700 event pairs, 2160 based on Foata normal form. 298/27843 useless extension candidates. Maximal degree in co-relation 83722. Up to 4740 conditions per place. [2024-11-10 18:18:41,239 INFO L140 encePairwiseOnDemand]: 38/56 looper letters, 1004 selfloop transitions, 997 changer transitions 403/2416 dead transitions. [2024-11-10 18:18:41,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 2416 transitions, 21016 flow [2024-11-10 18:18:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2024-11-10 18:18:41,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2024-11-10 18:18:41,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 6515 transitions. [2024-11-10 18:18:41,264 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4950607902735562 [2024-11-10 18:18:41,265 INFO L175 Difference]: Start difference. First operand has 98 places, 119 transitions, 981 flow. Second operand 235 states and 6515 transitions. [2024-11-10 18:18:41,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 2416 transitions, 21016 flow [2024-11-10 18:18:41,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 2416 transitions, 21010 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-10 18:18:41,568 INFO L231 Difference]: Finished difference. Result has 444 places, 1134 transitions, 13324 flow [2024-11-10 18:18:41,569 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=235, PETRI_FLOW=13324, PETRI_PLACES=444, PETRI_TRANSITIONS=1134} [2024-11-10 18:18:41,570 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 391 predicate places. [2024-11-10 18:18:41,570 INFO L471 AbstractCegarLoop]: Abstraction has has 444 places, 1134 transitions, 13324 flow [2024-11-10 18:18:41,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 24.0) internal successors, (864), 36 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:41,570 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:41,571 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:41,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-10 18:18:41,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-10 18:18:41,775 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-10 18:18:41,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:41,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1321021719, now seen corresponding path program 2 times [2024-11-10 18:18:41,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:41,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585877496] [2024-11-10 18:18:41,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:41,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:43,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:43,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585877496] [2024-11-10 18:18:43,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585877496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:43,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382406435] [2024-11-10 18:18:43,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:18:43,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:43,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:43,090 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:43,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 18:18:43,177 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:18:43,178 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:18:43,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-10 18:18:43,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:43,927 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-11-10 18:18:43,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 15 [2024-11-10 18:18:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:43,969 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:18:44,649 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-11-10 18:18:44,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 60 [2024-11-10 18:18:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:45,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382406435] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:18:45,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:18:45,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2024-11-10 18:18:45,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444161102] [2024-11-10 18:18:45,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:18:45,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-10 18:18:45,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:45,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-10 18:18:45,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1864, Unknown=0, NotChecked=0, Total=2162 [2024-11-10 18:18:47,405 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 56 [2024-11-10 18:18:47,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 1134 transitions, 13324 flow. Second operand has 47 states, 47 states have (on average 23.340425531914892) internal successors, (1097), 47 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:47,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:47,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 56 [2024-11-10 18:18:47,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:27,227 INFO L124 PetriNetUnfolderBase]: 23454/45806 cut-off events. [2024-11-10 18:19:27,228 INFO L125 PetriNetUnfolderBase]: For 1100912/1100920 co-relation queries the response was YES.