./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:41:56,098 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:41:56,160 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:41:56,164 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:41:56,165 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:41:56,189 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:41:56,189 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:41:56,189 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:41:56,190 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:41:56,190 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:41:56,190 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:41:56,190 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:41:56,191 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:41:56,191 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:41:56,193 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:41:56,193 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:41:56,194 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:41:56,196 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:41:56,196 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:41:56,196 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:41:56,196 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:41:56,197 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:41:56,197 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:41:56,197 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:41:56,197 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:41:56,199 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:41:56,199 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:41:56,199 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:41:56,200 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:41:56,200 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:41:56,200 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:41:56,200 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:41:56,200 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:41:56,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:41:56,201 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:41:56,201 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:41:56,201 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:41:56,201 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:41:56,201 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:41:56,201 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:41:56,201 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:41:56,203 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:41:56,203 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2024-11-22 21:41:56,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:41:56,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:41:56,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:41:56,427 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:41:56,427 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:41:56,428 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-22 21:41:57,882 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:41:58,042 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:41:58,042 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-22 21:41:58,048 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ef8485f7/e48bba040a894eb5b835af7d36132041/FLAGd79580c31 [2024-11-22 21:41:58,450 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ef8485f7/e48bba040a894eb5b835af7d36132041 [2024-11-22 21:41:58,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:41:58,454 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:41:58,458 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:41:58,459 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:41:58,463 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:41:58,464 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:41:58" (1/1) ... [2024-11-22 21:41:58,464 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6223ffdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:58, skipping insertion in model container [2024-11-22 21:41:58,465 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:41:58" (1/1) ... [2024-11-22 21:41:58,485 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:41:58,649 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:41:58,652 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:41:58,659 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:41:58,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:41:58,691 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:41:58,691 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:58 WrapperNode [2024-11-22 21:41:58,692 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:41:58,693 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:41:58,693 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:41:58,693 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:41:58,698 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:58" (1/1) ... [2024-11-22 21:41:58,704 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:58" (1/1) ... [2024-11-22 21:41:58,738 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 193 [2024-11-22 21:41:58,738 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:41:58,739 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:41:58,739 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:41:58,739 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:41:58,755 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:58" (1/1) ... [2024-11-22 21:41:58,756 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:58" (1/1) ... [2024-11-22 21:41:58,762 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:58" (1/1) ... [2024-11-22 21:41:58,806 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-22 21:41:58,813 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:58" (1/1) ... [2024-11-22 21:41:58,813 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:58" (1/1) ... [2024-11-22 21:41:58,821 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:58" (1/1) ... [2024-11-22 21:41:58,833 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:58" (1/1) ... [2024-11-22 21:41:58,836 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:58" (1/1) ... [2024-11-22 21:41:58,867 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:58" (1/1) ... [2024-11-22 21:41:58,873 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:41:58,873 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:41:58,874 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:41:58,874 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:41:58,874 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:58" (1/1) ... [2024-11-22 21:41:58,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:41:58,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:58,903 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) [2024-11-22 21:41:58,905 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 [2024-11-22 21:41:58,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:41:58,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:41:58,940 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:41:58,940 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:41:58,940 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:41:58,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:41:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:41:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:41:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:41:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:41:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:41:58,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:41:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:41:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:41:58,944 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:41:59,037 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:41:59,038 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:41:59,331 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:41:59,332 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:41:59,496 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:41:59,497 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-22 21:41:59,497 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:41:59 BoogieIcfgContainer [2024-11-22 21:41:59,497 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:41:59,499 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:41:59,499 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:41:59,501 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:41:59,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:41:58" (1/3) ... [2024-11-22 21:41:59,502 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ece5652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:41:59, skipping insertion in model container [2024-11-22 21:41:59,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:58" (2/3) ... [2024-11-22 21:41:59,502 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ece5652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:41:59, skipping insertion in model container [2024-11-22 21:41:59,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:41:59" (3/3) ... [2024-11-22 21:41:59,503 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-11-22 21:41:59,516 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:41:59,517 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-22 21:41:59,517 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:41:59,558 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 21:41:59,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 42 transitions, 98 flow [2024-11-22 21:41:59,610 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2024-11-22 21:41:59,610 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 21:41:59,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 40 events. 4/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 80 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-11-22 21:41:59,613 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 42 transitions, 98 flow [2024-11-22 21:41:59,616 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 39 transitions, 90 flow [2024-11-22 21:41:59,625 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:41:59,631 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;@727f3e93, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:41:59,632 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-22 21:41:59,635 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:41:59,635 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:41:59,635 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:41:59,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:59,636 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:41:59,636 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:41:59,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:59,641 INFO L85 PathProgramCache]: Analyzing trace with hash 664973, now seen corresponding path program 1 times [2024-11-22 21:41:59,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:59,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667198708] [2024-11-22 21:41:59,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:41:59,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:41:59,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:59,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667198708] [2024-11-22 21:41:59,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667198708] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:41:59,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:41:59,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:41:59,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331794314] [2024-11-22 21:41:59,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:59,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:41:59,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:00,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:42:00,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:42:00,070 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-22 21:42:00,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:00,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:00,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-22 21:42:00,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:00,158 INFO L124 PetriNetUnfolderBase]: 39/124 cut-off events. [2024-11-22 21:42:00,158 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-22 21:42:00,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 124 events. 39/124 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 488 event pairs, 22 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 168. Up to 68 conditions per place. [2024-11-22 21:42:00,163 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 18 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-11-22 21:42:00,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 122 flow [2024-11-22 21:42:00,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:42:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:42:00,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-22 21:42:00,175 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-22 21:42:00,177 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 90 flow. Second operand 3 states and 77 transitions. [2024-11-22 21:42:00,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 122 flow [2024-11-22 21:42:00,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 114 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:42:00,181 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 78 flow [2024-11-22 21:42:00,183 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-11-22 21:42:00,185 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2024-11-22 21:42:00,186 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 78 flow [2024-11-22 21:42:00,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:00,186 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:00,186 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:42:00,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:42:00,187 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:00,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:00,187 INFO L85 PathProgramCache]: Analyzing trace with hash 664974, now seen corresponding path program 1 times [2024-11-22 21:42:00,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:00,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617884302] [2024-11-22 21:42:00,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:00,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:42:00,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:00,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617884302] [2024-11-22 21:42:00,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617884302] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:42:00,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:42:00,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:42:00,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150617837] [2024-11-22 21:42:00,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:00,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:42:00,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:00,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:42:00,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:42:00,363 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-22 21:42:00,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:00,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:00,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-22 21:42:00,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:00,436 INFO L124 PetriNetUnfolderBase]: 41/130 cut-off events. [2024-11-22 21:42:00,436 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 21:42:00,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 130 events. 41/130 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 507 event pairs, 22 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 185. Up to 77 conditions per place. [2024-11-22 21:42:00,438 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 23 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2024-11-22 21:42:00,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 148 flow [2024-11-22 21:42:00,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:42:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:42:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-11-22 21:42:00,439 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-22 21:42:00,440 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 78 flow. Second operand 3 states and 84 transitions. [2024-11-22 21:42:00,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 148 flow [2024-11-22 21:42:00,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:42:00,441 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 114 flow [2024-11-22 21:42:00,442 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2024-11-22 21:42:00,442 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2024-11-22 21:42:00,442 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 114 flow [2024-11-22 21:42:00,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:00,443 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:00,443 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:42:00,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:42:00,443 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:00,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:00,444 INFO L85 PathProgramCache]: Analyzing trace with hash 639061118, now seen corresponding path program 1 times [2024-11-22 21:42:00,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:00,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368913610] [2024-11-22 21:42:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:00,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:42:00,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:00,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368913610] [2024-11-22 21:42:00,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368913610] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:00,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050336747] [2024-11-22 21:42:00,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:00,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:00,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:00,646 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) [2024-11-22 21:42:00,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:42:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:00,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 21:42:00,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:00,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:42:00,812 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:42:00,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050336747] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:00,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:00,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-22 21:42:00,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481170699] [2024-11-22 21:42:00,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:00,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 21:42:00,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:00,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 21:42:00,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-22 21:42:00,999 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-22 21:42:01,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 114 flow. Second operand has 9 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:01,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:01,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-22 21:42:01,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:01,207 INFO L124 PetriNetUnfolderBase]: 43/144 cut-off events. [2024-11-22 21:42:01,208 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-22 21:42:01,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 144 events. 43/144 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 522 event pairs, 22 based on Foata normal form. 4/118 useless extension candidates. Maximal degree in co-relation 217. Up to 78 conditions per place. [2024-11-22 21:42:01,209 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 28 selfloop transitions, 14 changer transitions 0/55 dead transitions. [2024-11-22 21:42:01,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 55 transitions, 248 flow [2024-11-22 21:42:01,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:42:01,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:42:01,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-11-22 21:42:01,213 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-11-22 21:42:01,213 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 114 flow. Second operand 6 states and 160 transitions. [2024-11-22 21:42:01,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 55 transitions, 248 flow [2024-11-22 21:42:01,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:42:01,216 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 198 flow [2024-11-22 21:42:01,216 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2024-11-22 21:42:01,217 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-11-22 21:42:01,218 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 198 flow [2024-11-22 21:42:01,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:01,218 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:01,219 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-22 21:42:01,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:42:01,422 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 [2024-11-22 21:42:01,423 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:01,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:01,424 INFO L85 PathProgramCache]: Analyzing trace with hash -425273010, now seen corresponding path program 2 times [2024-11-22 21:42:01,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:01,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674246976] [2024-11-22 21:42:01,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:42:01,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:01,442 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:42:01,442 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:42:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:42:01,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:01,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674246976] [2024-11-22 21:42:01,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674246976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:01,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139928429] [2024-11-22 21:42:01,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:42:01,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:01,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:01,602 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) [2024-11-22 21:42:01,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:42:01,658 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:42:01,658 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:42:01,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-22 21:42:01,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:01,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:42:01,822 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:42:02,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139928429] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:02,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:02,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-11-22 21:42:02,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505779354] [2024-11-22 21:42:02,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:02,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-22 21:42:02,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:02,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-22 21:42:02,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2024-11-22 21:42:02,316 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-22 21:42:02,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 198 flow. Second operand has 19 states, 19 states have (on average 19.68421052631579) internal successors, (374), 19 states have internal predecessors, (374), 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) [2024-11-22 21:42:02,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:02,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-22 21:42:02,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:02,545 INFO L124 PetriNetUnfolderBase]: 43/142 cut-off events. [2024-11-22 21:42:02,547 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-22 21:42:02,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 142 events. 43/142 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 508 event pairs, 22 based on Foata normal form. 2/116 useless extension candidates. Maximal degree in co-relation 229. Up to 70 conditions per place. [2024-11-22 21:42:02,548 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 15 selfloop transitions, 25 changer transitions 0/53 dead transitions. [2024-11-22 21:42:02,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 53 transitions, 274 flow [2024-11-22 21:42:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 21:42:02,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-22 21:42:02,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-11-22 21:42:02,552 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5194805194805194 [2024-11-22 21:42:02,552 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 198 flow. Second operand 11 states and 240 transitions. [2024-11-22 21:42:02,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 53 transitions, 274 flow [2024-11-22 21:42:02,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 224 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-11-22 21:42:02,555 INFO L231 Difference]: Finished difference. Result has 47 places, 53 transitions, 198 flow [2024-11-22 21:42:02,555 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=198, PETRI_PLACES=47, PETRI_TRANSITIONS=53} [2024-11-22 21:42:02,556 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-11-22 21:42:02,556 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 53 transitions, 198 flow [2024-11-22 21:42:02,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.68421052631579) internal successors, (374), 19 states have internal predecessors, (374), 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) [2024-11-22 21:42:02,557 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:02,557 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:02,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-22 21:42:02,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-22 21:42:02,762 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:02,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:02,763 INFO L85 PathProgramCache]: Analyzing trace with hash -526774252, now seen corresponding path program 1 times [2024-11-22 21:42:02,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:02,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147083003] [2024-11-22 21:42:02,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:02,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:42:02,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:02,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147083003] [2024-11-22 21:42:02,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147083003] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:02,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244896856] [2024-11-22 21:42:02,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:02,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:02,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:02,871 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) [2024-11-22 21:42:02,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:42:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:02,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:42:02,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:42:02,969 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:42:02,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244896856] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:02,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:02,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-22 21:42:02,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650289556] [2024-11-22 21:42:02,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:02,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:42:02,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:02,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:42:02,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:42:03,011 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-11-22 21:42:03,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 53 transitions, 198 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:42:03,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:03,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-11-22 21:42:03,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:03,083 INFO L124 PetriNetUnfolderBase]: 39/140 cut-off events. [2024-11-22 21:42:03,083 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 21:42:03,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 140 events. 39/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 481 event pairs, 22 based on Foata normal form. 6/118 useless extension candidates. Maximal degree in co-relation 185. Up to 70 conditions per place. [2024-11-22 21:42:03,084 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 24 selfloop transitions, 14 changer transitions 0/51 dead transitions. [2024-11-22 21:42:03,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 258 flow [2024-11-22 21:42:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:42:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:42:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-11-22 21:42:03,085 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-11-22 21:42:03,085 INFO L175 Difference]: Start difference. First operand has 47 places, 53 transitions, 198 flow. Second operand 7 states and 184 transitions. [2024-11-22 21:42:03,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 258 flow [2024-11-22 21:42:03,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 230 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-22 21:42:03,087 INFO L231 Difference]: Finished difference. Result has 49 places, 51 transitions, 200 flow [2024-11-22 21:42:03,087 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=200, PETRI_PLACES=49, PETRI_TRANSITIONS=51} [2024-11-22 21:42:03,088 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-11-22 21:42:03,088 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 51 transitions, 200 flow [2024-11-22 21:42:03,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-22 21:42:03,088 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:03,088 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:03,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-22 21:42:03,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:03,289 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:03,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:03,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1693709676, now seen corresponding path program 2 times [2024-11-22 21:42:03,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:03,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533244028] [2024-11-22 21:42:03,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:42:03,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:03,309 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:42:03,309 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:42:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:03,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:03,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533244028] [2024-11-22 21:42:03,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533244028] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:42:03,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:42:03,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:42:03,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443346459] [2024-11-22 21:42:03,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:03,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:42:03,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:03,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:42:03,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:42:03,424 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-11-22 21:42:03,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2024-11-22 21:42:03,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:03,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-11-22 21:42:03,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:03,501 INFO L124 PetriNetUnfolderBase]: 50/159 cut-off events. [2024-11-22 21:42:03,501 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-22 21:42:03,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 159 events. 50/159 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 570 event pairs, 31 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 227. Up to 86 conditions per place. [2024-11-22 21:42:03,504 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 36 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2024-11-22 21:42:03,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 274 flow [2024-11-22 21:42:03,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:42:03,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:42:03,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-11-22 21:42:03,505 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-22 21:42:03,505 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 200 flow. Second operand 5 states and 98 transitions. [2024-11-22 21:42:03,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 274 flow [2024-11-22 21:42:03,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 49 transitions, 252 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-22 21:42:03,508 INFO L231 Difference]: Finished difference. Result has 46 places, 49 transitions, 180 flow [2024-11-22 21:42:03,508 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=42, 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=5, PETRI_FLOW=180, PETRI_PLACES=46, PETRI_TRANSITIONS=49} [2024-11-22 21:42:03,508 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-11-22 21:42:03,509 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 49 transitions, 180 flow [2024-11-22 21:42:03,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2024-11-22 21:42:03,510 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:03,510 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:03,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 21:42:03,510 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:03,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:03,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1693709675, now seen corresponding path program 1 times [2024-11-22 21:42:03,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:03,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051681087] [2024-11-22 21:42:03,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:03,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-22 21:42:03,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:03,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051681087] [2024-11-22 21:42:03,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051681087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:03,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620631536] [2024-11-22 21:42:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:03,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:03,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:03,901 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) [2024-11-22 21:42:03,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:42:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:03,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-22 21:42:03,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:03,988 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 [2024-11-22 21:42:03,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:04,094 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:42:04,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-22 21:42:04,108 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:42:04,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:42:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:42:04,378 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:42:04,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620631536] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:04,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:42:04,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 21 [2024-11-22 21:42:04,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724217524] [2024-11-22 21:42:04,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:04,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:42:04,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:04,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:42:04,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2024-11-22 21:42:04,906 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-22 21:42:04,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 49 transitions, 180 flow. Second operand has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:04,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:04,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-22 21:42:04,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:05,030 INFO L124 PetriNetUnfolderBase]: 86/233 cut-off events. [2024-11-22 21:42:05,030 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:42:05,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 233 events. 86/233 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 923 event pairs, 31 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 370. Up to 78 conditions per place. [2024-11-22 21:42:05,031 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 45 selfloop transitions, 6 changer transitions 0/60 dead transitions. [2024-11-22 21:42:05,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 60 transitions, 307 flow [2024-11-22 21:42:05,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:42:05,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:42:05,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-11-22 21:42:05,033 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-11-22 21:42:05,033 INFO L175 Difference]: Start difference. First operand has 46 places, 49 transitions, 180 flow. Second operand 6 states and 142 transitions. [2024-11-22 21:42:05,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 60 transitions, 307 flow [2024-11-22 21:42:05,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 302 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:42:05,036 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 200 flow [2024-11-22 21:42:05,037 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2024-11-22 21:42:05,037 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-11-22 21:42:05,038 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 200 flow [2024-11-22 21:42:05,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:05,038 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:05,038 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:05,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:42:05,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:05,243 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:05,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:05,243 INFO L85 PathProgramCache]: Analyzing trace with hash -965391780, now seen corresponding path program 1 times [2024-11-22 21:42:05,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:05,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112509657] [2024-11-22 21:42:05,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:05,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-22 21:42:05,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:05,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112509657] [2024-11-22 21:42:05,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112509657] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:42:05,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:42:05,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:42:05,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526923891] [2024-11-22 21:42:05,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:05,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:42:05,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:05,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:42:05,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:42:05,331 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-11-22 21:42:05,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:05,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:05,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-11-22 21:42:05,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:05,380 INFO L124 PetriNetUnfolderBase]: 73/200 cut-off events. [2024-11-22 21:42:05,380 INFO L125 PetriNetUnfolderBase]: For 62/67 co-relation queries the response was YES. [2024-11-22 21:42:05,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 200 events. 73/200 cut-off events. For 62/67 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 724 event pairs, 57 based on Foata normal form. 7/204 useless extension candidates. Maximal degree in co-relation 365. Up to 132 conditions per place. [2024-11-22 21:42:05,381 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 37 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2024-11-22 21:42:05,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 48 transitions, 274 flow [2024-11-22 21:42:05,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:42:05,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:42:05,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-11-22 21:42:05,382 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-11-22 21:42:05,382 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 200 flow. Second operand 4 states and 83 transitions. [2024-11-22 21:42:05,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 48 transitions, 274 flow [2024-11-22 21:42:05,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 266 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:42:05,383 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 192 flow [2024-11-22 21:42:05,384 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2024-11-22 21:42:05,384 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-11-22 21:42:05,384 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 192 flow [2024-11-22 21:42:05,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:05,385 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:05,385 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:05,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 21:42:05,385 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:05,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:05,385 INFO L85 PathProgramCache]: Analyzing trace with hash -965391779, now seen corresponding path program 1 times [2024-11-22 21:42:05,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:05,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173726146] [2024-11-22 21:42:05,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:05,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-22 21:42:05,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:05,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173726146] [2024-11-22 21:42:05,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173726146] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:05,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575887579] [2024-11-22 21:42:05,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:05,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:05,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:05,584 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) [2024-11-22 21:42:05,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:42:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:05,674 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 21:42:05,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:42:05,797 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:05,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-22 21:42:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:42:05,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575887579] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:05,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:05,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2024-11-22 21:42:05,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464660604] [2024-11-22 21:42:05,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:05,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-22 21:42:05,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:05,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-22 21:42:05,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-11-22 21:42:06,315 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-22 21:42:06,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 192 flow. Second operand has 21 states, 21 states have (on average 20.904761904761905) internal successors, (439), 21 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:06,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:06,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-22 21:42:06,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:06,631 INFO L124 PetriNetUnfolderBase]: 100/275 cut-off events. [2024-11-22 21:42:06,634 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-22 21:42:06,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 275 events. 100/275 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1069 event pairs, 31 based on Foata normal form. 16/275 useless extension candidates. Maximal degree in co-relation 526. Up to 86 conditions per place. [2024-11-22 21:42:06,635 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 14 changer transitions 0/70 dead transitions. [2024-11-22 21:42:06,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 70 transitions, 370 flow [2024-11-22 21:42:06,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:42:06,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:42:06,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-11-22 21:42:06,637 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5976190476190476 [2024-11-22 21:42:06,637 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 192 flow. Second operand 10 states and 251 transitions. [2024-11-22 21:42:06,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 70 transitions, 370 flow [2024-11-22 21:42:06,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 367 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:42:06,638 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 237 flow [2024-11-22 21:42:06,638 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=237, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-11-22 21:42:06,639 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-11-22 21:42:06,639 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 237 flow [2024-11-22 21:42:06,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 20.904761904761905) internal successors, (439), 21 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:06,644 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:06,645 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:06,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-22 21:42:06,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:06,846 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:06,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:06,847 INFO L85 PathProgramCache]: Analyzing trace with hash 114216719, now seen corresponding path program 1 times [2024-11-22 21:42:06,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:06,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703866763] [2024-11-22 21:42:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:06,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-22 21:42:07,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:07,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703866763] [2024-11-22 21:42:07,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703866763] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:07,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858013598] [2024-11-22 21:42:07,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:07,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:07,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:07,134 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) [2024-11-22 21:42:07,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:42:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:07,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 21:42:07,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:42:07,348 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:07,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-22 21:42:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:42:07,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858013598] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:07,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:07,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2024-11-22 21:42:07,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542284816] [2024-11-22 21:42:07,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:07,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-22 21:42:07,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:07,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-22 21:42:07,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-11-22 21:42:07,799 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-22 21:42:07,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 237 flow. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:07,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:07,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-22 21:42:07,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:08,113 INFO L124 PetriNetUnfolderBase]: 257/591 cut-off events. [2024-11-22 21:42:08,117 INFO L125 PetriNetUnfolderBase]: For 532/549 co-relation queries the response was YES. [2024-11-22 21:42:08,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1439 conditions, 591 events. 257/591 cut-off events. For 532/549 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2883 event pairs, 84 based on Foata normal form. 0/568 useless extension candidates. Maximal degree in co-relation 1338. Up to 183 conditions per place. [2024-11-22 21:42:08,120 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 50 selfloop transitions, 15 changer transitions 0/73 dead transitions. [2024-11-22 21:42:08,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 465 flow [2024-11-22 21:42:08,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:42:08,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:42:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-11-22 21:42:08,125 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2024-11-22 21:42:08,125 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 237 flow. Second operand 10 states and 239 transitions. [2024-11-22 21:42:08,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 465 flow [2024-11-22 21:42:08,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 444 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:42:08,127 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 265 flow [2024-11-22 21:42:08,127 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=265, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2024-11-22 21:42:08,128 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-11-22 21:42:08,128 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 265 flow [2024-11-22 21:42:08,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:08,132 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:08,132 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:08,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-22 21:42:08,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:08,333 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:08,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:08,334 INFO L85 PathProgramCache]: Analyzing trace with hash -754248404, now seen corresponding path program 1 times [2024-11-22 21:42:08,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:08,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812325564] [2024-11-22 21:42:08,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:08,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-22 21:42:08,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:08,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812325564] [2024-11-22 21:42:08,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812325564] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:08,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991384111] [2024-11-22 21:42:08,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:08,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:08,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:08,541 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) [2024-11-22 21:42:08,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:42:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:08,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-22 21:42:08,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:08,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:08,668 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-22 21:42:08,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-22 21:42:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:42:08,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:42:09,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991384111] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:09,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:42:09,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 9] total 22 [2024-11-22 21:42:09,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265682494] [2024-11-22 21:42:09,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:09,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:42:09,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:09,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:42:09,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2024-11-22 21:42:09,281 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-22 21:42:09,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 265 flow. Second operand has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:09,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:09,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-22 21:42:09,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:09,415 INFO L124 PetriNetUnfolderBase]: 206/514 cut-off events. [2024-11-22 21:42:09,415 INFO L125 PetriNetUnfolderBase]: For 567/580 co-relation queries the response was YES. [2024-11-22 21:42:09,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1404 conditions, 514 events. 206/514 cut-off events. For 567/580 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2513 event pairs, 128 based on Foata normal form. 17/519 useless extension candidates. Maximal degree in co-relation 1300. Up to 271 conditions per place. [2024-11-22 21:42:09,418 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 47 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2024-11-22 21:42:09,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 62 transitions, 415 flow [2024-11-22 21:42:09,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:42:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:42:09,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-11-22 21:42:09,419 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-11-22 21:42:09,419 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 265 flow. Second operand 6 states and 145 transitions. [2024-11-22 21:42:09,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 62 transitions, 415 flow [2024-11-22 21:42:09,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 62 transitions, 394 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:42:09,421 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 258 flow [2024-11-22 21:42:09,421 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2024-11-22 21:42:09,422 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-11-22 21:42:09,422 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 258 flow [2024-11-22 21:42:09,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:09,422 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:09,422 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:09,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 21:42:09,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:09,623 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:09,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:09,624 INFO L85 PathProgramCache]: Analyzing trace with hash -28541918, now seen corresponding path program 1 times [2024-11-22 21:42:09,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:09,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156562575] [2024-11-22 21:42:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:09,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-22 21:42:09,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:09,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156562575] [2024-11-22 21:42:09,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156562575] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:09,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563634857] [2024-11-22 21:42:09,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:09,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:09,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:09,965 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) [2024-11-22 21:42:09,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:42:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:10,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-22 21:42:10,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:10,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:10,079 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 [2024-11-22 21:42:10,151 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:42:10,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:42:10,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-22 21:42:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:42:10,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:42:10,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563634857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:10,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:10,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2024-11-22 21:42:10,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460081966] [2024-11-22 21:42:10,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:10,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-22 21:42:10,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:10,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-22 21:42:10,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2024-11-22 21:42:11,356 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-11-22 21:42:11,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 258 flow. Second operand has 26 states, 26 states have (on average 18.115384615384617) internal successors, (471), 26 states have internal predecessors, (471), 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) [2024-11-22 21:42:11,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:11,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-11-22 21:42:11,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:11,789 INFO L124 PetriNetUnfolderBase]: 375/874 cut-off events. [2024-11-22 21:42:11,789 INFO L125 PetriNetUnfolderBase]: For 1208/1233 co-relation queries the response was YES. [2024-11-22 21:42:11,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2451 conditions, 874 events. 375/874 cut-off events. For 1208/1233 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4777 event pairs, 75 based on Foata normal form. 48/912 useless extension candidates. Maximal degree in co-relation 2354. Up to 153 conditions per place. [2024-11-22 21:42:11,793 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 79 selfloop transitions, 13 changer transitions 0/100 dead transitions. [2024-11-22 21:42:11,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 100 transitions, 636 flow [2024-11-22 21:42:11,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-22 21:42:11,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-22 21:42:11,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 288 transitions. [2024-11-22 21:42:11,794 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5274725274725275 [2024-11-22 21:42:11,794 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 258 flow. Second operand 13 states and 288 transitions. [2024-11-22 21:42:11,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 100 transitions, 636 flow [2024-11-22 21:42:11,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 100 transitions, 610 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-22 21:42:11,797 INFO L231 Difference]: Finished difference. Result has 73 places, 54 transitions, 305 flow [2024-11-22 21:42:11,797 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=305, PETRI_PLACES=73, PETRI_TRANSITIONS=54} [2024-11-22 21:42:11,797 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-11-22 21:42:11,797 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 54 transitions, 305 flow [2024-11-22 21:42:11,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 18.115384615384617) internal successors, (471), 26 states have internal predecessors, (471), 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) [2024-11-22 21:42:11,798 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:11,798 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:11,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-22 21:42:12,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-22 21:42:12,002 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:12,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:12,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1455373354, now seen corresponding path program 1 times [2024-11-22 21:42:12,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:12,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387471103] [2024-11-22 21:42:12,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:12,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-22 21:42:12,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:12,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387471103] [2024-11-22 21:42:12,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387471103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:12,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136242474] [2024-11-22 21:42:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:12,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:12,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:12,416 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) [2024-11-22 21:42:12,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 21:42:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:12,506 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-22 21:42:12,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:12,513 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 [2024-11-22 21:42:12,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:12,599 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:42:12,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:42:12,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-22 21:42:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:42:12,890 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:42:13,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136242474] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:13,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:13,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2024-11-22 21:42:13,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938555627] [2024-11-22 21:42:13,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:13,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-22 21:42:13,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:13,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-22 21:42:13,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2024-11-22 21:42:13,708 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-11-22 21:42:13,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 54 transitions, 305 flow. Second operand has 26 states, 26 states have (on average 19.23076923076923) internal successors, (500), 26 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:13,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:13,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-11-22 21:42:13,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:14,160 INFO L124 PetriNetUnfolderBase]: 457/1261 cut-off events. [2024-11-22 21:42:14,160 INFO L125 PetriNetUnfolderBase]: For 2138/2180 co-relation queries the response was YES. [2024-11-22 21:42:14,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3633 conditions, 1261 events. 457/1261 cut-off events. For 2138/2180 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8067 event pairs, 138 based on Foata normal form. 81/1324 useless extension candidates. Maximal degree in co-relation 3528. Up to 306 conditions per place. [2024-11-22 21:42:14,166 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 78 selfloop transitions, 12 changer transitions 0/101 dead transitions. [2024-11-22 21:42:14,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 101 transitions, 787 flow [2024-11-22 21:42:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-22 21:42:14,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-22 21:42:14,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 289 transitions. [2024-11-22 21:42:14,167 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5293040293040293 [2024-11-22 21:42:14,167 INFO L175 Difference]: Start difference. First operand has 73 places, 54 transitions, 305 flow. Second operand 13 states and 289 transitions. [2024-11-22 21:42:14,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 101 transitions, 787 flow [2024-11-22 21:42:14,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 101 transitions, 733 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-11-22 21:42:14,170 INFO L231 Difference]: Finished difference. Result has 83 places, 57 transitions, 347 flow [2024-11-22 21:42:14,170 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=347, PETRI_PLACES=83, PETRI_TRANSITIONS=57} [2024-11-22 21:42:14,170 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-11-22 21:42:14,171 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 57 transitions, 347 flow [2024-11-22 21:42:14,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 19.23076923076923) internal successors, (500), 26 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:14,171 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:14,171 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:14,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 21:42:14,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-22 21:42:14,376 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:14,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash -827986563, now seen corresponding path program 1 times [2024-11-22 21:42:14,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:14,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988285750] [2024-11-22 21:42:14,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:14,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-22 21:42:14,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:14,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988285750] [2024-11-22 21:42:14,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988285750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:14,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771310812] [2024-11-22 21:42:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:14,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:14,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:14,692 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:14,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 21:42:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:14,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-22 21:42:14,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:14,782 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 [2024-11-22 21:42:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:42:14,908 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:42:15,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771310812] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:15,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:15,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2024-11-22 21:42:15,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095595957] [2024-11-22 21:42:15,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:15,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-22 21:42:15,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:15,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-22 21:42:15,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2024-11-22 21:42:15,843 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-11-22 21:42:15,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 57 transitions, 347 flow. Second operand has 28 states, 28 states have (on average 18.678571428571427) internal successors, (523), 28 states have internal predecessors, (523), 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) [2024-11-22 21:42:15,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:15,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-11-22 21:42:15,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:16,387 INFO L124 PetriNetUnfolderBase]: 559/1425 cut-off events. [2024-11-22 21:42:16,387 INFO L125 PetriNetUnfolderBase]: For 3224/3246 co-relation queries the response was YES. [2024-11-22 21:42:16,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4475 conditions, 1425 events. 559/1425 cut-off events. For 3224/3246 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8942 event pairs, 119 based on Foata normal form. 72/1473 useless extension candidates. Maximal degree in co-relation 4362. Up to 270 conditions per place. [2024-11-22 21:42:16,394 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 101 selfloop transitions, 17 changer transitions 0/129 dead transitions. [2024-11-22 21:42:16,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 129 transitions, 976 flow [2024-11-22 21:42:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-22 21:42:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-22 21:42:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 316 transitions. [2024-11-22 21:42:16,396 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5787545787545788 [2024-11-22 21:42:16,396 INFO L175 Difference]: Start difference. First operand has 83 places, 57 transitions, 347 flow. Second operand 13 states and 316 transitions. [2024-11-22 21:42:16,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 129 transitions, 976 flow [2024-11-22 21:42:16,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 129 transitions, 951 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-22 21:42:16,404 INFO L231 Difference]: Finished difference. Result has 90 places, 59 transitions, 398 flow [2024-11-22 21:42:16,404 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=398, PETRI_PLACES=90, PETRI_TRANSITIONS=59} [2024-11-22 21:42:16,405 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-11-22 21:42:16,405 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 59 transitions, 398 flow [2024-11-22 21:42:16,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 18.678571428571427) internal successors, (523), 28 states have internal predecessors, (523), 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) [2024-11-22 21:42:16,405 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:16,406 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:16,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-22 21:42:16,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-22 21:42:16,607 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:16,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:16,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1181979473, now seen corresponding path program 1 times [2024-11-22 21:42:16,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:16,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575937254] [2024-11-22 21:42:16,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:16,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:16,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:16,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575937254] [2024-11-22 21:42:16,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575937254] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:42:16,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:42:16,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:42:16,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553777165] [2024-11-22 21:42:16,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:16,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:42:16,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:16,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:42:16,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:42:16,744 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-11-22 21:42:16,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 59 transitions, 398 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:16,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:16,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-11-22 21:42:16,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:16,948 INFO L124 PetriNetUnfolderBase]: 522/1419 cut-off events. [2024-11-22 21:42:16,949 INFO L125 PetriNetUnfolderBase]: For 3509/3547 co-relation queries the response was YES. [2024-11-22 21:42:16,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4598 conditions, 1419 events. 522/1419 cut-off events. For 3509/3547 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9165 event pairs, 380 based on Foata normal form. 2/1385 useless extension candidates. Maximal degree in co-relation 4478. Up to 820 conditions per place. [2024-11-22 21:42:16,957 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 66 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2024-11-22 21:42:16,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 81 transitions, 716 flow [2024-11-22 21:42:16,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:42:16,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:42:16,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-11-22 21:42:16,958 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-11-22 21:42:16,958 INFO L175 Difference]: Start difference. First operand has 90 places, 59 transitions, 398 flow. Second operand 4 states and 114 transitions. [2024-11-22 21:42:16,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 81 transitions, 716 flow [2024-11-22 21:42:16,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 81 transitions, 678 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-22 21:42:16,962 INFO L231 Difference]: Finished difference. Result has 86 places, 60 transitions, 387 flow [2024-11-22 21:42:16,963 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=387, PETRI_PLACES=86, PETRI_TRANSITIONS=60} [2024-11-22 21:42:16,964 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-11-22 21:42:16,964 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 60 transitions, 387 flow [2024-11-22 21:42:16,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:16,964 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:16,964 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:16,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 21:42:16,965 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:16,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:16,965 INFO L85 PathProgramCache]: Analyzing trace with hash 595953299, now seen corresponding path program 2 times [2024-11-22 21:42:16,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:16,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681981752] [2024-11-22 21:42:16,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:42:16,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:16,979 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:42:16,980 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:42:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:17,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:17,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681981752] [2024-11-22 21:42:17,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681981752] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:42:17,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:42:17,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:42:17,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358659309] [2024-11-22 21:42:17,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:17,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:42:17,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:17,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:42:17,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:42:17,044 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-11-22 21:42:17,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 60 transitions, 387 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:17,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:17,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-11-22 21:42:17,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:17,202 INFO L124 PetriNetUnfolderBase]: 519/1402 cut-off events. [2024-11-22 21:42:17,202 INFO L125 PetriNetUnfolderBase]: For 3990/4046 co-relation queries the response was YES. [2024-11-22 21:42:17,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4864 conditions, 1402 events. 519/1402 cut-off events. For 3990/4046 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8947 event pairs, 357 based on Foata normal form. 3/1362 useless extension candidates. Maximal degree in co-relation 4752. Up to 836 conditions per place. [2024-11-22 21:42:17,210 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 68 selfloop transitions, 3 changer transitions 2/85 dead transitions. [2024-11-22 21:42:17,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 85 transitions, 686 flow [2024-11-22 21:42:17,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:42:17,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:42:17,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-11-22 21:42:17,211 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-11-22 21:42:17,211 INFO L175 Difference]: Start difference. First operand has 86 places, 60 transitions, 387 flow. Second operand 4 states and 117 transitions. [2024-11-22 21:42:17,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 85 transitions, 686 flow [2024-11-22 21:42:17,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 85 transitions, 676 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:42:17,216 INFO L231 Difference]: Finished difference. Result has 89 places, 61 transitions, 399 flow [2024-11-22 21:42:17,216 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=399, PETRI_PLACES=89, PETRI_TRANSITIONS=61} [2024-11-22 21:42:17,217 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-11-22 21:42:17,217 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 61 transitions, 399 flow [2024-11-22 21:42:17,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:17,218 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:17,218 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:17,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-22 21:42:17,218 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:17,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:17,218 INFO L85 PathProgramCache]: Analyzing trace with hash 324294235, now seen corresponding path program 3 times [2024-11-22 21:42:17,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:17,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772411623] [2024-11-22 21:42:17,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:42:17,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:17,238 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-22 21:42:17,238 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:42:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:17,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:17,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772411623] [2024-11-22 21:42:17,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772411623] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:42:17,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:42:17,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:42:17,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069714380] [2024-11-22 21:42:17,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:17,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:42:17,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:17,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:42:17,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:42:17,322 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-22 21:42:17,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 61 transitions, 399 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) [2024-11-22 21:42:17,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:17,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-22 21:42:17,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:17,518 INFO L124 PetriNetUnfolderBase]: 786/1815 cut-off events. [2024-11-22 21:42:17,519 INFO L125 PetriNetUnfolderBase]: For 5715/5773 co-relation queries the response was YES. [2024-11-22 21:42:17,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6575 conditions, 1815 events. 786/1815 cut-off events. For 5715/5773 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11360 event pairs, 552 based on Foata normal form. 30/1833 useless extension candidates. Maximal degree in co-relation 6461. Up to 1128 conditions per place. [2024-11-22 21:42:17,529 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 72 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2024-11-22 21:42:17,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 87 transitions, 764 flow [2024-11-22 21:42:17,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:42:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:42:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-11-22 21:42:17,531 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-11-22 21:42:17,531 INFO L175 Difference]: Start difference. First operand has 89 places, 61 transitions, 399 flow. Second operand 4 states and 114 transitions. [2024-11-22 21:42:17,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 87 transitions, 764 flow [2024-11-22 21:42:17,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 87 transitions, 752 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:42:17,537 INFO L231 Difference]: Finished difference. Result has 92 places, 63 transitions, 430 flow [2024-11-22 21:42:17,537 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=430, PETRI_PLACES=92, PETRI_TRANSITIONS=63} [2024-11-22 21:42:17,538 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-11-22 21:42:17,538 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 63 transitions, 430 flow [2024-11-22 21:42:17,538 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) [2024-11-22 21:42:17,538 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:17,538 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:17,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-22 21:42:17,538 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:17,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:17,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2028777029, now seen corresponding path program 4 times [2024-11-22 21:42:17,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:17,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821463471] [2024-11-22 21:42:17,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:42:17,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:17,561 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:42:17,565 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:42:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:17,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:17,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821463471] [2024-11-22 21:42:17,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821463471] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:42:17,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:42:17,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:42:17,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399639166] [2024-11-22 21:42:17,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:17,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:42:17,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:17,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:42:17,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:42:17,670 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-11-22 21:42:17,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 63 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:17,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:17,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-11-22 21:42:17,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:17,834 INFO L124 PetriNetUnfolderBase]: 543/1512 cut-off events. [2024-11-22 21:42:17,834 INFO L125 PetriNetUnfolderBase]: For 5783/5808 co-relation queries the response was YES. [2024-11-22 21:42:17,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5785 conditions, 1512 events. 543/1512 cut-off events. For 5783/5808 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 10204 event pairs, 18 based on Foata normal form. 30/1528 useless extension candidates. Maximal degree in co-relation 5669. Up to 914 conditions per place. [2024-11-22 21:42:17,845 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 64 selfloop transitions, 6 changer transitions 1/84 dead transitions. [2024-11-22 21:42:17,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 84 transitions, 745 flow [2024-11-22 21:42:17,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:42:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:42:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-11-22 21:42:17,846 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-22 21:42:17,846 INFO L175 Difference]: Start difference. First operand has 92 places, 63 transitions, 430 flow. Second operand 4 states and 112 transitions. [2024-11-22 21:42:17,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 84 transitions, 745 flow [2024-11-22 21:42:17,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 84 transitions, 738 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-22 21:42:17,853 INFO L231 Difference]: Finished difference. Result has 96 places, 64 transitions, 467 flow [2024-11-22 21:42:17,853 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=467, PETRI_PLACES=96, PETRI_TRANSITIONS=64} [2024-11-22 21:42:17,853 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-11-22 21:42:17,854 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 64 transitions, 467 flow [2024-11-22 21:42:17,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:17,854 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:17,854 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:17,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-22 21:42:17,854 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:17,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:17,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1545523249, now seen corresponding path program 1 times [2024-11-22 21:42:17,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:17,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563678673] [2024-11-22 21:42:17,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:17,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-22 21:42:18,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:18,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563678673] [2024-11-22 21:42:18,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563678673] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:18,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575277133] [2024-11-22 21:42:18,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:18,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:18,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:18,064 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:18,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 21:42:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:18,152 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-22 21:42:18,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:42:18,305 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:18,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-22 21:42:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:42:18,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575277133] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:18,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:18,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2024-11-22 21:42:18,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218836273] [2024-11-22 21:42:18,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:18,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-22 21:42:18,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:18,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-22 21:42:18,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2024-11-22 21:42:19,144 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-22 21:42:19,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 64 transitions, 467 flow. Second operand has 28 states, 28 states have (on average 20.107142857142858) internal successors, (563), 28 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:19,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:19,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-22 21:42:19,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:19,767 INFO L124 PetriNetUnfolderBase]: 946/2094 cut-off events. [2024-11-22 21:42:19,768 INFO L125 PetriNetUnfolderBase]: For 8809/8867 co-relation queries the response was YES. [2024-11-22 21:42:19,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8192 conditions, 2094 events. 946/2094 cut-off events. For 8809/8867 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 12820 event pairs, 170 based on Foata normal form. 96/2162 useless extension candidates. Maximal degree in co-relation 8073. Up to 344 conditions per place. [2024-11-22 21:42:19,782 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 105 selfloop transitions, 20 changer transitions 0/135 dead transitions. [2024-11-22 21:42:19,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 135 transitions, 1280 flow [2024-11-22 21:42:19,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-22 21:42:19,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-22 21:42:19,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 321 transitions. [2024-11-22 21:42:19,783 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5879120879120879 [2024-11-22 21:42:19,783 INFO L175 Difference]: Start difference. First operand has 96 places, 64 transitions, 467 flow. Second operand 13 states and 321 transitions. [2024-11-22 21:42:19,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 135 transitions, 1280 flow [2024-11-22 21:42:19,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 135 transitions, 1261 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-22 21:42:19,793 INFO L231 Difference]: Finished difference. Result has 107 places, 65 transitions, 519 flow [2024-11-22 21:42:19,793 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=519, PETRI_PLACES=107, PETRI_TRANSITIONS=65} [2024-11-22 21:42:19,793 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-11-22 21:42:19,793 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 65 transitions, 519 flow [2024-11-22 21:42:19,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 20.107142857142858) internal successors, (563), 28 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:19,794 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:19,794 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:19,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-22 21:42:19,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:19,998 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:19,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:19,998 INFO L85 PathProgramCache]: Analyzing trace with hash 969379333, now seen corresponding path program 1 times [2024-11-22 21:42:19,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:19,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644882699] [2024-11-22 21:42:19,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:19,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:20,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:20,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644882699] [2024-11-22 21:42:20,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644882699] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:42:20,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:42:20,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:42:20,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124677643] [2024-11-22 21:42:20,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:20,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:42:20,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:20,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:42:20,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:42:20,134 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-22 21:42:20,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 65 transitions, 519 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:20,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:20,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-22 21:42:20,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:20,374 INFO L124 PetriNetUnfolderBase]: 910/2240 cut-off events. [2024-11-22 21:42:20,374 INFO L125 PetriNetUnfolderBase]: For 10724/10779 co-relation queries the response was YES. [2024-11-22 21:42:20,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9012 conditions, 2240 events. 910/2240 cut-off events. For 10724/10779 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 14691 event pairs, 578 based on Foata normal form. 22/2258 useless extension candidates. Maximal degree in co-relation 8881. Up to 1323 conditions per place. [2024-11-22 21:42:20,392 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 73 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2024-11-22 21:42:20,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 91 transitions, 895 flow [2024-11-22 21:42:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:42:20,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:42:20,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-11-22 21:42:20,393 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-11-22 21:42:20,393 INFO L175 Difference]: Start difference. First operand has 107 places, 65 transitions, 519 flow. Second operand 4 states and 117 transitions. [2024-11-22 21:42:20,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 91 transitions, 895 flow [2024-11-22 21:42:20,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 91 transitions, 829 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-11-22 21:42:20,405 INFO L231 Difference]: Finished difference. Result has 101 places, 67 transitions, 521 flow [2024-11-22 21:42:20,405 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=521, PETRI_PLACES=101, PETRI_TRANSITIONS=67} [2024-11-22 21:42:20,406 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-11-22 21:42:20,406 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 67 transitions, 521 flow [2024-11-22 21:42:20,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:20,406 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:20,406 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:20,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-22 21:42:20,406 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:20,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:20,407 INFO L85 PathProgramCache]: Analyzing trace with hash 2119386297, now seen corresponding path program 2 times [2024-11-22 21:42:20,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:20,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432468457] [2024-11-22 21:42:20,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:42:20,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:20,431 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:42:20,432 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:42:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:20,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:20,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432468457] [2024-11-22 21:42:20,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432468457] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:42:20,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:42:20,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:42:20,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075808249] [2024-11-22 21:42:20,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:20,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:42:20,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:20,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:42:20,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:42:20,534 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-11-22 21:42:20,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 67 transitions, 521 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:20,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:20,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-11-22 21:42:20,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:20,720 INFO L124 PetriNetUnfolderBase]: 627/1686 cut-off events. [2024-11-22 21:42:20,720 INFO L125 PetriNetUnfolderBase]: For 9338/9406 co-relation queries the response was YES. [2024-11-22 21:42:20,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7031 conditions, 1686 events. 627/1686 cut-off events. For 9338/9406 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 11039 event pairs, 46 based on Foata normal form. 22/1691 useless extension candidates. Maximal degree in co-relation 6908. Up to 947 conditions per place. [2024-11-22 21:42:20,731 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 61 selfloop transitions, 8 changer transitions 1/85 dead transitions. [2024-11-22 21:42:20,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 85 transitions, 837 flow [2024-11-22 21:42:20,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:42:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:42:20,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-11-22 21:42:20,732 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2024-11-22 21:42:20,732 INFO L175 Difference]: Start difference. First operand has 101 places, 67 transitions, 521 flow. Second operand 4 states and 110 transitions. [2024-11-22 21:42:20,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 85 transitions, 837 flow [2024-11-22 21:42:20,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 85 transitions, 829 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-22 21:42:20,743 INFO L231 Difference]: Finished difference. Result has 105 places, 68 transitions, 569 flow [2024-11-22 21:42:20,743 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=569, PETRI_PLACES=105, PETRI_TRANSITIONS=68} [2024-11-22 21:42:20,743 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-11-22 21:42:20,744 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 68 transitions, 569 flow [2024-11-22 21:42:20,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:20,744 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:20,744 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:20,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-22 21:42:20,744 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:20,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:20,745 INFO L85 PathProgramCache]: Analyzing trace with hash -117255083, now seen corresponding path program 2 times [2024-11-22 21:42:20,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:20,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066995669] [2024-11-22 21:42:20,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:42:20,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:20,773 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:42:20,774 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:42:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-22 21:42:21,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:21,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066995669] [2024-11-22 21:42:21,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066995669] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:21,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917310626] [2024-11-22 21:42:21,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:42:21,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:21,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:21,076 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:21,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 21:42:21,187 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:42:21,188 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:42:21,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-22 21:42:21,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:21,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:21,201 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 [2024-11-22 21:42:21,262 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:42:21,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:42:21,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-22 21:42:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:42:21,679 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:42:22,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917310626] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:22,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:22,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 12] total 33 [2024-11-22 21:42:22,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30966533] [2024-11-22 21:42:22,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:22,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-22 21:42:22,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:22,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-22 21:42:22,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=931, Unknown=0, NotChecked=0, Total=1190 [2024-11-22 21:42:23,098 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-11-22 21:42:23,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 68 transitions, 569 flow. Second operand has 35 states, 35 states have (on average 17.457142857142856) internal successors, (611), 35 states have internal predecessors, (611), 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) [2024-11-22 21:42:23,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:23,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-11-22 21:42:23,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:23,882 INFO L124 PetriNetUnfolderBase]: 1102/2153 cut-off events. [2024-11-22 21:42:23,882 INFO L125 PetriNetUnfolderBase]: For 12809/12887 co-relation queries the response was YES. [2024-11-22 21:42:23,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9260 conditions, 2153 events. 1102/2153 cut-off events. For 12809/12887 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 12230 event pairs, 73 based on Foata normal form. 56/2173 useless extension candidates. Maximal degree in co-relation 9134. Up to 400 conditions per place. [2024-11-22 21:42:23,894 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 139 selfloop transitions, 18 changer transitions 0/166 dead transitions. [2024-11-22 21:42:23,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 166 transitions, 1637 flow [2024-11-22 21:42:23,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 21:42:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-22 21:42:23,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 345 transitions. [2024-11-22 21:42:23,897 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5133928571428571 [2024-11-22 21:42:23,897 INFO L175 Difference]: Start difference. First operand has 105 places, 68 transitions, 569 flow. Second operand 16 states and 345 transitions. [2024-11-22 21:42:23,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 166 transitions, 1637 flow [2024-11-22 21:42:23,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 166 transitions, 1589 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-11-22 21:42:23,906 INFO L231 Difference]: Finished difference. Result has 111 places, 68 transitions, 566 flow [2024-11-22 21:42:23,907 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=566, PETRI_PLACES=111, PETRI_TRANSITIONS=68} [2024-11-22 21:42:23,907 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-11-22 21:42:23,907 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 68 transitions, 566 flow [2024-11-22 21:42:23,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 17.457142857142856) internal successors, (611), 35 states have internal predecessors, (611), 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) [2024-11-22 21:42:23,907 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:23,908 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:23,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 21:42:24,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-22 21:42:24,110 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-22 21:42:24,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:24,111 INFO L85 PathProgramCache]: Analyzing trace with hash -438428342, now seen corresponding path program 1 times [2024-11-22 21:42:24,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:24,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538030750] [2024-11-22 21:42:24,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:24,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:42:25,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:25,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538030750] [2024-11-22 21:42:25,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538030750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:25,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729879785] [2024-11-22 21:42:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:25,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:25,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:25,631 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:25,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 21:42:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:25,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-22 21:42:25,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:25,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:42:25,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-22 21:42:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:25,944 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:58,801 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-22 21:42:58,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 50 [2024-11-22 21:42:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:58,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729879785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:58,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:58,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10, 10] total 42 [2024-11-22 21:42:58,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306678670] [2024-11-22 21:42:58,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:58,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-22 21:42:58,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:58,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-22 21:42:58,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1520, Unknown=7, NotChecked=0, Total=1722 [2024-11-22 21:43:02,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:43:06,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:43:10,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:43:15,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:43:19,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:43:23,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:43:27,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:43:31,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:43:35,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]