./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-counter-fun.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/popl20-counter-fun.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 fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:47:17,443 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:47:17,493 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:47:17,496 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:47:17,496 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:47:17,510 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:47:17,511 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:47:17,511 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:47:17,511 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:47:17,512 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:47:17,512 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:47:17,512 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:47:17,513 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:47:17,513 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:47:17,513 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:47:17,514 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:47:17,514 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:47:17,514 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:47:17,514 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:47:17,515 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:47:17,515 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:47:17,517 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:47:17,518 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:47:17,518 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:47:17,518 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:47:17,518 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:47:17,518 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:47:17,518 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:47:17,519 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:47:17,519 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:47:17,519 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:47:17,519 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:47:17,519 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:47:17,519 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:47:17,520 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:47:17,520 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:47:17,520 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:47:17,520 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:47:17,520 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:47:17,520 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:47:17,521 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:47:17,523 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:47:17,524 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 [2024-11-22 21:47:17,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:47:17,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:47:17,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:47:17,747 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:47:17,747 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:47:17,748 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2024-11-22 21:47:18,913 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:47:19,090 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:47:19,091 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2024-11-22 21:47:19,114 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32e1ec43c/f1f1246a32ee45e5ab3b4c355591bec8/FLAG923ce943c [2024-11-22 21:47:19,482 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32e1ec43c/f1f1246a32ee45e5ab3b4c355591bec8 [2024-11-22 21:47:19,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:47:19,485 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:47:19,486 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:47:19,486 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:47:19,491 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:47:19,491 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:47:19" (1/1) ... [2024-11-22 21:47:19,492 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53913302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:19, skipping insertion in model container [2024-11-22 21:47:19,492 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:47:19" (1/1) ... [2024-11-22 21:47:19,512 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:47:19,683 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 21:47:19,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:47:19,695 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:47:19,721 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:47:19,734 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:47:19,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:19 WrapperNode [2024-11-22 21:47:19,735 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:47:19,736 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:47:19,736 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:47:19,736 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:47:19,742 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:19" (1/1) ... [2024-11-22 21:47:19,751 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:19" (1/1) ... [2024-11-22 21:47:19,771 INFO L138 Inliner]: procedures = 23, calls = 36, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 193 [2024-11-22 21:47:19,771 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:47:19,772 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:47:19,772 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:47:19,772 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:47:19,781 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:19" (1/1) ... [2024-11-22 21:47:19,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:19" (1/1) ... [2024-11-22 21:47:19,783 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:19" (1/1) ... [2024-11-22 21:47:19,795 INFO L175 MemorySlicer]: Split 14 memory accesses to 2 slices as follows [2, 12]. 86 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 21:47:19,795 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:19" (1/1) ... [2024-11-22 21:47:19,796 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:19" (1/1) ... [2024-11-22 21:47:19,800 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:19" (1/1) ... [2024-11-22 21:47:19,803 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:19" (1/1) ... [2024-11-22 21:47:19,804 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:19" (1/1) ... [2024-11-22 21:47:19,805 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:19" (1/1) ... [2024-11-22 21:47:19,807 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:47:19,808 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:47:19,808 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:47:19,808 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:47:19,809 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:19" (1/1) ... [2024-11-22 21:47:19,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:47:19,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:19,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 21:47:19,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 21:47:19,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:47:19,872 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:47:19,872 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:47:19,872 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:47:19,872 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:47:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:47:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:47:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:47:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:47:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-22 21:47:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-22 21:47:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:47:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:47:19,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:47:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:47:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:47:19,875 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 21:47:19,953 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:47:19,955 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:47:20,270 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:47:20,270 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:47:20,584 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:47:20,585 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-22 21:47:20,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:47:20 BoogieIcfgContainer [2024-11-22 21:47:20,585 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:47:20,587 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:47:20,588 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:47:20,590 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:47:20,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:47:19" (1/3) ... [2024-11-22 21:47:20,591 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a906458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:47:20, skipping insertion in model container [2024-11-22 21:47:20,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:19" (2/3) ... [2024-11-22 21:47:20,592 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a906458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:47:20, skipping insertion in model container [2024-11-22 21:47:20,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:47:20" (3/3) ... [2024-11-22 21:47:20,593 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2024-11-22 21:47:20,608 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:47:20,608 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2024-11-22 21:47:20,608 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:47:20,677 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 21:47:20,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 54 transitions, 122 flow [2024-11-22 21:47:20,736 INFO L124 PetriNetUnfolderBase]: 4/52 cut-off events. [2024-11-22 21:47:20,736 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 21:47:20,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 52 events. 4/52 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 160 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-11-22 21:47:20,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 54 transitions, 122 flow [2024-11-22 21:47:20,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 51 transitions, 114 flow [2024-11-22 21:47:20,756 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:47:20,763 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;@4c906c17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:47:20,763 INFO L334 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2024-11-22 21:47:20,768 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:47:20,768 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:47:20,768 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:47:20,769 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:20,769 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:47:20,770 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:20,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:20,776 INFO L85 PathProgramCache]: Analyzing trace with hash 674733, now seen corresponding path program 1 times [2024-11-22 21:47:20,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:20,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740421992] [2024-11-22 21:47:20,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:20,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:20,999 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 21:47:21,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:21,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740421992] [2024-11-22 21:47:21,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740421992] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:21,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:21,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:47:21,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782516795] [2024-11-22 21:47:21,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:21,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:47:21,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:21,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:47:21,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:47:21,048 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:21,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 21:47:21,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:21,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:21,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:21,239 INFO L124 PetriNetUnfolderBase]: 219/390 cut-off events. [2024-11-22 21:47:21,239 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-22 21:47:21,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 390 events. 219/390 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 1955 event pairs, 182 based on Foata normal form. 1/240 useless extension candidates. Maximal degree in co-relation 729. Up to 373 conditions per place. [2024-11-22 21:47:21,245 INFO L140 encePairwiseOnDemand]: 37/54 looper letters, 28 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-11-22 21:47:21,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 142 flow [2024-11-22 21:47:21,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:47:21,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:47:21,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-11-22 21:47:21,264 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-11-22 21:47:21,265 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 114 flow. Second operand 3 states and 69 transitions. [2024-11-22 21:47:21,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 142 flow [2024-11-22 21:47:21,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:47:21,270 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 78 flow [2024-11-22 21:47:21,272 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, 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 21:47:21,274 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -18 predicate places. [2024-11-22 21:47:21,274 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 78 flow [2024-11-22 21:47:21,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 21:47:21,274 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:21,274 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:47:21,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:47:21,275 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:21,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:21,275 INFO L85 PathProgramCache]: Analyzing trace with hash 674734, now seen corresponding path program 1 times [2024-11-22 21:47:21,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:21,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968893946] [2024-11-22 21:47:21,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:21,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:21,488 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 21:47:21,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:21,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968893946] [2024-11-22 21:47:21,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968893946] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:21,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:21,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:47:21,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921444015] [2024-11-22 21:47:21,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:21,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:47:21,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:21,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:47:21,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:47:21,501 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:21,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 21:47:21,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:21,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:21,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:21,643 INFO L124 PetriNetUnfolderBase]: 220/393 cut-off events. [2024-11-22 21:47:21,644 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-22 21:47:21,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 790 conditions, 393 events. 220/393 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 1945 event pairs, 182 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 761. Up to 382 conditions per place. [2024-11-22 21:47:21,646 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 31 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-11-22 21:47:21,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 154 flow [2024-11-22 21:47:21,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:47:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:47:21,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-11-22 21:47:21,649 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3148148148148148 [2024-11-22 21:47:21,649 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 78 flow. Second operand 4 states and 68 transitions. [2024-11-22 21:47:21,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 154 flow [2024-11-22 21:47:21,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 150 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:47:21,650 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 101 flow [2024-11-22 21:47:21,650 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, 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=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2024-11-22 21:47:21,651 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -15 predicate places. [2024-11-22 21:47:21,651 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 101 flow [2024-11-22 21:47:21,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 21:47:21,651 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:21,652 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-22 21:47:21,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:47:21,653 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:21,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:21,654 INFO L85 PathProgramCache]: Analyzing trace with hash 20917903, now seen corresponding path program 1 times [2024-11-22 21:47:21,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:21,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621452687] [2024-11-22 21:47:21,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:21,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:21,816 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 21:47:21,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:21,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621452687] [2024-11-22 21:47:21,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621452687] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:21,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:21,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:47:21,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54421214] [2024-11-22 21:47:21,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:21,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:47:21,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:21,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:47:21,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:47:21,835 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:21,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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 21:47:21,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:21,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:21,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:21,977 INFO L124 PetriNetUnfolderBase]: 221/396 cut-off events. [2024-11-22 21:47:21,978 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-22 21:47:21,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 396 events. 221/396 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 1970 event pairs, 182 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 782. Up to 381 conditions per place. [2024-11-22 21:47:21,980 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 31 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2024-11-22 21:47:21,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 183 flow [2024-11-22 21:47:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:47:21,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:47:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-11-22 21:47:21,982 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.29259259259259257 [2024-11-22 21:47:21,983 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 101 flow. Second operand 5 states and 79 transitions. [2024-11-22 21:47:21,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 183 flow [2024-11-22 21:47:21,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:47:21,984 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 135 flow [2024-11-22 21:47:21,985 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=135, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2024-11-22 21:47:21,986 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -10 predicate places. [2024-11-22 21:47:21,986 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 135 flow [2024-11-22 21:47:21,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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 21:47:21,986 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:21,986 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:47:21,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 21:47:21,987 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:21,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:21,987 INFO L85 PathProgramCache]: Analyzing trace with hash 648440628, now seen corresponding path program 1 times [2024-11-22 21:47:21,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:21,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108423486] [2024-11-22 21:47:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:21,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:22,133 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 21:47:22,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:22,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108423486] [2024-11-22 21:47:22,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108423486] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:22,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923599254] [2024-11-22 21:47:22,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:22,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:22,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:22,140 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 21:47:22,141 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 21:47:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:22,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 21:47:22,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:22,269 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 21:47:22,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:22,374 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:22,468 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 21:47:22,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923599254] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:22,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:22,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:47:22,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230258341] [2024-11-22 21:47:22,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:22,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:47:22,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:22,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:47:22,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:47:22,522 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:22,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 135 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 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 21:47:22,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:22,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:22,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:22,757 INFO L124 PetriNetUnfolderBase]: 221/395 cut-off events. [2024-11-22 21:47:22,757 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-22 21:47:22,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 820 conditions, 395 events. 221/395 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 1983 event pairs, 182 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 792. Up to 381 conditions per place. [2024-11-22 21:47:22,760 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 30 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2024-11-22 21:47:22,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 205 flow [2024-11-22 21:47:22,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:47:22,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:47:22,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 83 transitions. [2024-11-22 21:47:22,761 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.25617283950617287 [2024-11-22 21:47:22,761 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 135 flow. Second operand 6 states and 83 transitions. [2024-11-22 21:47:22,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 205 flow [2024-11-22 21:47:22,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 40 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:47:22,763 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 144 flow [2024-11-22 21:47:22,763 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=144, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-11-22 21:47:22,763 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -7 predicate places. [2024-11-22 21:47:22,763 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 144 flow [2024-11-22 21:47:22,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 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 21:47:22,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:22,764 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-22 21:47:22,779 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 21:47:22,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:22,970 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:22,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:22,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1372709778, now seen corresponding path program 1 times [2024-11-22 21:47:22,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:22,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641499072] [2024-11-22 21:47:22,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:22,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:23,134 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 21:47:23,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:23,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641499072] [2024-11-22 21:47:23,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641499072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:23,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042934504] [2024-11-22 21:47:23,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:23,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:23,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:23,138 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 21:47:23,139 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 21:47:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:23,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-22 21:47:23,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:23,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-22 21:47:23,346 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 21:47:23,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:23,460 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 21:47:23,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042934504] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:23,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:23,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-22 21:47:23,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540218407] [2024-11-22 21:47:23,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:23,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:47:23,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:23,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:47:23,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:47:23,519 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:23,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 144 flow. Second operand has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 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 21:47:23,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:23,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:23,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:23,834 INFO L124 PetriNetUnfolderBase]: 223/400 cut-off events. [2024-11-22 21:47:23,835 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-22 21:47:23,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 400 events. 223/400 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 1994 event pairs, 182 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 800. Up to 374 conditions per place. [2024-11-22 21:47:23,837 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 24 selfloop transitions, 18 changer transitions 0/45 dead transitions. [2024-11-22 21:47:23,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 257 flow [2024-11-22 21:47:23,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:47:23,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:47:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-11-22 21:47:23,838 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.23868312757201646 [2024-11-22 21:47:23,838 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 144 flow. Second operand 9 states and 116 transitions. [2024-11-22 21:47:23,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 257 flow [2024-11-22 21:47:23,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 210 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-22 21:47:23,840 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 162 flow [2024-11-22 21:47:23,840 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=162, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2024-11-22 21:47:23,840 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -8 predicate places. [2024-11-22 21:47:23,840 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 162 flow [2024-11-22 21:47:23,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 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 21:47:23,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:23,841 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:23,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 21:47:24,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:24,045 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:24,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:24,045 INFO L85 PathProgramCache]: Analyzing trace with hash 398409378, now seen corresponding path program 1 times [2024-11-22 21:47:24,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:24,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917949398] [2024-11-22 21:47:24,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:24,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:24,103 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 21:47:24,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:24,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917949398] [2024-11-22 21:47:24,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917949398] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:24,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:24,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:47:24,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735224338] [2024-11-22 21:47:24,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:24,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:47:24,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:24,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:47:24,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:47:24,112 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-11-22 21:47:24,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 21:47:24,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:24,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-11-22 21:47:24,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:24,234 INFO L124 PetriNetUnfolderBase]: 286/532 cut-off events. [2024-11-22 21:47:24,235 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-22 21:47:24,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 532 events. 286/532 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 2767 event pairs, 213 based on Foata normal form. 15/372 useless extension candidates. Maximal degree in co-relation 701. Up to 395 conditions per place. [2024-11-22 21:47:24,237 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 61 selfloop transitions, 6 changer transitions 0/70 dead transitions. [2024-11-22 21:47:24,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 70 transitions, 388 flow [2024-11-22 21:47:24,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:47:24,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:47:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-11-22 21:47:24,239 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-11-22 21:47:24,239 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 162 flow. Second operand 5 states and 110 transitions. [2024-11-22 21:47:24,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 70 transitions, 388 flow [2024-11-22 21:47:24,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 70 transitions, 335 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-22 21:47:24,242 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 173 flow [2024-11-22 21:47:24,242 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2024-11-22 21:47:24,243 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -7 predicate places. [2024-11-22 21:47:24,244 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 173 flow [2024-11-22 21:47:24,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 21:47:24,244 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:24,244 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:24,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 21:47:24,244 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:24,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:24,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1284778792, now seen corresponding path program 1 times [2024-11-22 21:47:24,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:24,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311627617] [2024-11-22 21:47:24,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:24,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:24,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:24,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311627617] [2024-11-22 21:47:24,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311627617] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:24,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:24,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:47:24,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95923461] [2024-11-22 21:47:24,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:24,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:47:24,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:24,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:47:24,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:47:24,313 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:24,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 173 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 21:47:24,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:24,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:24,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:24,396 INFO L124 PetriNetUnfolderBase]: 230/435 cut-off events. [2024-11-22 21:47:24,396 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-11-22 21:47:24,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1002 conditions, 435 events. 230/435 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2108 event pairs, 176 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 641. Up to 399 conditions per place. [2024-11-22 21:47:24,398 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 35 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2024-11-22 21:47:24,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 253 flow [2024-11-22 21:47:24,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:47:24,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:47:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2024-11-22 21:47:24,399 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.25925925925925924 [2024-11-22 21:47:24,399 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 173 flow. Second operand 5 states and 70 transitions. [2024-11-22 21:47:24,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 253 flow [2024-11-22 21:47:24,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:47:24,401 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 177 flow [2024-11-22 21:47:24,401 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2024-11-22 21:47:24,401 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -7 predicate places. [2024-11-22 21:47:24,401 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 177 flow [2024-11-22 21:47:24,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 21:47:24,401 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:24,401 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:24,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-22 21:47:24,402 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:24,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:24,402 INFO L85 PathProgramCache]: Analyzing trace with hash 587986893, now seen corresponding path program 1 times [2024-11-22 21:47:24,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:24,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054209471] [2024-11-22 21:47:24,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:24,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:24,439 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 21:47:24,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:24,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054209471] [2024-11-22 21:47:24,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054209471] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:24,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:24,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:47:24,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743172595] [2024-11-22 21:47:24,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:24,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:47:24,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:24,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:47:24,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:47:24,454 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:24,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 177 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 21:47:24,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:24,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:24,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:24,510 INFO L124 PetriNetUnfolderBase]: 180/348 cut-off events. [2024-11-22 21:47:24,510 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-11-22 21:47:24,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 805 conditions, 348 events. 180/348 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1525 event pairs, 132 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 438. Up to 313 conditions per place. [2024-11-22 21:47:24,512 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 36 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2024-11-22 21:47:24,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 253 flow [2024-11-22 21:47:24,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:47:24,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:47:24,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-11-22 21:47:24,513 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2777777777777778 [2024-11-22 21:47:24,513 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 177 flow. Second operand 4 states and 60 transitions. [2024-11-22 21:47:24,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 253 flow [2024-11-22 21:47:24,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 241 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:47:24,516 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 169 flow [2024-11-22 21:47:24,516 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2024-11-22 21:47:24,517 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2024-11-22 21:47:24,518 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 169 flow [2024-11-22 21:47:24,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 21:47:24,518 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:24,518 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:24,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 21:47:24,518 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:24,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:24,519 INFO L85 PathProgramCache]: Analyzing trace with hash 587986894, now seen corresponding path program 1 times [2024-11-22 21:47:24,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:24,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358798634] [2024-11-22 21:47:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:24,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:24,592 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 21:47:24,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:24,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358798634] [2024-11-22 21:47:24,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358798634] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:24,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:24,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:47:24,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780850935] [2024-11-22 21:47:24,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:24,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:47:24,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:24,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:47:24,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:47:24,610 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-11-22 21:47:24,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 169 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 21:47:24,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:24,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-11-22 21:47:24,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:24,723 INFO L124 PetriNetUnfolderBase]: 316/629 cut-off events. [2024-11-22 21:47:24,723 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2024-11-22 21:47:24,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 629 events. 316/629 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3160 event pairs, 175 based on Foata normal form. 22/565 useless extension candidates. Maximal degree in co-relation 552. Up to 240 conditions per place. [2024-11-22 21:47:24,726 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 52 selfloop transitions, 10 changer transitions 5/70 dead transitions. [2024-11-22 21:47:24,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 70 transitions, 372 flow [2024-11-22 21:47:24,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:47:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:47:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-11-22 21:47:24,727 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2024-11-22 21:47:24,727 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 169 flow. Second operand 5 states and 112 transitions. [2024-11-22 21:47:24,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 70 transitions, 372 flow [2024-11-22 21:47:24,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 70 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:47:24,729 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 209 flow [2024-11-22 21:47:24,729 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=209, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2024-11-22 21:47:24,730 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -5 predicate places. [2024-11-22 21:47:24,730 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 209 flow [2024-11-22 21:47:24,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 21:47:24,731 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:24,731 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:24,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-22 21:47:24,731 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:24,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:24,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1284778793, now seen corresponding path program 1 times [2024-11-22 21:47:24,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:24,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661915175] [2024-11-22 21:47:24,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:24,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:24,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:24,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661915175] [2024-11-22 21:47:24,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661915175] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:24,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916016439] [2024-11-22 21:47:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:24,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:24,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:24,871 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 21:47:24,872 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 21:47:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:24,925 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-22 21:47:24,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:24,930 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 21:47:24,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:47:24,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-22 21:47:24,988 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:47:24,988 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 21:47:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:25,016 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:25,102 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 61 treesize of output 57 [2024-11-22 21:47:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:25,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916016439] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:25,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:25,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:47:25,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980631378] [2024-11-22 21:47:25,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:25,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:47:25,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:25,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:47:25,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:47:25,229 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:25,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 209 flow. Second operand has 11 states, 11 states have (on average 10.181818181818182) internal successors, (112), 11 states have internal predecessors, (112), 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 21:47:25,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:25,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:25,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:25,602 INFO L124 PetriNetUnfolderBase]: 398/776 cut-off events. [2024-11-22 21:47:25,602 INFO L125 PetriNetUnfolderBase]: For 645/645 co-relation queries the response was YES. [2024-11-22 21:47:25,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2062 conditions, 776 events. 398/776 cut-off events. For 645/645 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3891 event pairs, 178 based on Foata normal form. 38/745 useless extension candidates. Maximal degree in co-relation 1256. Up to 256 conditions per place. [2024-11-22 21:47:25,606 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 73 selfloop transitions, 17 changer transitions 2/95 dead transitions. [2024-11-22 21:47:25,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 95 transitions, 576 flow [2024-11-22 21:47:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:47:25,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:47:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-11-22 21:47:25,607 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3230452674897119 [2024-11-22 21:47:25,607 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 209 flow. Second operand 9 states and 157 transitions. [2024-11-22 21:47:25,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 95 transitions, 576 flow [2024-11-22 21:47:25,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 95 transitions, 572 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:47:25,609 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 301 flow [2024-11-22 21:47:25,609 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=301, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2024-11-22 21:47:25,610 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2024-11-22 21:47:25,610 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 301 flow [2024-11-22 21:47:25,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.181818181818182) internal successors, (112), 11 states have internal predecessors, (112), 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 21:47:25,610 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:25,610 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:25,630 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 21:47:25,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:25,814 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:25,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:25,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1139924309, now seen corresponding path program 1 times [2024-11-22 21:47:25,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:25,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151454438] [2024-11-22 21:47:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:25,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:25,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:25,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151454438] [2024-11-22 21:47:25,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151454438] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:25,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:25,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:47:25,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858721743] [2024-11-22 21:47:25,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:25,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:47:25,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:25,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:47:25,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:47:25,917 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-11-22 21:47:25,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 301 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 21:47:25,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:25,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-11-22 21:47:25,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:26,031 INFO L124 PetriNetUnfolderBase]: 346/672 cut-off events. [2024-11-22 21:47:26,031 INFO L125 PetriNetUnfolderBase]: For 1482/1482 co-relation queries the response was YES. [2024-11-22 21:47:26,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2042 conditions, 672 events. 346/672 cut-off events. For 1482/1482 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3227 event pairs, 267 based on Foata normal form. 4/635 useless extension candidates. Maximal degree in co-relation 1802. Up to 552 conditions per place. [2024-11-22 21:47:26,035 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 56 selfloop transitions, 4 changer transitions 2/65 dead transitions. [2024-11-22 21:47:26,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 463 flow [2024-11-22 21:47:26,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:47:26,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:47:26,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-11-22 21:47:26,036 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3592592592592593 [2024-11-22 21:47:26,036 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 301 flow. Second operand 5 states and 97 transitions. [2024-11-22 21:47:26,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 463 flow [2024-11-22 21:47:26,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 65 transitions, 441 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-22 21:47:26,040 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 280 flow [2024-11-22 21:47:26,040 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=280, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2024-11-22 21:47:26,040 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2024-11-22 21:47:26,040 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 280 flow [2024-11-22 21:47:26,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 21:47:26,041 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:26,041 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:26,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-22 21:47:26,041 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:26,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:26,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1139924303, now seen corresponding path program 1 times [2024-11-22 21:47:26,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:26,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222709260] [2024-11-22 21:47:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:26,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:26,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:26,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222709260] [2024-11-22 21:47:26,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222709260] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:26,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950253924] [2024-11-22 21:47:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:26,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:26,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:26,182 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 21:47:26,184 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 21:47:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:26,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:47:26,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:26,306 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:26,357 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 29 treesize of output 25 [2024-11-22 21:47:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:26,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950253924] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:26,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:26,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-22 21:47:26,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146579822] [2024-11-22 21:47:26,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:26,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 21:47:26,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:26,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 21:47:26,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:47:26,454 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-11-22 21:47:26,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 280 flow. Second operand has 12 states, 12 states have (on average 12.333333333333334) internal successors, (148), 12 states have internal predecessors, (148), 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 21:47:26,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:26,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-11-22 21:47:26,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:26,700 INFO L124 PetriNetUnfolderBase]: 368/727 cut-off events. [2024-11-22 21:47:26,700 INFO L125 PetriNetUnfolderBase]: For 1643/1643 co-relation queries the response was YES. [2024-11-22 21:47:26,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2298 conditions, 727 events. 368/727 cut-off events. For 1643/1643 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3470 event pairs, 71 based on Foata normal form. 31/748 useless extension candidates. Maximal degree in co-relation 2128. Up to 208 conditions per place. [2024-11-22 21:47:26,704 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 63 selfloop transitions, 16 changer transitions 5/87 dead transitions. [2024-11-22 21:47:26,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 629 flow [2024-11-22 21:47:26,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:47:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:47:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-11-22 21:47:26,705 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-11-22 21:47:26,705 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 280 flow. Second operand 7 states and 142 transitions. [2024-11-22 21:47:26,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 629 flow [2024-11-22 21:47:26,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 87 transitions, 622 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:47:26,708 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 369 flow [2024-11-22 21:47:26,708 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=369, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2024-11-22 21:47:26,709 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-11-22 21:47:26,709 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 369 flow [2024-11-22 21:47:26,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.333333333333334) internal successors, (148), 12 states have internal predecessors, (148), 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 21:47:26,710 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:26,710 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:26,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:47:26,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:26,914 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:26,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:26,914 INFO L85 PathProgramCache]: Analyzing trace with hash -612469904, now seen corresponding path program 1 times [2024-11-22 21:47:26,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:26,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045213475] [2024-11-22 21:47:26,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:26,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:27,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:27,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045213475] [2024-11-22 21:47:27,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045213475] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:27,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491919683] [2024-11-22 21:47:27,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:27,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:27,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:27,070 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 21:47:27,071 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 21:47:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:27,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-22 21:47:27,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:27,173 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:47:27,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491919683] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:27,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:47:27,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-22 21:47:27,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143606569] [2024-11-22 21:47:27,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:27,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:47:27,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:27,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:47:27,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-22 21:47:27,186 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-11-22 21:47:27,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 51 transitions, 369 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:27,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:27,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-11-22 21:47:27,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:27,260 INFO L124 PetriNetUnfolderBase]: 247/488 cut-off events. [2024-11-22 21:47:27,260 INFO L125 PetriNetUnfolderBase]: For 2389/2389 co-relation queries the response was YES. [2024-11-22 21:47:27,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1698 conditions, 488 events. 247/488 cut-off events. For 2389/2389 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2178 event pairs, 190 based on Foata normal form. 59/536 useless extension candidates. Maximal degree in co-relation 1612. Up to 432 conditions per place. [2024-11-22 21:47:27,263 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 39 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-11-22 21:47:27,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 46 transitions, 399 flow [2024-11-22 21:47:27,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:47:27,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:47:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2024-11-22 21:47:27,264 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3055555555555556 [2024-11-22 21:47:27,264 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 369 flow. Second operand 4 states and 66 transitions. [2024-11-22 21:47:27,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 46 transitions, 399 flow [2024-11-22 21:47:27,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 46 transitions, 349 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-11-22 21:47:27,266 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 271 flow [2024-11-22 21:47:27,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=271, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2024-11-22 21:47:27,267 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2024-11-22 21:47:27,267 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 271 flow [2024-11-22 21:47:27,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:27,267 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:27,267 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:27,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 21:47:27,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-22 21:47:27,468 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:27,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:27,469 INFO L85 PathProgramCache]: Analyzing trace with hash -204400933, now seen corresponding path program 1 times [2024-11-22 21:47:27,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:27,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504977047] [2024-11-22 21:47:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:27,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:27,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:27,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504977047] [2024-11-22 21:47:27,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504977047] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:27,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126505459] [2024-11-22 21:47:27,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:27,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:27,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:27,651 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 21:47:27,652 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 21:47:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:27,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-22 21:47:27,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:27,722 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 21:47:27,780 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:47:27,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-22 21:47:27,792 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:47:27,793 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 21:47:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:27,849 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:47:27,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126505459] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:27,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:47:27,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 7 [2024-11-22 21:47:27,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922302318] [2024-11-22 21:47:27,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:27,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:47:27,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:27,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:47:27,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-22 21:47:27,867 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:27,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 271 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:27,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:27,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:27,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:27,950 INFO L124 PetriNetUnfolderBase]: 167/343 cut-off events. [2024-11-22 21:47:27,950 INFO L125 PetriNetUnfolderBase]: For 973/973 co-relation queries the response was YES. [2024-11-22 21:47:27,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1007 conditions, 343 events. 167/343 cut-off events. For 973/973 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1332 event pairs, 122 based on Foata normal form. 44/381 useless extension candidates. Maximal degree in co-relation 928. Up to 291 conditions per place. [2024-11-22 21:47:27,952 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 33 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2024-11-22 21:47:27,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 41 transitions, 298 flow [2024-11-22 21:47:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:47:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:47:27,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-11-22 21:47:27,952 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.23703703703703705 [2024-11-22 21:47:27,953 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 271 flow. Second operand 5 states and 64 transitions. [2024-11-22 21:47:27,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 41 transitions, 298 flow [2024-11-22 21:47:27,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 41 transitions, 265 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-22 21:47:27,954 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 199 flow [2024-11-22 21:47:27,954 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2024-11-22 21:47:27,954 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2024-11-22 21:47:27,955 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 199 flow [2024-11-22 21:47:27,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:27,955 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:27,955 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:27,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:47:28,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:28,159 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:28,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:28,160 INFO L85 PathProgramCache]: Analyzing trace with hash -868874819, now seen corresponding path program 1 times [2024-11-22 21:47:28,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:28,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731407921] [2024-11-22 21:47:28,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:28,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:47:28,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:28,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731407921] [2024-11-22 21:47:28,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731407921] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:28,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385184976] [2024-11-22 21:47:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:28,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:28,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:28,233 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 21:47:28,234 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 21:47:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:28,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-22 21:47:28,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:47:28,330 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:47:28,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385184976] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:28,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:28,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-11-22 21:47:28,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763246879] [2024-11-22 21:47:28,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:28,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:47:28,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:28,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:47:28,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:47:28,358 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:28,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 199 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 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 21:47:28,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:28,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:28,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:28,570 INFO L124 PetriNetUnfolderBase]: 392/690 cut-off events. [2024-11-22 21:47:28,571 INFO L125 PetriNetUnfolderBase]: For 320/320 co-relation queries the response was YES. [2024-11-22 21:47:28,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1807 conditions, 690 events. 392/690 cut-off events. For 320/320 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2856 event pairs, 23 based on Foata normal form. 0/587 useless extension candidates. Maximal degree in co-relation 1731. Up to 133 conditions per place. [2024-11-22 21:47:28,574 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 96 selfloop transitions, 28 changer transitions 0/125 dead transitions. [2024-11-22 21:47:28,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 125 transitions, 757 flow [2024-11-22 21:47:28,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 21:47:28,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 21:47:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 213 transitions. [2024-11-22 21:47:28,575 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28174603174603174 [2024-11-22 21:47:28,575 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 199 flow. Second operand 14 states and 213 transitions. [2024-11-22 21:47:28,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 125 transitions, 757 flow [2024-11-22 21:47:28,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 125 transitions, 749 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:47:28,577 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 359 flow [2024-11-22 21:47:28,578 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=359, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-11-22 21:47:28,579 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2024-11-22 21:47:28,579 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 359 flow [2024-11-22 21:47:28,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 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 21:47:28,579 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:28,579 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:28,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-22 21:47:28,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:28,780 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:28,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:28,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1257283555, now seen corresponding path program 2 times [2024-11-22 21:47:28,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:28,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218940770] [2024-11-22 21:47:28,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:47:28,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:28,791 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:47:28,791 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:47:28,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:28,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218940770] [2024-11-22 21:47:28,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218940770] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:28,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:28,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:47:28,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604592500] [2024-11-22 21:47:28,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:28,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:47:28,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:28,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:47:28,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:47:28,848 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-11-22 21:47:28,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 359 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 21:47:28,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:28,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-11-22 21:47:28,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:28,975 INFO L124 PetriNetUnfolderBase]: 384/703 cut-off events. [2024-11-22 21:47:28,975 INFO L125 PetriNetUnfolderBase]: For 1198/1210 co-relation queries the response was YES. [2024-11-22 21:47:28,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2543 conditions, 703 events. 384/703 cut-off events. For 1198/1210 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3135 event pairs, 105 based on Foata normal form. 4/692 useless extension candidates. Maximal degree in co-relation 2463. Up to 397 conditions per place. [2024-11-22 21:47:28,979 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 81 selfloop transitions, 14 changer transitions 4/108 dead transitions. [2024-11-22 21:47:28,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 108 transitions, 760 flow [2024-11-22 21:47:28,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:47:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:47:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-11-22 21:47:28,980 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-11-22 21:47:28,980 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 359 flow. Second operand 5 states and 90 transitions. [2024-11-22 21:47:28,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 108 transitions, 760 flow [2024-11-22 21:47:28,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 108 transitions, 760 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-22 21:47:28,983 INFO L231 Difference]: Finished difference. Result has 75 places, 75 transitions, 452 flow [2024-11-22 21:47:28,984 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=452, PETRI_PLACES=75, PETRI_TRANSITIONS=75} [2024-11-22 21:47:28,984 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2024-11-22 21:47:28,984 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 75 transitions, 452 flow [2024-11-22 21:47:28,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 21:47:28,984 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:28,984 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:28,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-22 21:47:28,984 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:28,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:28,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1546814490, now seen corresponding path program 1 times [2024-11-22 21:47:28,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:28,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978206752] [2024-11-22 21:47:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:28,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:47:29,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:29,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978206752] [2024-11-22 21:47:29,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978206752] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:29,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:29,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:47:29,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669097547] [2024-11-22 21:47:29,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:29,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:47:29,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:29,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:47:29,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:47:29,041 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-11-22 21:47:29,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 75 transitions, 452 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 21:47:29,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:29,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-11-22 21:47:29,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:29,142 INFO L124 PetriNetUnfolderBase]: 366/668 cut-off events. [2024-11-22 21:47:29,142 INFO L125 PetriNetUnfolderBase]: For 1503/1505 co-relation queries the response was YES. [2024-11-22 21:47:29,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2641 conditions, 668 events. 366/668 cut-off events. For 1503/1505 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2929 event pairs, 113 based on Foata normal form. 3/663 useless extension candidates. Maximal degree in co-relation 2557. Up to 410 conditions per place. [2024-11-22 21:47:29,146 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 83 selfloop transitions, 7 changer transitions 7/101 dead transitions. [2024-11-22 21:47:29,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 101 transitions, 801 flow [2024-11-22 21:47:29,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:47:29,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:47:29,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-11-22 21:47:29,147 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34814814814814815 [2024-11-22 21:47:29,147 INFO L175 Difference]: Start difference. First operand has 75 places, 75 transitions, 452 flow. Second operand 5 states and 94 transitions. [2024-11-22 21:47:29,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 101 transitions, 801 flow [2024-11-22 21:47:29,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 101 transitions, 770 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-22 21:47:29,151 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 453 flow [2024-11-22 21:47:29,151 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2024-11-22 21:47:29,152 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2024-11-22 21:47:29,152 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 453 flow [2024-11-22 21:47:29,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 21:47:29,152 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:29,152 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:29,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-22 21:47:29,152 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:29,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:29,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1985054877, now seen corresponding path program 3 times [2024-11-22 21:47:29,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:29,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088065794] [2024-11-22 21:47:29,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:47:29,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:29,164 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:47:29,164 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:47:29,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:29,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088065794] [2024-11-22 21:47:29,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088065794] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:29,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:29,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 21:47:29,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958711617] [2024-11-22 21:47:29,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:29,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:47:29,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:29,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:47:29,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:47:29,212 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:29,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 453 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 21:47:29,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:29,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:29,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:29,346 INFO L124 PetriNetUnfolderBase]: 479/837 cut-off events. [2024-11-22 21:47:29,346 INFO L125 PetriNetUnfolderBase]: For 2105/2105 co-relation queries the response was YES. [2024-11-22 21:47:29,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3297 conditions, 837 events. 479/837 cut-off events. For 2105/2105 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3553 event pairs, 138 based on Foata normal form. 17/852 useless extension candidates. Maximal degree in co-relation 3212. Up to 509 conditions per place. [2024-11-22 21:47:29,350 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 92 selfloop transitions, 32 changer transitions 0/125 dead transitions. [2024-11-22 21:47:29,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 125 transitions, 1012 flow [2024-11-22 21:47:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:47:29,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:47:29,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-11-22 21:47:29,351 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3271604938271605 [2024-11-22 21:47:29,351 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 453 flow. Second operand 6 states and 106 transitions. [2024-11-22 21:47:29,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 125 transitions, 1012 flow [2024-11-22 21:47:29,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 125 transitions, 975 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-22 21:47:29,356 INFO L231 Difference]: Finished difference. Result has 83 places, 90 transitions, 665 flow [2024-11-22 21:47:29,356 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=665, PETRI_PLACES=83, PETRI_TRANSITIONS=90} [2024-11-22 21:47:29,357 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 29 predicate places. [2024-11-22 21:47:29,357 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 90 transitions, 665 flow [2024-11-22 21:47:29,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 21:47:29,357 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:29,357 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:29,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-22 21:47:29,358 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:29,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:29,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1273730013, now seen corresponding path program 4 times [2024-11-22 21:47:29,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:29,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262655303] [2024-11-22 21:47:29,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:47:29,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:29,368 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:47:29,371 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:47:29,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:29,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262655303] [2024-11-22 21:47:29,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262655303] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:29,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:29,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:47:29,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171939391] [2024-11-22 21:47:29,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:29,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:47:29,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:29,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:47:29,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:47:29,402 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:29,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 90 transitions, 665 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 21:47:29,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:29,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:29,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:29,547 INFO L124 PetriNetUnfolderBase]: 518/906 cut-off events. [2024-11-22 21:47:29,548 INFO L125 PetriNetUnfolderBase]: For 2390/2390 co-relation queries the response was YES. [2024-11-22 21:47:29,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3907 conditions, 906 events. 518/906 cut-off events. For 2390/2390 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4052 event pairs, 85 based on Foata normal form. 4/908 useless extension candidates. Maximal degree in co-relation 3819. Up to 428 conditions per place. [2024-11-22 21:47:29,553 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 98 selfloop transitions, 24 changer transitions 1/124 dead transitions. [2024-11-22 21:47:29,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 124 transitions, 1139 flow [2024-11-22 21:47:29,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:47:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:47:29,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-11-22 21:47:29,554 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31851851851851853 [2024-11-22 21:47:29,554 INFO L175 Difference]: Start difference. First operand has 83 places, 90 transitions, 665 flow. Second operand 5 states and 86 transitions. [2024-11-22 21:47:29,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 124 transitions, 1139 flow [2024-11-22 21:47:29,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 124 transitions, 1112 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-22 21:47:29,560 INFO L231 Difference]: Finished difference. Result has 88 places, 97 transitions, 764 flow [2024-11-22 21:47:29,561 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=764, PETRI_PLACES=88, PETRI_TRANSITIONS=97} [2024-11-22 21:47:29,561 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 34 predicate places. [2024-11-22 21:47:29,561 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 97 transitions, 764 flow [2024-11-22 21:47:29,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 21:47:29,561 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:29,561 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:29,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-22 21:47:29,562 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:29,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:29,562 INFO L85 PathProgramCache]: Analyzing trace with hash 676611924, now seen corresponding path program 2 times [2024-11-22 21:47:29,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:29,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167371558] [2024-11-22 21:47:29,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:47:29,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:29,572 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:47:29,572 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:47:29,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:29,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167371558] [2024-11-22 21:47:29,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167371558] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:29,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:29,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 21:47:29,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192576946] [2024-11-22 21:47:29,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:29,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:47:29,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:29,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:47:29,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:47:29,613 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:29,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 97 transitions, 764 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 21:47:29,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:29,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:29,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:29,809 INFO L124 PetriNetUnfolderBase]: 534/934 cut-off events. [2024-11-22 21:47:29,809 INFO L125 PetriNetUnfolderBase]: For 2853/2853 co-relation queries the response was YES. [2024-11-22 21:47:29,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4305 conditions, 934 events. 534/934 cut-off events. For 2853/2853 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4141 event pairs, 23 based on Foata normal form. 8/940 useless extension candidates. Maximal degree in co-relation 4214. Up to 204 conditions per place. [2024-11-22 21:47:29,814 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 93 selfloop transitions, 66 changer transitions 1/161 dead transitions. [2024-11-22 21:47:29,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 161 transitions, 1522 flow [2024-11-22 21:47:29,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:47:29,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:47:29,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-11-22 21:47:29,816 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.29012345679012347 [2024-11-22 21:47:29,816 INFO L175 Difference]: Start difference. First operand has 88 places, 97 transitions, 764 flow. Second operand 9 states and 141 transitions. [2024-11-22 21:47:29,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 161 transitions, 1522 flow [2024-11-22 21:47:29,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 161 transitions, 1495 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-22 21:47:29,827 INFO L231 Difference]: Finished difference. Result has 100 places, 125 transitions, 1231 flow [2024-11-22 21:47:29,828 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1231, PETRI_PLACES=100, PETRI_TRANSITIONS=125} [2024-11-22 21:47:29,828 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 46 predicate places. [2024-11-22 21:47:29,828 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 125 transitions, 1231 flow [2024-11-22 21:47:29,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 21:47:29,829 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:29,829 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:29,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-22 21:47:29,830 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:29,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:29,830 INFO L85 PathProgramCache]: Analyzing trace with hash -2051575363, now seen corresponding path program 5 times [2024-11-22 21:47:29,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:29,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68218044] [2024-11-22 21:47:29,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:47:29,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:29,847 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:47:29,847 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:47:29,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:29,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68218044] [2024-11-22 21:47:29,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68218044] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:29,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:29,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:47:29,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073510393] [2024-11-22 21:47:29,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:29,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:47:29,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:29,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:47:29,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:47:29,887 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:29,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 125 transitions, 1231 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 21:47:29,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:29,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:29,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:30,048 INFO L124 PetriNetUnfolderBase]: 529/928 cut-off events. [2024-11-22 21:47:30,048 INFO L125 PetriNetUnfolderBase]: For 4500/4500 co-relation queries the response was YES. [2024-11-22 21:47:30,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4763 conditions, 928 events. 529/928 cut-off events. For 4500/4500 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4150 event pairs, 38 based on Foata normal form. 13/939 useless extension candidates. Maximal degree in co-relation 4667. Up to 263 conditions per place. [2024-11-22 21:47:30,055 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 100 selfloop transitions, 58 changer transitions 2/161 dead transitions. [2024-11-22 21:47:30,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 161 transitions, 1818 flow [2024-11-22 21:47:30,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:47:30,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:47:30,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-11-22 21:47:30,056 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.30158730158730157 [2024-11-22 21:47:30,056 INFO L175 Difference]: Start difference. First operand has 100 places, 125 transitions, 1231 flow. Second operand 7 states and 114 transitions. [2024-11-22 21:47:30,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 161 transitions, 1818 flow [2024-11-22 21:47:30,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 161 transitions, 1726 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-11-22 21:47:30,070 INFO L231 Difference]: Finished difference. Result has 107 places, 126 transitions, 1307 flow [2024-11-22 21:47:30,070 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1307, PETRI_PLACES=107, PETRI_TRANSITIONS=126} [2024-11-22 21:47:30,071 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 53 predicate places. [2024-11-22 21:47:30,071 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 126 transitions, 1307 flow [2024-11-22 21:47:30,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 21:47:30,071 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:30,071 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:30,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-22 21:47:30,071 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:30,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:30,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1743040376, now seen corresponding path program 3 times [2024-11-22 21:47:30,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:30,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757945627] [2024-11-22 21:47:30,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:47:30,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:30,081 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:47:30,081 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:47:30,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:30,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757945627] [2024-11-22 21:47:30,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757945627] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:30,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:30,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 21:47:30,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727075185] [2024-11-22 21:47:30,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:30,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:47:30,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:30,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:47:30,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:47:30,128 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:30,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 126 transitions, 1307 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 21:47:30,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:30,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:30,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:30,296 INFO L124 PetriNetUnfolderBase]: 532/935 cut-off events. [2024-11-22 21:47:30,297 INFO L125 PetriNetUnfolderBase]: For 5013/5013 co-relation queries the response was YES. [2024-11-22 21:47:30,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4867 conditions, 935 events. 532/935 cut-off events. For 5013/5013 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4222 event pairs, 145 based on Foata normal form. 12/945 useless extension candidates. Maximal degree in co-relation 4770. Up to 657 conditions per place. [2024-11-22 21:47:30,304 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 117 selfloop transitions, 32 changer transitions 0/150 dead transitions. [2024-11-22 21:47:30,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 150 transitions, 1750 flow [2024-11-22 21:47:30,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:47:30,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:47:30,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-11-22 21:47:30,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3271604938271605 [2024-11-22 21:47:30,307 INFO L175 Difference]: Start difference. First operand has 107 places, 126 transitions, 1307 flow. Second operand 6 states and 106 transitions. [2024-11-22 21:47:30,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 150 transitions, 1750 flow [2024-11-22 21:47:30,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 150 transitions, 1662 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-11-22 21:47:30,321 INFO L231 Difference]: Finished difference. Result has 105 places, 128 transitions, 1323 flow [2024-11-22 21:47:30,322 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1323, PETRI_PLACES=105, PETRI_TRANSITIONS=128} [2024-11-22 21:47:30,322 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 51 predicate places. [2024-11-22 21:47:30,322 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 128 transitions, 1323 flow [2024-11-22 21:47:30,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 21:47:30,322 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:30,322 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:30,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-22 21:47:30,323 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:30,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:30,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1803169240, now seen corresponding path program 4 times [2024-11-22 21:47:30,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:30,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174273340] [2024-11-22 21:47:30,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:47:30,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:30,335 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:47:30,335 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:47:30,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:30,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174273340] [2024-11-22 21:47:30,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174273340] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:30,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:30,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:47:30,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651807056] [2024-11-22 21:47:30,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:30,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:47:30,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:30,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:47:30,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:47:30,361 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:30,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 128 transitions, 1323 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 21:47:30,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:30,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:30,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:30,521 INFO L124 PetriNetUnfolderBase]: 564/988 cut-off events. [2024-11-22 21:47:30,521 INFO L125 PetriNetUnfolderBase]: For 4854/4854 co-relation queries the response was YES. [2024-11-22 21:47:30,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5120 conditions, 988 events. 564/988 cut-off events. For 4854/4854 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4519 event pairs, 152 based on Foata normal form. 3/989 useless extension candidates. Maximal degree in co-relation 5026. Up to 667 conditions per place. [2024-11-22 21:47:30,527 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 127 selfloop transitions, 22 changer transitions 3/153 dead transitions. [2024-11-22 21:47:30,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 153 transitions, 1809 flow [2024-11-22 21:47:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:47:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:47:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-11-22 21:47:30,529 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32592592592592595 [2024-11-22 21:47:30,529 INFO L175 Difference]: Start difference. First operand has 105 places, 128 transitions, 1323 flow. Second operand 5 states and 88 transitions. [2024-11-22 21:47:30,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 153 transitions, 1809 flow [2024-11-22 21:47:30,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 153 transitions, 1781 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-22 21:47:30,541 INFO L231 Difference]: Finished difference. Result has 110 places, 130 transitions, 1370 flow [2024-11-22 21:47:30,541 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1370, PETRI_PLACES=110, PETRI_TRANSITIONS=130} [2024-11-22 21:47:30,542 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 56 predicate places. [2024-11-22 21:47:30,542 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 130 transitions, 1370 flow [2024-11-22 21:47:30,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 21:47:30,542 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:30,542 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:30,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-22 21:47:30,542 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:30,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:30,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1508663542, now seen corresponding path program 5 times [2024-11-22 21:47:30,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:30,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557797587] [2024-11-22 21:47:30,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:47:30,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:30,553 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:47:30,554 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:47:30,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:30,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557797587] [2024-11-22 21:47:30,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557797587] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:30,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:30,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:47:30,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047195995] [2024-11-22 21:47:30,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:30,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:47:30,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:30,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:47:30,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:47:30,581 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:30,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 130 transitions, 1370 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 21:47:30,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:30,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:30,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:30,761 INFO L124 PetriNetUnfolderBase]: 567/996 cut-off events. [2024-11-22 21:47:30,761 INFO L125 PetriNetUnfolderBase]: For 5293/5293 co-relation queries the response was YES. [2024-11-22 21:47:30,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5228 conditions, 996 events. 567/996 cut-off events. For 5293/5293 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4559 event pairs, 44 based on Foata normal form. 8/1002 useless extension candidates. Maximal degree in co-relation 5132. Up to 338 conditions per place. [2024-11-22 21:47:30,767 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 121 selfloop transitions, 53 changer transitions 1/176 dead transitions. [2024-11-22 21:47:30,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 176 transitions, 2089 flow [2024-11-22 21:47:30,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:47:30,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:47:30,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-11-22 21:47:30,769 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.30158730158730157 [2024-11-22 21:47:30,769 INFO L175 Difference]: Start difference. First operand has 110 places, 130 transitions, 1370 flow. Second operand 7 states and 114 transitions. [2024-11-22 21:47:30,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 176 transitions, 2089 flow [2024-11-22 21:47:30,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 176 transitions, 2055 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-22 21:47:30,782 INFO L231 Difference]: Finished difference. Result has 115 places, 141 transitions, 1623 flow [2024-11-22 21:47:30,783 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1323, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1623, PETRI_PLACES=115, PETRI_TRANSITIONS=141} [2024-11-22 21:47:30,783 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 61 predicate places. [2024-11-22 21:47:30,783 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 141 transitions, 1623 flow [2024-11-22 21:47:30,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 21:47:30,783 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:30,783 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:30,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-22 21:47:30,784 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:30,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:30,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1110683131, now seen corresponding path program 6 times [2024-11-22 21:47:30,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:30,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525391402] [2024-11-22 21:47:30,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:47:30,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:30,793 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 21:47:30,793 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:47:30,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:30,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525391402] [2024-11-22 21:47:30,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525391402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:30,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:30,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:47:30,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944794874] [2024-11-22 21:47:30,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:30,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:47:30,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:30,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:47:30,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:47:30,832 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-11-22 21:47:30,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 141 transitions, 1623 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 21:47:30,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:30,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-11-22 21:47:30,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:30,962 INFO L124 PetriNetUnfolderBase]: 488/888 cut-off events. [2024-11-22 21:47:30,962 INFO L125 PetriNetUnfolderBase]: For 6388/6388 co-relation queries the response was YES. [2024-11-22 21:47:30,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4986 conditions, 888 events. 488/888 cut-off events. For 6388/6388 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4144 event pairs, 101 based on Foata normal form. 2/885 useless extension candidates. Maximal degree in co-relation 4890. Up to 485 conditions per place. [2024-11-22 21:47:30,968 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 103 selfloop transitions, 26 changer transitions 2/156 dead transitions. [2024-11-22 21:47:30,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 156 transitions, 1985 flow [2024-11-22 21:47:30,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:47:30,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:47:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-11-22 21:47:30,968 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32222222222222224 [2024-11-22 21:47:30,969 INFO L175 Difference]: Start difference. First operand has 115 places, 141 transitions, 1623 flow. Second operand 5 states and 87 transitions. [2024-11-22 21:47:30,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 156 transitions, 1985 flow [2024-11-22 21:47:30,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 156 transitions, 1917 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-11-22 21:47:30,985 INFO L231 Difference]: Finished difference. Result has 117 places, 140 transitions, 1600 flow [2024-11-22 21:47:30,985 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1600, PETRI_PLACES=117, PETRI_TRANSITIONS=140} [2024-11-22 21:47:30,985 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 63 predicate places. [2024-11-22 21:47:30,985 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 140 transitions, 1600 flow [2024-11-22 21:47:30,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 21:47:30,986 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:30,986 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:30,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-22 21:47:30,986 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:30,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:30,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1628346254, now seen corresponding path program 6 times [2024-11-22 21:47:30,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:30,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057035168] [2024-11-22 21:47:30,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:47:30,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:30,997 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 21:47:30,997 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:47:31,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:31,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057035168] [2024-11-22 21:47:31,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057035168] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:31,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:31,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:47:31,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430480283] [2024-11-22 21:47:31,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:31,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:47:31,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:31,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:47:31,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:47:31,036 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-11-22 21:47:31,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 140 transitions, 1600 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 21:47:31,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:31,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-11-22 21:47:31,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:31,233 INFO L124 PetriNetUnfolderBase]: 480/854 cut-off events. [2024-11-22 21:47:31,234 INFO L125 PetriNetUnfolderBase]: For 6386/6404 co-relation queries the response was YES. [2024-11-22 21:47:31,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4755 conditions, 854 events. 480/854 cut-off events. For 6386/6404 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3871 event pairs, 106 based on Foata normal form. 3/854 useless extension candidates. Maximal degree in co-relation 4660. Up to 474 conditions per place. [2024-11-22 21:47:31,242 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 105 selfloop transitions, 25 changer transitions 3/155 dead transitions. [2024-11-22 21:47:31,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 155 transitions, 1953 flow [2024-11-22 21:47:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:47:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:47:31,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-11-22 21:47:31,244 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32222222222222224 [2024-11-22 21:47:31,244 INFO L175 Difference]: Start difference. First operand has 117 places, 140 transitions, 1600 flow. Second operand 5 states and 87 transitions. [2024-11-22 21:47:31,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 155 transitions, 1953 flow [2024-11-22 21:47:31,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 155 transitions, 1868 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-22 21:47:31,262 INFO L231 Difference]: Finished difference. Result has 115 places, 139 transitions, 1561 flow [2024-11-22 21:47:31,263 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1561, PETRI_PLACES=115, PETRI_TRANSITIONS=139} [2024-11-22 21:47:31,263 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 61 predicate places. [2024-11-22 21:47:31,263 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 139 transitions, 1561 flow [2024-11-22 21:47:31,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 21:47:31,264 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:31,264 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:31,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-22 21:47:31,264 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:31,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:31,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1749468371, now seen corresponding path program 1 times [2024-11-22 21:47:31,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:31,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665984570] [2024-11-22 21:47:31,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:31,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:31,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:31,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665984570] [2024-11-22 21:47:31,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665984570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:31,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341168405] [2024-11-22 21:47:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:31,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:31,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:31,699 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 21:47:31,700 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 21:47:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:31,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:47:31,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:31,872 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:31,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2024-11-22 21:47:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:31,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341168405] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:31,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:31,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 16 [2024-11-22 21:47:31,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385292862] [2024-11-22 21:47:31,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:31,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:47:31,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:31,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:47:31,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:47:32,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:32,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 139 transitions, 1561 flow. Second operand has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 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 21:47:32,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:32,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:32,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:32,836 INFO L124 PetriNetUnfolderBase]: 981/1806 cut-off events. [2024-11-22 21:47:32,836 INFO L125 PetriNetUnfolderBase]: For 13308/13370 co-relation queries the response was YES. [2024-11-22 21:47:32,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9526 conditions, 1806 events. 981/1806 cut-off events. For 13308/13370 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10162 event pairs, 86 based on Foata normal form. 58/1855 useless extension candidates. Maximal degree in co-relation 8041. Up to 605 conditions per place. [2024-11-22 21:47:32,845 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 231 selfloop transitions, 28 changer transitions 17/322 dead transitions. [2024-11-22 21:47:32,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 322 transitions, 4074 flow [2024-11-22 21:47:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-22 21:47:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-22 21:47:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 244 transitions. [2024-11-22 21:47:32,847 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.25102880658436216 [2024-11-22 21:47:32,848 INFO L175 Difference]: Start difference. First operand has 115 places, 139 transitions, 1561 flow. Second operand 18 states and 244 transitions. [2024-11-22 21:47:32,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 322 transitions, 4074 flow [2024-11-22 21:47:32,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 322 transitions, 3920 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-22 21:47:32,873 INFO L231 Difference]: Finished difference. Result has 133 places, 155 transitions, 1714 flow [2024-11-22 21:47:32,873 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1509, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1714, PETRI_PLACES=133, PETRI_TRANSITIONS=155} [2024-11-22 21:47:32,874 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 79 predicate places. [2024-11-22 21:47:32,874 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 155 transitions, 1714 flow [2024-11-22 21:47:32,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 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 21:47:32,874 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:32,874 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:32,881 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 21:47:33,074 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,SelfDestructingSolverStorable26 [2024-11-22 21:47:33,074 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:33,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:33,075 INFO L85 PathProgramCache]: Analyzing trace with hash -462574993, now seen corresponding path program 2 times [2024-11-22 21:47:33,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:33,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819830003] [2024-11-22 21:47:33,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:47:33,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:33,100 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:47:33,100 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:33,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:33,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819830003] [2024-11-22 21:47:33,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819830003] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:33,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21616572] [2024-11-22 21:47:33,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:47:33,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:33,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:33,316 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 21:47:33,317 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 21:47:33,390 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:47:33,391 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:33,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 21:47:33,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:33,464 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:33,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2024-11-22 21:47:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:33,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21616572] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:33,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:33,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2024-11-22 21:47:33,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555212823] [2024-11-22 21:47:33,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:33,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:47:33,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:33,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:47:33,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:47:33,659 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-11-22 21:47:33,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 155 transitions, 1714 flow. Second operand has 14 states, 14 states have (on average 13.285714285714286) internal successors, (186), 14 states have internal predecessors, (186), 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 21:47:33,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:33,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-11-22 21:47:33,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:34,217 INFO L124 PetriNetUnfolderBase]: 1986/3607 cut-off events. [2024-11-22 21:47:34,218 INFO L125 PetriNetUnfolderBase]: For 25853/25947 co-relation queries the response was YES. [2024-11-22 21:47:34,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19432 conditions, 3607 events. 1986/3607 cut-off events. For 25853/25947 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 23147 event pairs, 287 based on Foata normal form. 83/3671 useless extension candidates. Maximal degree in co-relation 19375. Up to 1428 conditions per place. [2024-11-22 21:47:34,239 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 189 selfloop transitions, 27 changer transitions 20/282 dead transitions. [2024-11-22 21:47:34,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 282 transitions, 3604 flow [2024-11-22 21:47:34,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 21:47:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-22 21:47:34,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 185 transitions. [2024-11-22 21:47:34,240 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2854938271604938 [2024-11-22 21:47:34,240 INFO L175 Difference]: Start difference. First operand has 133 places, 155 transitions, 1714 flow. Second operand 12 states and 185 transitions. [2024-11-22 21:47:34,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 282 transitions, 3604 flow [2024-11-22 21:47:34,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 282 transitions, 3578 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-22 21:47:34,295 INFO L231 Difference]: Finished difference. Result has 143 places, 160 transitions, 1835 flow [2024-11-22 21:47:34,295 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1835, PETRI_PLACES=143, PETRI_TRANSITIONS=160} [2024-11-22 21:47:34,295 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 89 predicate places. [2024-11-22 21:47:34,295 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 160 transitions, 1835 flow [2024-11-22 21:47:34,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.285714285714286) internal successors, (186), 14 states have internal predecessors, (186), 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 21:47:34,296 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:34,296 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:34,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-22 21:47:34,496 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,SelfDestructingSolverStorable27 [2024-11-22 21:47:34,497 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:34,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:34,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1274237479, now seen corresponding path program 3 times [2024-11-22 21:47:34,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:34,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355267212] [2024-11-22 21:47:34,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:47:34,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:34,520 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:47:34,520 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:47:34,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:34,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355267212] [2024-11-22 21:47:34,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355267212] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:34,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964172905] [2024-11-22 21:47:34,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:47:34,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:34,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:34,705 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 21:47:34,706 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 21:47:34,791 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:47:34,791 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:34,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-22 21:47:34,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:34,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-22 21:47:35,036 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-22 21:47:35,036 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2024-11-22 21:47:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:47:35,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:35,258 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:47:35,258 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 341 treesize of output 327 [2024-11-22 21:47:35,278 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 92 treesize of output 62 [2024-11-22 21:47:35,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:47:35,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 455 treesize of output 419 [2024-11-22 21:47:40,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:47:40,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964172905] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:40,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:40,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-22 21:47:40,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034512599] [2024-11-22 21:47:40,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:40,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:47:40,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:40,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:47:40,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:47:41,062 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-11-22 21:47:41,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 160 transitions, 1835 flow. Second operand has 17 states, 17 states have (on average 13.411764705882353) internal successors, (228), 17 states have internal predecessors, (228), 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 21:47:41,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:41,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-11-22 21:47:41,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:41,653 INFO L124 PetriNetUnfolderBase]: 2182/3994 cut-off events. [2024-11-22 21:47:41,653 INFO L125 PetriNetUnfolderBase]: For 28997/29159 co-relation queries the response was YES. [2024-11-22 21:47:41,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21551 conditions, 3994 events. 2182/3994 cut-off events. For 28997/29159 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 25965 event pairs, 167 based on Foata normal form. 130/4107 useless extension candidates. Maximal degree in co-relation 21483. Up to 1763 conditions per place. [2024-11-22 21:47:41,681 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 201 selfloop transitions, 29 changer transitions 66/342 dead transitions. [2024-11-22 21:47:41,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 342 transitions, 4451 flow [2024-11-22 21:47:41,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:47:41,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:47:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-11-22 21:47:41,682 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3351851851851852 [2024-11-22 21:47:41,682 INFO L175 Difference]: Start difference. First operand has 143 places, 160 transitions, 1835 flow. Second operand 10 states and 181 transitions. [2024-11-22 21:47:41,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 342 transitions, 4451 flow [2024-11-22 21:47:41,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 342 transitions, 4402 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-11-22 21:47:41,756 INFO L231 Difference]: Finished difference. Result has 148 places, 173 transitions, 2041 flow [2024-11-22 21:47:41,757 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2041, PETRI_PLACES=148, PETRI_TRANSITIONS=173} [2024-11-22 21:47:41,757 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 94 predicate places. [2024-11-22 21:47:41,757 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 173 transitions, 2041 flow [2024-11-22 21:47:41,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.411764705882353) internal successors, (228), 17 states have internal predecessors, (228), 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 21:47:41,757 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:41,758 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:41,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-22 21:47:41,958 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,SelfDestructingSolverStorable28 [2024-11-22 21:47:41,958 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:41,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:41,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1194246082, now seen corresponding path program 4 times [2024-11-22 21:47:41,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:41,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951328490] [2024-11-22 21:47:41,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:47:41,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:41,979 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:47:41,979 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 21:47:42,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:42,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951328490] [2024-11-22 21:47:42,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951328490] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:42,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:42,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:47:42,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974742760] [2024-11-22 21:47:42,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:42,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:47:42,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:42,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:47:42,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:47:42,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-11-22 21:47:42,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 173 transitions, 2041 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 21:47:42,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:42,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-11-22 21:47:42,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:42,591 INFO L124 PetriNetUnfolderBase]: 2510/4613 cut-off events. [2024-11-22 21:47:42,592 INFO L125 PetriNetUnfolderBase]: For 35595/35760 co-relation queries the response was YES. [2024-11-22 21:47:42,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25538 conditions, 4613 events. 2510/4613 cut-off events. For 35595/35760 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 30617 event pairs, 229 based on Foata normal form. 147/4734 useless extension candidates. Maximal degree in co-relation 25469. Up to 2786 conditions per place. [2024-11-22 21:47:42,630 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 183 selfloop transitions, 21 changer transitions 1/251 dead transitions. [2024-11-22 21:47:42,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 251 transitions, 3306 flow [2024-11-22 21:47:42,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:47:42,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:47:42,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2024-11-22 21:47:42,631 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-11-22 21:47:42,631 INFO L175 Difference]: Start difference. First operand has 148 places, 173 transitions, 2041 flow. Second operand 4 states and 87 transitions. [2024-11-22 21:47:42,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 251 transitions, 3306 flow [2024-11-22 21:47:42,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 251 transitions, 3260 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-22 21:47:42,718 INFO L231 Difference]: Finished difference. Result has 148 places, 185 transitions, 2238 flow [2024-11-22 21:47:42,718 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2238, PETRI_PLACES=148, PETRI_TRANSITIONS=185} [2024-11-22 21:47:42,718 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 94 predicate places. [2024-11-22 21:47:42,719 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 185 transitions, 2238 flow [2024-11-22 21:47:42,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 21:47:42,719 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:42,719 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:42,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-22 21:47:42,719 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:42,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:42,720 INFO L85 PathProgramCache]: Analyzing trace with hash 900787881, now seen corresponding path program 5 times [2024-11-22 21:47:42,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:42,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858367239] [2024-11-22 21:47:42,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:47:42,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:42,750 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-22 21:47:42,750 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:47:42,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:42,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858367239] [2024-11-22 21:47:42,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858367239] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:42,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867450783] [2024-11-22 21:47:42,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:47:42,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:42,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:42,822 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 21:47:42,826 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 21:47:42,918 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-22 21:47:42,918 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:42,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:47:42,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:47:42,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:47:43,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867450783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:43,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:43,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-22 21:47:43,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173803157] [2024-11-22 21:47:43,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:43,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:47:43,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:43,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:47:43,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:47:43,005 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:43,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 185 transitions, 2238 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 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 21:47:43,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:43,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:43,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:44,073 INFO L124 PetriNetUnfolderBase]: 5093/8470 cut-off events. [2024-11-22 21:47:44,073 INFO L125 PetriNetUnfolderBase]: For 61945/61945 co-relation queries the response was YES. [2024-11-22 21:47:44,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48044 conditions, 8470 events. 5093/8470 cut-off events. For 61945/61945 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 54299 event pairs, 215 based on Foata normal form. 297/8766 useless extension candidates. Maximal degree in co-relation 47976. Up to 1804 conditions per place. [2024-11-22 21:47:44,118 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 363 selfloop transitions, 106 changer transitions 23/493 dead transitions. [2024-11-22 21:47:44,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 493 transitions, 6924 flow [2024-11-22 21:47:44,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-22 21:47:44,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-22 21:47:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 320 transitions. [2024-11-22 21:47:44,120 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2821869488536155 [2024-11-22 21:47:44,120 INFO L175 Difference]: Start difference. First operand has 148 places, 185 transitions, 2238 flow. Second operand 21 states and 320 transitions. [2024-11-22 21:47:44,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 493 transitions, 6924 flow [2024-11-22 21:47:44,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 493 transitions, 6854 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-11-22 21:47:44,275 INFO L231 Difference]: Finished difference. Result has 183 places, 233 transitions, 3110 flow [2024-11-22 21:47:44,275 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2218, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3110, PETRI_PLACES=183, PETRI_TRANSITIONS=233} [2024-11-22 21:47:44,276 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 129 predicate places. [2024-11-22 21:47:44,276 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 233 transitions, 3110 flow [2024-11-22 21:47:44,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 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 21:47:44,276 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:44,276 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:44,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-22 21:47:44,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-22 21:47:44,481 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:44,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:44,481 INFO L85 PathProgramCache]: Analyzing trace with hash 268587989, now seen corresponding path program 6 times [2024-11-22 21:47:44,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:44,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844938640] [2024-11-22 21:47:44,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:47:44,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:44,501 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 21:47:44,501 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:44,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:47:44,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:44,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844938640] [2024-11-22 21:47:44,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844938640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:44,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086897141] [2024-11-22 21:47:44,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:47:44,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:44,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:44,571 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 21:47:44,572 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 21:47:44,657 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 21:47:44,657 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:44,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:47:44,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:47:44,698 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:47:44,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086897141] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:44,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:44,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-22 21:47:44,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957076975] [2024-11-22 21:47:44,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:44,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:47:44,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:44,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:47:44,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:47:44,751 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:44,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 233 transitions, 3110 flow. Second operand has 11 states, 11 states have (on average 12.090909090909092) internal successors, (133), 11 states have internal predecessors, (133), 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 21:47:44,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:44,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:44,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:46,720 INFO L124 PetriNetUnfolderBase]: 6631/11011 cut-off events. [2024-11-22 21:47:46,720 INFO L125 PetriNetUnfolderBase]: For 135392/135392 co-relation queries the response was YES. [2024-11-22 21:47:46,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73564 conditions, 11011 events. 6631/11011 cut-off events. For 135392/135392 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 73525 event pairs, 291 based on Foata normal form. 70/11080 useless extension candidates. Maximal degree in co-relation 73481. Up to 2518 conditions per place. [2024-11-22 21:47:46,788 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 295 selfloop transitions, 176 changer transitions 18/490 dead transitions. [2024-11-22 21:47:46,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 490 transitions, 7327 flow [2024-11-22 21:47:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-22 21:47:46,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-22 21:47:46,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 229 transitions. [2024-11-22 21:47:46,789 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28271604938271605 [2024-11-22 21:47:46,789 INFO L175 Difference]: Start difference. First operand has 183 places, 233 transitions, 3110 flow. Second operand 15 states and 229 transitions. [2024-11-22 21:47:46,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 490 transitions, 7327 flow [2024-11-22 21:47:47,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 490 transitions, 7076 flow, removed 94 selfloop flow, removed 2 redundant places. [2024-11-22 21:47:47,386 INFO L231 Difference]: Finished difference. Result has 201 places, 315 transitions, 4623 flow [2024-11-22 21:47:47,386 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3002, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4623, PETRI_PLACES=201, PETRI_TRANSITIONS=315} [2024-11-22 21:47:47,387 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 147 predicate places. [2024-11-22 21:47:47,387 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 315 transitions, 4623 flow [2024-11-22 21:47:47,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.090909090909092) internal successors, (133), 11 states have internal predecessors, (133), 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 21:47:47,387 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:47,387 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:47,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-22 21:47:47,587 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,SelfDestructingSolverStorable31 [2024-11-22 21:47:47,588 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:47,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:47,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2134123255, now seen corresponding path program 7 times [2024-11-22 21:47:47,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:47,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966523333] [2024-11-22 21:47:47,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:47:47,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:47:47,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:47,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966523333] [2024-11-22 21:47:47,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966523333] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:47,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578268347] [2024-11-22 21:47:47,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:47:47,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:47,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:47,661 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 21:47:47,662 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 21:47:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:47,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:47:47,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:47:47,790 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:47:47,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578268347] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:47,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:47,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-22 21:47:47,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807563341] [2024-11-22 21:47:47,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:47,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:47:47,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:47,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:47:47,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:47:47,835 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:47,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 315 transitions, 4623 flow. Second operand has 13 states, 13 states have (on average 11.538461538461538) internal successors, (150), 13 states have internal predecessors, (150), 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 21:47:47,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:47,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:47,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:50,330 INFO L124 PetriNetUnfolderBase]: 8542/14173 cut-off events. [2024-11-22 21:47:50,330 INFO L125 PetriNetUnfolderBase]: For 215720/215720 co-relation queries the response was YES. [2024-11-22 21:47:50,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101639 conditions, 14173 events. 8542/14173 cut-off events. For 215720/215720 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 97795 event pairs, 384 based on Foata normal form. 126/14298 useless extension candidates. Maximal degree in co-relation 101549. Up to 3671 conditions per place. [2024-11-22 21:47:50,435 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 317 selfloop transitions, 248 changer transitions 15/581 dead transitions. [2024-11-22 21:47:50,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 581 transitions, 9265 flow [2024-11-22 21:47:50,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 21:47:50,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-22 21:47:50,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 250 transitions. [2024-11-22 21:47:50,436 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28935185185185186 [2024-11-22 21:47:50,436 INFO L175 Difference]: Start difference. First operand has 201 places, 315 transitions, 4623 flow. Second operand 16 states and 250 transitions. [2024-11-22 21:47:50,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 581 transitions, 9265 flow [2024-11-22 21:47:51,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 581 transitions, 9223 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-11-22 21:47:51,930 INFO L231 Difference]: Finished difference. Result has 226 places, 399 transitions, 6765 flow [2024-11-22 21:47:51,930 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4593, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6765, PETRI_PLACES=226, PETRI_TRANSITIONS=399} [2024-11-22 21:47:51,930 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 172 predicate places. [2024-11-22 21:47:51,930 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 399 transitions, 6765 flow [2024-11-22 21:47:51,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.538461538461538) internal successors, (150), 13 states have internal predecessors, (150), 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 21:47:51,930 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:51,931 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:51,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-22 21:47:52,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-22 21:47:52,131 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:52,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:52,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1842964807, now seen corresponding path program 8 times [2024-11-22 21:47:52,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:52,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325611087] [2024-11-22 21:47:52,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:47:52,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:52,150 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:47:52,150 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:47:52,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:52,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325611087] [2024-11-22 21:47:52,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325611087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:52,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027197841] [2024-11-22 21:47:52,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:47:52,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:52,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:52,211 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:47:52,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 21:47:52,300 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:47:52,300 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:52,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:47:52,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:47:52,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:47:52,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027197841] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:52,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:52,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-22 21:47:52,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856390841] [2024-11-22 21:47:52,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:52,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 21:47:52,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:52,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 21:47:52,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:47:52,397 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:52,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 399 transitions, 6765 flow. Second operand has 12 states, 12 states have (on average 11.75) internal successors, (141), 12 states have internal predecessors, (141), 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 21:47:52,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:52,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:52,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:55,805 INFO L124 PetriNetUnfolderBase]: 10312/17119 cut-off events. [2024-11-22 21:47:55,805 INFO L125 PetriNetUnfolderBase]: For 370046/370046 co-relation queries the response was YES. [2024-11-22 21:47:55,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137795 conditions, 17119 events. 10312/17119 cut-off events. For 370046/370046 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 121706 event pairs, 373 based on Foata normal form. 102/17220 useless extension candidates. Maximal degree in co-relation 137695. Up to 3033 conditions per place. [2024-11-22 21:47:55,937 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 450 selfloop transitions, 321 changer transitions 15/787 dead transitions. [2024-11-22 21:47:55,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 787 transitions, 13934 flow [2024-11-22 21:47:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-22 21:47:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-22 21:47:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 393 transitions. [2024-11-22 21:47:55,939 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2799145299145299 [2024-11-22 21:47:55,939 INFO L175 Difference]: Start difference. First operand has 226 places, 399 transitions, 6765 flow. Second operand 26 states and 393 transitions. [2024-11-22 21:47:55,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 787 transitions, 13934 flow [2024-11-22 21:47:59,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 787 transitions, 13898 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-11-22 21:47:59,276 INFO L231 Difference]: Finished difference. Result has 263 places, 486 transitions, 9553 flow [2024-11-22 21:47:59,277 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=6731, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9553, PETRI_PLACES=263, PETRI_TRANSITIONS=486} [2024-11-22 21:47:59,277 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 209 predicate places. [2024-11-22 21:47:59,277 INFO L471 AbstractCegarLoop]: Abstraction has has 263 places, 486 transitions, 9553 flow [2024-11-22 21:47:59,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.75) internal successors, (141), 12 states have internal predecessors, (141), 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 21:47:59,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:59,277 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:59,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-22 21:47:59,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:59,478 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:47:59,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:59,478 INFO L85 PathProgramCache]: Analyzing trace with hash -91033195, now seen corresponding path program 9 times [2024-11-22 21:47:59,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:59,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767769510] [2024-11-22 21:47:59,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:47:59,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:59,500 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 21:47:59,500 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:47:59,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:59,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767769510] [2024-11-22 21:47:59,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767769510] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:59,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383322732] [2024-11-22 21:47:59,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:47:59,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:59,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:59,561 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:47:59,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 21:47:59,654 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 21:47:59,654 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:59,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:47:59,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:47:59,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:47:59,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383322732] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:59,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:59,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-22 21:47:59,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305639034] [2024-11-22 21:47:59,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:59,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 21:47:59,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:59,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 21:47:59,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:47:59,734 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:47:59,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 486 transitions, 9553 flow. Second operand has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 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 21:47:59,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:59,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:47:59,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:03,572 INFO L124 PetriNetUnfolderBase]: 10346/17221 cut-off events. [2024-11-22 21:48:03,572 INFO L125 PetriNetUnfolderBase]: For 486513/486513 co-relation queries the response was YES. [2024-11-22 21:48:03,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154786 conditions, 17221 events. 10346/17221 cut-off events. For 486513/486513 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 123684 event pairs, 1094 based on Foata normal form. 38/17258 useless extension candidates. Maximal degree in co-relation 154674. Up to 4892 conditions per place. [2024-11-22 21:48:03,737 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 472 selfloop transitions, 206 changer transitions 14/693 dead transitions. [2024-11-22 21:48:03,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 693 transitions, 13785 flow [2024-11-22 21:48:03,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-22 21:48:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-22 21:48:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 213 transitions. [2024-11-22 21:48:03,738 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3034188034188034 [2024-11-22 21:48:03,738 INFO L175 Difference]: Start difference. First operand has 263 places, 486 transitions, 9553 flow. Second operand 13 states and 213 transitions. [2024-11-22 21:48:03,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 693 transitions, 13785 flow [2024-11-22 21:48:08,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 693 transitions, 13223 flow, removed 211 selfloop flow, removed 8 redundant places. [2024-11-22 21:48:08,633 INFO L231 Difference]: Finished difference. Result has 269 places, 485 transitions, 9405 flow [2024-11-22 21:48:08,634 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=8991, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9405, PETRI_PLACES=269, PETRI_TRANSITIONS=485} [2024-11-22 21:48:08,634 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 215 predicate places. [2024-11-22 21:48:08,634 INFO L471 AbstractCegarLoop]: Abstraction has has 269 places, 485 transitions, 9405 flow [2024-11-22 21:48:08,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 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 21:48:08,634 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:08,634 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:08,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-22 21:48:08,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:08,835 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:48:08,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:08,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1246708917, now seen corresponding path program 10 times [2024-11-22 21:48:08,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:08,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307146779] [2024-11-22 21:48:08,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:48:08,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:08,845 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:48:08,846 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:48:08,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:08,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307146779] [2024-11-22 21:48:08,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307146779] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:08,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755026068] [2024-11-22 21:48:08,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:48:08,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:08,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:08,887 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:08,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-22 21:48:08,957 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:48:08,958 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:08,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:48:08,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:48:09,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:48:09,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755026068] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:09,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:09,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2024-11-22 21:48:09,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292011912] [2024-11-22 21:48:09,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:09,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:48:09,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:09,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:48:09,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:48:09,033 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:48:09,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 485 transitions, 9405 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 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 21:48:09,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:09,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:48:09,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:13,292 INFO L124 PetriNetUnfolderBase]: 12244/20136 cut-off events. [2024-11-22 21:48:13,292 INFO L125 PetriNetUnfolderBase]: For 527511/527511 co-relation queries the response was YES. [2024-11-22 21:48:13,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179108 conditions, 20136 events. 12244/20136 cut-off events. For 527511/527511 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 145267 event pairs, 633 based on Foata normal form. 136/20271 useless extension candidates. Maximal degree in co-relation 178996. Up to 4033 conditions per place. [2024-11-22 21:48:13,563 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 445 selfloop transitions, 393 changer transitions 15/854 dead transitions. [2024-11-22 21:48:13,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 854 transitions, 16841 flow [2024-11-22 21:48:13,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-22 21:48:13,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-22 21:48:13,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 301 transitions. [2024-11-22 21:48:13,564 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.27870370370370373 [2024-11-22 21:48:13,565 INFO L175 Difference]: Start difference. First operand has 269 places, 485 transitions, 9405 flow. Second operand 20 states and 301 transitions. [2024-11-22 21:48:13,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 854 transitions, 16841 flow [2024-11-22 21:48:20,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 854 transitions, 16425 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-11-22 21:48:20,567 INFO L231 Difference]: Finished difference. Result has 289 places, 574 transitions, 12462 flow [2024-11-22 21:48:20,568 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=9028, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12462, PETRI_PLACES=289, PETRI_TRANSITIONS=574} [2024-11-22 21:48:20,568 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 235 predicate places. [2024-11-22 21:48:20,568 INFO L471 AbstractCegarLoop]: Abstraction has has 289 places, 574 transitions, 12462 flow [2024-11-22 21:48:20,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 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 21:48:20,568 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:20,568 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:20,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-22 21:48:20,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-22 21:48:20,769 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:48:20,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:20,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1802673033, now seen corresponding path program 11 times [2024-11-22 21:48:20,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:20,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616967772] [2024-11-22 21:48:20,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:48:20,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:20,798 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-22 21:48:20,798 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:48:20,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:20,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616967772] [2024-11-22 21:48:20,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616967772] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:20,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569287354] [2024-11-22 21:48:20,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:48:20,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:20,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:20,845 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:20,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-22 21:48:20,935 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-22 21:48:20,935 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:20,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:48:20,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:48:20,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:48:20,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569287354] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:20,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:20,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-22 21:48:20,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597663301] [2024-11-22 21:48:20,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:20,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:48:20,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:20,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:48:20,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:48:20,990 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:48:20,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 574 transitions, 12462 flow. Second operand has 11 states, 11 states have (on average 11.090909090909092) internal successors, (122), 11 states have internal predecessors, (122), 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 21:48:20,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:20,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:48:20,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:26,608 INFO L124 PetriNetUnfolderBase]: 13502/22102 cut-off events. [2024-11-22 21:48:26,608 INFO L125 PetriNetUnfolderBase]: For 736893/736893 co-relation queries the response was YES. [2024-11-22 21:48:26,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214796 conditions, 22102 events. 13502/22102 cut-off events. For 736893/736893 co-relation queries the response was YES. Maximal size of possible extension queue 929. Compared 161315 event pairs, 1300 based on Foata normal form. 48/22149 useless extension candidates. Maximal degree in co-relation 214674. Up to 5861 conditions per place. [2024-11-22 21:48:26,834 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 540 selfloop transitions, 245 changer transitions 27/813 dead transitions. [2024-11-22 21:48:26,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 813 transitions, 17767 flow [2024-11-22 21:48:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-22 21:48:26,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-22 21:48:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 198 transitions. [2024-11-22 21:48:26,835 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28205128205128205 [2024-11-22 21:48:26,835 INFO L175 Difference]: Start difference. First operand has 289 places, 574 transitions, 12462 flow. Second operand 13 states and 198 transitions. [2024-11-22 21:48:26,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 813 transitions, 17767 flow [2024-11-22 21:48:39,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 813 transitions, 17242 flow, removed 227 selfloop flow, removed 4 redundant places. [2024-11-22 21:48:39,778 INFO L231 Difference]: Finished difference. Result has 304 places, 591 transitions, 13098 flow [2024-11-22 21:48:39,778 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=12069, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13098, PETRI_PLACES=304, PETRI_TRANSITIONS=591} [2024-11-22 21:48:39,778 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 250 predicate places. [2024-11-22 21:48:39,779 INFO L471 AbstractCegarLoop]: Abstraction has has 304 places, 591 transitions, 13098 flow [2024-11-22 21:48:39,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.090909090909092) internal successors, (122), 11 states have internal predecessors, (122), 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 21:48:39,779 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:39,779 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:39,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-22 21:48:39,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-22 21:48:39,979 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-22 21:48:39,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:39,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1684767464, now seen corresponding path program 12 times [2024-11-22 21:48:39,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:39,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220452195] [2024-11-22 21:48:39,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:48:39,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:39,996 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 21:48:39,996 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:48:40,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:40,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220452195] [2024-11-22 21:48:40,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220452195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:40,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596721051] [2024-11-22 21:48:40,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:48:40,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:40,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:40,072 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:40,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-22 21:48:40,158 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 21:48:40,158 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:40,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:48:40,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:48:40,197 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:48:40,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596721051] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:40,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:40,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-22 21:48:40,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388584040] [2024-11-22 21:48:40,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:40,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 21:48:40,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:40,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 21:48:40,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-11-22 21:48:40,226 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-22 21:48:40,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 591 transitions, 13098 flow. Second operand has 15 states, 15 states have (on average 11.2) internal successors, (168), 15 states have internal predecessors, (168), 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 21:48:40,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:40,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-22 21:48:40,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:47,024 INFO L124 PetriNetUnfolderBase]: 15845/25947 cut-off events. [2024-11-22 21:48:47,024 INFO L125 PetriNetUnfolderBase]: For 904037/904037 co-relation queries the response was YES. [2024-11-22 21:48:47,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254140 conditions, 25947 events. 15845/25947 cut-off events. For 904037/904037 co-relation queries the response was YES. Maximal size of possible extension queue 1081. Compared 193583 event pairs, 2649 based on Foata normal form. 584/26530 useless extension candidates. Maximal degree in co-relation 254010. Up to 11008 conditions per place. [2024-11-22 21:48:47,371 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 792 selfloop transitions, 181 changer transitions 10/984 dead transitions. [2024-11-22 21:48:47,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 984 transitions, 21615 flow [2024-11-22 21:48:47,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-22 21:48:47,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-22 21:48:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 310 transitions. [2024-11-22 21:48:47,373 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28703703703703703 [2024-11-22 21:48:47,373 INFO L175 Difference]: Start difference. First operand has 304 places, 591 transitions, 13098 flow. Second operand 20 states and 310 transitions. [2024-11-22 21:48:47,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 984 transitions, 21615 flow