./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/test-context1.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 d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:56:49,369 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:56:49,452 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:56:49,456 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:56:49,456 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:56:49,486 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:56:49,487 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:56:49,487 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:56:49,488 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:56:49,491 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:56:49,492 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:56:49,492 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:56:49,492 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:56:49,493 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:56:49,493 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:56:49,493 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:56:49,493 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:56:49,493 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:56:49,494 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:56:49,494 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:56:49,496 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:56:49,497 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:56:49,497 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:56:49,497 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:56:49,498 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:56:49,498 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:56:49,498 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:56:49,498 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:56:49,498 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:56:49,499 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:56:49,499 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:56:49,499 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:56:49,499 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:56:49,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:56:49,500 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:56:49,500 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:56:49,500 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:56:49,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:56:49,501 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:56:49,502 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:56:49,502 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:56:49,502 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:56:49,502 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e [2024-11-09 10:56:49,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:56:49,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:56:49,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:56:49,776 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:56:49,777 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:56:49,778 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-context1.wvr.c [2024-11-09 10:56:51,165 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:56:51,362 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:56:51,362 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c [2024-11-09 10:56:51,372 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74fdc8cc1/3d720083d6f74b9cba7fb897644b4673/FLAG41a553420 [2024-11-09 10:56:51,386 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74fdc8cc1/3d720083d6f74b9cba7fb897644b4673 [2024-11-09 10:56:51,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:56:51,391 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:56:51,392 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:56:51,392 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:56:51,397 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:56:51,397 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:56:51" (1/1) ... [2024-11-09 10:56:51,398 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@240dc1b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:51, skipping insertion in model container [2024-11-09 10:56:51,398 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:56:51" (1/1) ... [2024-11-09 10:56:51,419 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:56:51,635 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:56:51,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:56:51,648 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:56:51,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:56:51,686 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:56:51,686 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:51 WrapperNode [2024-11-09 10:56:51,687 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:56:51,688 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:56:51,688 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:56:51,688 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:56:51,695 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:51" (1/1) ... [2024-11-09 10:56:51,703 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:51" (1/1) ... [2024-11-09 10:56:51,727 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 129 [2024-11-09 10:56:51,727 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:56:51,728 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:56:51,728 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:56:51,729 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:56:51,740 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:51" (1/1) ... [2024-11-09 10:56:51,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:51" (1/1) ... [2024-11-09 10:56:51,743 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:51" (1/1) ... [2024-11-09 10:56:51,757 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-09 10:56:51,757 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:51" (1/1) ... [2024-11-09 10:56:51,758 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:51" (1/1) ... [2024-11-09 10:56:51,767 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:51" (1/1) ... [2024-11-09 10:56:51,771 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:51" (1/1) ... [2024-11-09 10:56:51,773 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:51" (1/1) ... [2024-11-09 10:56:51,774 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:51" (1/1) ... [2024-11-09 10:56:51,777 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:56:51,778 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:56:51,778 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:56:51,778 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:56:51,779 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:51" (1/1) ... [2024-11-09 10:56:51,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:56:51,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:51,818 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 10:56:51,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 10:56:51,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:56:51,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:56:51,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:56:51,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:56:51,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:56:51,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:56:51,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:56:51,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:56:51,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:56:51,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 10:56:51,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 10:56:51,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:56:51,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:56:51,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:56:51,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:56:51,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:56:51,865 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:56:51,956 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:56:51,958 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:56:52,201 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:56:52,201 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:56:52,488 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:56:52,489 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 10:56:52,493 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:56:52 BoogieIcfgContainer [2024-11-09 10:56:52,493 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:56:52,496 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:56:52,496 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:56:52,501 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:56:52,501 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:56:51" (1/3) ... [2024-11-09 10:56:52,501 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5870de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:56:52, skipping insertion in model container [2024-11-09 10:56:52,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:51" (2/3) ... [2024-11-09 10:56:52,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5870de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:56:52, skipping insertion in model container [2024-11-09 10:56:52,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:56:52" (3/3) ... [2024-11-09 10:56:52,504 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2024-11-09 10:56:52,544 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:56:52,545 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2024-11-09 10:56:52,545 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:56:52,597 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-09 10:56:52,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 37 transitions, 88 flow [2024-11-09 10:56:52,660 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2024-11-09 10:56:52,660 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:56:52,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 5/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 54 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-09 10:56:52,664 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 37 transitions, 88 flow [2024-11-09 10:56:52,669 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 34 transitions, 80 flow [2024-11-09 10:56:52,682 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:56:52,691 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;@13422f82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:56:52,692 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-11-09 10:56:52,698 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:56:52,699 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:56:52,699 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:56:52,700 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:52,700 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:56:52,701 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:56:52,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:52,707 INFO L85 PathProgramCache]: Analyzing trace with hash 422978, now seen corresponding path program 1 times [2024-11-09 10:56:52,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:52,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997977047] [2024-11-09 10:56:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:52,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:52,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:52,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:52,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997977047] [2024-11-09 10:56:52,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997977047] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:52,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:52,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:56:52,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408660927] [2024-11-09 10:56:52,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:53,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:56:53,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:53,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:56:53,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:56:53,040 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-11-09 10:56:53,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:53,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:53,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-11-09 10:56:53,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:53,186 INFO L124 PetriNetUnfolderBase]: 212/371 cut-off events. [2024-11-09 10:56:53,187 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-09 10:56:53,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 371 events. 212/371 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1447 event pairs, 176 based on Foata normal form. 1/266 useless extension candidates. Maximal degree in co-relation 705. Up to 364 conditions per place. [2024-11-09 10:56:53,197 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 23 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2024-11-09 10:56:53,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 120 flow [2024-11-09 10:56:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:56:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:56:53,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-11-09 10:56:53,209 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45045045045045046 [2024-11-09 10:56:53,211 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 80 flow. Second operand 3 states and 50 transitions. [2024-11-09 10:56:53,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 120 flow [2024-11-09 10:56:53,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:56:53,217 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 66 flow [2024-11-09 10:56:53,219 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-11-09 10:56:53,223 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2024-11-09 10:56:53,224 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 66 flow [2024-11-09 10:56:53,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:53,225 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:53,225 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:56:53,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:56:53,226 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:56:53,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:53,227 INFO L85 PathProgramCache]: Analyzing trace with hash 422979, now seen corresponding path program 1 times [2024-11-09 10:56:53,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:53,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060431085] [2024-11-09 10:56:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:53,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:53,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:53,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060431085] [2024-11-09 10:56:53,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060431085] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:53,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:53,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:56:53,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919068756] [2024-11-09 10:56:53,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:53,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:56:53,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:53,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:56:53,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:56:53,524 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-11-09 10:56:53,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:53,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:53,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-11-09 10:56:53,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:53,707 INFO L124 PetriNetUnfolderBase]: 212/370 cut-off events. [2024-11-09 10:56:53,707 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-09 10:56:53,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 370 events. 212/370 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1448 event pairs, 176 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 737. Up to 364 conditions per place. [2024-11-09 10:56:53,712 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 21 selfloop transitions, 4 changer transitions 0/28 dead transitions. [2024-11-09 10:56:53,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 28 transitions, 114 flow [2024-11-09 10:56:53,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:56:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:56:53,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 54 transitions. [2024-11-09 10:56:53,715 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36486486486486486 [2024-11-09 10:56:53,715 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 66 flow. Second operand 4 states and 54 transitions. [2024-11-09 10:56:53,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 28 transitions, 114 flow [2024-11-09 10:56:53,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 28 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:56:53,718 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 68 flow [2024-11-09 10:56:53,718 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2024-11-09 10:56:53,719 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2024-11-09 10:56:53,719 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 68 flow [2024-11-09 10:56:53,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:53,719 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:53,720 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:53,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:56:53,720 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:56:53,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:53,721 INFO L85 PathProgramCache]: Analyzing trace with hash -140644634, now seen corresponding path program 1 times [2024-11-09 10:56:53,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:53,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163921969] [2024-11-09 10:56:53,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:53,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:53,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:53,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163921969] [2024-11-09 10:56:53,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163921969] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:53,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:53,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:56:53,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756848990] [2024-11-09 10:56:53,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:53,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:56:53,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:53,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:56:53,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:56:53,849 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:56:53,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:53,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:53,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:56:53,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:54,009 INFO L124 PetriNetUnfolderBase]: 280/512 cut-off events. [2024-11-09 10:56:54,010 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-09 10:56:54,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 512 events. 280/512 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2239 event pairs, 244 based on Foata normal form. 23/405 useless extension candidates. Maximal degree in co-relation 737. Up to 367 conditions per place. [2024-11-09 10:56:54,014 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 38 selfloop transitions, 3 changer transitions 2/46 dead transitions. [2024-11-09 10:56:54,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 46 transitions, 200 flow [2024-11-09 10:56:54,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:56:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:56:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2024-11-09 10:56:54,016 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5472972972972973 [2024-11-09 10:56:54,016 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 68 flow. Second operand 4 states and 81 transitions. [2024-11-09 10:56:54,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 46 transitions, 200 flow [2024-11-09 10:56:54,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 186 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:56:54,018 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 90 flow [2024-11-09 10:56:54,019 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-11-09 10:56:54,021 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2024-11-09 10:56:54,021 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 90 flow [2024-11-09 10:56:54,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:54,021 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:54,021 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:54,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:56:54,022 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:56:54,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:54,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1245319039, now seen corresponding path program 1 times [2024-11-09 10:56:54,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:54,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812502263] [2024-11-09 10:56:54,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:54,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:54,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:54,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:54,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812502263] [2024-11-09 10:56:54,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812502263] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:54,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836935298] [2024-11-09 10:56:54,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:54,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:54,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:54,281 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:56:54,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:56:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:54,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:56:54,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:54,539 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:54,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-11-09 10:56:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:54,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836935298] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:54,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:54,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:56:54,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191782640] [2024-11-09 10:56:54,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:54,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:56:54,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:54,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:56:54,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:56:54,750 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:56:54,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 90 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) [2024-11-09 10:56:54,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:54,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:56:54,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:55,087 INFO L124 PetriNetUnfolderBase]: 352/649 cut-off events. [2024-11-09 10:56:55,087 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-09 10:56:55,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1443 conditions, 649 events. 352/649 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2893 event pairs, 307 based on Foata normal form. 13/501 useless extension candidates. Maximal degree in co-relation 1145. Up to 472 conditions per place. [2024-11-09 10:56:55,095 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 40 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2024-11-09 10:56:55,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 48 transitions, 224 flow [2024-11-09 10:56:55,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:56:55,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:56:55,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-11-09 10:56:55,098 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4810810810810811 [2024-11-09 10:56:55,099 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 90 flow. Second operand 5 states and 89 transitions. [2024-11-09 10:56:55,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 48 transitions, 224 flow [2024-11-09 10:56:55,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 48 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:56:55,103 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 114 flow [2024-11-09 10:56:55,103 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-11-09 10:56:55,104 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2024-11-09 10:56:55,104 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 114 flow [2024-11-09 10:56:55,104 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) [2024-11-09 10:56:55,105 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:55,105 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:55,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 10:56:55,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:55,310 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:56:55,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:55,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1245319038, now seen corresponding path program 1 times [2024-11-09 10:56:55,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:55,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339602929] [2024-11-09 10:56:55,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:55,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:55,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:55,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339602929] [2024-11-09 10:56:55,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339602929] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:55,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:55,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:56:55,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135908708] [2024-11-09 10:56:55,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:55,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:56:55,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:55,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:56:55,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:56:55,381 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-11-09 10:56:55,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:55,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:55,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-11-09 10:56:55,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:55,474 INFO L124 PetriNetUnfolderBase]: 294/548 cut-off events. [2024-11-09 10:56:55,475 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-09 10:56:55,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1273 conditions, 548 events. 294/548 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2386 event pairs, 264 based on Foata normal form. 28/470 useless extension candidates. Maximal degree in co-relation 963. Up to 534 conditions per place. [2024-11-09 10:56:55,478 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-11-09 10:56:55,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 29 transitions, 156 flow [2024-11-09 10:56:55,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:56:55,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:56:55,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2024-11-09 10:56:55,479 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3581081081081081 [2024-11-09 10:56:55,480 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 114 flow. Second operand 4 states and 53 transitions. [2024-11-09 10:56:55,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 29 transitions, 156 flow [2024-11-09 10:56:55,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 148 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-09 10:56:55,482 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 102 flow [2024-11-09 10:56:55,482 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2024-11-09 10:56:55,482 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2024-11-09 10:56:55,483 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 102 flow [2024-11-09 10:56:55,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:55,483 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:55,483 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:55,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:56:55,483 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:56:55,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:55,484 INFO L85 PathProgramCache]: Analyzing trace with hash -627583917, now seen corresponding path program 1 times [2024-11-09 10:56:55,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:55,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143861589] [2024-11-09 10:56:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:55,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:55,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:55,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143861589] [2024-11-09 10:56:55,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143861589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:55,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744925362] [2024-11-09 10:56:55,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:55,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:55,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:55,594 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:56:55,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:56:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:55,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 10:56:55,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:55,777 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:55,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744925362] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:55,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:55,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-09 10:56:55,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700764364] [2024-11-09 10:56:55,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:55,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:56:55,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:55,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:56:55,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:56:55,945 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:56:55,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 102 flow. Second operand has 14 states, 14 states have (on average 10.357142857142858) internal successors, (145), 14 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:55,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:55,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:56:55,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:56,322 INFO L124 PetriNetUnfolderBase]: 547/1012 cut-off events. [2024-11-09 10:56:56,322 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-11-09 10:56:56,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2287 conditions, 1012 events. 547/1012 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4925 event pairs, 341 based on Foata normal form. 24/840 useless extension candidates. Maximal degree in co-relation 1210. Up to 401 conditions per place. [2024-11-09 10:56:56,329 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 79 selfloop transitions, 10 changer transitions 2/94 dead transitions. [2024-11-09 10:56:56,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 94 transitions, 454 flow [2024-11-09 10:56:56,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:56:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:56:56,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-11-09 10:56:56,333 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4984984984984985 [2024-11-09 10:56:56,333 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 102 flow. Second operand 9 states and 166 transitions. [2024-11-09 10:56:56,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 94 transitions, 454 flow [2024-11-09 10:56:56,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 94 transitions, 449 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:56:56,337 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 180 flow [2024-11-09 10:56:56,337 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=180, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2024-11-09 10:56:56,339 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2024-11-09 10:56:56,340 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 180 flow [2024-11-09 10:56:56,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.357142857142858) internal successors, (145), 14 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:56,341 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:56,341 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:56,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:56:56,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 10:56:56,546 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:56:56,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:56,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1743803067, now seen corresponding path program 2 times [2024-11-09 10:56:56,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:56,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382015074] [2024-11-09 10:56:56,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:56,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:56,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:56,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382015074] [2024-11-09 10:56:56,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382015074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:56,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791041821] [2024-11-09 10:56:56,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:56:56,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:56,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:56,833 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:56:56,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:56:56,896 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:56:56,896 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:56:56,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:56:56,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:56,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:56:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 10:56:57,101 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:56:57,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791041821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:57,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:56:57,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2024-11-09 10:56:57,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934533449] [2024-11-09 10:56:57,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:57,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:56:57,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:57,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:56:57,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-09 10:56:57,111 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:56:57,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:57,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:57,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:56:57,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:57,234 INFO L124 PetriNetUnfolderBase]: 483/910 cut-off events. [2024-11-09 10:56:57,235 INFO L125 PetriNetUnfolderBase]: For 549/549 co-relation queries the response was YES. [2024-11-09 10:56:57,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2097 conditions, 910 events. 483/910 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4526 event pairs, 446 based on Foata normal form. 33/802 useless extension candidates. Maximal degree in co-relation 1649. Up to 888 conditions per place. [2024-11-09 10:56:57,240 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 25 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-11-09 10:56:57,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 32 transitions, 210 flow [2024-11-09 10:56:57,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:56:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:56:57,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 55 transitions. [2024-11-09 10:56:57,242 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3716216216216216 [2024-11-09 10:56:57,242 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 180 flow. Second operand 4 states and 55 transitions. [2024-11-09 10:56:57,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 32 transitions, 210 flow [2024-11-09 10:56:57,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 32 transitions, 197 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-09 10:56:57,247 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 147 flow [2024-11-09 10:56:57,247 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2024-11-09 10:56:57,249 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2024-11-09 10:56:57,250 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 147 flow [2024-11-09 10:56:57,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:57,251 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:57,251 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:57,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 10:56:57,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:57,452 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:56:57,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:57,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1048301473, now seen corresponding path program 1 times [2024-11-09 10:56:57,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:57,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720337071] [2024-11-09 10:56:57,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:57,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:57,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:57,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720337071] [2024-11-09 10:56:57,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720337071] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:57,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:57,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:56:57,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407816696] [2024-11-09 10:56:57,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:57,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:56:57,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:57,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:56:57,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:56:57,490 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:56:57,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:57,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:57,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:56:57,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:57,601 INFO L124 PetriNetUnfolderBase]: 547/1011 cut-off events. [2024-11-09 10:56:57,601 INFO L125 PetriNetUnfolderBase]: For 417/417 co-relation queries the response was YES. [2024-11-09 10:56:57,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2347 conditions, 1011 events. 547/1011 cut-off events. For 417/417 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4915 event pairs, 362 based on Foata normal form. 5/856 useless extension candidates. Maximal degree in co-relation 1872. Up to 714 conditions per place. [2024-11-09 10:56:57,606 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 35 selfloop transitions, 3 changer transitions 4/45 dead transitions. [2024-11-09 10:56:57,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 45 transitions, 273 flow [2024-11-09 10:56:57,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:56:57,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:56:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-11-09 10:56:57,608 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5315315315315315 [2024-11-09 10:56:57,608 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 147 flow. Second operand 3 states and 59 transitions. [2024-11-09 10:56:57,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 45 transitions, 273 flow [2024-11-09 10:56:57,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 263 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-09 10:56:57,611 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 150 flow [2024-11-09 10:56:57,611 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2024-11-09 10:56:57,612 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2024-11-09 10:56:57,612 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 150 flow [2024-11-09 10:56:57,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:57,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:57,613 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] [2024-11-09 10:56:57,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:56:57,613 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:56:57,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:57,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1243439060, now seen corresponding path program 1 times [2024-11-09 10:56:57,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:57,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620916809] [2024-11-09 10:56:57,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:57,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:56:57,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:57,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620916809] [2024-11-09 10:56:57,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620916809] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:57,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106739162] [2024-11-09 10:56:57,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:57,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:57,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:57,871 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:56:57,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:56:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:57,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:56:57,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:56:58,041 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:58,085 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:56:58,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-09 10:56:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:56:58,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106739162] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:58,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:58,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-09 10:56:58,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699844826] [2024-11-09 10:56:58,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:58,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:56:58,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:58,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:56:58,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:56:58,121 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:56:58,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 150 flow. Second operand has 10 states, 10 states have (on average 13.9) internal successors, (139), 10 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:58,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:58,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:56:58,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:58,354 INFO L124 PetriNetUnfolderBase]: 629/1135 cut-off events. [2024-11-09 10:56:58,354 INFO L125 PetriNetUnfolderBase]: For 769/769 co-relation queries the response was YES. [2024-11-09 10:56:58,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2781 conditions, 1135 events. 629/1135 cut-off events. For 769/769 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 5204 event pairs, 136 based on Foata normal form. 2/959 useless extension candidates. Maximal degree in co-relation 1916. Up to 302 conditions per place. [2024-11-09 10:56:58,360 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 47 selfloop transitions, 8 changer transitions 12/70 dead transitions. [2024-11-09 10:56:58,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 70 transitions, 391 flow [2024-11-09 10:56:58,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:56:58,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:56:58,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-11-09 10:56:58,361 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4954954954954955 [2024-11-09 10:56:58,361 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 150 flow. Second operand 6 states and 110 transitions. [2024-11-09 10:56:58,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 70 transitions, 391 flow [2024-11-09 10:56:58,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 70 transitions, 376 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-09 10:56:58,365 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 172 flow [2024-11-09 10:56:58,365 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2024-11-09 10:56:58,366 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 13 predicate places. [2024-11-09 10:56:58,366 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 172 flow [2024-11-09 10:56:58,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.9) internal successors, (139), 10 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:58,366 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:58,366 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:58,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 10:56:58,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:58,571 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:56:58,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:58,572 INFO L85 PathProgramCache]: Analyzing trace with hash 763251397, now seen corresponding path program 2 times [2024-11-09 10:56:58,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:58,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662477967] [2024-11-09 10:56:58,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:58,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:56:58,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:58,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662477967] [2024-11-09 10:56:58,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662477967] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:58,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159994035] [2024-11-09 10:56:58,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:56:58,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:58,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:58,637 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:56:58,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:56:58,730 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:56:58,731 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:56:58,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 10:56:58,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:56:58,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:56:58,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159994035] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:58,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:58,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2024-11-09 10:56:58,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609370104] [2024-11-09 10:56:58,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:58,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:56:58,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:58,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:56:58,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:56:58,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:56:58,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:58,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:58,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:56:58,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:58,977 INFO L124 PetriNetUnfolderBase]: 936/1678 cut-off events. [2024-11-09 10:56:58,977 INFO L125 PetriNetUnfolderBase]: For 1504/1504 co-relation queries the response was YES. [2024-11-09 10:56:58,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4081 conditions, 1678 events. 936/1678 cut-off events. For 1504/1504 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7950 event pairs, 409 based on Foata normal form. 33/1447 useless extension candidates. Maximal degree in co-relation 3119. Up to 667 conditions per place. [2024-11-09 10:56:58,984 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 53 selfloop transitions, 7 changer transitions 3/66 dead transitions. [2024-11-09 10:56:58,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 416 flow [2024-11-09 10:56:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:56:58,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:56:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-11-09 10:56:58,986 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5743243243243243 [2024-11-09 10:56:58,986 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 172 flow. Second operand 4 states and 85 transitions. [2024-11-09 10:56:58,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 416 flow [2024-11-09 10:56:58,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 66 transitions, 398 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-09 10:56:58,989 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 210 flow [2024-11-09 10:56:58,990 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2024-11-09 10:56:58,990 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 14 predicate places. [2024-11-09 10:56:58,990 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 210 flow [2024-11-09 10:56:58,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:58,991 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:58,991 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:59,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 10:56:59,194 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,SelfDestructingSolverStorable9 [2024-11-09 10:56:59,195 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:56:59,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:59,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1404820051, now seen corresponding path program 3 times [2024-11-09 10:56:59,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:59,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940759746] [2024-11-09 10:56:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:59,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:56:59,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:59,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940759746] [2024-11-09 10:56:59,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940759746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:59,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164279243] [2024-11-09 10:56:59,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:56:59,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:59,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:59,579 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:56:59,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:56:59,698 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 10:56:59,698 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:56:59,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 10:56:59,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 10:56:59,797 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:59,840 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:56:59,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-09 10:56:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 10:56:59,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164279243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:59,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:59,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2024-11-09 10:56:59,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433636428] [2024-11-09 10:56:59,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:59,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:56:59,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:59,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:56:59,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:56:59,922 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:56:59,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 210 flow. Second operand has 13 states, 13 states have (on average 11.461538461538462) internal successors, (149), 13 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:59,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:59,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:56:59,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:00,363 INFO L124 PetriNetUnfolderBase]: 959/1673 cut-off events. [2024-11-09 10:57:00,363 INFO L125 PetriNetUnfolderBase]: For 2491/2491 co-relation queries the response was YES. [2024-11-09 10:57:00,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4507 conditions, 1673 events. 959/1673 cut-off events. For 2491/2491 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 7574 event pairs, 140 based on Foata normal form. 4/1418 useless extension candidates. Maximal degree in co-relation 4468. Up to 427 conditions per place. [2024-11-09 10:57:00,370 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 58 selfloop transitions, 15 changer transitions 24/100 dead transitions. [2024-11-09 10:57:00,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 100 transitions, 598 flow [2024-11-09 10:57:00,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:57:00,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:57:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-11-09 10:57:00,371 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4756756756756757 [2024-11-09 10:57:00,371 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 210 flow. Second operand 10 states and 176 transitions. [2024-11-09 10:57:00,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 100 transitions, 598 flow [2024-11-09 10:57:00,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 100 transitions, 550 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-11-09 10:57:00,375 INFO L231 Difference]: Finished difference. Result has 57 places, 38 transitions, 269 flow [2024-11-09 10:57:00,375 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=269, PETRI_PLACES=57, PETRI_TRANSITIONS=38} [2024-11-09 10:57:00,376 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2024-11-09 10:57:00,376 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 38 transitions, 269 flow [2024-11-09 10:57:00,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.461538461538462) internal successors, (149), 13 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:00,376 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:00,376 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:00,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 10:57:00,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:00,577 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:57:00,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:00,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1682690089, now seen corresponding path program 4 times [2024-11-09 10:57:00,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:00,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884771913] [2024-11-09 10:57:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:00,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:00,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:00,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884771913] [2024-11-09 10:57:00,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884771913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:00,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921707440] [2024-11-09 10:57:00,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:57:00,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:00,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:00,932 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:00,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:57:01,031 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:57:01,031 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:01,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 10:57:01,034 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:57:01,284 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:01,359 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:57:01,359 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 28 treesize of output 11 [2024-11-09 10:57:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:57:01,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921707440] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:01,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:01,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 19 [2024-11-09 10:57:01,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314941410] [2024-11-09 10:57:01,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:01,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 10:57:01,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:01,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 10:57:01,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-11-09 10:57:01,473 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:57:01,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 38 transitions, 269 flow. Second operand has 20 states, 20 states have (on average 12.05) internal successors, (241), 20 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:01,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:01,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:57:01,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:02,144 INFO L124 PetriNetUnfolderBase]: 1039/1809 cut-off events. [2024-11-09 10:57:02,145 INFO L125 PetriNetUnfolderBase]: For 2530/2530 co-relation queries the response was YES. [2024-11-09 10:57:02,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4774 conditions, 1809 events. 1039/1809 cut-off events. For 2530/2530 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 8259 event pairs, 104 based on Foata normal form. 1/1530 useless extension candidates. Maximal degree in co-relation 4730. Up to 325 conditions per place. [2024-11-09 10:57:02,155 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 90 selfloop transitions, 17 changer transitions 39/149 dead transitions. [2024-11-09 10:57:02,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 149 transitions, 844 flow [2024-11-09 10:57:02,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 10:57:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-09 10:57:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 257 transitions. [2024-11-09 10:57:02,158 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49613899613899615 [2024-11-09 10:57:02,158 INFO L175 Difference]: Start difference. First operand has 57 places, 38 transitions, 269 flow. Second operand 14 states and 257 transitions. [2024-11-09 10:57:02,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 149 transitions, 844 flow [2024-11-09 10:57:02,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 149 transitions, 776 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-11-09 10:57:02,165 INFO L231 Difference]: Finished difference. Result has 62 places, 40 transitions, 265 flow [2024-11-09 10:57:02,166 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=265, PETRI_PLACES=62, PETRI_TRANSITIONS=40} [2024-11-09 10:57:02,168 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2024-11-09 10:57:02,169 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 40 transitions, 265 flow [2024-11-09 10:57:02,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.05) internal successors, (241), 20 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:02,169 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:02,169 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:02,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 10:57:02,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:02,370 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:57:02,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:02,371 INFO L85 PathProgramCache]: Analyzing trace with hash -893986846, now seen corresponding path program 5 times [2024-11-09 10:57:02,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:02,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307920482] [2024-11-09 10:57:02,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:02,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 10:57:02,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:02,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307920482] [2024-11-09 10:57:02,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307920482] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:02,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841346820] [2024-11-09 10:57:02,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 10:57:02,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:02,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:02,578 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:02,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:57:02,673 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-09 10:57:02,673 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:02,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 10:57:02,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 10:57:02,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 10:57:02,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841346820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:02,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:02,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2024-11-09 10:57:02,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287940393] [2024-11-09 10:57:02,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:02,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:57:02,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:02,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:57:02,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:57:02,816 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:57:02,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 40 transitions, 265 flow. Second operand has 11 states, 11 states have (on average 13.0) internal successors, (143), 11 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:02,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:02,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:57:02,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:03,436 INFO L124 PetriNetUnfolderBase]: 2981/5203 cut-off events. [2024-11-09 10:57:03,436 INFO L125 PetriNetUnfolderBase]: For 5750/5750 co-relation queries the response was YES. [2024-11-09 10:57:03,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12999 conditions, 5203 events. 2981/5203 cut-off events. For 5750/5750 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 29582 event pairs, 720 based on Foata normal form. 66/4456 useless extension candidates. Maximal degree in co-relation 9481. Up to 1046 conditions per place. [2024-11-09 10:57:03,456 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 71 selfloop transitions, 25 changer transitions 88/187 dead transitions. [2024-11-09 10:57:03,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 187 transitions, 1239 flow [2024-11-09 10:57:03,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 10:57:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-09 10:57:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 271 transitions. [2024-11-09 10:57:03,457 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5231660231660231 [2024-11-09 10:57:03,457 INFO L175 Difference]: Start difference. First operand has 62 places, 40 transitions, 265 flow. Second operand 14 states and 271 transitions. [2024-11-09 10:57:03,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 187 transitions, 1239 flow [2024-11-09 10:57:03,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 187 transitions, 1136 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-11-09 10:57:03,467 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 438 flow [2024-11-09 10:57:03,468 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=438, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2024-11-09 10:57:03,468 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2024-11-09 10:57:03,468 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 438 flow [2024-11-09 10:57:03,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.0) internal successors, (143), 11 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:03,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:03,469 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:03,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 10:57:03,669 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,SelfDestructingSolverStorable12 [2024-11-09 10:57:03,669 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:57:03,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:03,670 INFO L85 PathProgramCache]: Analyzing trace with hash 687773500, now seen corresponding path program 6 times [2024-11-09 10:57:03,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:03,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185925416] [2024-11-09 10:57:03,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:03,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:57:04,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:04,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185925416] [2024-11-09 10:57:04,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185925416] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:04,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451560886] [2024-11-09 10:57:04,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 10:57:04,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:04,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:04,129 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:04,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:57:04,345 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-09 10:57:04,345 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:04,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 10:57:04,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:04,584 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:57:04,584 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 26 treesize of output 10 [2024-11-09 10:57:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:57:04,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:04,650 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:57:04,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-09 10:57:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:57:04,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451560886] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:04,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:04,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2024-11-09 10:57:04,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542919103] [2024-11-09 10:57:04,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:04,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 10:57:04,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:04,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 10:57:04,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2024-11-09 10:57:05,022 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:57:05,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 438 flow. Second operand has 27 states, 27 states have (on average 11.296296296296296) internal successors, (305), 27 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:05,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:05,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:57:05,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:07,499 INFO L124 PetriNetUnfolderBase]: 7223/12501 cut-off events. [2024-11-09 10:57:07,499 INFO L125 PetriNetUnfolderBase]: For 15224/15224 co-relation queries the response was YES. [2024-11-09 10:57:07,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32470 conditions, 12501 events. 7223/12501 cut-off events. For 15224/15224 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 83257 event pairs, 715 based on Foata normal form. 102/10654 useless extension candidates. Maximal degree in co-relation 31995. Up to 2300 conditions per place. [2024-11-09 10:57:07,557 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 269 selfloop transitions, 68 changer transitions 216/556 dead transitions. [2024-11-09 10:57:07,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 556 transitions, 3589 flow [2024-11-09 10:57:07,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-09 10:57:07,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-11-09 10:57:07,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 839 transitions. [2024-11-09 10:57:07,563 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5398970398970399 [2024-11-09 10:57:07,563 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 438 flow. Second operand 42 states and 839 transitions. [2024-11-09 10:57:07,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 556 transitions, 3589 flow [2024-11-09 10:57:07,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 556 transitions, 3399 flow, removed 93 selfloop flow, removed 5 redundant places. [2024-11-09 10:57:07,593 INFO L231 Difference]: Finished difference. Result has 119 places, 95 transitions, 1031 flow [2024-11-09 10:57:07,594 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1031, PETRI_PLACES=119, PETRI_TRANSITIONS=95} [2024-11-09 10:57:07,595 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 83 predicate places. [2024-11-09 10:57:07,595 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 95 transitions, 1031 flow [2024-11-09 10:57:07,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 11.296296296296296) internal successors, (305), 27 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:07,596 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:07,596 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:07,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 10:57:07,796 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,SelfDestructingSolverStorable13 [2024-11-09 10:57:07,797 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:57:07,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:07,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1208331588, now seen corresponding path program 7 times [2024-11-09 10:57:07,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:07,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579266580] [2024-11-09 10:57:07,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:07,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:08,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:08,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579266580] [2024-11-09 10:57:08,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579266580] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:08,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127812947] [2024-11-09 10:57:08,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 10:57:08,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:08,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:08,308 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:08,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:57:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:08,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:57:08,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 10:57:08,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:08,700 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:57:08,701 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 28 treesize of output 11 [2024-11-09 10:57:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 10:57:08,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127812947] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:08,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:08,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 24 [2024-11-09 10:57:08,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406726665] [2024-11-09 10:57:08,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:08,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 10:57:08,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:08,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 10:57:08,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2024-11-09 10:57:08,836 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:57:08,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 95 transitions, 1031 flow. Second operand has 25 states, 25 states have (on average 11.96) internal successors, (299), 25 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:08,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:08,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:57:08,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:10,714 INFO L124 PetriNetUnfolderBase]: 5545/9625 cut-off events. [2024-11-09 10:57:10,715 INFO L125 PetriNetUnfolderBase]: For 25485/25485 co-relation queries the response was YES. [2024-11-09 10:57:10,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27250 conditions, 9625 events. 5545/9625 cut-off events. For 25485/25485 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 60603 event pairs, 636 based on Foata normal form. 18/8134 useless extension candidates. Maximal degree in co-relation 27154. Up to 1775 conditions per place. [2024-11-09 10:57:10,756 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 125 selfloop transitions, 69 changer transitions 70/267 dead transitions. [2024-11-09 10:57:10,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 267 transitions, 2237 flow [2024-11-09 10:57:10,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 10:57:10,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-09 10:57:10,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 359 transitions. [2024-11-09 10:57:10,758 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5106685633001422 [2024-11-09 10:57:10,758 INFO L175 Difference]: Start difference. First operand has 119 places, 95 transitions, 1031 flow. Second operand 19 states and 359 transitions. [2024-11-09 10:57:10,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 267 transitions, 2237 flow [2024-11-09 10:57:10,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 267 transitions, 2038 flow, removed 76 selfloop flow, removed 12 redundant places. [2024-11-09 10:57:10,878 INFO L231 Difference]: Finished difference. Result has 123 places, 96 transitions, 1210 flow [2024-11-09 10:57:10,879 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1210, PETRI_PLACES=123, PETRI_TRANSITIONS=96} [2024-11-09 10:57:10,879 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 87 predicate places. [2024-11-09 10:57:10,879 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 96 transitions, 1210 flow [2024-11-09 10:57:10,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.96) internal successors, (299), 25 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:10,880 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:10,880 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:10,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 10:57:11,084 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,SelfDestructingSolverStorable14 [2024-11-09 10:57:11,085 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:57:11,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:11,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1446394027, now seen corresponding path program 8 times [2024-11-09 10:57:11,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:11,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723236738] [2024-11-09 10:57:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:11,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 10:57:11,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:11,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723236738] [2024-11-09 10:57:11,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723236738] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:11,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951539829] [2024-11-09 10:57:11,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:57:11,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:11,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:11,287 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:11,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:57:11,375 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:57:11,375 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:11,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:57:11,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 10:57:11,451 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 10:57:11,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951539829] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:11,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:11,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2024-11-09 10:57:11,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727274054] [2024-11-09 10:57:11,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:11,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:57:11,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:11,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:57:11,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:57:11,552 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:57:11,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 96 transitions, 1210 flow. Second operand has 14 states, 14 states have (on average 12.714285714285714) internal successors, (178), 14 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:11,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:11,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:57:11,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:13,055 INFO L124 PetriNetUnfolderBase]: 7619/13113 cut-off events. [2024-11-09 10:57:13,055 INFO L125 PetriNetUnfolderBase]: For 42488/42488 co-relation queries the response was YES. [2024-11-09 10:57:13,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39225 conditions, 13113 events. 7619/13113 cut-off events. For 42488/42488 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 85908 event pairs, 1569 based on Foata normal form. 33/11111 useless extension candidates. Maximal degree in co-relation 35866. Up to 3090 conditions per place. [2024-11-09 10:57:13,123 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 100 selfloop transitions, 82 changer transitions 99/284 dead transitions. [2024-11-09 10:57:13,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 284 transitions, 3036 flow [2024-11-09 10:57:13,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 10:57:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-09 10:57:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 327 transitions. [2024-11-09 10:57:13,125 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.519872813990461 [2024-11-09 10:57:13,126 INFO L175 Difference]: Start difference. First operand has 123 places, 96 transitions, 1210 flow. Second operand 17 states and 327 transitions. [2024-11-09 10:57:13,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 284 transitions, 3036 flow [2024-11-09 10:57:13,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 284 transitions, 2634 flow, removed 144 selfloop flow, removed 15 redundant places. [2024-11-09 10:57:13,251 INFO L231 Difference]: Finished difference. Result has 120 places, 127 transitions, 1709 flow [2024-11-09 10:57:13,252 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1709, PETRI_PLACES=120, PETRI_TRANSITIONS=127} [2024-11-09 10:57:13,252 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 84 predicate places. [2024-11-09 10:57:13,252 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 127 transitions, 1709 flow [2024-11-09 10:57:13,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.714285714285714) internal successors, (178), 14 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:13,253 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:13,253 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:13,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 10:57:13,453 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,SelfDestructingSolverStorable15 [2024-11-09 10:57:13,453 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:57:13,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:13,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1375562509, now seen corresponding path program 9 times [2024-11-09 10:57:13,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:13,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699919170] [2024-11-09 10:57:13,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:13,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:57:14,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:14,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699919170] [2024-11-09 10:57:14,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699919170] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:14,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123860767] [2024-11-09 10:57:14,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:57:14,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:14,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:14,159 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:14,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 10:57:14,366 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 10:57:14,366 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:14,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 10:57:14,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:14,709 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:57:14,709 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 26 treesize of output 10 [2024-11-09 10:57:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 10:57:14,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:14,770 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:57:14,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-09 10:57:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 10:57:15,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123860767] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:15,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:15,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-11-09 10:57:15,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679601529] [2024-11-09 10:57:15,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:15,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 10:57:15,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:15,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 10:57:15,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 10:57:15,201 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:57:15,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 127 transitions, 1709 flow. Second operand has 33 states, 33 states have (on average 11.242424242424242) internal successors, (371), 33 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:15,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:15,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:57:15,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:21,521 INFO L124 PetriNetUnfolderBase]: 23873/41053 cut-off events. [2024-11-09 10:57:21,522 INFO L125 PetriNetUnfolderBase]: For 102647/102647 co-relation queries the response was YES. [2024-11-09 10:57:21,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117285 conditions, 41053 events. 23873/41053 cut-off events. For 102647/102647 co-relation queries the response was YES. Maximal size of possible extension queue 1027. Compared 324551 event pairs, 1781 based on Foata normal form. 348/34996 useless extension candidates. Maximal degree in co-relation 101861. Up to 7600 conditions per place. [2024-11-09 10:57:21,793 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 352 selfloop transitions, 148 changer transitions 502/1005 dead transitions. [2024-11-09 10:57:21,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 1005 transitions, 9392 flow [2024-11-09 10:57:22,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-09 10:57:22,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2024-11-09 10:57:22,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 1233 transitions. [2024-11-09 10:57:22,027 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5463003987594152 [2024-11-09 10:57:22,027 INFO L175 Difference]: Start difference. First operand has 120 places, 127 transitions, 1709 flow. Second operand 61 states and 1233 transitions. [2024-11-09 10:57:22,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 1005 transitions, 9392 flow [2024-11-09 10:57:22,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 1005 transitions, 8683 flow, removed 341 selfloop flow, removed 7 redundant places. [2024-11-09 10:57:22,432 INFO L231 Difference]: Finished difference. Result has 181 places, 186 transitions, 2733 flow [2024-11-09 10:57:22,433 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=2733, PETRI_PLACES=181, PETRI_TRANSITIONS=186} [2024-11-09 10:57:22,433 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 145 predicate places. [2024-11-09 10:57:22,433 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 186 transitions, 2733 flow [2024-11-09 10:57:22,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 11.242424242424242) internal successors, (371), 33 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:22,434 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:22,434 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:22,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 10:57:22,634 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,SelfDestructingSolverStorable16 [2024-11-09 10:57:22,635 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:57:22,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:22,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1057668857, now seen corresponding path program 10 times [2024-11-09 10:57:22,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:22,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373222553] [2024-11-09 10:57:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:22,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:23,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:23,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373222553] [2024-11-09 10:57:23,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373222553] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:23,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332952112] [2024-11-09 10:57:23,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:57:23,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:23,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:23,174 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:23,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 10:57:23,295 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:57:23,296 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:23,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 10:57:23,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:57:23,828 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:23,963 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:57:23,964 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 28 treesize of output 11 [2024-11-09 10:57:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 10:57:24,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332952112] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:24,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:24,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 35 [2024-11-09 10:57:24,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355849108] [2024-11-09 10:57:24,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:24,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-09 10:57:24,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:24,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-09 10:57:24,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 10:57:24,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:57:24,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 186 transitions, 2733 flow. Second operand has 36 states, 36 states have (on average 11.472222222222221) internal successors, (413), 36 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:24,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:24,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:57:24,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:27,791 INFO L124 PetriNetUnfolderBase]: 12577/21663 cut-off events. [2024-11-09 10:57:27,792 INFO L125 PetriNetUnfolderBase]: For 87738/87738 co-relation queries the response was YES. [2024-11-09 10:57:27,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65626 conditions, 21663 events. 12577/21663 cut-off events. For 87738/87738 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 153353 event pairs, 1152 based on Foata normal form. 25/18306 useless extension candidates. Maximal degree in co-relation 65477. Up to 4000 conditions per place. [2024-11-09 10:57:27,900 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 156 selfloop transitions, 160 changer transitions 101/420 dead transitions. [2024-11-09 10:57:27,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 420 transitions, 4728 flow [2024-11-09 10:57:27,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 10:57:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-09 10:57:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 457 transitions. [2024-11-09 10:57:27,902 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5146396396396397 [2024-11-09 10:57:27,902 INFO L175 Difference]: Start difference. First operand has 181 places, 186 transitions, 2733 flow. Second operand 24 states and 457 transitions. [2024-11-09 10:57:27,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 420 transitions, 4728 flow [2024-11-09 10:57:28,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 420 transitions, 4469 flow, removed 120 selfloop flow, removed 10 redundant places. [2024-11-09 10:57:28,347 INFO L231 Difference]: Finished difference. Result has 184 places, 188 transitions, 3373 flow [2024-11-09 10:57:28,347 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2564, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3373, PETRI_PLACES=184, PETRI_TRANSITIONS=188} [2024-11-09 10:57:28,348 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 148 predicate places. [2024-11-09 10:57:28,348 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 188 transitions, 3373 flow [2024-11-09 10:57:28,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 11.472222222222221) internal successors, (413), 36 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:28,348 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:28,349 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:28,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 10:57:28,549 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,SelfDestructingSolverStorable17 [2024-11-09 10:57:28,549 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:57:28,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:28,550 INFO L85 PathProgramCache]: Analyzing trace with hash 430307506, now seen corresponding path program 11 times [2024-11-09 10:57:28,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:28,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875841239] [2024-11-09 10:57:28,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:28,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 10:57:28,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:28,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875841239] [2024-11-09 10:57:28,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875841239] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:28,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670986396] [2024-11-09 10:57:28,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 10:57:28,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:28,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:28,931 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:28,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 10:57:29,038 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-09 10:57:29,039 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:29,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 10:57:29,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 10:57:29,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 10:57:29,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670986396] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:29,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:29,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 16 [2024-11-09 10:57:29,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425122693] [2024-11-09 10:57:29,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:29,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 10:57:29,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:29,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 10:57:29,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-11-09 10:57:29,288 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:57:29,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 188 transitions, 3373 flow. Second operand has 17 states, 17 states have (on average 12.529411764705882) internal successors, (213), 17 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:29,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:29,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:57:29,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:33,568 INFO L124 PetriNetUnfolderBase]: 17515/29977 cut-off events. [2024-11-09 10:57:33,569 INFO L125 PetriNetUnfolderBase]: For 154265/154265 co-relation queries the response was YES. [2024-11-09 10:57:33,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98268 conditions, 29977 events. 17515/29977 cut-off events. For 154265/154265 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 221778 event pairs, 3039 based on Foata normal form. 33/25367 useless extension candidates. Maximal degree in co-relation 93862. Up to 6740 conditions per place. [2024-11-09 10:57:33,785 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 140 selfloop transitions, 193 changer transitions 126/462 dead transitions. [2024-11-09 10:57:33,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 462 transitions, 7084 flow [2024-11-09 10:57:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 10:57:33,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-09 10:57:33,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 404 transitions. [2024-11-09 10:57:33,787 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.51994851994852 [2024-11-09 10:57:33,787 INFO L175 Difference]: Start difference. First operand has 184 places, 188 transitions, 3373 flow. Second operand 21 states and 404 transitions. [2024-11-09 10:57:33,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 462 transitions, 7084 flow [2024-11-09 10:57:34,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 462 transitions, 6066 flow, removed 318 selfloop flow, removed 23 redundant places. [2024-11-09 10:57:34,224 INFO L231 Difference]: Finished difference. Result has 175 places, 264 transitions, 4777 flow [2024-11-09 10:57:34,225 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2787, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4777, PETRI_PLACES=175, PETRI_TRANSITIONS=264} [2024-11-09 10:57:34,225 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 139 predicate places. [2024-11-09 10:57:34,225 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 264 transitions, 4777 flow [2024-11-09 10:57:34,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 12.529411764705882) internal successors, (213), 17 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:34,225 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:34,226 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:34,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 10:57:34,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:34,426 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:57:34,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:34,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1256696020, now seen corresponding path program 12 times [2024-11-09 10:57:34,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:34,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976981326] [2024-11-09 10:57:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:34,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 27 proven. 73 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:57:35,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:35,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976981326] [2024-11-09 10:57:35,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976981326] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:35,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778329853] [2024-11-09 10:57:35,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 10:57:35,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:35,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:35,359 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:35,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 10:57:35,878 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-09 10:57:35,878 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:35,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:57:35,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 10:57:36,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:36,044 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:57:36,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-09 10:57:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 10:57:36,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778329853] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:36,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:36,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2024-11-09 10:57:36,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274378465] [2024-11-09 10:57:36,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:36,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 10:57:36,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:36,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 10:57:36,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2024-11-09 10:57:36,205 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:57:36,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 264 transitions, 4777 flow. Second operand has 22 states, 22 states have (on average 11.954545454545455) internal successors, (263), 22 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:36,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:36,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:57:36,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:40,764 INFO L124 PetriNetUnfolderBase]: 18330/31308 cut-off events. [2024-11-09 10:57:40,764 INFO L125 PetriNetUnfolderBase]: For 130965/130965 co-relation queries the response was YES. [2024-11-09 10:57:40,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98545 conditions, 31308 events. 18330/31308 cut-off events. For 130965/130965 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 230865 event pairs, 1373 based on Foata normal form. 11/26476 useless extension candidates. Maximal degree in co-relation 98429. Up to 5750 conditions per place. [2024-11-09 10:57:40,915 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 269 selfloop transitions, 247 changer transitions 45/564 dead transitions. [2024-11-09 10:57:40,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 564 transitions, 7610 flow [2024-11-09 10:57:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-09 10:57:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-09 10:57:40,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 585 transitions. [2024-11-09 10:57:40,917 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.527027027027027 [2024-11-09 10:57:40,917 INFO L175 Difference]: Start difference. First operand has 175 places, 264 transitions, 4777 flow. Second operand 30 states and 585 transitions. [2024-11-09 10:57:40,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 564 transitions, 7610 flow [2024-11-09 10:57:41,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 564 transitions, 6949 flow, removed 311 selfloop flow, removed 10 redundant places. [2024-11-09 10:57:41,326 INFO L231 Difference]: Finished difference. Result has 188 places, 297 transitions, 5412 flow [2024-11-09 10:57:41,326 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=4316, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5412, PETRI_PLACES=188, PETRI_TRANSITIONS=297} [2024-11-09 10:57:41,326 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 152 predicate places. [2024-11-09 10:57:41,326 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 297 transitions, 5412 flow [2024-11-09 10:57:41,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 11.954545454545455) internal successors, (263), 22 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:41,327 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:41,327 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:41,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 10:57:41,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:41,527 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:57:41,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:41,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1733637452, now seen corresponding path program 13 times [2024-11-09 10:57:41,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:41,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433353030] [2024-11-09 10:57:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:41,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:42,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:42,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433353030] [2024-11-09 10:57:42,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433353030] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:42,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466135576] [2024-11-09 10:57:42,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 10:57:42,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:42,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:42,143 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:42,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 10:57:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:42,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 10:57:42,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:57:42,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:42,857 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:57:42,858 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 28 treesize of output 11 [2024-11-09 10:57:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 10:57:42,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466135576] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:42,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:42,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 12] total 38 [2024-11-09 10:57:43,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675597225] [2024-11-09 10:57:43,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:43,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-09 10:57:43,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:43,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-09 10:57:43,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 10:57:43,089 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:57:43,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 297 transitions, 5412 flow. Second operand has 39 states, 39 states have (on average 11.564102564102564) internal successors, (451), 39 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:43,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:43,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:57:43,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:49,829 INFO L124 PetriNetUnfolderBase]: 21690/37000 cut-off events. [2024-11-09 10:57:49,830 INFO L125 PetriNetUnfolderBase]: For 155328/155328 co-relation queries the response was YES. [2024-11-09 10:57:50,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114481 conditions, 37000 events. 21690/37000 cut-off events. For 155328/155328 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 279370 event pairs, 1580 based on Foata normal form. 16/31291 useless extension candidates. Maximal degree in co-relation 114356. Up to 6800 conditions per place. [2024-11-09 10:57:50,141 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 183 selfloop transitions, 315 changer transitions 93/594 dead transitions. [2024-11-09 10:57:50,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 594 transitions, 8053 flow [2024-11-09 10:57:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 10:57:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-09 10:57:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 555 transitions. [2024-11-09 10:57:50,143 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5172413793103449 [2024-11-09 10:57:50,143 INFO L175 Difference]: Start difference. First operand has 188 places, 297 transitions, 5412 flow. Second operand 29 states and 555 transitions. [2024-11-09 10:57:50,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 594 transitions, 8053 flow [2024-11-09 10:57:50,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 594 transitions, 7438 flow, removed 68 selfloop flow, removed 15 redundant places. [2024-11-09 10:57:50,690 INFO L231 Difference]: Finished difference. Result has 212 places, 340 transitions, 6852 flow [2024-11-09 10:57:50,690 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=4802, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6852, PETRI_PLACES=212, PETRI_TRANSITIONS=340} [2024-11-09 10:57:50,691 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 176 predicate places. [2024-11-09 10:57:50,691 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 340 transitions, 6852 flow [2024-11-09 10:57:50,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 11.564102564102564) internal successors, (451), 39 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:50,691 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:50,691 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:50,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 10:57:50,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:50,892 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:57:50,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:50,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1751544805, now seen corresponding path program 14 times [2024-11-09 10:57:50,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:50,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549603009] [2024-11-09 10:57:50,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:50,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 57 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 10:57:51,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:51,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549603009] [2024-11-09 10:57:51,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549603009] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:51,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518625119] [2024-11-09 10:57:51,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:57:51,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:51,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:51,186 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:51,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 10:57:51,289 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:57:51,290 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:51,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 10:57:51,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 47 proven. 48 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 10:57:51,413 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 47 proven. 48 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 10:57:51,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518625119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:51,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:51,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 19 [2024-11-09 10:57:51,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172609673] [2024-11-09 10:57:51,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:51,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 10:57:51,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:51,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 10:57:51,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-11-09 10:57:51,747 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-09 10:57:51,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 340 transitions, 6852 flow. Second operand has 20 states, 20 states have (on average 12.4) internal successors, (248), 20 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:51,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:51,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-09 10:57:51,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand