./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc 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/parallel-min-max-1.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 bf26be9bd61f36f1b6136fc4e500a91a95d08528025fd00027577283116c4a35 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:47:20,551 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:47:20,624 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:47:20,628 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:47:20,629 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:47:20,656 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:47:20,657 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:47:20,657 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:47:20,658 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:47:20,659 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:47:20,660 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:47:20,660 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:47:20,661 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:47:20,661 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:47:20,663 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:47:20,663 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:47:20,663 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:47:20,663 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:47:20,664 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:47:20,664 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:47:20,664 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:47:20,665 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:47:20,668 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:47:20,668 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:47:20,668 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:47:20,668 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:47:20,669 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:47:20,669 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:47:20,669 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:47:20,669 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:47:20,670 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:47:20,670 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:47:20,670 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:47:20,670 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:47:20,670 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:47:20,670 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:47:20,671 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:47:20,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:47:20,671 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:47:20,671 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:47:20,671 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:47:20,672 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:47:20,672 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf26be9bd61f36f1b6136fc4e500a91a95d08528025fd00027577283116c4a35 [2024-11-19 09:47:20,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:47:20,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:47:20,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:47:20,923 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:47:20,924 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:47:20,925 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2024-11-19 09:47:22,265 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:47:22,442 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:47:22,444 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2024-11-19 09:47:22,453 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddde3619e/b79797b647ca40c7b8ec829c2f2e0143/FLAGfd8a2ede8 [2024-11-19 09:47:22,469 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddde3619e/b79797b647ca40c7b8ec829c2f2e0143 [2024-11-19 09:47:22,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:47:22,473 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:47:22,475 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:47:22,476 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:47:22,480 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:47:22,481 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:47:22" (1/1) ... [2024-11-19 09:47:22,482 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b1dd35b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:22, skipping insertion in model container [2024-11-19 09:47:22,482 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:47:22" (1/1) ... [2024-11-19 09:47:22,504 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:47:22,696 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:47:22,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:47:22,710 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:47:22,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:47:22,761 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:47:22,761 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:22 WrapperNode [2024-11-19 09:47:22,762 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:47:22,763 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:47:22,763 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:47:22,764 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:47:22,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:22" (1/1) ... [2024-11-19 09:47:22,776 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:22" (1/1) ... [2024-11-19 09:47:22,826 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 122 [2024-11-19 09:47:22,830 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:47:22,831 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:47:22,831 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:47:22,831 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:47:22,874 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:22" (1/1) ... [2024-11-19 09:47:22,874 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:22" (1/1) ... [2024-11-19 09:47:22,882 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:22" (1/1) ... [2024-11-19 09:47:22,906 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 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]. [2024-11-19 09:47:22,908 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:22" (1/1) ... [2024-11-19 09:47:22,909 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:22" (1/1) ... [2024-11-19 09:47:22,914 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:22" (1/1) ... [2024-11-19 09:47:22,927 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:22" (1/1) ... [2024-11-19 09:47:22,936 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:22" (1/1) ... [2024-11-19 09:47:22,937 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:22" (1/1) ... [2024-11-19 09:47:22,946 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:47:22,947 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:47:22,947 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:47:22,947 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:47:22,947 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:22" (1/1) ... [2024-11-19 09:47:22,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:47:22,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:22,991 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) [2024-11-19 09:47:22,996 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 [2024-11-19 09:47:23,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:47:23,038 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:47:23,038 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:47:23,039 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:47:23,039 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:47:23,039 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:47:23,039 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:47:23,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:47:23,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:47:23,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:47:23,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:47:23,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:47:23,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:47:23,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:47:23,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:47:23,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:47:23,041 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:47:23,121 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:47:23,123 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:47:23,383 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:47:23,384 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:47:23,541 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:47:23,541 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 09:47:23,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:47:23 BoogieIcfgContainer [2024-11-19 09:47:23,542 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:47:23,544 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:47:23,544 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:47:23,547 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:47:23,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:47:22" (1/3) ... [2024-11-19 09:47:23,548 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bcd72cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:47:23, skipping insertion in model container [2024-11-19 09:47:23,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:22" (2/3) ... [2024-11-19 09:47:23,548 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bcd72cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:47:23, skipping insertion in model container [2024-11-19 09:47:23,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:47:23" (3/3) ... [2024-11-19 09:47:23,549 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2024-11-19 09:47:23,562 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:47:23,562 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-19 09:47:23,563 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:47:23,614 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 09:47:23,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 84 transitions, 189 flow [2024-11-19 09:47:23,674 INFO L124 PetriNetUnfolderBase]: 6/81 cut-off events. [2024-11-19 09:47:23,674 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:47:23,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 81 events. 6/81 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 160 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2024-11-19 09:47:23,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 84 transitions, 189 flow [2024-11-19 09:47:23,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 80 transitions, 178 flow [2024-11-19 09:47:23,688 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:47:23,693 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5bf7b423, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:47:23,693 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-11-19 09:47:23,700 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:47:23,701 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2024-11-19 09:47:23,701 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:47:23,701 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:23,702 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:23,702 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:47:23,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:23,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1295196382, now seen corresponding path program 1 times [2024-11-19 09:47:23,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:23,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688976657] [2024-11-19 09:47:23,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:23,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:24,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:24,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688976657] [2024-11-19 09:47:24,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688976657] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:47:24,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:47:24,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:47:24,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119895234] [2024-11-19 09:47:24,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:24,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:47:24,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:24,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:47:24,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:47:24,096 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 84 [2024-11-19 09:47:24,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:24,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:24,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 84 [2024-11-19 09:47:24,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:24,254 INFO L124 PetriNetUnfolderBase]: 443/945 cut-off events. [2024-11-19 09:47:24,254 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-19 09:47:24,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1642 conditions, 945 events. 443/945 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6068 event pairs, 254 based on Foata normal form. 1/579 useless extension candidates. Maximal degree in co-relation 1516. Up to 615 conditions per place. [2024-11-19 09:47:24,267 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 29 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2024-11-19 09:47:24,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 77 transitions, 234 flow [2024-11-19 09:47:24,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:47:24,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:47:24,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2024-11-19 09:47:24,281 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7261904761904762 [2024-11-19 09:47:24,282 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 178 flow. Second operand 3 states and 183 transitions. [2024-11-19 09:47:24,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 77 transitions, 234 flow [2024-11-19 09:47:24,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 77 transitions, 222 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:47:24,294 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 164 flow [2024-11-19 09:47:24,296 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2024-11-19 09:47:24,299 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -7 predicate places. [2024-11-19 09:47:24,301 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 164 flow [2024-11-19 09:47:24,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:24,302 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:24,302 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:24,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:47:24,302 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:47:24,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:24,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1295196383, now seen corresponding path program 1 times [2024-11-19 09:47:24,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:24,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929817779] [2024-11-19 09:47:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:24,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:24,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:24,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929817779] [2024-11-19 09:47:24,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929817779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:47:24,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:47:24,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:47:24,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833844961] [2024-11-19 09:47:24,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:24,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:47:24,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:24,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:47:24,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:47:24,783 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2024-11-19 09:47:24,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 164 flow. Second operand has 7 states, 7 states have (on average 50.42857142857143) internal successors, (353), 7 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:24,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:24,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2024-11-19 09:47:24,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:25,032 INFO L124 PetriNetUnfolderBase]: 443/947 cut-off events. [2024-11-19 09:47:25,032 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:47:25,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1604 conditions, 947 events. 443/947 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6042 event pairs, 254 based on Foata normal form. 1/581 useless extension candidates. Maximal degree in co-relation 1566. Up to 615 conditions per place. [2024-11-19 09:47:25,041 INFO L140 encePairwiseOnDemand]: 77/84 looper letters, 30 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2024-11-19 09:47:25,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 79 transitions, 238 flow [2024-11-19 09:47:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:47:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:47:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 331 transitions. [2024-11-19 09:47:25,047 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6567460317460317 [2024-11-19 09:47:25,048 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 164 flow. Second operand 6 states and 331 transitions. [2024-11-19 09:47:25,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 79 transitions, 238 flow [2024-11-19 09:47:25,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 79 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:47:25,053 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 180 flow [2024-11-19 09:47:25,054 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=180, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2024-11-19 09:47:25,054 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2024-11-19 09:47:25,055 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 180 flow [2024-11-19 09:47:25,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 50.42857142857143) internal successors, (353), 7 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:25,055 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:25,055 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:25,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:47:25,056 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:47:25,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:25,058 INFO L85 PathProgramCache]: Analyzing trace with hash -856776642, now seen corresponding path program 1 times [2024-11-19 09:47:25,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:25,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970611158] [2024-11-19 09:47:25,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:25,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:25,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:25,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970611158] [2024-11-19 09:47:25,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970611158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:25,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528569359] [2024-11-19 09:47:25,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:25,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:25,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:25,285 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) [2024-11-19 09:47:25,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:47:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:25,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:47:25,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:25,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-19 09:47:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:25,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:25,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528569359] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:47:25,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:47:25,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-19 09:47:25,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393537303] [2024-11-19 09:47:25,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:47:25,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 09:47:25,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:25,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 09:47:25,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-19 09:47:26,502 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2024-11-19 09:47:26,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 180 flow. Second operand has 15 states, 15 states have (on average 50.8) internal successors, (762), 15 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:26,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:26,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2024-11-19 09:47:26,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:26,876 INFO L124 PetriNetUnfolderBase]: 444/949 cut-off events. [2024-11-19 09:47:26,877 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:47:26,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1617 conditions, 949 events. 444/949 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6052 event pairs, 254 based on Foata normal form. 0/583 useless extension candidates. Maximal degree in co-relation 1582. Up to 614 conditions per place. [2024-11-19 09:47:26,882 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 25 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2024-11-19 09:47:26,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 81 transitions, 262 flow [2024-11-19 09:47:26,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:47:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:47:26,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 529 transitions. [2024-11-19 09:47:26,885 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6297619047619047 [2024-11-19 09:47:26,885 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 180 flow. Second operand 10 states and 529 transitions. [2024-11-19 09:47:26,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 81 transitions, 262 flow [2024-11-19 09:47:26,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 81 transitions, 254 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:47:26,887 INFO L231 Difference]: Finished difference. Result has 85 places, 81 transitions, 204 flow [2024-11-19 09:47:26,887 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=204, PETRI_PLACES=85, PETRI_TRANSITIONS=81} [2024-11-19 09:47:26,887 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 1 predicate places. [2024-11-19 09:47:26,888 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 81 transitions, 204 flow [2024-11-19 09:47:26,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 50.8) internal successors, (762), 15 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:26,888 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:26,888 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:26,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 09:47:27,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:27,090 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:47:27,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:27,091 INFO L85 PathProgramCache]: Analyzing trace with hash -790271474, now seen corresponding path program 1 times [2024-11-19 09:47:27,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:27,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122945883] [2024-11-19 09:47:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:27,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:27,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:27,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122945883] [2024-11-19 09:47:27,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122945883] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:47:27,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:47:27,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:47:27,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032050434] [2024-11-19 09:47:27,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:27,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:47:27,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:27,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:47:27,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:47:27,203 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2024-11-19 09:47:27,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 81 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:27,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:27,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2024-11-19 09:47:27,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:27,395 INFO L124 PetriNetUnfolderBase]: 972/1695 cut-off events. [2024-11-19 09:47:27,396 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-19 09:47:27,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3117 conditions, 1695 events. 972/1695 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9879 event pairs, 700 based on Foata normal form. 0/1466 useless extension candidates. Maximal degree in co-relation 3059. Up to 1314 conditions per place. [2024-11-19 09:47:27,405 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 39 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2024-11-19 09:47:27,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 74 transitions, 274 flow [2024-11-19 09:47:27,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:47:27,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:47:27,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2024-11-19 09:47:27,406 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-19 09:47:27,406 INFO L175 Difference]: Start difference. First operand has 85 places, 81 transitions, 204 flow. Second operand 4 states and 192 transitions. [2024-11-19 09:47:27,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 74 transitions, 274 flow [2024-11-19 09:47:27,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 238 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-19 09:47:27,408 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 160 flow [2024-11-19 09:47:27,409 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-11-19 09:47:27,410 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -10 predicate places. [2024-11-19 09:47:27,410 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 160 flow [2024-11-19 09:47:27,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:27,410 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:27,410 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:27,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:47:27,411 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:47:27,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:27,411 INFO L85 PathProgramCache]: Analyzing trace with hash -790271473, now seen corresponding path program 1 times [2024-11-19 09:47:27,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:27,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131325822] [2024-11-19 09:47:27,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:27,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:27,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:27,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131325822] [2024-11-19 09:47:27,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131325822] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:27,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913448720] [2024-11-19 09:47:27,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:27,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:27,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:27,509 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) [2024-11-19 09:47:27,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:47:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:27,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-19 09:47:27,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:27,582 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 [2024-11-19 09:47:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:27,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:27,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913448720] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:27,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:47:27,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-19 09:47:27,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681007096] [2024-11-19 09:47:27,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:27,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:47:27,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:27,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:47:27,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-19 09:47:27,779 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 84 [2024-11-19 09:47:27,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 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) [2024-11-19 09:47:27,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:27,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 84 [2024-11-19 09:47:27,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:27,908 INFO L124 PetriNetUnfolderBase]: 602/1159 cut-off events. [2024-11-19 09:47:27,909 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:47:27,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2056 conditions, 1159 events. 602/1159 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7153 event pairs, 377 based on Foata normal form. 0/811 useless extension candidates. Maximal degree in co-relation 2014. Up to 835 conditions per place. [2024-11-19 09:47:27,916 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 34 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2024-11-19 09:47:27,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 230 flow [2024-11-19 09:47:27,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:47:27,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:47:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2024-11-19 09:47:27,918 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-11-19 09:47:27,918 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 160 flow. Second operand 5 states and 268 transitions. [2024-11-19 09:47:27,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 230 flow [2024-11-19 09:47:27,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:47:27,920 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 158 flow [2024-11-19 09:47:27,920 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-11-19 09:47:27,920 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -11 predicate places. [2024-11-19 09:47:27,921 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 158 flow [2024-11-19 09:47:27,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 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) [2024-11-19 09:47:27,921 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:27,921 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:27,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 09:47:28,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:28,126 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:47:28,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:28,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1366120631, now seen corresponding path program 1 times [2024-11-19 09:47:28,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:28,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042650677] [2024-11-19 09:47:28,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:28,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:28,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:28,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042650677] [2024-11-19 09:47:28,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042650677] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:47:28,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:47:28,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:47:28,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491213042] [2024-11-19 09:47:28,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:28,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:47:28,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:28,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:47:28,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:47:28,156 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2024-11-19 09:47:28,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:28,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:28,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2024-11-19 09:47:28,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:28,271 INFO L124 PetriNetUnfolderBase]: 443/876 cut-off events. [2024-11-19 09:47:28,271 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:47:28,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1540 conditions, 876 events. 443/876 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5277 event pairs, 254 based on Foata normal form. 1/583 useless extension candidates. Maximal degree in co-relation 1495. Up to 624 conditions per place. [2024-11-19 09:47:28,280 INFO L140 encePairwiseOnDemand]: 82/84 looper letters, 37 selfloop transitions, 0 changer transitions 1/71 dead transitions. [2024-11-19 09:47:28,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 234 flow [2024-11-19 09:47:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:47:28,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:47:28,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 181 transitions. [2024-11-19 09:47:28,281 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7182539682539683 [2024-11-19 09:47:28,281 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 158 flow. Second operand 3 states and 181 transitions. [2024-11-19 09:47:28,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 234 flow [2024-11-19 09:47:28,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 228 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:47:28,282 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 152 flow [2024-11-19 09:47:28,282 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-11-19 09:47:28,283 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -11 predicate places. [2024-11-19 09:47:28,283 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 152 flow [2024-11-19 09:47:28,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:28,283 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:28,283 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:28,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:47:28,284 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:47:28,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:28,284 INFO L85 PathProgramCache]: Analyzing trace with hash 787646930, now seen corresponding path program 1 times [2024-11-19 09:47:28,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:28,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877732376] [2024-11-19 09:47:28,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:28,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:28,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:28,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877732376] [2024-11-19 09:47:28,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877732376] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:47:28,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:47:28,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:47:28,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366746944] [2024-11-19 09:47:28,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:28,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:47:28,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:28,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:47:28,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:47:28,419 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2024-11-19 09:47:28,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 152 flow. Second operand has 6 states, 6 states have (on average 41.666666666666664) internal successors, (250), 6 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:28,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:28,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2024-11-19 09:47:28,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:28,722 INFO L124 PetriNetUnfolderBase]: 1756/2797 cut-off events. [2024-11-19 09:47:28,723 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-19 09:47:28,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5342 conditions, 2797 events. 1756/2797 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15972 event pairs, 885 based on Foata normal form. 0/2351 useless extension candidates. Maximal degree in co-relation 5338. Up to 1616 conditions per place. [2024-11-19 09:47:28,741 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 56 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2024-11-19 09:47:28,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 320 flow [2024-11-19 09:47:28,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:47:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:47:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 295 transitions. [2024-11-19 09:47:28,743 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5853174603174603 [2024-11-19 09:47:28,743 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 152 flow. Second operand 6 states and 295 transitions. [2024-11-19 09:47:28,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 320 flow [2024-11-19 09:47:28,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 89 transitions, 318 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-19 09:47:28,745 INFO L231 Difference]: Finished difference. Result has 77 places, 72 transitions, 181 flow [2024-11-19 09:47:28,746 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2024-11-19 09:47:28,746 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -7 predicate places. [2024-11-19 09:47:28,746 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 181 flow [2024-11-19 09:47:28,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.666666666666664) internal successors, (250), 6 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:28,747 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:28,747 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:28,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 09:47:28,747 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:47:28,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:28,748 INFO L85 PathProgramCache]: Analyzing trace with hash 677070547, now seen corresponding path program 1 times [2024-11-19 09:47:28,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:28,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806985286] [2024-11-19 09:47:28,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:28,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:28,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:28,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806985286] [2024-11-19 09:47:28,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806985286] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:28,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647244085] [2024-11-19 09:47:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:28,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:28,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:28,897 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) [2024-11-19 09:47:28,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:47:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:28,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 09:47:28,954 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:29,022 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:47:29,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647244085] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:47:29,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:47:29,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-11-19 09:47:29,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486643096] [2024-11-19 09:47:29,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:29,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:47:29,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:29,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:47:29,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:47:29,071 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 84 [2024-11-19 09:47:29,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 72 transitions, 181 flow. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:29,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:29,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 84 [2024-11-19 09:47:29,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:29,293 INFO L124 PetriNetUnfolderBase]: 1327/2403 cut-off events. [2024-11-19 09:47:29,293 INFO L125 PetriNetUnfolderBase]: For 188/268 co-relation queries the response was YES. [2024-11-19 09:47:29,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4823 conditions, 2403 events. 1327/2403 cut-off events. For 188/268 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15987 event pairs, 710 based on Foata normal form. 162/2203 useless extension candidates. Maximal degree in co-relation 4818. Up to 1332 conditions per place. [2024-11-19 09:47:29,305 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 55 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2024-11-19 09:47:29,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 88 transitions, 343 flow [2024-11-19 09:47:29,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:47:29,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:47:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 224 transitions. [2024-11-19 09:47:29,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-19 09:47:29,307 INFO L175 Difference]: Start difference. First operand has 77 places, 72 transitions, 181 flow. Second operand 4 states and 224 transitions. [2024-11-19 09:47:29,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 88 transitions, 343 flow [2024-11-19 09:47:29,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 88 transitions, 328 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:47:29,309 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 191 flow [2024-11-19 09:47:29,309 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=191, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2024-11-19 09:47:29,310 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -7 predicate places. [2024-11-19 09:47:29,310 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 191 flow [2024-11-19 09:47:29,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:29,310 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:29,310 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:29,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:47:29,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:29,512 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:47:29,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:29,512 INFO L85 PathProgramCache]: Analyzing trace with hash -52194088, now seen corresponding path program 1 times [2024-11-19 09:47:29,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:29,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405082703] [2024-11-19 09:47:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:29,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:29,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:29,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405082703] [2024-11-19 09:47:29,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405082703] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:29,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772722474] [2024-11-19 09:47:29,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:29,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:29,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:29,628 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) [2024-11-19 09:47:29,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:47:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:29,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:47:29,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:29,784 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:29,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772722474] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:47:29,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:47:29,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-19 09:47:29,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309449175] [2024-11-19 09:47:29,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:47:29,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:47:29,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:29,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:47:29,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:47:29,921 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 84 [2024-11-19 09:47:29,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 191 flow. Second operand has 14 states, 14 states have (on average 50.57142857142857) internal successors, (708), 14 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:29,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:29,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 84 [2024-11-19 09:47:29,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:30,262 INFO L124 PetriNetUnfolderBase]: 1834/3405 cut-off events. [2024-11-19 09:47:30,262 INFO L125 PetriNetUnfolderBase]: For 442/506 co-relation queries the response was YES. [2024-11-19 09:47:30,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7291 conditions, 3405 events. 1834/3405 cut-off events. For 442/506 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 24506 event pairs, 976 based on Foata normal form. 108/3023 useless extension candidates. Maximal degree in co-relation 7285. Up to 1457 conditions per place. [2024-11-19 09:47:30,280 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 81 selfloop transitions, 12 changer transitions 0/124 dead transitions. [2024-11-19 09:47:30,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 124 transitions, 527 flow [2024-11-19 09:47:30,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:47:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:47:30,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 468 transitions. [2024-11-19 09:47:30,282 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-11-19 09:47:30,282 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 191 flow. Second operand 8 states and 468 transitions. [2024-11-19 09:47:30,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 124 transitions, 527 flow [2024-11-19 09:47:30,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 124 transitions, 514 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:47:30,284 INFO L231 Difference]: Finished difference. Result has 85 places, 78 transitions, 247 flow [2024-11-19 09:47:30,284 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=247, PETRI_PLACES=85, PETRI_TRANSITIONS=78} [2024-11-19 09:47:30,285 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 1 predicate places. [2024-11-19 09:47:30,285 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 78 transitions, 247 flow [2024-11-19 09:47:30,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 50.57142857142857) internal successors, (708), 14 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:30,285 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:30,286 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:30,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:47:30,486 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 [2024-11-19 09:47:30,486 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:47:30,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:30,487 INFO L85 PathProgramCache]: Analyzing trace with hash -606544039, now seen corresponding path program 2 times [2024-11-19 09:47:30,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:30,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504059039] [2024-11-19 09:47:30,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:47:30,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:30,506 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:47:30,507 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:47:30,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:30,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504059039] [2024-11-19 09:47:30,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504059039] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:30,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883150802] [2024-11-19 09:47:30,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:47:30,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:30,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:30,789 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) [2024-11-19 09:47:30,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:47:30,846 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:47:30,846 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:30,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:47:30,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:31,003 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:31,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-19 09:47:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:31,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883150802] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:47:31,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:47:31,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2024-11-19 09:47:31,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569066667] [2024-11-19 09:47:31,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:47:31,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-19 09:47:31,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:31,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-19 09:47:31,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2024-11-19 09:47:32,119 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2024-11-19 09:47:32,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 78 transitions, 247 flow. Second operand has 22 states, 22 states have (on average 39.77272727272727) internal successors, (875), 22 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:32,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:32,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2024-11-19 09:47:32,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:33,519 INFO L124 PetriNetUnfolderBase]: 5525/8217 cut-off events. [2024-11-19 09:47:33,519 INFO L125 PetriNetUnfolderBase]: For 2082/2395 co-relation queries the response was YES. [2024-11-19 09:47:33,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19451 conditions, 8217 events. 5525/8217 cut-off events. For 2082/2395 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 49636 event pairs, 764 based on Foata normal form. 459/7885 useless extension candidates. Maximal degree in co-relation 19442. Up to 1364 conditions per place. [2024-11-19 09:47:33,560 INFO L140 encePairwiseOnDemand]: 68/84 looper letters, 175 selfloop transitions, 25 changer transitions 0/223 dead transitions. [2024-11-19 09:47:33,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 223 transitions, 1037 flow [2024-11-19 09:47:33,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 09:47:33,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-19 09:47:33,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 777 transitions. [2024-11-19 09:47:33,564 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-11-19 09:47:33,564 INFO L175 Difference]: Start difference. First operand has 85 places, 78 transitions, 247 flow. Second operand 16 states and 777 transitions. [2024-11-19 09:47:33,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 223 transitions, 1037 flow [2024-11-19 09:47:33,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 223 transitions, 1022 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-19 09:47:33,571 INFO L231 Difference]: Finished difference. Result has 96 places, 84 transitions, 326 flow [2024-11-19 09:47:33,571 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=326, PETRI_PLACES=96, PETRI_TRANSITIONS=84} [2024-11-19 09:47:33,572 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 12 predicate places. [2024-11-19 09:47:33,573 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 84 transitions, 326 flow [2024-11-19 09:47:33,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 39.77272727272727) internal successors, (875), 22 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:33,573 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:33,574 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:33,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:47:33,774 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 [2024-11-19 09:47:33,775 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:47:33,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:33,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1774014041, now seen corresponding path program 1 times [2024-11-19 09:47:33,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:33,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110405883] [2024-11-19 09:47:33,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:33,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:33,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:33,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110405883] [2024-11-19 09:47:33,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110405883] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:33,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15140962] [2024-11-19 09:47:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:33,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:33,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:33,882 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) [2024-11-19 09:47:33,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:47:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:33,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:47:33,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:34,005 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:34,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15140962] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:47:34,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:47:34,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-19 09:47:34,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394419434] [2024-11-19 09:47:34,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:47:34,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:47:34,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:34,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:47:34,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:47:34,187 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 84 [2024-11-19 09:47:34,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 84 transitions, 326 flow. Second operand has 14 states, 14 states have (on average 50.714285714285715) internal successors, (710), 14 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:34,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:34,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 84 [2024-11-19 09:47:34,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:34,522 INFO L124 PetriNetUnfolderBase]: 2558/4482 cut-off events. [2024-11-19 09:47:34,523 INFO L125 PetriNetUnfolderBase]: For 3506/3533 co-relation queries the response was YES. [2024-11-19 09:47:34,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11515 conditions, 4482 events. 2558/4482 cut-off events. For 3506/3533 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 30261 event pairs, 1460 based on Foata normal form. 46/3886 useless extension candidates. Maximal degree in co-relation 11504. Up to 2355 conditions per place. [2024-11-19 09:47:34,545 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 81 selfloop transitions, 12 changer transitions 0/128 dead transitions. [2024-11-19 09:47:34,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 128 transitions, 680 flow [2024-11-19 09:47:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:47:34,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:47:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 466 transitions. [2024-11-19 09:47:34,546 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6934523809523809 [2024-11-19 09:47:34,546 INFO L175 Difference]: Start difference. First operand has 96 places, 84 transitions, 326 flow. Second operand 8 states and 466 transitions. [2024-11-19 09:47:34,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 128 transitions, 680 flow [2024-11-19 09:47:34,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 128 transitions, 568 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-11-19 09:47:34,552 INFO L231 Difference]: Finished difference. Result has 93 places, 88 transitions, 315 flow [2024-11-19 09:47:34,552 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=315, PETRI_PLACES=93, PETRI_TRANSITIONS=88} [2024-11-19 09:47:34,553 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 9 predicate places. [2024-11-19 09:47:34,553 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 88 transitions, 315 flow [2024-11-19 09:47:34,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 50.714285714285715) internal successors, (710), 14 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:34,553 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:34,553 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:34,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 09:47:34,754 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 [2024-11-19 09:47:34,754 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:47:34,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:34,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1619655834, now seen corresponding path program 2 times [2024-11-19 09:47:34,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:34,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001764818] [2024-11-19 09:47:34,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:47:34,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:34,767 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:47:34,767 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:47:34,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:34,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001764818] [2024-11-19 09:47:34,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001764818] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:34,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334900425] [2024-11-19 09:47:34,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:47:34,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:34,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:34,939 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) [2024-11-19 09:47:34,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:47:35,002 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:47:35,003 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:35,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 09:47:35,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:35,010 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 [2024-11-19 09:47:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:47:35,135 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:47:35,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334900425] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:47:35,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:47:35,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-19 09:47:35,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063940733] [2024-11-19 09:47:35,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:47:35,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 09:47:35,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:35,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 09:47:35,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2024-11-19 09:47:35,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2024-11-19 09:47:35,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 88 transitions, 315 flow. Second operand has 20 states, 20 states have (on average 40.05) internal successors, (801), 20 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:35,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:35,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2024-11-19 09:47:35,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:37,076 INFO L124 PetriNetUnfolderBase]: 5774/8669 cut-off events. [2024-11-19 09:47:37,077 INFO L125 PetriNetUnfolderBase]: For 3560/3707 co-relation queries the response was YES. [2024-11-19 09:47:37,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22011 conditions, 8669 events. 5774/8669 cut-off events. For 3560/3707 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 52085 event pairs, 890 based on Foata normal form. 280/8069 useless extension candidates. Maximal degree in co-relation 22000. Up to 3067 conditions per place. [2024-11-19 09:47:37,110 INFO L140 encePairwiseOnDemand]: 71/84 looper letters, 148 selfloop transitions, 21 changer transitions 0/193 dead transitions. [2024-11-19 09:47:37,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 193 transitions, 1018 flow [2024-11-19 09:47:37,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:47:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:47:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 484 transitions. [2024-11-19 09:47:37,114 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-11-19 09:47:37,114 INFO L175 Difference]: Start difference. First operand has 93 places, 88 transitions, 315 flow. Second operand 10 states and 484 transitions. [2024-11-19 09:47:37,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 193 transitions, 1018 flow [2024-11-19 09:47:37,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 193 transitions, 1003 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-19 09:47:37,132 INFO L231 Difference]: Finished difference. Result has 97 places, 93 transitions, 378 flow [2024-11-19 09:47:37,132 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=378, PETRI_PLACES=97, PETRI_TRANSITIONS=93} [2024-11-19 09:47:37,133 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 13 predicate places. [2024-11-19 09:47:37,133 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 93 transitions, 378 flow [2024-11-19 09:47:37,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 40.05) internal successors, (801), 20 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:37,137 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:37,137 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:37,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 09:47:37,338 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 [2024-11-19 09:47:37,338 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:47:37,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:37,339 INFO L85 PathProgramCache]: Analyzing trace with hash -788636757, now seen corresponding path program 1 times [2024-11-19 09:47:37,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:37,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963340708] [2024-11-19 09:47:37,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:37,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:37,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:37,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963340708] [2024-11-19 09:47:37,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963340708] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:47:37,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:47:37,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:47:37,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252928393] [2024-11-19 09:47:37,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:37,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:47:37,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:37,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:47:37,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:47:37,528 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2024-11-19 09:47:37,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 93 transitions, 378 flow. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:37,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:37,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2024-11-19 09:47:37,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:38,018 INFO L124 PetriNetUnfolderBase]: 2827/5071 cut-off events. [2024-11-19 09:47:38,019 INFO L125 PetriNetUnfolderBase]: For 4465/4625 co-relation queries the response was YES. [2024-11-19 09:47:38,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13703 conditions, 5071 events. 2827/5071 cut-off events. For 4465/4625 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 35629 event pairs, 1420 based on Foata normal form. 197/4258 useless extension candidates. Maximal degree in co-relation 13691. Up to 2381 conditions per place. [2024-11-19 09:47:38,077 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 65 selfloop transitions, 5 changer transitions 0/109 dead transitions. [2024-11-19 09:47:38,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 109 transitions, 605 flow [2024-11-19 09:47:38,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:47:38,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:47:38,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 243 transitions. [2024-11-19 09:47:38,079 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7232142857142857 [2024-11-19 09:47:38,079 INFO L175 Difference]: Start difference. First operand has 97 places, 93 transitions, 378 flow. Second operand 4 states and 243 transitions. [2024-11-19 09:47:38,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 109 transitions, 605 flow [2024-11-19 09:47:38,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 109 transitions, 549 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-19 09:47:38,104 INFO L231 Difference]: Finished difference. Result has 94 places, 90 transitions, 337 flow [2024-11-19 09:47:38,104 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=337, PETRI_PLACES=94, PETRI_TRANSITIONS=90} [2024-11-19 09:47:38,104 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 10 predicate places. [2024-11-19 09:47:38,105 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 90 transitions, 337 flow [2024-11-19 09:47:38,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:38,105 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:38,105 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:38,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 09:47:38,105 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:47:38,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:38,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1993966815, now seen corresponding path program 1 times [2024-11-19 09:47:38,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:38,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420024556] [2024-11-19 09:47:38,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:38,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:38,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:38,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420024556] [2024-11-19 09:47:38,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420024556] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:47:38,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:47:38,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:47:38,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450714004] [2024-11-19 09:47:38,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:38,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:47:38,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:38,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:47:38,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:47:38,174 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2024-11-19 09:47:38,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 90 transitions, 337 flow. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:38,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:38,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2024-11-19 09:47:38,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:38,438 INFO L124 PetriNetUnfolderBase]: 2345/4419 cut-off events. [2024-11-19 09:47:38,438 INFO L125 PetriNetUnfolderBase]: For 3237/3349 co-relation queries the response was YES. [2024-11-19 09:47:38,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10869 conditions, 4419 events. 2345/4419 cut-off events. For 3237/3349 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 31348 event pairs, 969 based on Foata normal form. 332/4038 useless extension candidates. Maximal degree in co-relation 10858. Up to 1486 conditions per place. [2024-11-19 09:47:38,463 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 58 selfloop transitions, 5 changer transitions 0/102 dead transitions. [2024-11-19 09:47:38,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 102 transitions, 492 flow [2024-11-19 09:47:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:47:38,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:47:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 242 transitions. [2024-11-19 09:47:38,465 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7202380952380952 [2024-11-19 09:47:38,465 INFO L175 Difference]: Start difference. First operand has 94 places, 90 transitions, 337 flow. Second operand 4 states and 242 transitions. [2024-11-19 09:47:38,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 102 transitions, 492 flow [2024-11-19 09:47:38,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 102 transitions, 478 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:47:38,472 INFO L231 Difference]: Finished difference. Result has 93 places, 86 transitions, 307 flow [2024-11-19 09:47:38,472 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=307, PETRI_PLACES=93, PETRI_TRANSITIONS=86} [2024-11-19 09:47:38,473 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 9 predicate places. [2024-11-19 09:47:38,473 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 86 transitions, 307 flow [2024-11-19 09:47:38,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:38,473 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:38,473 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:38,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-19 09:47:38,473 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:47:38,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:38,474 INFO L85 PathProgramCache]: Analyzing trace with hash -811792249, now seen corresponding path program 1 times [2024-11-19 09:47:38,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:38,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716595603] [2024-11-19 09:47:38,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:38,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:38,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:38,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716595603] [2024-11-19 09:47:38,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716595603] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:38,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770547399] [2024-11-19 09:47:38,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:38,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:38,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:38,659 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) [2024-11-19 09:47:38,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:47:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:38,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:47:38,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:47:38,774 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:47:38,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770547399] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:47:38,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:47:38,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2024-11-19 09:47:38,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284392794] [2024-11-19 09:47:38,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:38,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:47:38,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:38,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:47:38,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:47:38,853 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 84 [2024-11-19 09:47:38,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 86 transitions, 307 flow. Second operand has 6 states, 6 states have (on average 49.833333333333336) internal successors, (299), 6 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) [2024-11-19 09:47:38,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:38,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 84 [2024-11-19 09:47:38,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:39,260 INFO L124 PetriNetUnfolderBase]: 3206/5692 cut-off events. [2024-11-19 09:47:39,260 INFO L125 PetriNetUnfolderBase]: For 3826/4027 co-relation queries the response was YES. [2024-11-19 09:47:39,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14270 conditions, 5692 events. 3206/5692 cut-off events. For 3826/4027 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 39371 event pairs, 1347 based on Foata normal form. 2/4941 useless extension candidates. Maximal degree in co-relation 14259. Up to 2725 conditions per place. [2024-11-19 09:47:39,289 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 113 selfloop transitions, 10 changer transitions 0/155 dead transitions. [2024-11-19 09:47:39,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 155 transitions, 826 flow [2024-11-19 09:47:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:47:39,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:47:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 400 transitions. [2024-11-19 09:47:39,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6802721088435374 [2024-11-19 09:47:39,290 INFO L175 Difference]: Start difference. First operand has 93 places, 86 transitions, 307 flow. Second operand 7 states and 400 transitions. [2024-11-19 09:47:39,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 155 transitions, 826 flow [2024-11-19 09:47:39,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 155 transitions, 796 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:47:39,297 INFO L231 Difference]: Finished difference. Result has 98 places, 90 transitions, 349 flow [2024-11-19 09:47:39,297 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=349, PETRI_PLACES=98, PETRI_TRANSITIONS=90} [2024-11-19 09:47:39,298 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 14 predicate places. [2024-11-19 09:47:39,298 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 90 transitions, 349 flow [2024-11-19 09:47:39,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.833333333333336) internal successors, (299), 6 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) [2024-11-19 09:47:39,298 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:39,298 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:39,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 09:47:39,499 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,SelfDestructingSolverStorable14 [2024-11-19 09:47:39,499 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:47:39,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:39,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1603314530, now seen corresponding path program 1 times [2024-11-19 09:47:39,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:39,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046042161] [2024-11-19 09:47:39,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:39,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:47:39,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:39,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046042161] [2024-11-19 09:47:39,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046042161] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:39,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211322887] [2024-11-19 09:47:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:39,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:39,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:39,690 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) [2024-11-19 09:47:39,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:47:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:39,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:47:39,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:39,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 09:47:39,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 09:47:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:39,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:47:39,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211322887] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:39,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:47:39,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 7] total 10 [2024-11-19 09:47:39,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240669696] [2024-11-19 09:47:39,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:39,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:47:39,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:39,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:47:39,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:47:39,978 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 84 [2024-11-19 09:47:39,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 90 transitions, 349 flow. Second operand has 6 states, 6 states have (on average 49.833333333333336) internal successors, (299), 6 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) [2024-11-19 09:47:39,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:39,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 84 [2024-11-19 09:47:39,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:40,532 INFO L124 PetriNetUnfolderBase]: 2798/5086 cut-off events. [2024-11-19 09:47:40,532 INFO L125 PetriNetUnfolderBase]: For 3818/4042 co-relation queries the response was YES. [2024-11-19 09:47:40,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13752 conditions, 5086 events. 2798/5086 cut-off events. For 3818/4042 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 34858 event pairs, 918 based on Foata normal form. 138/4710 useless extension candidates. Maximal degree in co-relation 13739. Up to 1784 conditions per place. [2024-11-19 09:47:40,563 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 123 selfloop transitions, 10 changer transitions 0/168 dead transitions. [2024-11-19 09:47:40,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 168 transitions, 928 flow [2024-11-19 09:47:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:47:40,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:47:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 395 transitions. [2024-11-19 09:47:40,567 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6717687074829932 [2024-11-19 09:47:40,568 INFO L175 Difference]: Start difference. First operand has 98 places, 90 transitions, 349 flow. Second operand 7 states and 395 transitions. [2024-11-19 09:47:40,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 168 transitions, 928 flow [2024-11-19 09:47:40,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 168 transitions, 917 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:47:40,580 INFO L231 Difference]: Finished difference. Result has 102 places, 93 transitions, 383 flow [2024-11-19 09:47:40,580 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=383, PETRI_PLACES=102, PETRI_TRANSITIONS=93} [2024-11-19 09:47:40,580 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 18 predicate places. [2024-11-19 09:47:40,580 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 93 transitions, 383 flow [2024-11-19 09:47:40,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.833333333333336) internal successors, (299), 6 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) [2024-11-19 09:47:40,581 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:40,581 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:40,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 09:47:40,785 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,SelfDestructingSolverStorable15 [2024-11-19 09:47:40,786 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:47:40,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:40,786 INFO L85 PathProgramCache]: Analyzing trace with hash 908483081, now seen corresponding path program 1 times [2024-11-19 09:47:40,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:40,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568203171] [2024-11-19 09:47:40,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:40,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:47:41,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:41,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568203171] [2024-11-19 09:47:41,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568203171] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:41,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905087525] [2024-11-19 09:47:41,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:41,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:41,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:41,043 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) [2024-11-19 09:47:41,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:47:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:41,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 09:47:41,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:47:41,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:47:41,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905087525] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:47:41,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:47:41,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 12 [2024-11-19 09:47:41,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35902358] [2024-11-19 09:47:41,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:47:41,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 09:47:41,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:41,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 09:47:41,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:47:41,512 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 84 [2024-11-19 09:47:41,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 93 transitions, 383 flow. Second operand has 12 states, 12 states have (on average 42.5) internal successors, (510), 12 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:41,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:41,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 84 [2024-11-19 09:47:41,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:42,480 INFO L124 PetriNetUnfolderBase]: 6439/11554 cut-off events. [2024-11-19 09:47:42,480 INFO L125 PetriNetUnfolderBase]: For 8993/9381 co-relation queries the response was YES. [2024-11-19 09:47:42,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32977 conditions, 11554 events. 6439/11554 cut-off events. For 8993/9381 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 85334 event pairs, 1280 based on Foata normal form. 251/10911 useless extension candidates. Maximal degree in co-relation 32962. Up to 5313 conditions per place. [2024-11-19 09:47:42,535 INFO L140 encePairwiseOnDemand]: 70/84 looper letters, 120 selfloop transitions, 24 changer transitions 54/227 dead transitions. [2024-11-19 09:47:42,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 227 transitions, 1281 flow [2024-11-19 09:47:42,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 09:47:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-19 09:47:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 669 transitions. [2024-11-19 09:47:42,541 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.530952380952381 [2024-11-19 09:47:42,542 INFO L175 Difference]: Start difference. First operand has 102 places, 93 transitions, 383 flow. Second operand 15 states and 669 transitions. [2024-11-19 09:47:42,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 227 transitions, 1281 flow [2024-11-19 09:47:42,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 227 transitions, 1259 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:47:42,583 INFO L231 Difference]: Finished difference. Result has 117 places, 107 transitions, 489 flow [2024-11-19 09:47:42,583 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=489, PETRI_PLACES=117, PETRI_TRANSITIONS=107} [2024-11-19 09:47:42,583 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 33 predicate places. [2024-11-19 09:47:42,583 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 107 transitions, 489 flow [2024-11-19 09:47:42,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 42.5) internal successors, (510), 12 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:42,584 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:42,584 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:47:42,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 09:47:42,788 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,SelfDestructingSolverStorable16 [2024-11-19 09:47:42,789 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:47:42,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:42,789 INFO L85 PathProgramCache]: Analyzing trace with hash -131756939, now seen corresponding path program 2 times [2024-11-19 09:47:42,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:42,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795279580] [2024-11-19 09:47:42,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:47:42,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:42,826 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:47:42,826 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:43,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:43,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795279580] [2024-11-19 09:47:43,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795279580] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:47:43,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545653300] [2024-11-19 09:47:43,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:47:43,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:47:43,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:43,134 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) [2024-11-19 09:47:43,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 09:47:43,211 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:47:43,211 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:47:43,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:47:43,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:47:43,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 09:47:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:43,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:47:43,514 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:47:43,515 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 17 treesize of output 9 [2024-11-19 09:47:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:47:43,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545653300] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:47:43,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:47:43,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 9] total 25 [2024-11-19 09:47:43,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049507780] [2024-11-19 09:47:43,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:47:43,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-19 09:47:43,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:43,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-19 09:47:43,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2024-11-19 09:47:44,886 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 84 [2024-11-19 09:47:44,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 107 transitions, 489 flow. Second operand has 25 states, 25 states have (on average 33.88) internal successors, (847), 25 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:44,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:44,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 84 [2024-11-19 09:47:44,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:48:03,166 INFO L124 PetriNetUnfolderBase]: 53473/81966 cut-off events. [2024-11-19 09:48:03,167 INFO L125 PetriNetUnfolderBase]: For 89019/90003 co-relation queries the response was YES. [2024-11-19 09:48:03,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248492 conditions, 81966 events. 53473/81966 cut-off events. For 89019/90003 co-relation queries the response was YES. Maximal size of possible extension queue 1574. Compared 617831 event pairs, 725 based on Foata normal form. 126/78847 useless extension candidates. Maximal degree in co-relation 248472. Up to 10763 conditions per place. [2024-11-19 09:48:03,642 INFO L140 encePairwiseOnDemand]: 57/84 looper letters, 971 selfloop transitions, 455 changer transitions 1093/2531 dead transitions. [2024-11-19 09:48:03,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 2531 transitions, 15644 flow [2024-11-19 09:48:03,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2024-11-19 09:48:03,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2024-11-19 09:48:03,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 9095 transitions. [2024-11-19 09:48:03,670 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44926891918593165 [2024-11-19 09:48:03,670 INFO L175 Difference]: Start difference. First operand has 117 places, 107 transitions, 489 flow. Second operand 241 states and 9095 transitions. [2024-11-19 09:48:03,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 2531 transitions, 15644 flow [2024-11-19 09:48:04,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 2531 transitions, 15635 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:48:04,683 INFO L231 Difference]: Finished difference. Result has 509 places, 644 transitions, 5634 flow [2024-11-19 09:48:04,687 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=241, PETRI_FLOW=5634, PETRI_PLACES=509, PETRI_TRANSITIONS=644} [2024-11-19 09:48:04,687 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 425 predicate places. [2024-11-19 09:48:04,688 INFO L471 AbstractCegarLoop]: Abstraction has has 509 places, 644 transitions, 5634 flow [2024-11-19 09:48:04,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 33.88) internal successors, (847), 25 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:04,689 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:48:04,689 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:48:04,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 09:48:04,908 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,SelfDestructingSolverStorable17 [2024-11-19 09:48:04,908 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:48:04,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:48:04,909 INFO L85 PathProgramCache]: Analyzing trace with hash -2016139771, now seen corresponding path program 3 times [2024-11-19 09:48:04,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:48:04,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325886519] [2024-11-19 09:48:04,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:48:04,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:48:04,921 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-19 09:48:04,921 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:48:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 09:48:05,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:48:05,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325886519] [2024-11-19 09:48:05,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325886519] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:48:05,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:48:05,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-19 09:48:05,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725700082] [2024-11-19 09:48:05,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:48:05,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:48:05,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:48:05,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:48:05,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:48:05,261 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2024-11-19 09:48:05,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 644 transitions, 5634 flow. Second operand has 7 states, 7 states have (on average 44.857142857142854) internal successors, (314), 7 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:05,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:48:05,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2024-11-19 09:48:05,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:48:16,538 INFO L124 PetriNetUnfolderBase]: 20771/36144 cut-off events. [2024-11-19 09:48:16,538 INFO L125 PetriNetUnfolderBase]: For 3812113/3815706 co-relation queries the response was YES. [2024-11-19 09:48:17,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271838 conditions, 36144 events. 20771/36144 cut-off events. For 3812113/3815706 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 298556 event pairs, 7176 based on Foata normal form. 624/35540 useless extension candidates. Maximal degree in co-relation 271661. Up to 19968 conditions per place. [2024-11-19 09:48:17,580 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 524 selfloop transitions, 49 changer transitions 224/996 dead transitions. [2024-11-19 09:48:17,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 996 transitions, 10296 flow [2024-11-19 09:48:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 09:48:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 09:48:17,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 554 transitions. [2024-11-19 09:48:17,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5995670995670995 [2024-11-19 09:48:17,582 INFO L175 Difference]: Start difference. First operand has 509 places, 644 transitions, 5634 flow. Second operand 11 states and 554 transitions. [2024-11-19 09:48:17,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 996 transitions, 10296 flow [2024-11-19 09:48:27,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 996 transitions, 8876 flow, removed 519 selfloop flow, removed 53 redundant places. [2024-11-19 09:48:27,266 INFO L231 Difference]: Finished difference. Result has 380 places, 676 transitions, 5389 flow [2024-11-19 09:48:27,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=4751, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5389, PETRI_PLACES=380, PETRI_TRANSITIONS=676} [2024-11-19 09:48:27,267 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 296 predicate places. [2024-11-19 09:48:27,267 INFO L471 AbstractCegarLoop]: Abstraction has has 380 places, 676 transitions, 5389 flow [2024-11-19 09:48:27,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 44.857142857142854) internal successors, (314), 7 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:27,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:48:27,268 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:48:27,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-19 09:48:27,268 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-19 09:48:27,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:48:27,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1429737931, now seen corresponding path program 4 times [2024-11-19 09:48:27,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:48:27,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685627150] [2024-11-19 09:48:27,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:48:27,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:48:27,289 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:48:27,289 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:48:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:48:27,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:48:27,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685627150] [2024-11-19 09:48:27,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685627150] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:48:27,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946042025] [2024-11-19 09:48:27,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:48:27,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:48:27,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:48:27,455 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) [2024-11-19 09:48:27,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 09:48:27,523 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:48:27,524 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:48:27,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 09:48:27,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:48:27,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 09:48:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:48:27,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:48:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:48:27,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946042025] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:48:27,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:48:27,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 21 [2024-11-19 09:48:27,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368820414] [2024-11-19 09:48:27,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:48:27,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 09:48:27,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:48:27,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 09:48:27,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2024-11-19 09:48:28,681 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 84 [2024-11-19 09:48:28,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 676 transitions, 5389 flow. Second operand has 21 states, 21 states have (on average 37.19047619047619) internal successors, (781), 21 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:28,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:48:28,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 84 [2024-11-19 09:48:28,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:48:46,186 INFO L124 PetriNetUnfolderBase]: 37454/61347 cut-off events. [2024-11-19 09:48:46,187 INFO L125 PetriNetUnfolderBase]: For 5872420/5876968 co-relation queries the response was YES. [2024-11-19 09:48:47,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404269 conditions, 61347 events. 37454/61347 cut-off events. For 5872420/5876968 co-relation queries the response was YES. Maximal size of possible extension queue 1238. Compared 493668 event pairs, 4173 based on Foata normal form. 538/60708 useless extension candidates. Maximal degree in co-relation 404128. Up to 18420 conditions per place. [2024-11-19 09:48:47,295 INFO L140 encePairwiseOnDemand]: 64/84 looper letters, 848 selfloop transitions, 340 changer transitions 456/1746 dead transitions. [2024-11-19 09:48:47,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1746 transitions, 18171 flow [2024-11-19 09:48:47,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-11-19 09:48:47,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-11-19 09:48:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 3375 transitions. [2024-11-19 09:48:47,299 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46719269102990035 [2024-11-19 09:48:47,299 INFO L175 Difference]: Start difference. First operand has 380 places, 676 transitions, 5389 flow. Second operand 86 states and 3375 transitions. [2024-11-19 09:48:47,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1746 transitions, 18171 flow