./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-series3.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/popl20-more-buffer-series3.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 c031a4ce44fce05276ee0c322906dbff86776176e55e116d257d2b83e85a253c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:51:18,867 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:51:18,942 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:51:18,948 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:51:18,951 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:51:18,979 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:51:18,979 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:51:18,980 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:51:18,980 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:51:18,981 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:51:18,981 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:51:18,981 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:51:18,982 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:51:18,985 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:51:18,985 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:51:18,985 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:51:18,986 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:51:18,986 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:51:18,986 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:51:18,986 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:51:18,987 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:51:18,989 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:51:18,989 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:51:18,989 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:51:18,990 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:51:18,990 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:51:18,990 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:51:18,991 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:51:18,991 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:51:18,991 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:51:18,991 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:51:18,992 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:51:18,992 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:51:18,992 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:51:18,993 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:51:18,993 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:51:18,993 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:51:18,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:51:18,994 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:51:18,994 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:51:18,994 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:51:18,995 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:51:18,995 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c031a4ce44fce05276ee0c322906dbff86776176e55e116d257d2b83e85a253c [2024-11-19 09:51:19,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:51:19,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:51:19,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:51:19,327 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:51:19,328 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:51:19,329 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c [2024-11-19 09:51:20,704 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:51:20,908 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:51:20,909 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c [2024-11-19 09:51:20,920 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edfe3ba37/b919e2c53a8945c98f377fba75ffc5d4/FLAG0c224d622 [2024-11-19 09:51:20,940 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edfe3ba37/b919e2c53a8945c98f377fba75ffc5d4 [2024-11-19 09:51:20,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:51:20,946 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:51:20,947 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:51:20,947 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:51:20,953 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:51:20,954 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:51:20" (1/1) ... [2024-11-19 09:51:20,955 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7263ea4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:20, skipping insertion in model container [2024-11-19 09:51:20,957 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:51:20" (1/1) ... [2024-11-19 09:51:20,987 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:51:21,251 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 09:51:21,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:51:21,270 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:51:21,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:51:21,325 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:51:21,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:21 WrapperNode [2024-11-19 09:51:21,325 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:51:21,326 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:51:21,326 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:51:21,326 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:51:21,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:21" (1/1) ... [2024-11-19 09:51:21,344 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:21" (1/1) ... [2024-11-19 09:51:21,387 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 342 [2024-11-19 09:51:21,387 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:51:21,388 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:51:21,388 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:51:21,388 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:51:21,400 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:21" (1/1) ... [2024-11-19 09:51:21,400 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:21" (1/1) ... [2024-11-19 09:51:21,410 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:21" (1/1) ... [2024-11-19 09:51:21,448 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-19 09:51:21,449 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:21" (1/1) ... [2024-11-19 09:51:21,449 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:21" (1/1) ... [2024-11-19 09:51:21,459 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:21" (1/1) ... [2024-11-19 09:51:21,464 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:21" (1/1) ... [2024-11-19 09:51:21,468 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:21" (1/1) ... [2024-11-19 09:51:21,470 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:21" (1/1) ... [2024-11-19 09:51:21,474 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:51:21,479 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:51:21,479 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:51:21,480 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:51:21,480 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:21" (1/1) ... [2024-11-19 09:51:21,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:51:21,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:21,532 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 09:51:21,534 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 09:51:21,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:51:21,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:51:21,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:51:21,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:51:21,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:51:21,578 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:51:21,578 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:51:21,578 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:51:21,578 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:51:21,578 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:51:21,579 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:51:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-19 09:51:21,579 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-19 09:51:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:51:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:51:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 09:51:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 09:51:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:51:21,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:51:21,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:51:21,582 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 09:51:21,693 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:51:21,696 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:51:22,283 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:51:22,283 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:51:22,694 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:51:22,695 INFO L316 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-19 09:51:22,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:51:22 BoogieIcfgContainer [2024-11-19 09:51:22,696 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:51:22,698 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:51:22,699 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:51:22,702 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:51:22,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:51:20" (1/3) ... [2024-11-19 09:51:22,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f1a315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:51:22, skipping insertion in model container [2024-11-19 09:51:22,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:21" (2/3) ... [2024-11-19 09:51:22,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f1a315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:51:22, skipping insertion in model container [2024-11-19 09:51:22,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:51:22" (3/3) ... [2024-11-19 09:51:22,705 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series3.wvr.c [2024-11-19 09:51:22,723 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:51:22,723 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-19 09:51:22,724 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:51:22,823 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-19 09:51:22,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 77 transitions, 182 flow [2024-11-19 09:51:22,899 INFO L124 PetriNetUnfolderBase]: 7/73 cut-off events. [2024-11-19 09:51:22,900 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-19 09:51:22,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 73 events. 7/73 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 190 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2024-11-19 09:51:22,906 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 77 transitions, 182 flow [2024-11-19 09:51:22,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 72 transitions, 168 flow [2024-11-19 09:51:22,923 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:51:22,931 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;@1392fc7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:51:22,932 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-19 09:51:22,935 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:51:22,935 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:51:22,935 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:51:22,936 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:22,936 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:51:22,937 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:22,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:22,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1037210, now seen corresponding path program 1 times [2024-11-19 09:51:22,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:22,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367821720] [2024-11-19 09:51:22,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:22,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:23,255 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 09:51:23,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:23,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367821720] [2024-11-19 09:51:23,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367821720] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:23,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:23,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:51:23,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745945613] [2024-11-19 09:51:23,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:23,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:51:23,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:23,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:51:23,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:51:23,329 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-19 09:51:23,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 09:51:23,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:23,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-19 09:51:23,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:26,388 INFO L124 PetriNetUnfolderBase]: 17936/23922 cut-off events. [2024-11-19 09:51:26,388 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2024-11-19 09:51:26,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46767 conditions, 23922 events. 17936/23922 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154876 event pairs, 11530 based on Foata normal form. 1/11174 useless extension candidates. Maximal degree in co-relation 44660. Up to 21814 conditions per place. [2024-11-19 09:51:26,605 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 43 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2024-11-19 09:51:26,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 244 flow [2024-11-19 09:51:26,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:51:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:51:26,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2024-11-19 09:51:26,617 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-11-19 09:51:26,618 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 168 flow. Second operand 3 states and 126 transitions. [2024-11-19 09:51:26,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 244 flow [2024-11-19 09:51:26,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 65 transitions, 228 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-19 09:51:26,732 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 142 flow [2024-11-19 09:51:26,734 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2024-11-19 09:51:26,736 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -13 predicate places. [2024-11-19 09:51:26,736 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 142 flow [2024-11-19 09:51:26,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 09:51:26,737 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:26,737 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:51:26,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:51:26,737 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:26,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:26,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1037211, now seen corresponding path program 1 times [2024-11-19 09:51:26,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:26,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015236693] [2024-11-19 09:51:26,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:26,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:27,051 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 09:51:27,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:27,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015236693] [2024-11-19 09:51:27,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015236693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:27,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:27,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:51:27,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368966152] [2024-11-19 09:51:27,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:27,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:51:27,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:27,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:51:27,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:51:27,092 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-19 09:51:27,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:27,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:27,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-19 09:51:27,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:29,562 INFO L124 PetriNetUnfolderBase]: 17937/23925 cut-off events. [2024-11-19 09:51:29,563 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:51:29,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46151 conditions, 23925 events. 17937/23925 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154693 event pairs, 11530 based on Foata normal form. 0/11173 useless extension candidates. Maximal degree in co-relation 46114. Up to 21827 conditions per place. [2024-11-19 09:51:29,718 INFO L140 encePairwiseOnDemand]: 72/77 looper letters, 47 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2024-11-19 09:51:29,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 250 flow [2024-11-19 09:51:29,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:51:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:51:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-19 09:51:29,721 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2024-11-19 09:51:29,721 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 142 flow. Second operand 4 states and 152 transitions. [2024-11-19 09:51:29,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 250 flow [2024-11-19 09:51:29,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:29,723 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 165 flow [2024-11-19 09:51:29,724 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-11-19 09:51:29,724 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -10 predicate places. [2024-11-19 09:51:29,725 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 165 flow [2024-11-19 09:51:29,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:29,725 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:29,725 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:51:29,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:51:29,726 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:29,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:29,726 INFO L85 PathProgramCache]: Analyzing trace with hash 32156855, now seen corresponding path program 1 times [2024-11-19 09:51:29,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:29,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355176836] [2024-11-19 09:51:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:29,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:29,945 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 09:51:29,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:29,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355176836] [2024-11-19 09:51:29,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355176836] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:29,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:29,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:51:29,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702716954] [2024-11-19 09:51:29,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:29,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:51:29,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:29,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:51:29,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:51:29,971 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-19 09:51:29,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 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 09:51:29,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:29,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-19 09:51:29,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:31,888 INFO L124 PetriNetUnfolderBase]: 17938/23928 cut-off events. [2024-11-19 09:51:31,888 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:51:31,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46168 conditions, 23928 events. 17938/23928 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154804 event pairs, 11530 based on Foata normal form. 0/11175 useless extension candidates. Maximal degree in co-relation 46143. Up to 21826 conditions per place. [2024-11-19 09:51:32,065 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 47 selfloop transitions, 7 changer transitions 0/71 dead transitions. [2024-11-19 09:51:32,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 279 flow [2024-11-19 09:51:32,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:51:32,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:51:32,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-11-19 09:51:32,072 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-11-19 09:51:32,073 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 165 flow. Second operand 5 states and 180 transitions. [2024-11-19 09:51:32,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 279 flow [2024-11-19 09:51:32,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:51:32,076 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 199 flow [2024-11-19 09:51:32,077 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-11-19 09:51:32,078 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -5 predicate places. [2024-11-19 09:51:32,078 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 199 flow [2024-11-19 09:51:32,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 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 09:51:32,079 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:32,079 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 09:51:32,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:51:32,079 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:32,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:32,080 INFO L85 PathProgramCache]: Analyzing trace with hash 996865588, now seen corresponding path program 1 times [2024-11-19 09:51:32,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:32,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938309946] [2024-11-19 09:51:32,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:32,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:32,315 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 09:51:32,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:32,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938309946] [2024-11-19 09:51:32,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938309946] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:32,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:32,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:51:32,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151258579] [2024-11-19 09:51:32,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:32,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:51:32,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:32,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:51:32,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:51:32,378 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-19 09:51:32,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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 09:51:32,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:32,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-19 09:51:32,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:34,314 INFO L124 PetriNetUnfolderBase]: 17939/23931 cut-off events. [2024-11-19 09:51:34,315 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:51:34,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46190 conditions, 23931 events. 17939/23931 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 155066 event pairs, 11530 based on Foata normal form. 0/11179 useless extension candidates. Maximal degree in co-relation 46159. Up to 21829 conditions per place. [2024-11-19 09:51:34,469 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 48 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2024-11-19 09:51:34,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 74 transitions, 319 flow [2024-11-19 09:51:34,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:51:34,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:51:34,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-11-19 09:51:34,472 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-11-19 09:51:34,472 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 199 flow. Second operand 5 states and 180 transitions. [2024-11-19 09:51:34,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 74 transitions, 319 flow [2024-11-19 09:51:34,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:51:34,474 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 241 flow [2024-11-19 09:51:34,475 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2024-11-19 09:51:34,475 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2024-11-19 09:51:34,476 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 241 flow [2024-11-19 09:51:34,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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 09:51:34,476 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:34,476 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:51:34,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:51:34,477 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:34,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:34,477 INFO L85 PathProgramCache]: Analyzing trace with hash 996793698, now seen corresponding path program 1 times [2024-11-19 09:51:34,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:34,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247578511] [2024-11-19 09:51:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:34,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:34,662 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 09:51:34,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:34,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247578511] [2024-11-19 09:51:34,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247578511] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:34,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686801666] [2024-11-19 09:51:34,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:34,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:34,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:34,667 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 09:51:34,668 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 09:51:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:34,752 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:51:34,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:34,823 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 09:51:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:34,956 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:35,079 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 09:51:35,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686801666] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:35,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:35,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:51:35,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974426979] [2024-11-19 09:51:35,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:35,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:51:35,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:35,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:51:35,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:51:35,181 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-19 09:51:35,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 241 flow. Second operand has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 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 09:51:35,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:35,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-19 09:51:35,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:37,280 INFO L124 PetriNetUnfolderBase]: 17939/23930 cut-off events. [2024-11-19 09:51:37,281 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-19 09:51:37,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46208 conditions, 23930 events. 17939/23930 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 155028 event pairs, 11530 based on Foata normal form. 0/11181 useless extension candidates. Maximal degree in co-relation 46174. Up to 21829 conditions per place. [2024-11-19 09:51:37,422 INFO L140 encePairwiseOnDemand]: 72/77 looper letters, 49 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2024-11-19 09:51:37,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 73 transitions, 349 flow [2024-11-19 09:51:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:51:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:51:37,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2024-11-19 09:51:37,425 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-11-19 09:51:37,425 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 241 flow. Second operand 6 states and 201 transitions. [2024-11-19 09:51:37,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 73 transitions, 349 flow [2024-11-19 09:51:37,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 73 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:37,432 INFO L231 Difference]: Finished difference. Result has 80 places, 73 transitions, 244 flow [2024-11-19 09:51:37,433 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=80, PETRI_TRANSITIONS=73} [2024-11-19 09:51:37,433 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2024-11-19 09:51:37,434 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 73 transitions, 244 flow [2024-11-19 09:51:37,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 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 09:51:37,435 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:37,435 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-19 09:51:37,454 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 09:51:37,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:37,637 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:37,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:37,637 INFO L85 PathProgramCache]: Analyzing trace with hash 838001052, now seen corresponding path program 1 times [2024-11-19 09:51:37,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:37,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923607938] [2024-11-19 09:51:37,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:37,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:37,859 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 09:51:37,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:37,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923607938] [2024-11-19 09:51:37,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923607938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:37,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155782055] [2024-11-19 09:51:37,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:37,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:37,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:37,862 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 09:51:37,863 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 09:51:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:37,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:51:37,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:37,966 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 09:51:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:38,153 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:38,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155782055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:38,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:38,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-19 09:51:38,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019319831] [2024-11-19 09:51:38,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:38,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:51:38,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:38,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:51:38,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:51:38,441 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-19 09:51:38,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 73 transitions, 244 flow. Second operand has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 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 09:51:38,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:38,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-19 09:51:38,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:40,618 INFO L124 PetriNetUnfolderBase]: 17939/23929 cut-off events. [2024-11-19 09:51:40,618 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:51:40,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46208 conditions, 23929 events. 17939/23929 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154949 event pairs, 11530 based on Foata normal form. 0/11181 useless extension candidates. Maximal degree in co-relation 46170. Up to 21821 conditions per place. [2024-11-19 09:51:40,777 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 43 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-11-19 09:51:40,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 72 transitions, 350 flow [2024-11-19 09:51:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:51:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:51:40,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-11-19 09:51:40,779 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4230055658627087 [2024-11-19 09:51:40,779 INFO L175 Difference]: Start difference. First operand has 80 places, 73 transitions, 244 flow. Second operand 7 states and 228 transitions. [2024-11-19 09:51:40,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 72 transitions, 350 flow [2024-11-19 09:51:40,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 316 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-19 09:51:40,782 INFO L231 Difference]: Finished difference. Result has 77 places, 72 transitions, 230 flow [2024-11-19 09:51:40,783 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=230, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2024-11-19 09:51:40,784 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2024-11-19 09:51:40,784 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 230 flow [2024-11-19 09:51:40,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 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 09:51:40,784 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:40,785 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-19 09:51:40,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:51:40,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-19 09:51:40,986 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:40,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:40,986 INFO L85 PathProgramCache]: Analyzing trace with hash 210156802, now seen corresponding path program 1 times [2024-11-19 09:51:40,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:40,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105096668] [2024-11-19 09:51:40,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:40,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:41,245 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 09:51:41,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:41,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105096668] [2024-11-19 09:51:41,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105096668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:41,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579322391] [2024-11-19 09:51:41,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:41,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:41,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:41,248 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 09:51:41,250 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 09:51:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:41,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 09:51:41,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:41,362 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 09:51:41,522 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 09:51:41,522 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:41,655 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 09:51:41,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579322391] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:41,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:41,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-19 09:51:41,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104958183] [2024-11-19 09:51:41,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:41,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:51:41,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:41,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:51:41,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:51:41,864 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-19 09:51:41,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 72 transitions, 230 flow. Second operand has 13 states, 13 states have (on average 26.46153846153846) internal successors, (344), 13 states have internal predecessors, (344), 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 09:51:41,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:41,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-19 09:51:41,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:43,815 INFO L124 PetriNetUnfolderBase]: 17941/23934 cut-off events. [2024-11-19 09:51:43,815 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:51:43,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46216 conditions, 23934 events. 17941/23934 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154944 event pairs, 11530 based on Foata normal form. 0/11186 useless extension candidates. Maximal degree in co-relation 46155. Up to 21822 conditions per place. [2024-11-19 09:51:43,916 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 39 selfloop transitions, 21 changer transitions 0/77 dead transitions. [2024-11-19 09:51:43,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 372 flow [2024-11-19 09:51:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:51:43,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:51:43,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 284 transitions. [2024-11-19 09:51:43,918 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4098124098124098 [2024-11-19 09:51:43,918 INFO L175 Difference]: Start difference. First operand has 77 places, 72 transitions, 230 flow. Second operand 9 states and 284 transitions. [2024-11-19 09:51:43,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 372 flow [2024-11-19 09:51:43,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 77 transitions, 345 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-19 09:51:43,920 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 267 flow [2024-11-19 09:51:43,921 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=267, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2024-11-19 09:51:43,921 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2024-11-19 09:51:43,921 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 267 flow [2024-11-19 09:51:43,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.46153846153846) internal successors, (344), 13 states have internal predecessors, (344), 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 09:51:43,922 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:43,922 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:43,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 09:51:44,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:44,125 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:44,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:44,125 INFO L85 PathProgramCache]: Analyzing trace with hash 182116694, now seen corresponding path program 1 times [2024-11-19 09:51:44,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:44,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306413245] [2024-11-19 09:51:44,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:44,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:44,198 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 09:51:44,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:44,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306413245] [2024-11-19 09:51:44,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306413245] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:44,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:44,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:51:44,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198066782] [2024-11-19 09:51:44,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:44,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:51:44,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:44,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:51:44,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:51:44,209 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2024-11-19 09:51:44,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 77 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:44,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:44,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2024-11-19 09:51:44,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:46,173 INFO L124 PetriNetUnfolderBase]: 19389/26036 cut-off events. [2024-11-19 09:51:46,174 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:51:46,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50350 conditions, 26036 events. 19389/26036 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2045. Compared 171147 event pairs, 12584 based on Foata normal form. 396/13261 useless extension candidates. Maximal degree in co-relation 46094. Up to 21835 conditions per place. [2024-11-19 09:51:46,493 INFO L140 encePairwiseOnDemand]: 62/77 looper letters, 94 selfloop transitions, 7 changer transitions 0/118 dead transitions. [2024-11-19 09:51:46,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 118 transitions, 617 flow [2024-11-19 09:51:46,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:51:46,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:51:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2024-11-19 09:51:46,496 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6077922077922078 [2024-11-19 09:51:46,496 INFO L175 Difference]: Start difference. First operand has 79 places, 77 transitions, 267 flow. Second operand 5 states and 234 transitions. [2024-11-19 09:51:46,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 118 transitions, 617 flow [2024-11-19 09:51:46,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 118 transitions, 545 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-19 09:51:46,503 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 287 flow [2024-11-19 09:51:46,504 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=287, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-11-19 09:51:46,504 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2024-11-19 09:51:46,504 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 287 flow [2024-11-19 09:51:46,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:46,505 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:46,505 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:46,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:51:46,505 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:46,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:46,505 INFO L85 PathProgramCache]: Analyzing trace with hash 297941469, now seen corresponding path program 1 times [2024-11-19 09:51:46,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:46,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249314988] [2024-11-19 09:51:46,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:46,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:46,656 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 09:51:46,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:46,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249314988] [2024-11-19 09:51:46,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249314988] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:46,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:46,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:51:46,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340934824] [2024-11-19 09:51:46,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:46,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:51:46,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:46,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:51:46,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:51:46,711 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-19 09:51:46,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 287 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 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 09:51:46,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:46,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-19 09:51:46,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:50,639 INFO L124 PetriNetUnfolderBase]: 44955/59344 cut-off events. [2024-11-19 09:51:50,639 INFO L125 PetriNetUnfolderBase]: For 2430/3501 co-relation queries the response was YES. [2024-11-19 09:51:50,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129498 conditions, 59344 events. 44955/59344 cut-off events. For 2430/3501 co-relation queries the response was YES. Maximal size of possible extension queue 4076. Compared 406479 event pairs, 15346 based on Foata normal form. 0/31024 useless extension candidates. Maximal degree in co-relation 114901. Up to 18947 conditions per place. [2024-11-19 09:51:50,953 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 185 selfloop transitions, 12 changer transitions 0/211 dead transitions. [2024-11-19 09:51:50,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 211 transitions, 1005 flow [2024-11-19 09:51:50,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:51:50,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:51:50,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 382 transitions. [2024-11-19 09:51:50,955 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6201298701298701 [2024-11-19 09:51:50,955 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 287 flow. Second operand 8 states and 382 transitions. [2024-11-19 09:51:50,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 211 transitions, 1005 flow [2024-11-19 09:51:51,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 211 transitions, 1000 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:51,147 INFO L231 Difference]: Finished difference. Result has 87 places, 85 transitions, 336 flow [2024-11-19 09:51:51,148 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=87, PETRI_TRANSITIONS=85} [2024-11-19 09:51:51,150 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 9 predicate places. [2024-11-19 09:51:51,150 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 85 transitions, 336 flow [2024-11-19 09:51:51,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 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 09:51:51,150 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:51,151 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:51,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 09:51:51,151 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:51,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:51,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2138009062, now seen corresponding path program 1 times [2024-11-19 09:51:51,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:51,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891125587] [2024-11-19 09:51:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:51,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:51,244 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 09:51:51,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:51,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891125587] [2024-11-19 09:51:51,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891125587] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:51,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:51,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:51:51,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924636008] [2024-11-19 09:51:51,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:51,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:51:51,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:51,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:51:51,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:51:51,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2024-11-19 09:51:51,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 85 transitions, 336 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:51,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:51,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2024-11-19 09:51:51,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:55,332 INFO L124 PetriNetUnfolderBase]: 34382/48658 cut-off events. [2024-11-19 09:51:55,332 INFO L125 PetriNetUnfolderBase]: For 7964/7964 co-relation queries the response was YES. [2024-11-19 09:51:55,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110438 conditions, 48658 events. 34382/48658 cut-off events. For 7964/7964 co-relation queries the response was YES. Maximal size of possible extension queue 3508. Compared 378901 event pairs, 26681 based on Foata normal form. 772/28233 useless extension candidates. Maximal degree in co-relation 91192. Up to 40663 conditions per place. [2024-11-19 09:51:55,583 INFO L140 encePairwiseOnDemand]: 64/77 looper letters, 97 selfloop transitions, 10 changer transitions 0/125 dead transitions. [2024-11-19 09:51:55,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 125 transitions, 710 flow [2024-11-19 09:51:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:51:55,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:51:55,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 228 transitions. [2024-11-19 09:51:55,585 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5922077922077922 [2024-11-19 09:51:55,585 INFO L175 Difference]: Start difference. First operand has 87 places, 85 transitions, 336 flow. Second operand 5 states and 228 transitions. [2024-11-19 09:51:55,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 125 transitions, 710 flow [2024-11-19 09:51:55,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 125 transitions, 710 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 09:51:55,617 INFO L231 Difference]: Finished difference. Result has 93 places, 89 transitions, 427 flow [2024-11-19 09:51:55,617 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=427, PETRI_PLACES=93, PETRI_TRANSITIONS=89} [2024-11-19 09:51:55,618 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 15 predicate places. [2024-11-19 09:51:55,618 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 89 transitions, 427 flow [2024-11-19 09:51:55,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:55,618 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:55,618 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:55,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:51:55,619 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:55,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:55,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1609686370, now seen corresponding path program 1 times [2024-11-19 09:51:55,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:55,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855499191] [2024-11-19 09:51:55,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:55,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:55,727 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 09:51:55,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:55,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855499191] [2024-11-19 09:51:55,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855499191] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:55,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:55,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:51:55,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882273425] [2024-11-19 09:51:55,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:55,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:51:55,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:55,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:51:55,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:51:55,758 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-19 09:51:55,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 89 transitions, 427 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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 09:51:55,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:55,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-19 09:51:55,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:59,256 INFO L124 PetriNetUnfolderBase]: 29998/43353 cut-off events. [2024-11-19 09:51:59,256 INFO L125 PetriNetUnfolderBase]: For 10597/10597 co-relation queries the response was YES. [2024-11-19 09:51:59,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110736 conditions, 43353 events. 29998/43353 cut-off events. For 10597/10597 co-relation queries the response was YES. Maximal size of possible extension queue 3095. Compared 345368 event pairs, 23531 based on Foata normal form. 0/25699 useless extension candidates. Maximal degree in co-relation 91159. Up to 38910 conditions per place. [2024-11-19 09:51:59,537 INFO L140 encePairwiseOnDemand]: 73/77 looper letters, 60 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2024-11-19 09:51:59,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 88 transitions, 563 flow [2024-11-19 09:51:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:51:59,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:51:59,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-11-19 09:51:59,538 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-11-19 09:51:59,538 INFO L175 Difference]: Start difference. First operand has 93 places, 89 transitions, 427 flow. Second operand 5 states and 170 transitions. [2024-11-19 09:51:59,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 88 transitions, 563 flow [2024-11-19 09:51:59,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 88 transitions, 558 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:51:59,557 INFO L231 Difference]: Finished difference. Result has 95 places, 88 transitions, 438 flow [2024-11-19 09:51:59,557 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=95, PETRI_TRANSITIONS=88} [2024-11-19 09:51:59,558 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 17 predicate places. [2024-11-19 09:51:59,558 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 88 transitions, 438 flow [2024-11-19 09:51:59,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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 09:51:59,558 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:59,558 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:59,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 09:51:59,558 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:51:59,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:59,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1609686371, now seen corresponding path program 1 times [2024-11-19 09:51:59,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:59,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506117484] [2024-11-19 09:51:59,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:59,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:59,779 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 09:51:59,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:59,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506117484] [2024-11-19 09:51:59,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506117484] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:59,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618391192] [2024-11-19 09:51:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:59,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:59,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:59,782 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 09:51:59,782 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 09:51:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:59,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-19 09:51:59,884 INFO L278 TraceCheckSpWp]: Computing forward predicates...