./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-name-comparator-subst.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/chl-name-comparator-subst.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 3855d6da0b439f4c6a497e897f140f408df8c7fd65e3042f0fafae1979048a3d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:45:16,927 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:45:16,994 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:45:16,998 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:45:16,999 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:45:17,030 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:45:17,031 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:45:17,032 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:45:17,032 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:45:17,033 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:45:17,034 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:45:17,034 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:45:17,034 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:45:17,035 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:45:17,035 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:45:17,035 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:45:17,036 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:45:17,036 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:45:17,036 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:45:17,037 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:45:17,037 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:45:17,041 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:45:17,041 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:45:17,041 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:45:17,042 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:45:17,042 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:45:17,042 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:45:17,042 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:45:17,043 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:45:17,043 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:45:17,044 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:45:17,044 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:45:17,045 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:45:17,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:45:17,045 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:45:17,046 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:45:17,046 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:45:17,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:45:17,046 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:45:17,047 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:45:17,047 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:45:17,047 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:45:17,047 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3855d6da0b439f4c6a497e897f140f408df8c7fd65e3042f0fafae1979048a3d [2024-11-19 09:45:17,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:45:17,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:45:17,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:45:17,338 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:45:17,338 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:45:17,353 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2024-11-19 09:45:18,776 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:45:18,969 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:45:18,972 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2024-11-19 09:45:18,983 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d723029f/7a5fe7091eeb43bcb4af3830d24c9662/FLAG91dd89d98 [2024-11-19 09:45:19,353 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d723029f/7a5fe7091eeb43bcb4af3830d24c9662 [2024-11-19 09:45:19,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:45:19,357 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:45:19,359 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:45:19,359 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:45:19,364 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:45:19,365 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:45:19" (1/1) ... [2024-11-19 09:45:19,365 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cc4892f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:19, skipping insertion in model container [2024-11-19 09:45:19,365 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:45:19" (1/1) ... [2024-11-19 09:45:19,388 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:45:19,622 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 09:45:19,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:45:19,641 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:45:19,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:45:19,711 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:45:19,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:19 WrapperNode [2024-11-19 09:45:19,711 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:45:19,712 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:45:19,713 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:45:19,713 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:45:19,720 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:19" (1/1) ... [2024-11-19 09:45:19,732 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:19" (1/1) ... [2024-11-19 09:45:19,766 INFO L138 Inliner]: procedures = 25, calls = 30, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 306 [2024-11-19 09:45:19,767 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:45:19,768 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:45:19,768 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:45:19,768 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:45:19,780 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:19" (1/1) ... [2024-11-19 09:45:19,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:19" (1/1) ... [2024-11-19 09:45:19,784 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:19" (1/1) ... [2024-11-19 09:45:19,805 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-19 09:45:19,805 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:19" (1/1) ... [2024-11-19 09:45:19,805 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:19" (1/1) ... [2024-11-19 09:45:19,820 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:19" (1/1) ... [2024-11-19 09:45:19,828 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:19" (1/1) ... [2024-11-19 09:45:19,833 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:19" (1/1) ... [2024-11-19 09:45:19,835 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:19" (1/1) ... [2024-11-19 09:45:19,838 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:45:19,839 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:45:19,839 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:45:19,839 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:45:19,840 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:19" (1/1) ... [2024-11-19 09:45:19,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:45:19,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:19,885 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 09:45:19,892 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 09:45:19,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:45:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:45:19,945 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:45:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:45:19,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:45:19,947 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:45:19,947 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:45:19,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:45:19,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:45:19,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:45:19,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:45:19,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:45:19,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:45:19,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:45:19,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:45:19,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:45:19,951 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 09:45:20,091 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:45:20,093 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:45:20,609 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:45:20,610 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:45:21,155 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:45:21,156 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 09:45:21,156 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:45:21 BoogieIcfgContainer [2024-11-19 09:45:21,156 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:45:21,159 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:45:21,160 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:45:21,163 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:45:21,163 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:45:19" (1/3) ... [2024-11-19 09:45:21,164 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9f4a25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:45:21, skipping insertion in model container [2024-11-19 09:45:21,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:19" (2/3) ... [2024-11-19 09:45:21,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9f4a25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:45:21, skipping insertion in model container [2024-11-19 09:45:21,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:45:21" (3/3) ... [2024-11-19 09:45:21,166 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-subst.wvr.c [2024-11-19 09:45:21,186 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:45:21,186 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-19 09:45:21,187 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:45:21,344 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 09:45:21,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 50 transitions, 121 flow [2024-11-19 09:45:21,446 INFO L124 PetriNetUnfolderBase]: 7/47 cut-off events. [2024-11-19 09:45:21,446 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:45:21,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 7/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 82 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-19 09:45:21,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 50 transitions, 121 flow [2024-11-19 09:45:21,455 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 46 transitions, 110 flow [2024-11-19 09:45:21,467 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:45:21,475 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;@4ed7c2d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:45:21,475 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-19 09:45:21,479 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:45:21,479 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:45:21,479 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:45:21,479 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:21,480 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:45:21,480 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:21,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:21,485 INFO L85 PathProgramCache]: Analyzing trace with hash 925738, now seen corresponding path program 1 times [2024-11-19 09:45:21,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:21,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987135742] [2024-11-19 09:45:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:21,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:21,810 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 09:45:21,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:21,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987135742] [2024-11-19 09:45:21,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987135742] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:21,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:21,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:45:21,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984418153] [2024-11-19 09:45:21,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:21,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:45:21,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:21,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:45:21,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:45:21,871 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-19 09:45:21,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:21,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:21,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-19 09:45:21,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:22,307 INFO L124 PetriNetUnfolderBase]: 1316/2109 cut-off events. [2024-11-19 09:45:22,308 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2024-11-19 09:45:22,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4122 conditions, 2109 events. 1316/2109 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10175 event pairs, 1060 based on Foata normal form. 1/1740 useless extension candidates. Maximal degree in co-relation 3816. Up to 1877 conditions per place. [2024-11-19 09:45:22,330 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 30 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-11-19 09:45:22,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 162 flow [2024-11-19 09:45:22,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:45:22,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:45:22,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-11-19 09:45:22,343 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2024-11-19 09:45:22,345 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 110 flow. Second operand 3 states and 73 transitions. [2024-11-19 09:45:22,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 162 flow [2024-11-19 09:45:22,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 150 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:45:22,356 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 90 flow [2024-11-19 09:45:22,359 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-19 09:45:22,363 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2024-11-19 09:45:22,363 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 90 flow [2024-11-19 09:45:22,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:22,364 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:22,364 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:45:22,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:45:22,365 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:22,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:22,365 INFO L85 PathProgramCache]: Analyzing trace with hash 925739, now seen corresponding path program 1 times [2024-11-19 09:45:22,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:22,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859606449] [2024-11-19 09:45:22,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:22,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:22,588 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 09:45:22,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:22,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859606449] [2024-11-19 09:45:22,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859606449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:22,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:22,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:45:22,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484719218] [2024-11-19 09:45:22,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:22,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:45:22,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:22,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:45:22,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:45:22,611 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-19 09:45:22,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 09:45:22,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:22,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-19 09:45:22,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:22,979 INFO L124 PetriNetUnfolderBase]: 1316/2111 cut-off events. [2024-11-19 09:45:22,979 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-19 09:45:22,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4041 conditions, 2111 events. 1316/2111 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10172 event pairs, 1060 based on Foata normal form. 1/1742 useless extension candidates. Maximal degree in co-relation 4022. Up to 1881 conditions per place. [2024-11-19 09:45:22,993 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 33 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2024-11-19 09:45:22,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 164 flow [2024-11-19 09:45:22,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:45:22,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:45:22,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-11-19 09:45:22,997 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2024-11-19 09:45:22,997 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 90 flow. Second operand 3 states and 73 transitions. [2024-11-19 09:45:22,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 164 flow [2024-11-19 09:45:22,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:45:23,000 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 100 flow [2024-11-19 09:45:23,000 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2024-11-19 09:45:23,001 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2024-11-19 09:45:23,001 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 100 flow [2024-11-19 09:45:23,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 09:45:23,002 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:23,002 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:45:23,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:45:23,002 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:23,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:23,003 INFO L85 PathProgramCache]: Analyzing trace with hash 889664305, now seen corresponding path program 1 times [2024-11-19 09:45:23,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:23,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7069630] [2024-11-19 09:45:23,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:23,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:23,238 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 09:45:23,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:23,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7069630] [2024-11-19 09:45:23,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7069630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:23,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568441606] [2024-11-19 09:45:23,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:23,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:23,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:23,244 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 09:45:23,250 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 09:45:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:23,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 09:45:23,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:23,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:45:23,439 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 09:45:23,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:23,502 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 09:45:23,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568441606] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:23,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:23,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-19 09:45:23,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596468161] [2024-11-19 09:45:23,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:23,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:45:23,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:23,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:45:23,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-19 09:45:23,563 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-19 09:45:23,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 100 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 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 09:45:23,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:23,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-19 09:45:23,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:23,954 INFO L124 PetriNetUnfolderBase]: 1318/2117 cut-off events. [2024-11-19 09:45:23,954 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-19 09:45:23,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4062 conditions, 2117 events. 1318/2117 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10194 event pairs, 1060 based on Foata normal form. 0/1747 useless extension candidates. Maximal degree in co-relation 4049. Up to 1883 conditions per place. [2024-11-19 09:45:23,965 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 35 selfloop transitions, 6 changer transitions 0/48 dead transitions. [2024-11-19 09:45:23,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 204 flow [2024-11-19 09:45:23,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:45:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:45:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-11-19 09:45:23,967 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.412 [2024-11-19 09:45:23,968 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 100 flow. Second operand 5 states and 103 transitions. [2024-11-19 09:45:23,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 204 flow [2024-11-19 09:45:23,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 48 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:45:23,969 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 140 flow [2024-11-19 09:45:23,970 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2024-11-19 09:45:23,970 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2024-11-19 09:45:23,971 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 140 flow [2024-11-19 09:45:23,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 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 09:45:23,971 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:23,971 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1] [2024-11-19 09:45:23,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:45:24,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:24,176 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:24,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:24,177 INFO L85 PathProgramCache]: Analyzing trace with hash 747879613, now seen corresponding path program 2 times [2024-11-19 09:45:24,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:24,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723026308] [2024-11-19 09:45:24,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:24,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:24,206 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:24,206 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:24,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:24,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723026308] [2024-11-19 09:45:24,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723026308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:24,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893104864] [2024-11-19 09:45:24,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:24,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:24,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:24,302 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 09:45:24,303 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 09:45:24,392 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:24,392 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:24,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 09:45:24,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:24,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:24,468 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:45:24,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893104864] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:24,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:45:24,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-19 09:45:24,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590236952] [2024-11-19 09:45:24,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:24,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:45:24,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:24,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:45:24,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:45:24,478 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-19 09:45:24,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 09:45:24,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:24,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-19 09:45:24,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:24,746 INFO L124 PetriNetUnfolderBase]: 1317/2114 cut-off events. [2024-11-19 09:45:24,746 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-11-19 09:45:24,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4066 conditions, 2114 events. 1317/2114 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10181 event pairs, 1060 based on Foata normal form. 1/1746 useless extension candidates. Maximal degree in co-relation 4039. Up to 1879 conditions per place. [2024-11-19 09:45:24,757 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 31 selfloop transitions, 7 changer transitions 0/45 dead transitions. [2024-11-19 09:45:24,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 206 flow [2024-11-19 09:45:24,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:45:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:45:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-11-19 09:45:24,759 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-11-19 09:45:24,759 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 140 flow. Second operand 6 states and 117 transitions. [2024-11-19 09:45:24,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 206 flow [2024-11-19 09:45:24,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 45 transitions, 186 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-11-19 09:45:24,761 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 124 flow [2024-11-19 09:45:24,761 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=124, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-11-19 09:45:24,762 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-11-19 09:45:24,762 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 124 flow [2024-11-19 09:45:24,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 09:45:24,762 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:24,763 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:24,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 09:45:24,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-19 09:45:24,964 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:24,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:24,965 INFO L85 PathProgramCache]: Analyzing trace with hash 826344425, now seen corresponding path program 1 times [2024-11-19 09:45:24,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:24,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431928642] [2024-11-19 09:45:24,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:24,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:25,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:25,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:25,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431928642] [2024-11-19 09:45:25,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431928642] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:25,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:25,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:45:25,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103739717] [2024-11-19 09:45:25,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:25,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:45:25,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:25,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:45:25,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:45:25,041 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:45:25,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 09:45:25,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:25,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:45:25,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:25,282 INFO L124 PetriNetUnfolderBase]: 1317/2000 cut-off events. [2024-11-19 09:45:25,283 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-19 09:45:25,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3951 conditions, 2000 events. 1317/2000 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8571 event pairs, 1060 based on Foata normal form. 0/1745 useless extension candidates. Maximal degree in co-relation 3916. Up to 1878 conditions per place. [2024-11-19 09:45:25,295 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-19 09:45:25,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 40 transitions, 190 flow [2024-11-19 09:45:25,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:45:25,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:45:25,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2024-11-19 09:45:25,297 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.355 [2024-11-19 09:45:25,297 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 124 flow. Second operand 4 states and 71 transitions. [2024-11-19 09:45:25,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 40 transitions, 190 flow [2024-11-19 09:45:25,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 172 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-19 09:45:25,299 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 108 flow [2024-11-19 09:45:25,299 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2024-11-19 09:45:25,299 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2024-11-19 09:45:25,300 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 108 flow [2024-11-19 09:45:25,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 09:45:25,300 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:25,300 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:25,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:45:25,301 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:25,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:25,301 INFO L85 PathProgramCache]: Analyzing trace with hash 826344426, now seen corresponding path program 1 times [2024-11-19 09:45:25,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:25,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300563750] [2024-11-19 09:45:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:25,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:25,358 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 09:45:25,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:25,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300563750] [2024-11-19 09:45:25,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300563750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:25,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298145140] [2024-11-19 09:45:25,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:25,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:25,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:25,361 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 09:45:25,362 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 09:45:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:25,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 09:45:25,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:25,470 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 09:45:25,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:25,490 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 09:45:25,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298145140] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:25,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:25,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-19 09:45:25,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586434900] [2024-11-19 09:45:25,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:25,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:45:25,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:25,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:45:25,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:45:25,500 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-19 09:45:25,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 108 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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 09:45:25,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:25,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-19 09:45:25,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:25,811 INFO L124 PetriNetUnfolderBase]: 1315/1998 cut-off events. [2024-11-19 09:45:25,812 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-19 09:45:25,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3938 conditions, 1998 events. 1315/1998 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8567 event pairs, 1060 based on Foata normal form. 2/1745 useless extension candidates. Maximal degree in co-relation 3908. Up to 1878 conditions per place. [2024-11-19 09:45:25,822 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-19 09:45:25,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 178 flow [2024-11-19 09:45:25,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:45:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:45:25,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-11-19 09:45:25,823 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.412 [2024-11-19 09:45:25,824 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 108 flow. Second operand 5 states and 103 transitions. [2024-11-19 09:45:25,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 178 flow [2024-11-19 09:45:25,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 175 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:45:25,825 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 103 flow [2024-11-19 09:45:25,825 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2024-11-19 09:45:25,826 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2024-11-19 09:45:25,826 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 103 flow [2024-11-19 09:45:25,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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 09:45:25,827 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:25,827 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:25,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:45:26,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:26,028 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:26,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:26,028 INFO L85 PathProgramCache]: Analyzing trace with hash 353757046, now seen corresponding path program 2 times [2024-11-19 09:45:26,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:26,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448091100] [2024-11-19 09:45:26,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:26,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:26,047 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:45:26,047 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:26,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:26,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448091100] [2024-11-19 09:45:26,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448091100] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:26,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:26,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:45:26,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737952493] [2024-11-19 09:45:26,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:26,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:45:26,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:26,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:45:26,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:45:26,207 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-19 09:45:26,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:26,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:26,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-19 09:45:26,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:26,642 INFO L124 PetriNetUnfolderBase]: 2629/3831 cut-off events. [2024-11-19 09:45:26,642 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-19 09:45:26,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7690 conditions, 3831 events. 2629/3831 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17826 event pairs, 1240 based on Foata normal form. 0/3235 useless extension candidates. Maximal degree in co-relation 7661. Up to 2168 conditions per place. [2024-11-19 09:45:26,666 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 57 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2024-11-19 09:45:26,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 282 flow [2024-11-19 09:45:26,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:45:26,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:45:26,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-11-19 09:45:26,668 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-11-19 09:45:26,668 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 103 flow. Second operand 5 states and 120 transitions. [2024-11-19 09:45:26,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 282 flow [2024-11-19 09:45:26,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 64 transitions, 274 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:45:26,670 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 111 flow [2024-11-19 09:45:26,670 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=111, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-11-19 09:45:26,671 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2024-11-19 09:45:26,671 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 111 flow [2024-11-19 09:45:26,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:26,672 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:26,672 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:26,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 09:45:26,672 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:26,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:26,673 INFO L85 PathProgramCache]: Analyzing trace with hash 170638280, now seen corresponding path program 1 times [2024-11-19 09:45:26,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:26,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083103806] [2024-11-19 09:45:26,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:26,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:45:26,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:26,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083103806] [2024-11-19 09:45:26,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083103806] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:26,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534007485] [2024-11-19 09:45:26,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:26,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:26,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:26,885 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 09:45:26,887 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 09:45:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:26,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:45:26,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:27,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:27,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-19 09:45:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:27,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534007485] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:27,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:27,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2024-11-19 09:45:27,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306893772] [2024-11-19 09:45:27,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:27,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:45:27,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:27,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:45:27,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:45:27,478 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-19 09:45:27,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 111 flow. Second operand has 17 states, 17 states have (on average 14.470588235294118) internal successors, (246), 17 states have internal predecessors, (246), 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 09:45:27,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:27,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-19 09:45:27,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:28,748 INFO L124 PetriNetUnfolderBase]: 6825/9781 cut-off events. [2024-11-19 09:45:28,748 INFO L125 PetriNetUnfolderBase]: For 1389/1619 co-relation queries the response was YES. [2024-11-19 09:45:28,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20687 conditions, 9781 events. 6825/9781 cut-off events. For 1389/1619 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 49247 event pairs, 2385 based on Foata normal form. 0/8223 useless extension candidates. Maximal degree in co-relation 20655. Up to 4022 conditions per place. [2024-11-19 09:45:28,804 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 81 selfloop transitions, 7 changer transitions 0/91 dead transitions. [2024-11-19 09:45:28,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 91 transitions, 419 flow [2024-11-19 09:45:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:45:28,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:45:28,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-11-19 09:45:28,806 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-11-19 09:45:28,806 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 111 flow. Second operand 8 states and 183 transitions. [2024-11-19 09:45:28,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 91 transitions, 419 flow [2024-11-19 09:45:28,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 91 transitions, 409 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:45:28,809 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 133 flow [2024-11-19 09:45:28,810 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=133, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2024-11-19 09:45:28,810 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-11-19 09:45:28,811 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 133 flow [2024-11-19 09:45:28,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.470588235294118) internal successors, (246), 17 states have internal predecessors, (246), 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 09:45:28,812 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:28,812 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:28,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 09:45:29,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:29,013 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:29,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:29,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1072652486, now seen corresponding path program 1 times [2024-11-19 09:45:29,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:29,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246971172] [2024-11-19 09:45:29,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:29,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:29,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:29,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246971172] [2024-11-19 09:45:29,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246971172] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:29,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754237317] [2024-11-19 09:45:29,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:29,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:29,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:29,356 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:45:29,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:45:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:29,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 09:45:29,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:29,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:29,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-19 09:45:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:29,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754237317] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:29,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:29,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-19 09:45:29,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304792700] [2024-11-19 09:45:29,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:29,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 09:45:29,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:29,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 09:45:29,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2024-11-19 09:45:30,038 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-19 09:45:30,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 133 flow. Second operand has 23 states, 23 states have (on average 14.08695652173913) internal successors, (324), 23 states have internal predecessors, (324), 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 09:45:30,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:30,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-19 09:45:30,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:32,152 INFO L124 PetriNetUnfolderBase]: 12853/18397 cut-off events. [2024-11-19 09:45:32,153 INFO L125 PetriNetUnfolderBase]: For 2839/2839 co-relation queries the response was YES. [2024-11-19 09:45:32,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40509 conditions, 18397 events. 12853/18397 cut-off events. For 2839/2839 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 102197 event pairs, 3460 based on Foata normal form. 0/15491 useless extension candidates. Maximal degree in co-relation 40473. Up to 5736 conditions per place. [2024-11-19 09:45:32,238 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 115 selfloop transitions, 8 changer transitions 0/126 dead transitions. [2024-11-19 09:45:32,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 126 transitions, 608 flow [2024-11-19 09:45:32,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:45:32,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:45:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-11-19 09:45:32,240 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-19 09:45:32,240 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 133 flow. Second operand 9 states and 225 transitions. [2024-11-19 09:45:32,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 126 transitions, 608 flow [2024-11-19 09:45:32,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 126 transitions, 601 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:45:32,247 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 160 flow [2024-11-19 09:45:32,248 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=160, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2024-11-19 09:45:32,248 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 10 predicate places. [2024-11-19 09:45:32,249 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 160 flow [2024-11-19 09:45:32,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 14.08695652173913) internal successors, (324), 23 states have internal predecessors, (324), 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 09:45:32,249 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:32,250 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:32,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-19 09:45:32,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:32,455 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:32,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:32,455 INFO L85 PathProgramCache]: Analyzing trace with hash -383312668, now seen corresponding path program 1 times [2024-11-19 09:45:32,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:32,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51604737] [2024-11-19 09:45:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:32,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:32,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:32,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51604737] [2024-11-19 09:45:32,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51604737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:32,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745123055] [2024-11-19 09:45:32,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:32,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:32,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:32,651 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:45:32,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:45:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:32,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:45:32,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:32,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:32,874 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:32,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-19 09:45:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:33,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745123055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:33,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:33,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-19 09:45:33,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386173173] [2024-11-19 09:45:33,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:33,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 09:45:33,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:33,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 09:45:33,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-11-19 09:45:33,146 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-19 09:45:33,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 160 flow. Second operand has 19 states, 19 states have (on average 14.631578947368421) internal successors, (278), 19 states have internal predecessors, (278), 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 09:45:33,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:33,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-19 09:45:33,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:37,366 INFO L124 PetriNetUnfolderBase]: 32327/46067 cut-off events. [2024-11-19 09:45:37,366 INFO L125 PetriNetUnfolderBase]: For 20063/20479 co-relation queries the response was YES. [2024-11-19 09:45:37,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104651 conditions, 46067 events. 32327/46067 cut-off events. For 20063/20479 co-relation queries the response was YES. Maximal size of possible extension queue 927. Compared 277626 event pairs, 12757 based on Foata normal form. 0/38291 useless extension candidates. Maximal degree in co-relation 104612. Up to 20102 conditions per place. [2024-11-19 09:45:37,653 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 89 selfloop transitions, 7 changer transitions 0/99 dead transitions. [2024-11-19 09:45:37,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 99 transitions, 546 flow [2024-11-19 09:45:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:45:37,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:45:37,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-11-19 09:45:37,655 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4475 [2024-11-19 09:45:37,655 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 160 flow. Second operand 8 states and 179 transitions. [2024-11-19 09:45:37,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 99 transitions, 546 flow [2024-11-19 09:45:37,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 521 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-19 09:45:37,667 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 175 flow [2024-11-19 09:45:37,667 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=175, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2024-11-19 09:45:37,667 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 14 predicate places. [2024-11-19 09:45:37,667 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 175 flow [2024-11-19 09:45:37,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 14.631578947368421) internal successors, (278), 19 states have internal predecessors, (278), 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 09:45:37,668 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:37,668 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:37,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 09:45:37,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:37,868 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:37,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:37,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1973150936, now seen corresponding path program 1 times [2024-11-19 09:45:37,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:37,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361882829] [2024-11-19 09:45:37,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:37,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:38,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:38,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361882829] [2024-11-19 09:45:38,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361882829] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:38,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776940669] [2024-11-19 09:45:38,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:38,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:38,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:38,261 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:45:38,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:45:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:38,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:45:38,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:38,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:38,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-19 09:45:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:38,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776940669] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:38,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:38,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2024-11-19 09:45:38,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585267113] [2024-11-19 09:45:38,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:38,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 09:45:38,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:38,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 09:45:38,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2024-11-19 09:45:39,271 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-19 09:45:39,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 175 flow. Second operand has 26 states, 26 states have (on average 14.423076923076923) internal successors, (375), 26 states have internal predecessors, (375), 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 09:45:39,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:39,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-19 09:45:39,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:45,366 INFO L124 PetriNetUnfolderBase]: 41923/59631 cut-off events. [2024-11-19 09:45:45,366 INFO L125 PetriNetUnfolderBase]: For 24478/25126 co-relation queries the response was YES. [2024-11-19 09:45:45,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139836 conditions, 59631 events. 41923/59631 cut-off events. For 24478/25126 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 370301 event pairs, 12007 based on Foata normal form. 778/51213 useless extension candidates. Maximal degree in co-relation 139794. Up to 18928 conditions per place. [2024-11-19 09:45:45,689 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 121 selfloop transitions, 8 changer transitions 0/132 dead transitions. [2024-11-19 09:45:45,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 132 transitions, 715 flow [2024-11-19 09:45:45,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:45:45,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:45:45,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-11-19 09:45:45,691 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48444444444444446 [2024-11-19 09:45:45,691 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 175 flow. Second operand 9 states and 218 transitions. [2024-11-19 09:45:45,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 132 transitions, 715 flow [2024-11-19 09:45:45,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 132 transitions, 708 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:45:45,811 INFO L231 Difference]: Finished difference. Result has 68 places, 46 transitions, 194 flow [2024-11-19 09:45:45,811 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=194, PETRI_PLACES=68, PETRI_TRANSITIONS=46} [2024-11-19 09:45:45,812 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 19 predicate places. [2024-11-19 09:45:45,812 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 46 transitions, 194 flow [2024-11-19 09:45:45,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.423076923076923) internal successors, (375), 26 states have internal predecessors, (375), 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 09:45:45,813 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:45,813 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2024-11-19 09:45:45,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 09:45:46,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:46,014 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:46,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:46,014 INFO L85 PathProgramCache]: Analyzing trace with hash -361073222, now seen corresponding path program 2 times [2024-11-19 09:45:46,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:46,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456872046] [2024-11-19 09:45:46,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:46,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:46,057 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:46,059 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:46,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:46,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456872046] [2024-11-19 09:45:46,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456872046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:46,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951129233] [2024-11-19 09:45:46,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:46,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:46,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:46,347 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:45:46,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:45:46,442 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:46,442 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:46,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 09:45:46,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:46,485 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:45:46,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951129233] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:46,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:45:46,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2024-11-19 09:45:46,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180766713] [2024-11-19 09:45:46,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:46,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:45:46,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:46,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:45:46,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:45:46,495 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-19 09:45:46,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 46 transitions, 194 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:46,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:46,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-19 09:45:46,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:51,182 INFO L124 PetriNetUnfolderBase]: 37549/53687 cut-off events. [2024-11-19 09:45:51,182 INFO L125 PetriNetUnfolderBase]: For 29503/30179 co-relation queries the response was YES. [2024-11-19 09:45:51,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128219 conditions, 53687 events. 37549/53687 cut-off events. For 29503/30179 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 338761 event pairs, 975 based on Foata normal form. 0/45743 useless extension candidates. Maximal degree in co-relation 128175. Up to 13570 conditions per place. [2024-11-19 09:45:51,472 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 148 selfloop transitions, 4 changer transitions 0/155 dead transitions. [2024-11-19 09:45:51,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 155 transitions, 875 flow [2024-11-19 09:45:51,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:45:51,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:45:51,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2024-11-19 09:45:51,473 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-11-19 09:45:51,473 INFO L175 Difference]: Start difference. First operand has 68 places, 46 transitions, 194 flow. Second operand 6 states and 204 transitions. [2024-11-19 09:45:51,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 155 transitions, 875 flow [2024-11-19 09:45:51,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 155 transitions, 818 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-11-19 09:45:51,613 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 166 flow [2024-11-19 09:45:51,613 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2024-11-19 09:45:51,614 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 13 predicate places. [2024-11-19 09:45:51,614 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 166 flow [2024-11-19 09:45:51,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:51,614 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:51,614 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:51,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 09:45:51,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 09:45:51,815 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:45:51,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:51,815 INFO L85 PathProgramCache]: Analyzing trace with hash 379576996, now seen corresponding path program 1 times [2024-11-19 09:45:51,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:51,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100375156] [2024-11-19 09:45:51,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:51,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:52,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:52,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100375156] [2024-11-19 09:45:52,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100375156] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:52,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007179353] [2024-11-19 09:45:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:52,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:52,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:52,297 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:45:52,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:45:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:52,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:45:52,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:52,630 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:52,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-19 09:45:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:52,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007179353] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:52,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:52,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2024-11-19 09:45:52,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992968046] [2024-11-19 09:45:52,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:52,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 09:45:52,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:52,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 09:45:52,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2024-11-19 09:45:53,272 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-19 09:45:53,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 166 flow. Second operand has 26 states, 26 states have (on average 14.653846153846153) internal successors, (381), 26 states have internal predecessors, (381), 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 09:45:53,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:53,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-19 09:45:53,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:59,976 INFO L124 PetriNetUnfolderBase]: 51001/72889 cut-off events. [2024-11-19 09:45:59,976 INFO L125 PetriNetUnfolderBase]: For 36413/37205 co-relation queries the response was YES. [2024-11-19 09:46:00,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173644 conditions, 72889 events. 51001/72889 cut-off events. For 36413/37205 co-relation queries the response was YES. Maximal size of possible extension queue 1268. Compared 460826 event pairs, 16083 based on Foata normal form. 940/66037 useless extension candidates. Maximal degree in co-relation 173607. Up to 24864 conditions per place. [2024-11-19 09:46:00,434 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 115 selfloop transitions, 8 changer transitions 0/125 dead transitions. [2024-11-19 09:46:00,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 125 transitions, 694 flow [2024-11-19 09:46:00,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:46:00,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:46:00,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-11-19 09:46:00,436 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4711111111111111 [2024-11-19 09:46:00,436 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 166 flow. Second operand 9 states and 212 transitions. [2024-11-19 09:46:00,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 125 transitions, 694 flow [2024-11-19 09:46:00,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 125 transitions, 666 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:46:00,614 INFO L231 Difference]: Finished difference. Result has 67 places, 45 transitions, 185 flow [2024-11-19 09:46:00,614 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=185, PETRI_PLACES=67, PETRI_TRANSITIONS=45} [2024-11-19 09:46:00,615 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 18 predicate places. [2024-11-19 09:46:00,615 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 45 transitions, 185 flow [2024-11-19 09:46:00,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.653846153846153) internal successors, (381), 26 states have internal predecessors, (381), 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 09:46:00,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:00,616 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:00,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 09:46:00,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-19 09:46:00,816 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 09:46:00,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:00,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1216177871, now seen corresponding path program 2 times [2024-11-19 09:46:00,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:00,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118747090] [2024-11-19 09:46:00,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:46:00,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:00,837 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:46:00,837 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:46:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:46:01,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:01,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118747090] [2024-11-19 09:46:01,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118747090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:01,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071955808] [2024-11-19 09:46:01,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:46:01,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:01,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:01,340 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:46:01,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:46:01,442 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:46:01,443 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:46:01,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 09:46:01,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:46:01,495 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:46:01,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071955808] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:46:01,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:46:01,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2024-11-19 09:46:01,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304467024] [2024-11-19 09:46:01,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:46:01,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:46:01,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:01,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:46:01,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:46:01,502 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-19 09:46:01,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 45 transitions, 185 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 09:46:01,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:01,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-19 09:46:01,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand