./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-chromosome-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 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:41:52,795 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:41:52,859 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:41:52,863 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:41:52,867 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:41:52,890 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:41:52,891 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:41:52,891 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:41:52,892 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:41:52,892 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:41:52,892 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:41:52,892 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:41:52,893 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:41:52,894 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:41:52,895 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:41:52,895 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:41:52,895 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:41:52,895 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:41:52,898 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:41:52,898 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:41:52,898 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:41:52,899 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:41:52,899 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:41:52,899 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:41:52,899 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:41:52,899 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:41:52,899 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:41:52,900 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:41:52,900 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:41:52,900 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:41:52,900 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:41:52,900 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:41:52,900 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:41:52,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:41:52,901 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:41:52,901 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:41:52,901 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:41:52,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:41:52,901 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:41:52,901 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:41:52,902 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:41:52,902 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:41:52,902 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c [2024-11-22 21:41:53,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:41:53,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:41:53,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:41:53,128 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:41:53,129 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:41:53,129 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-11-22 21:41:54,428 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:41:54,612 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:41:54,613 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-11-22 21:41:54,624 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9017d56ef/8dfb983bfc624dc7930c26e50f1c2759/FLAG04224ff81 [2024-11-22 21:41:54,992 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9017d56ef/8dfb983bfc624dc7930c26e50f1c2759 [2024-11-22 21:41:54,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:41:54,995 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:41:54,996 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:41:54,998 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:41:55,003 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:41:55,004 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:41:54" (1/1) ... [2024-11-22 21:41:55,005 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@92055c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:55, skipping insertion in model container [2024-11-22 21:41:55,005 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:41:54" (1/1) ... [2024-11-22 21:41:55,028 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:41:55,189 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:41:55,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:41:55,204 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:41:55,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:41:55,239 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:41:55,240 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:55 WrapperNode [2024-11-22 21:41:55,240 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:41:55,241 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:41:55,241 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:41:55,241 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:41:55,246 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:55" (1/1) ... [2024-11-22 21:41:55,252 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:55" (1/1) ... [2024-11-22 21:41:55,273 INFO L138 Inliner]: procedures = 25, calls = 33, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 273 [2024-11-22 21:41:55,274 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:41:55,274 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:41:55,274 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:41:55,274 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:41:55,308 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:55" (1/1) ... [2024-11-22 21:41:55,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:55" (1/1) ... [2024-11-22 21:41:55,319 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:55" (1/1) ... [2024-11-22 21:41:55,333 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-22 21:41:55,333 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:55" (1/1) ... [2024-11-22 21:41:55,333 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:55" (1/1) ... [2024-11-22 21:41:55,343 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:55" (1/1) ... [2024-11-22 21:41:55,347 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:55" (1/1) ... [2024-11-22 21:41:55,352 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:55" (1/1) ... [2024-11-22 21:41:55,354 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:55" (1/1) ... [2024-11-22 21:41:55,360 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:41:55,361 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:41:55,361 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:41:55,361 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:41:55,362 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:55" (1/1) ... [2024-11-22 21:41:55,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:41:55,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:55,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 21:41:55,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 21:41:55,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:41:55,472 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:41:55,472 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:41:55,472 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:41:55,472 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:41:55,473 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-22 21:41:55,473 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-22 21:41:55,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:41:55,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:41:55,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:41:55,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:41:55,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:41:55,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:41:55,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:41:55,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:41:55,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:41:55,476 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:41:55,588 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:41:55,590 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:41:56,017 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:41:56,017 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:41:56,390 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:41:56,390 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-22 21:41:56,391 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:41:56 BoogieIcfgContainer [2024-11-22 21:41:56,391 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:41:56,409 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:41:56,409 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:41:56,412 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:41:56,412 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:41:54" (1/3) ... [2024-11-22 21:41:56,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106cbd84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:41:56, skipping insertion in model container [2024-11-22 21:41:56,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:41:55" (2/3) ... [2024-11-22 21:41:56,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106cbd84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:41:56, skipping insertion in model container [2024-11-22 21:41:56,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:41:56" (3/3) ... [2024-11-22 21:41:56,418 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2024-11-22 21:41:56,434 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:41:56,435 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-22 21:41:56,435 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:41:56,477 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 21:41:56,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 141 flow [2024-11-22 21:41:56,539 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2024-11-22 21:41:56,539 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:41:56,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 6/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 148 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2024-11-22 21:41:56,543 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 141 flow [2024-11-22 21:41:56,546 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 130 flow [2024-11-22 21:41:56,556 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:41:56,565 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;@b366119, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:41:56,565 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-22 21:41:56,568 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:41:56,569 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:41:56,569 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:41:56,569 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:56,570 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:41:56,570 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:41:56,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:56,579 INFO L85 PathProgramCache]: Analyzing trace with hash 885590, now seen corresponding path program 1 times [2024-11-22 21:41:56,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:56,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382015074] [2024-11-22 21:41:56,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:41:56,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:41:56,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:56,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382015074] [2024-11-22 21:41:56,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382015074] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:41:56,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:41:56,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:41:56,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72091795] [2024-11-22 21:41:56,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:56,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:41:56,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:56,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:41:56,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:41:56,944 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-22 21:41:56,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:41:56,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:56,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-22 21:41:56,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:57,085 INFO L124 PetriNetUnfolderBase]: 202/443 cut-off events. [2024-11-22 21:41:57,085 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-22 21:41:57,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 443 events. 202/443 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2079 event pairs, 124 based on Foata normal form. 1/360 useless extension candidates. Maximal degree in co-relation 672. Up to 293 conditions per place. [2024-11-22 21:41:57,092 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 27 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-22 21:41:57,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 178 flow [2024-11-22 21:41:57,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:41:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:41:57,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-11-22 21:41:57,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-22 21:41:57,104 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 130 flow. Second operand 3 states and 111 transitions. [2024-11-22 21:41:57,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 178 flow [2024-11-22 21:41:57,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 166 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:41:57,111 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 112 flow [2024-11-22 21:41:57,113 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-11-22 21:41:57,116 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-11-22 21:41:57,117 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 112 flow [2024-11-22 21:41:57,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:41:57,117 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:57,118 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:41:57,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:41:57,118 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:41:57,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:57,119 INFO L85 PathProgramCache]: Analyzing trace with hash 885591, now seen corresponding path program 1 times [2024-11-22 21:41:57,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:57,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213404835] [2024-11-22 21:41:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:41:57,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:41:57,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:57,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213404835] [2024-11-22 21:41:57,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213404835] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:41:57,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:41:57,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:41:57,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375616093] [2024-11-22 21:41:57,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:41:57,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:41:57,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:57,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:41:57,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:41:57,383 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-22 21:41:57,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:41:57,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:57,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-22 21:41:57,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:57,537 INFO L124 PetriNetUnfolderBase]: 202/449 cut-off events. [2024-11-22 21:41:57,538 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-22 21:41:57,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777 conditions, 449 events. 202/449 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2080 event pairs, 124 based on Foata normal form. 1/364 useless extension candidates. Maximal degree in co-relation 734. Up to 305 conditions per place. [2024-11-22 21:41:57,541 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 32 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2024-11-22 21:41:57,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 200 flow [2024-11-22 21:41:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:41:57,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:41:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-11-22 21:41:57,542 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-11-22 21:41:57,542 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 112 flow. Second operand 3 states and 122 transitions. [2024-11-22 21:41:57,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 200 flow [2024-11-22 21:41:57,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:41:57,544 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 146 flow [2024-11-22 21:41:57,544 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2024-11-22 21:41:57,545 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2024-11-22 21:41:57,545 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 146 flow [2024-11-22 21:41:57,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:41:57,545 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:57,546 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:41:57,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:41:57,546 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:41:57,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:57,547 INFO L85 PathProgramCache]: Analyzing trace with hash 851081330, now seen corresponding path program 1 times [2024-11-22 21:41:57,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:57,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873995899] [2024-11-22 21:41:57,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:41:57,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:41:57,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:57,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873995899] [2024-11-22 21:41:57,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873995899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:57,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878482139] [2024-11-22 21:41:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:41:57,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:57,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:57,721 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:41:57,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:41:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:41:57,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 21:41:57,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:57,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:41:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:41:57,890 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:41:57,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878482139] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:57,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:57,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-22 21:41:57,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536653590] [2024-11-22 21:41:57,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:57,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 21:41:57,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:57,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 21:41:57,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-22 21:41:58,126 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-22 21:41:58,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:41:58,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:58,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-22 21:41:58,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:41:58,389 INFO L124 PetriNetUnfolderBase]: 208/473 cut-off events. [2024-11-22 21:41:58,389 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-22 21:41:58,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 855 conditions, 473 events. 208/473 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2128 event pairs, 124 based on Foata normal form. 3/392 useless extension candidates. Maximal degree in co-relation 766. Up to 307 conditions per place. [2024-11-22 21:41:58,393 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 41 selfloop transitions, 21 changer transitions 0/81 dead transitions. [2024-11-22 21:41:58,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 81 transitions, 358 flow [2024-11-22 21:41:58,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:41:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:41:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2024-11-22 21:41:58,395 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-11-22 21:41:58,395 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 146 flow. Second operand 6 states and 230 transitions. [2024-11-22 21:41:58,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 81 transitions, 358 flow [2024-11-22 21:41:58,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:41:58,397 INFO L231 Difference]: Finished difference. Result has 59 places, 69 transitions, 292 flow [2024-11-22 21:41:58,397 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=59, PETRI_TRANSITIONS=69} [2024-11-22 21:41:58,398 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2024-11-22 21:41:58,398 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 69 transitions, 292 flow [2024-11-22 21:41:58,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:41:58,398 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:41:58,399 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-22 21:41:58,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:41:58,602 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 [2024-11-22 21:41:58,603 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:41:58,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:41:58,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1431238467, now seen corresponding path program 2 times [2024-11-22 21:41:58,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:41:58,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029783261] [2024-11-22 21:41:58,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:41:58,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:41:58,619 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:58,619 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:41:58,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:41:58,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029783261] [2024-11-22 21:41:58,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029783261] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:41:58,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356193833] [2024-11-22 21:41:58,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:41:58,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:41:58,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:41:58,792 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:41:58,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:41:58,853 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:41:58,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:41:58,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-22 21:41:58,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:41:58,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:41:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:41:58,957 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:41:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:41:59,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356193833] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:41:59,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:41:59,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-22 21:41:59,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773089694] [2024-11-22 21:41:59,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:41:59,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:41:59,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:41:59,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:41:59,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:41:59,663 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-22 21:41:59,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 292 flow. Second operand has 18 states, 18 states have (on average 27.833333333333332) internal successors, (501), 18 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:41:59,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:41:59,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-22 21:41:59,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:00,059 INFO L124 PetriNetUnfolderBase]: 211/479 cut-off events. [2024-11-22 21:42:00,059 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-22 21:42:00,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 479 events. 211/479 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2154 event pairs, 124 based on Foata normal form. 6/404 useless extension candidates. Maximal degree in co-relation 798. Up to 296 conditions per place. [2024-11-22 21:42:00,062 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 34 selfloop transitions, 34 changer transitions 0/87 dead transitions. [2024-11-22 21:42:00,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 87 transitions, 464 flow [2024-11-22 21:42:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:42:00,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:42:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 308 transitions. [2024-11-22 21:42:00,064 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5703703703703704 [2024-11-22 21:42:00,064 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 292 flow. Second operand 9 states and 308 transitions. [2024-11-22 21:42:00,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 87 transitions, 464 flow [2024-11-22 21:42:00,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 87 transitions, 378 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-22 21:42:00,066 INFO L231 Difference]: Finished difference. Result has 60 places, 75 transitions, 304 flow [2024-11-22 21:42:00,067 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=304, PETRI_PLACES=60, PETRI_TRANSITIONS=75} [2024-11-22 21:42:00,067 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 0 predicate places. [2024-11-22 21:42:00,067 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 75 transitions, 304 flow [2024-11-22 21:42:00,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 27.833333333333332) internal successors, (501), 18 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:00,068 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:00,068 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:00,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-22 21:42:00,268 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 [2024-11-22 21:42:00,269 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:00,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:00,270 INFO L85 PathProgramCache]: Analyzing trace with hash -738357287, now seen corresponding path program 1 times [2024-11-22 21:42:00,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:00,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282711083] [2024-11-22 21:42:00,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:00,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:42:00,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:00,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282711083] [2024-11-22 21:42:00,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282711083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:00,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903014479] [2024-11-22 21:42:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:00,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:00,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:00,383 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:00,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:42:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:00,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:42:00,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:42:00,505 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:42:00,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903014479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:00,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:00,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2024-11-22 21:42:00,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638630921] [2024-11-22 21:42:00,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:00,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:42:00,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:00,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:42:00,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:42:00,569 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-11-22 21:42:00,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 75 transitions, 304 flow. Second operand has 11 states, 11 states have (on average 31.636363636363637) internal successors, (348), 11 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:00,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:00,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-11-22 21:42:00,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:00,717 INFO L124 PetriNetUnfolderBase]: 202/470 cut-off events. [2024-11-22 21:42:00,717 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-22 21:42:00,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 470 events. 202/470 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2075 event pairs, 124 based on Foata normal form. 9/398 useless extension candidates. Maximal degree in co-relation 734. Up to 299 conditions per place. [2024-11-22 21:42:00,720 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 35 selfloop transitions, 24 changer transitions 0/78 dead transitions. [2024-11-22 21:42:00,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 416 flow [2024-11-22 21:42:00,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:42:00,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:42:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 268 transitions. [2024-11-22 21:42:00,721 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-11-22 21:42:00,721 INFO L175 Difference]: Start difference. First operand has 60 places, 75 transitions, 304 flow. Second operand 7 states and 268 transitions. [2024-11-22 21:42:00,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 416 flow [2024-11-22 21:42:00,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 370 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-11-22 21:42:00,723 INFO L231 Difference]: Finished difference. Result has 60 places, 66 transitions, 252 flow [2024-11-22 21:42:00,723 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=252, PETRI_PLACES=60, PETRI_TRANSITIONS=66} [2024-11-22 21:42:00,724 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 0 predicate places. [2024-11-22 21:42:00,724 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 66 transitions, 252 flow [2024-11-22 21:42:00,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.636363636363637) internal successors, (348), 11 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:00,725 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:00,725 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:00,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:42:00,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:00,927 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:00,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:00,928 INFO L85 PathProgramCache]: Analyzing trace with hash 2018924306, now seen corresponding path program 2 times [2024-11-22 21:42:00,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:00,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878123372] [2024-11-22 21:42:00,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:42:00,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:00,946 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:42:00,948 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:42:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-22 21:42:01,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:01,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878123372] [2024-11-22 21:42:01,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878123372] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:42:01,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:42:01,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:42:01,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093963860] [2024-11-22 21:42:01,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:01,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:42:01,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:01,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:42:01,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:42:01,062 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-22 21:42:01,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 66 transitions, 252 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:01,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:01,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-22 21:42:01,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:01,191 INFO L124 PetriNetUnfolderBase]: 343/750 cut-off events. [2024-11-22 21:42:01,191 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-22 21:42:01,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 750 events. 343/750 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4010 event pairs, 234 based on Foata normal form. 0/637 useless extension candidates. Maximal degree in co-relation 1227. Up to 494 conditions per place. [2024-11-22 21:42:01,195 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 46 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2024-11-22 21:42:01,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 64 transitions, 346 flow [2024-11-22 21:42:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:42:01,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:42:01,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-22 21:42:01,196 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-11-22 21:42:01,196 INFO L175 Difference]: Start difference. First operand has 60 places, 66 transitions, 252 flow. Second operand 5 states and 143 transitions. [2024-11-22 21:42:01,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 64 transitions, 346 flow [2024-11-22 21:42:01,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 64 transitions, 298 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:42:01,199 INFO L231 Difference]: Finished difference. Result has 56 places, 64 transitions, 206 flow [2024-11-22 21:42:01,199 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=56, PETRI_TRANSITIONS=64} [2024-11-22 21:42:01,200 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -4 predicate places. [2024-11-22 21:42:01,200 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 64 transitions, 206 flow [2024-11-22 21:42:01,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:01,200 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:01,200 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:01,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 21:42:01,201 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:01,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:01,201 INFO L85 PathProgramCache]: Analyzing trace with hash 2018924307, now seen corresponding path program 1 times [2024-11-22 21:42:01,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:01,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873567342] [2024-11-22 21:42:01,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:01,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-22 21:42:01,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:01,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873567342] [2024-11-22 21:42:01,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873567342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:01,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583402542] [2024-11-22 21:42:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:01,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:01,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:01,939 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:01,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:42:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:02,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-22 21:42:02,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:02,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:42:02,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:02,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:42:02,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-22 21:42:02,183 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:42:02,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:42:02,232 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:42:02,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-22 21:42:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:02,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:02,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583402542] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:02,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:42:02,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 9] total 25 [2024-11-22 21:42:02,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157245574] [2024-11-22 21:42:02,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:02,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:42:02,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:02,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:42:02,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2024-11-22 21:42:03,192 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-22 21:42:03,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 64 transitions, 206 flow. Second operand has 11 states, 11 states have (on average 28.90909090909091) internal successors, (318), 11 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:03,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:03,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-22 21:42:03,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:03,423 INFO L124 PetriNetUnfolderBase]: 459/911 cut-off events. [2024-11-22 21:42:03,423 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:42:03,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1698 conditions, 911 events. 459/911 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4496 event pairs, 169 based on Foata normal form. 0/772 useless extension candidates. Maximal degree in co-relation 1566. Up to 351 conditions per place. [2024-11-22 21:42:03,427 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 60 selfloop transitions, 6 changer transitions 0/81 dead transitions. [2024-11-22 21:42:03,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 377 flow [2024-11-22 21:42:03,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:42:03,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:42:03,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-11-22 21:42:03,429 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-11-22 21:42:03,429 INFO L175 Difference]: Start difference. First operand has 56 places, 64 transitions, 206 flow. Second operand 6 states and 211 transitions. [2024-11-22 21:42:03,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 377 flow [2024-11-22 21:42:03,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 81 transitions, 372 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:42:03,430 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 226 flow [2024-11-22 21:42:03,431 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=60, PETRI_TRANSITIONS=65} [2024-11-22 21:42:03,431 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 0 predicate places. [2024-11-22 21:42:03,431 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 226 flow [2024-11-22 21:42:03,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 28.90909090909091) internal successors, (318), 11 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:03,432 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:03,432 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:03,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-22 21:42:03,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:03,633 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:03,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:03,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1837855078, now seen corresponding path program 1 times [2024-11-22 21:42:03,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:03,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282426662] [2024-11-22 21:42:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:03,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-22 21:42:03,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:03,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282426662] [2024-11-22 21:42:03,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282426662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:42:03,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:42:03,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:42:03,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500640981] [2024-11-22 21:42:03,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:03,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:42:03,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:03,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:42:03,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:42:03,826 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-11-22 21:42:03,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 65 transitions, 226 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:03,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:03,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-11-22 21:42:03,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:03,920 INFO L124 PetriNetUnfolderBase]: 400/790 cut-off events. [2024-11-22 21:42:03,920 INFO L125 PetriNetUnfolderBase]: For 228/255 co-relation queries the response was YES. [2024-11-22 21:42:03,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1633 conditions, 790 events. 400/790 cut-off events. For 228/255 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3709 event pairs, 299 based on Foata normal form. 29/765 useless extension candidates. Maximal degree in co-relation 1498. Up to 592 conditions per place. [2024-11-22 21:42:03,923 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 45 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2024-11-22 21:42:03,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 63 transitions, 318 flow [2024-11-22 21:42:03,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:42:03,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:42:03,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-11-22 21:42:03,924 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-11-22 21:42:03,924 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 226 flow. Second operand 5 states and 147 transitions. [2024-11-22 21:42:03,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 63 transitions, 318 flow [2024-11-22 21:42:03,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 310 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:42:03,926 INFO L231 Difference]: Finished difference. Result has 58 places, 63 transitions, 220 flow [2024-11-22 21:42:03,926 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=58, PETRI_TRANSITIONS=63} [2024-11-22 21:42:03,926 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -2 predicate places. [2024-11-22 21:42:03,926 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 63 transitions, 220 flow [2024-11-22 21:42:03,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:03,927 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:03,927 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:03,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 21:42:03,927 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:03,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:03,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1837855077, now seen corresponding path program 1 times [2024-11-22 21:42:03,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:03,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265230074] [2024-11-22 21:42:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:03,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-22 21:42:04,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:04,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265230074] [2024-11-22 21:42:04,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265230074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:04,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783432476] [2024-11-22 21:42:04,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:04,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:04,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:04,181 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:04,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:42:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:04,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-22 21:42:04,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:04,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:42:04,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:04,354 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:42:04,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-22 21:42:04,367 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:42:04,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:42:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:04,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:04,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783432476] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:04,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:42:04,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 22 [2024-11-22 21:42:04,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626217252] [2024-11-22 21:42:04,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:04,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:42:04,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:04,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:42:04,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2024-11-22 21:42:05,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-22 21:42:05,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 63 transitions, 220 flow. Second operand has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:05,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:05,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-22 21:42:05,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:05,420 INFO L124 PetriNetUnfolderBase]: 400/786 cut-off events. [2024-11-22 21:42:05,421 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-11-22 21:42:05,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1648 conditions, 786 events. 400/786 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3625 event pairs, 169 based on Foata normal form. 26/738 useless extension candidates. Maximal degree in co-relation 1512. Up to 377 conditions per place. [2024-11-22 21:42:05,424 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 60 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2024-11-22 21:42:05,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 80 transitions, 392 flow [2024-11-22 21:42:05,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:42:05,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:42:05,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2024-11-22 21:42:05,427 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-22 21:42:05,427 INFO L175 Difference]: Start difference. First operand has 58 places, 63 transitions, 220 flow. Second operand 6 states and 216 transitions. [2024-11-22 21:42:05,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 80 transitions, 392 flow [2024-11-22 21:42:05,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 387 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:42:05,429 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 236 flow [2024-11-22 21:42:05,429 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2024-11-22 21:42:05,429 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-11-22 21:42:05,429 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 236 flow [2024-11-22 21:42:05,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:05,430 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:05,430 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:05,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 21:42:05,633 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 [2024-11-22 21:42:05,634 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:05,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:05,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1187991542, now seen corresponding path program 1 times [2024-11-22 21:42:05,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:05,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213840049] [2024-11-22 21:42:05,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:05,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-22 21:42:06,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:06,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213840049] [2024-11-22 21:42:06,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213840049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:06,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768707113] [2024-11-22 21:42:06,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:06,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:06,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:06,505 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:06,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:42:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:06,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-22 21:42:06,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:06,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:06,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:42:06,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:42:06,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-22 21:42:06,733 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:42:06,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:42:06,805 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:42:06,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-22 21:42:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:07,204 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:07,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768707113] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:07,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:42:07,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 9] total 28 [2024-11-22 21:42:07,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386421752] [2024-11-22 21:42:07,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:07,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:42:07,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:07,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:42:07,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2024-11-22 21:42:08,031 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-22 21:42:08,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 236 flow. Second operand has 11 states, 11 states have (on average 29.09090909090909) internal successors, (320), 11 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:08,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:08,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-22 21:42:08,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:08,352 INFO L124 PetriNetUnfolderBase]: 775/1473 cut-off events. [2024-11-22 21:42:08,353 INFO L125 PetriNetUnfolderBase]: For 996/1099 co-relation queries the response was YES. [2024-11-22 21:42:08,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3266 conditions, 1473 events. 775/1473 cut-off events. For 996/1099 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8300 event pairs, 315 based on Foata normal form. 0/1283 useless extension candidates. Maximal degree in co-relation 3128. Up to 604 conditions per place. [2024-11-22 21:42:08,359 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 60 selfloop transitions, 6 changer transitions 0/80 dead transitions. [2024-11-22 21:42:08,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 80 transitions, 421 flow [2024-11-22 21:42:08,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:42:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:42:08,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2024-11-22 21:42:08,360 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-11-22 21:42:08,360 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 236 flow. Second operand 6 states and 209 transitions. [2024-11-22 21:42:08,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 80 transitions, 421 flow [2024-11-22 21:42:08,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 80 transitions, 411 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:42:08,362 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 253 flow [2024-11-22 21:42:08,362 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=253, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2024-11-22 21:42:08,362 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2024-11-22 21:42:08,362 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 253 flow [2024-11-22 21:42:08,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 29.09090909090909) internal successors, (320), 11 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:08,363 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:08,363 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:08,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:42:08,567 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 [2024-11-22 21:42:08,567 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:08,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:08,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1826968716, now seen corresponding path program 1 times [2024-11-22 21:42:08,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:08,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923647650] [2024-11-22 21:42:08,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:08,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-22 21:42:08,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:08,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923647650] [2024-11-22 21:42:08,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923647650] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:42:08,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:42:08,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:42:08,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678149827] [2024-11-22 21:42:08,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:08,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:42:08,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:08,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:42:08,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:42:08,783 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-22 21:42:08,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 253 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:08,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:08,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-22 21:42:08,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:08,921 INFO L124 PetriNetUnfolderBase]: 520/1058 cut-off events. [2024-11-22 21:42:08,921 INFO L125 PetriNetUnfolderBase]: For 819/921 co-relation queries the response was YES. [2024-11-22 21:42:08,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2509 conditions, 1058 events. 520/1058 cut-off events. For 819/921 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5705 event pairs, 406 based on Foata normal form. 36/1017 useless extension candidates. Maximal degree in co-relation 2369. Up to 773 conditions per place. [2024-11-22 21:42:08,926 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 46 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-11-22 21:42:08,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 345 flow [2024-11-22 21:42:08,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:42:08,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:42:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-11-22 21:42:08,927 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-11-22 21:42:08,927 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 253 flow. Second operand 4 states and 127 transitions. [2024-11-22 21:42:08,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 345 flow [2024-11-22 21:42:08,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 63 transitions, 337 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:42:08,928 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 245 flow [2024-11-22 21:42:08,929 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-11-22 21:42:08,929 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-11-22 21:42:08,929 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 245 flow [2024-11-22 21:42:08,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:08,929 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:08,929 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:08,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-22 21:42:08,930 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:08,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:08,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1826968717, now seen corresponding path program 1 times [2024-11-22 21:42:08,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:08,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040862661] [2024-11-22 21:42:08,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:08,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:09,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:09,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040862661] [2024-11-22 21:42:09,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040862661] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:09,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655889719] [2024-11-22 21:42:09,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:09,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:09,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:09,199 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:09,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:42:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:09,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-22 21:42:09,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:09,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:42:09,449 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:42:09,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-22 21:42:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:09,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-22 21:42:09,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655889719] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:09,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:42:09,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 10] total 18 [2024-11-22 21:42:09,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110745099] [2024-11-22 21:42:09,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:09,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:42:09,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:09,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:42:09,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-22 21:42:09,651 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-22 21:42:09,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 245 flow. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:09,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:09,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-22 21:42:09,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:09,855 INFO L124 PetriNetUnfolderBase]: 668/1254 cut-off events. [2024-11-22 21:42:09,856 INFO L125 PetriNetUnfolderBase]: For 825/912 co-relation queries the response was YES. [2024-11-22 21:42:09,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3055 conditions, 1254 events. 668/1254 cut-off events. For 825/912 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6589 event pairs, 315 based on Foata normal form. 46/1216 useless extension candidates. Maximal degree in co-relation 2915. Up to 650 conditions per place. [2024-11-22 21:42:09,861 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 61 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2024-11-22 21:42:09,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 79 transitions, 429 flow [2024-11-22 21:42:09,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:42:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:42:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 186 transitions. [2024-11-22 21:42:09,863 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-11-22 21:42:09,863 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 245 flow. Second operand 5 states and 186 transitions. [2024-11-22 21:42:09,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 79 transitions, 429 flow [2024-11-22 21:42:09,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 79 transitions, 426 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:42:09,864 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 261 flow [2024-11-22 21:42:09,865 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2024-11-22 21:42:09,865 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2024-11-22 21:42:09,865 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 261 flow [2024-11-22 21:42:09,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:09,865 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:09,865 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:09,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 21:42:10,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:10,069 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:10,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:10,070 INFO L85 PathProgramCache]: Analyzing trace with hash -947140512, now seen corresponding path program 1 times [2024-11-22 21:42:10,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:10,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462670312] [2024-11-22 21:42:10,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:10,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-22 21:42:10,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:10,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462670312] [2024-11-22 21:42:10,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462670312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:10,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657036537] [2024-11-22 21:42:10,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:10,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:10,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:10,745 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:10,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:42:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:10,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-22 21:42:10,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:10,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:42:10,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:10,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:42:10,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-22 21:42:10,926 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:42:10,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:42:10,964 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:42:10,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-22 21:42:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:11,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:11,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657036537] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:11,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:11,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 31 [2024-11-22 21:42:11,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995603959] [2024-11-22 21:42:11,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:11,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-22 21:42:11,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:11,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-22 21:42:11,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2024-11-22 21:42:12,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-22 21:42:12,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 261 flow. Second operand has 33 states, 33 states have (on average 23.12121212121212) internal successors, (763), 33 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:12,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:12,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-22 21:42:12,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:13,650 INFO L124 PetriNetUnfolderBase]: 1736/3098 cut-off events. [2024-11-22 21:42:13,651 INFO L125 PetriNetUnfolderBase]: For 3287/3492 co-relation queries the response was YES. [2024-11-22 21:42:13,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8158 conditions, 3098 events. 1736/3098 cut-off events. For 3287/3492 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 17791 event pairs, 285 based on Foata normal form. 126/3149 useless extension candidates. Maximal degree in co-relation 8016. Up to 577 conditions per place. [2024-11-22 21:42:13,669 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 115 selfloop transitions, 18 changer transitions 0/145 dead transitions. [2024-11-22 21:42:13,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 145 transitions, 812 flow [2024-11-22 21:42:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-22 21:42:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-22 21:42:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 394 transitions. [2024-11-22 21:42:13,670 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5051282051282051 [2024-11-22 21:42:13,670 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 261 flow. Second operand 13 states and 394 transitions. [2024-11-22 21:42:13,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 145 transitions, 812 flow [2024-11-22 21:42:13,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 145 transitions, 798 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:42:13,674 INFO L231 Difference]: Finished difference. Result has 77 places, 67 transitions, 329 flow [2024-11-22 21:42:13,674 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=329, PETRI_PLACES=77, PETRI_TRANSITIONS=67} [2024-11-22 21:42:13,674 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 17 predicate places. [2024-11-22 21:42:13,675 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 67 transitions, 329 flow [2024-11-22 21:42:13,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 23.12121212121212) internal successors, (763), 33 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:13,676 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:13,676 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:13,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-22 21:42:13,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-22 21:42:13,877 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:13,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:13,877 INFO L85 PathProgramCache]: Analyzing trace with hash 761423058, now seen corresponding path program 1 times [2024-11-22 21:42:13,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:13,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765106875] [2024-11-22 21:42:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:14,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:14,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765106875] [2024-11-22 21:42:14,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765106875] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:14,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638416443] [2024-11-22 21:42:14,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:14,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:14,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:14,248 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:14,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 21:42:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:14,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-22 21:42:14,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:14,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:42:14,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:14,451 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:42:14,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-22 21:42:14,467 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:42:14,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:42:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:14,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:15,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638416443] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:15,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:42:15,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-11-22 21:42:15,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664275956] [2024-11-22 21:42:15,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:15,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:42:15,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:15,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:42:15,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-11-22 21:42:15,228 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-22 21:42:15,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 67 transitions, 329 flow. Second operand has 10 states, 10 states have (on average 29.5) internal successors, (295), 10 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:15,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:15,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-22 21:42:15,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:15,657 INFO L124 PetriNetUnfolderBase]: 2511/4247 cut-off events. [2024-11-22 21:42:15,658 INFO L125 PetriNetUnfolderBase]: For 6969/7679 co-relation queries the response was YES. [2024-11-22 21:42:15,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11775 conditions, 4247 events. 2511/4247 cut-off events. For 6969/7679 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 25856 event pairs, 1256 based on Foata normal form. 0/4046 useless extension candidates. Maximal degree in co-relation 11619. Up to 2119 conditions per place. [2024-11-22 21:42:15,683 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 64 selfloop transitions, 6 changer transitions 0/84 dead transitions. [2024-11-22 21:42:15,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 84 transitions, 564 flow [2024-11-22 21:42:15,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:42:15,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:42:15,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 207 transitions. [2024-11-22 21:42:15,685 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-22 21:42:15,685 INFO L175 Difference]: Start difference. First operand has 77 places, 67 transitions, 329 flow. Second operand 6 states and 207 transitions. [2024-11-22 21:42:15,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 84 transitions, 564 flow [2024-11-22 21:42:15,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 84 transitions, 557 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:42:15,692 INFO L231 Difference]: Finished difference. Result has 81 places, 68 transitions, 349 flow [2024-11-22 21:42:15,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=349, PETRI_PLACES=81, PETRI_TRANSITIONS=68} [2024-11-22 21:42:15,692 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 21 predicate places. [2024-11-22 21:42:15,693 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 68 transitions, 349 flow [2024-11-22 21:42:15,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.5) internal successors, (295), 10 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:15,693 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:15,693 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:15,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 21:42:15,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-22 21:42:15,897 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:15,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:15,898 INFO L85 PathProgramCache]: Analyzing trace with hash 703416046, now seen corresponding path program 1 times [2024-11-22 21:42:15,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:15,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556746671] [2024-11-22 21:42:15,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:15,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-22 21:42:16,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:16,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556746671] [2024-11-22 21:42:16,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556746671] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:16,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907456791] [2024-11-22 21:42:16,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:16,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:16,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:16,176 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:16,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 21:42:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:16,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-22 21:42:16,285 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:16,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:16,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:42:16,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-22 21:42:16,398 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:42:16,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:42:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:16,478 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:16,597 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 52 treesize of output 48 [2024-11-22 21:42:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:16,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907456791] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:16,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:16,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 25 [2024-11-22 21:42:16,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913595097] [2024-11-22 21:42:16,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:16,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-22 21:42:16,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:16,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-22 21:42:16,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2024-11-22 21:42:17,725 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-22 21:42:17,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 68 transitions, 349 flow. Second operand has 26 states, 26 states have (on average 27.115384615384617) internal successors, (705), 26 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:17,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:17,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-22 21:42:17,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:18,586 INFO L124 PetriNetUnfolderBase]: 1928/3539 cut-off events. [2024-11-22 21:42:18,586 INFO L125 PetriNetUnfolderBase]: For 6187/6588 co-relation queries the response was YES. [2024-11-22 21:42:18,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10829 conditions, 3539 events. 1928/3539 cut-off events. For 6187/6588 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 22301 event pairs, 487 based on Foata normal form. 186/3663 useless extension candidates. Maximal degree in co-relation 10669. Up to 894 conditions per place. [2024-11-22 21:42:18,607 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 112 selfloop transitions, 21 changer transitions 0/149 dead transitions. [2024-11-22 21:42:18,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 149 transitions, 922 flow [2024-11-22 21:42:18,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 21:42:18,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-22 21:42:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 550 transitions. [2024-11-22 21:42:18,609 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5392156862745098 [2024-11-22 21:42:18,609 INFO L175 Difference]: Start difference. First operand has 81 places, 68 transitions, 349 flow. Second operand 17 states and 550 transitions. [2024-11-22 21:42:18,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 149 transitions, 922 flow [2024-11-22 21:42:18,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 149 transitions, 902 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-22 21:42:18,618 INFO L231 Difference]: Finished difference. Result has 96 places, 69 transitions, 404 flow [2024-11-22 21:42:18,618 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=404, PETRI_PLACES=96, PETRI_TRANSITIONS=69} [2024-11-22 21:42:18,619 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 36 predicate places. [2024-11-22 21:42:18,619 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 69 transitions, 404 flow [2024-11-22 21:42:18,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 27.115384615384617) internal successors, (705), 26 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:18,619 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:18,619 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:18,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-22 21:42:18,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-22 21:42:18,824 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:18,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:18,824 INFO L85 PathProgramCache]: Analyzing trace with hash -924656910, now seen corresponding path program 1 times [2024-11-22 21:42:18,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:18,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954477789] [2024-11-22 21:42:18,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:18,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-22 21:42:19,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:19,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954477789] [2024-11-22 21:42:19,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954477789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:19,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088502731] [2024-11-22 21:42:19,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:19,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:19,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:19,321 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:19,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 21:42:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:19,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-22 21:42:19,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:19,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:19,480 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-22 21:42:19,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-22 21:42:19,543 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2024-11-22 21:42:19,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 22 [2024-11-22 21:42:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:19,816 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:20,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088502731] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:20,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:20,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 32 [2024-11-22 21:42:20,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432359311] [2024-11-22 21:42:20,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:20,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-22 21:42:20,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:20,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-22 21:42:20,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=795, Unknown=0, NotChecked=0, Total=1122 [2024-11-22 21:42:21,044 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-22 21:42:21,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 69 transitions, 404 flow. Second operand has 34 states, 34 states have (on average 23.294117647058822) internal successors, (792), 34 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:21,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:21,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-22 21:42:21,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:22,725 INFO L124 PetriNetUnfolderBase]: 5974/10435 cut-off events. [2024-11-22 21:42:22,725 INFO L125 PetriNetUnfolderBase]: For 24785/25920 co-relation queries the response was YES. [2024-11-22 21:42:22,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32464 conditions, 10435 events. 5974/10435 cut-off events. For 24785/25920 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 76014 event pairs, 1204 based on Foata normal form. 471/10782 useless extension candidates. Maximal degree in co-relation 32274. Up to 2107 conditions per place. [2024-11-22 21:42:22,779 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 134 selfloop transitions, 28 changer transitions 0/176 dead transitions. [2024-11-22 21:42:22,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 176 transitions, 1370 flow [2024-11-22 21:42:22,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-22 21:42:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-22 21:42:22,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 582 transitions. [2024-11-22 21:42:22,781 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-11-22 21:42:22,781 INFO L175 Difference]: Start difference. First operand has 96 places, 69 transitions, 404 flow. Second operand 21 states and 582 transitions. [2024-11-22 21:42:22,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 176 transitions, 1370 flow [2024-11-22 21:42:22,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 176 transitions, 1283 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-11-22 21:42:22,794 INFO L231 Difference]: Finished difference. Result has 112 places, 75 transitions, 486 flow [2024-11-22 21:42:22,794 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=486, PETRI_PLACES=112, PETRI_TRANSITIONS=75} [2024-11-22 21:42:22,795 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 52 predicate places. [2024-11-22 21:42:22,795 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 75 transitions, 486 flow [2024-11-22 21:42:22,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 23.294117647058822) internal successors, (792), 34 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:22,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:22,795 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:22,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-22 21:42:22,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-22 21:42:22,998 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:22,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:22,998 INFO L85 PathProgramCache]: Analyzing trace with hash 2129279182, now seen corresponding path program 1 times [2024-11-22 21:42:22,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:22,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838970865] [2024-11-22 21:42:22,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:22,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:23,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:23,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838970865] [2024-11-22 21:42:23,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838970865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:23,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877000581] [2024-11-22 21:42:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:23,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:23,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:23,299 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:23,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 21:42:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:23,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 21:42:23,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:23,544 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:23,602 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 [2024-11-22 21:42:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:23,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877000581] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:23,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:23,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-22 21:42:23,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008051547] [2024-11-22 21:42:23,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:23,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-22 21:42:23,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:23,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-22 21:42:23,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-22 21:42:24,207 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-22 21:42:24,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 75 transitions, 486 flow. Second operand has 25 states, 25 states have (on average 30.48) internal successors, (762), 25 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:24,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:24,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-22 21:42:24,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:25,620 INFO L124 PetriNetUnfolderBase]: 6431/11862 cut-off events. [2024-11-22 21:42:25,621 INFO L125 PetriNetUnfolderBase]: For 29510/31274 co-relation queries the response was YES. [2024-11-22 21:42:25,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37694 conditions, 11862 events. 6431/11862 cut-off events. For 29510/31274 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 94258 event pairs, 2903 based on Foata normal form. 644/12029 useless extension candidates. Maximal degree in co-relation 37600. Up to 5070 conditions per place. [2024-11-22 21:42:25,688 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 92 selfloop transitions, 20 changer transitions 0/129 dead transitions. [2024-11-22 21:42:25,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 129 transitions, 1064 flow [2024-11-22 21:42:25,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:42:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:42:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 362 transitions. [2024-11-22 21:42:25,690 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-11-22 21:42:25,690 INFO L175 Difference]: Start difference. First operand has 112 places, 75 transitions, 486 flow. Second operand 10 states and 362 transitions. [2024-11-22 21:42:25,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 129 transitions, 1064 flow [2024-11-22 21:42:25,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 129 transitions, 1030 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-22 21:42:25,709 INFO L231 Difference]: Finished difference. Result has 115 places, 77 transitions, 516 flow [2024-11-22 21:42:25,709 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=516, PETRI_PLACES=115, PETRI_TRANSITIONS=77} [2024-11-22 21:42:25,710 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 55 predicate places. [2024-11-22 21:42:25,710 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 77 transitions, 516 flow [2024-11-22 21:42:25,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 30.48) internal successors, (762), 25 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:25,710 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:25,710 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:25,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 21:42:25,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-22 21:42:25,917 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:25,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:25,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1400407717, now seen corresponding path program 1 times [2024-11-22 21:42:25,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:25,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278441605] [2024-11-22 21:42:25,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:25,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-22 21:42:26,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:26,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278441605] [2024-11-22 21:42:26,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278441605] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:26,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220099160] [2024-11-22 21:42:26,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:26,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:26,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:26,389 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:26,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 21:42:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:26,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-22 21:42:26,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:26,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:26,755 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 [2024-11-22 21:42:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:26,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220099160] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:26,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:26,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 24 [2024-11-22 21:42:26,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705532674] [2024-11-22 21:42:26,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:26,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-22 21:42:26,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:26,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-22 21:42:26,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2024-11-22 21:42:27,492 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-22 21:42:27,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 77 transitions, 516 flow. Second operand has 25 states, 25 states have (on average 30.12) internal successors, (753), 25 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:27,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:27,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-22 21:42:27,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:28,919 INFO L124 PetriNetUnfolderBase]: 6190/11645 cut-off events. [2024-11-22 21:42:28,919 INFO L125 PetriNetUnfolderBase]: For 31468/32469 co-relation queries the response was YES. [2024-11-22 21:42:28,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39254 conditions, 11645 events. 6190/11645 cut-off events. For 31468/32469 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 91685 event pairs, 1561 based on Foata normal form. 633/11993 useless extension candidates. Maximal degree in co-relation 39154. Up to 2986 conditions per place. [2024-11-22 21:42:28,983 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 130 selfloop transitions, 22 changer transitions 0/169 dead transitions. [2024-11-22 21:42:28,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 169 transitions, 1356 flow [2024-11-22 21:42:28,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 21:42:28,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-22 21:42:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 453 transitions. [2024-11-22 21:42:28,988 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-11-22 21:42:28,988 INFO L175 Difference]: Start difference. First operand has 115 places, 77 transitions, 516 flow. Second operand 12 states and 453 transitions. [2024-11-22 21:42:28,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 169 transitions, 1356 flow [2024-11-22 21:42:29,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 169 transitions, 1317 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-22 21:42:29,024 INFO L231 Difference]: Finished difference. Result has 123 places, 77 transitions, 533 flow [2024-11-22 21:42:29,024 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=533, PETRI_PLACES=123, PETRI_TRANSITIONS=77} [2024-11-22 21:42:29,024 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 63 predicate places. [2024-11-22 21:42:29,025 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 77 transitions, 533 flow [2024-11-22 21:42:29,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 30.12) internal successors, (753), 25 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:29,025 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:29,025 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:29,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-22 21:42:29,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-22 21:42:29,226 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:29,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:29,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1832891411, now seen corresponding path program 1 times [2024-11-22 21:42:29,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:29,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924426782] [2024-11-22 21:42:29,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:29,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:29,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:29,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924426782] [2024-11-22 21:42:29,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924426782] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:29,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148708273] [2024-11-22 21:42:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:29,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:29,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:29,548 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:29,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 21:42:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:29,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-22 21:42:29,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:29,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:29,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:42:29,735 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:42:29,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-22 21:42:29,748 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:42:29,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:42:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:30,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:30,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148708273] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:30,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:30,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-11-22 21:42:30,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017883264] [2024-11-22 21:42:30,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:30,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-22 21:42:30,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:30,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-22 21:42:30,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2024-11-22 21:42:31,180 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-22 21:42:31,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 77 transitions, 533 flow. Second operand has 29 states, 29 states have (on average 23.586206896551722) internal successors, (684), 29 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:31,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:31,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-22 21:42:31,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:34,245 INFO L124 PetriNetUnfolderBase]: 12351/20643 cut-off events. [2024-11-22 21:42:34,245 INFO L125 PetriNetUnfolderBase]: For 73164/75812 co-relation queries the response was YES. [2024-11-22 21:42:34,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72742 conditions, 20643 events. 12351/20643 cut-off events. For 73164/75812 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 156194 event pairs, 2903 based on Foata normal form. 966/21484 useless extension candidates. Maximal degree in co-relation 72639. Up to 4748 conditions per place. [2024-11-22 21:42:34,352 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 135 selfloop transitions, 23 changer transitions 0/173 dead transitions. [2024-11-22 21:42:34,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 173 transitions, 1543 flow [2024-11-22 21:42:34,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 21:42:34,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-22 21:42:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 470 transitions. [2024-11-22 21:42:34,354 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46078431372549017 [2024-11-22 21:42:34,354 INFO L175 Difference]: Start difference. First operand has 123 places, 77 transitions, 533 flow. Second operand 17 states and 470 transitions. [2024-11-22 21:42:34,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 173 transitions, 1543 flow [2024-11-22 21:42:34,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 173 transitions, 1459 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-11-22 21:42:34,401 INFO L231 Difference]: Finished difference. Result has 132 places, 79 transitions, 566 flow [2024-11-22 21:42:34,401 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=566, PETRI_PLACES=132, PETRI_TRANSITIONS=79} [2024-11-22 21:42:34,402 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 72 predicate places. [2024-11-22 21:42:34,402 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 79 transitions, 566 flow [2024-11-22 21:42:34,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 23.586206896551722) internal successors, (684), 29 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:34,402 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:34,402 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:34,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-22 21:42:34,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:34,606 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:34,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:34,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1595369362, now seen corresponding path program 1 times [2024-11-22 21:42:34,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:34,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580236181] [2024-11-22 21:42:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:34,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:34,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:34,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580236181] [2024-11-22 21:42:34,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580236181] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:34,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020351164] [2024-11-22 21:42:34,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:34,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:34,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:34,911 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:34,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 21:42:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:35,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-22 21:42:35,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:35,203 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:35,315 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 [2024-11-22 21:42:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:35,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020351164] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:35,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:35,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-22 21:42:35,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108346814] [2024-11-22 21:42:35,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:35,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-22 21:42:35,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:35,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-22 21:42:35,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-11-22 21:42:36,304 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-22 21:42:36,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 79 transitions, 566 flow. Second operand has 32 states, 32 states have (on average 30.15625) internal successors, (965), 32 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:36,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:36,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-22 21:42:36,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:39,131 INFO L124 PetriNetUnfolderBase]: 10871/20688 cut-off events. [2024-11-22 21:42:39,132 INFO L125 PetriNetUnfolderBase]: For 73308/75618 co-relation queries the response was YES. [2024-11-22 21:42:39,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75511 conditions, 20688 events. 10871/20688 cut-off events. For 73308/75618 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 177862 event pairs, 2903 based on Foata normal form. 966/21419 useless extension candidates. Maximal degree in co-relation 75404. Up to 5070 conditions per place. [2024-11-22 21:42:39,265 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 152 selfloop transitions, 23 changer transitions 0/193 dead transitions. [2024-11-22 21:42:39,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 193 transitions, 1716 flow [2024-11-22 21:42:39,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-22 21:42:39,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-22 21:42:39,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 486 transitions. [2024-11-22 21:42:39,266 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2024-11-22 21:42:39,266 INFO L175 Difference]: Start difference. First operand has 132 places, 79 transitions, 566 flow. Second operand 13 states and 486 transitions. [2024-11-22 21:42:39,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 193 transitions, 1716 flow [2024-11-22 21:42:39,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 193 transitions, 1668 flow, removed 4 selfloop flow, removed 14 redundant places. [2024-11-22 21:42:39,365 INFO L231 Difference]: Finished difference. Result has 133 places, 81 transitions, 600 flow [2024-11-22 21:42:39,365 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=600, PETRI_PLACES=133, PETRI_TRANSITIONS=81} [2024-11-22 21:42:39,365 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 73 predicate places. [2024-11-22 21:42:39,366 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 81 transitions, 600 flow [2024-11-22 21:42:39,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 30.15625) internal successors, (965), 32 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:39,366 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:39,366 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:39,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-22 21:42:39,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:39,675 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:39,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:39,675 INFO L85 PathProgramCache]: Analyzing trace with hash 570749139, now seen corresponding path program 2 times [2024-11-22 21:42:39,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:39,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875176126] [2024-11-22 21:42:39,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:42:39,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:39,703 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:42:39,703 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:42:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-11-22 21:42:40,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:40,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875176126] [2024-11-22 21:42:40,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875176126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:40,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090173511] [2024-11-22 21:42:40,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:42:40,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:40,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:40,135 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:40,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-22 21:42:40,272 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:42:40,273 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:42:40,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-22 21:42:40,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:40,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:40,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:40,340 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-22 21:42:40,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-22 21:42:40,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:42:40,469 INFO L349 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2024-11-22 21:42:40,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2024-11-22 21:42:40,478 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:42:40,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:42:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 55 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-22 21:42:41,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:41,470 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 10 treesize of output 8 [2024-11-22 21:42:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:42:41,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090173511] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:41,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:41,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 13] total 40 [2024-11-22 21:42:41,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807208588] [2024-11-22 21:42:41,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:41,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-22 21:42:41,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:41,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-22 21:42:41,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2024-11-22 21:42:43,430 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-11-22 21:42:43,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 81 transitions, 600 flow. Second operand has 42 states, 42 states have (on average 22.452380952380953) internal successors, (943), 42 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:43,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:43,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-11-22 21:42:43,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:50,408 INFO L124 PetriNetUnfolderBase]: 30541/46752 cut-off events. [2024-11-22 21:42:50,409 INFO L125 PetriNetUnfolderBase]: For 185883/188763 co-relation queries the response was YES. [2024-11-22 21:42:50,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182590 conditions, 46752 events. 30541/46752 cut-off events. For 185883/188763 co-relation queries the response was YES. Maximal size of possible extension queue 1160. Compared 344127 event pairs, 2145 based on Foata normal form. 900/44655 useless extension candidates. Maximal degree in co-relation 182480. Up to 7038 conditions per place. [2024-11-22 21:42:50,814 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 250 selfloop transitions, 27 changer transitions 0/288 dead transitions. [2024-11-22 21:42:50,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 288 transitions, 2575 flow [2024-11-22 21:42:50,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-22 21:42:50,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-22 21:42:50,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 627 transitions. [2024-11-22 21:42:50,819 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-11-22 21:42:50,819 INFO L175 Difference]: Start difference. First operand has 133 places, 81 transitions, 600 flow. Second operand 22 states and 627 transitions. [2024-11-22 21:42:50,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 288 transitions, 2575 flow [2024-11-22 21:42:51,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 288 transitions, 2472 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-11-22 21:42:51,106 INFO L231 Difference]: Finished difference. Result has 141 places, 82 transitions, 607 flow [2024-11-22 21:42:51,106 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=607, PETRI_PLACES=141, PETRI_TRANSITIONS=82} [2024-11-22 21:42:51,107 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 81 predicate places. [2024-11-22 21:42:51,107 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 82 transitions, 607 flow [2024-11-22 21:42:51,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 22.452380952380953) internal successors, (943), 42 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:51,107 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:51,107 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:51,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-22 21:42:51,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:51,311 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:51,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:51,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1358522496, now seen corresponding path program 1 times [2024-11-22 21:42:51,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:51,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117562838] [2024-11-22 21:42:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:42:51,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:42:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-22 21:42:51,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:51,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117562838] [2024-11-22 21:42:51,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117562838] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:42:51,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:42:51,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:42:51,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432646698] [2024-11-22 21:42:51,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:42:51,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:42:51,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:51,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:42:51,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:42:51,406 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-11-22 21:42:51,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 82 transitions, 607 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:51,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:51,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-11-22 21:42:51,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:42:54,018 INFO L124 PetriNetUnfolderBase]: 12004/19579 cut-off events. [2024-11-22 21:42:54,019 INFO L125 PetriNetUnfolderBase]: For 82211/85394 co-relation queries the response was YES. [2024-11-22 21:42:54,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74598 conditions, 19579 events. 12004/19579 cut-off events. For 82211/85394 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 144562 event pairs, 9122 based on Foata normal form. 30/18226 useless extension candidates. Maximal degree in co-relation 74489. Up to 14921 conditions per place. [2024-11-22 21:42:54,148 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 84 selfloop transitions, 2 changer transitions 1/106 dead transitions. [2024-11-22 21:42:54,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 106 transitions, 948 flow [2024-11-22 21:42:54,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:42:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:42:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2024-11-22 21:42:54,149 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7388888888888889 [2024-11-22 21:42:54,149 INFO L175 Difference]: Start difference. First operand has 141 places, 82 transitions, 607 flow. Second operand 3 states and 133 transitions. [2024-11-22 21:42:54,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 106 transitions, 948 flow [2024-11-22 21:42:54,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 106 transitions, 901 flow, removed 0 selfloop flow, removed 18 redundant places. [2024-11-22 21:42:54,315 INFO L231 Difference]: Finished difference. Result has 126 places, 82 transitions, 568 flow [2024-11-22 21:42:54,316 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=568, PETRI_PLACES=126, PETRI_TRANSITIONS=82} [2024-11-22 21:42:54,316 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 66 predicate places. [2024-11-22 21:42:54,316 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 82 transitions, 568 flow [2024-11-22 21:42:54,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:54,316 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:42:54,316 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:42:54,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-22 21:42:54,316 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:42:54,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:42:54,317 INFO L85 PathProgramCache]: Analyzing trace with hash 513354971, now seen corresponding path program 2 times [2024-11-22 21:42:54,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:42:54,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322302003] [2024-11-22 21:42:54,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:42:54,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:42:54,332 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:42:54,332 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:42:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2024-11-22 21:42:54,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:42:54,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322302003] [2024-11-22 21:42:54,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322302003] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:42:54,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629869222] [2024-11-22 21:42:54,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:42:54,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:42:54,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:42:54,475 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:42:54,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-22 21:42:54,597 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:42:54,598 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:42:54,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-22 21:42:54,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:42:54,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:54,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:42:54,707 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-22 21:42:54,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-22 21:42:54,733 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-22 21:42:54,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-22 21:42:54,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:42:54,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:42:54,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2024-11-22 21:42:54,973 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-22 21:42:54,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-22 21:42:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-22 21:42:55,367 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:42:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-22 21:42:56,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629869222] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:42:56,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:42:56,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-22 21:42:56,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559721868] [2024-11-22 21:42:56,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:42:56,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:42:56,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:42:56,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:42:56,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:42:57,483 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-22 21:42:57,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 82 transitions, 568 flow. Second operand has 14 states, 14 states have (on average 24.642857142857142) internal successors, (345), 14 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:42:57,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:42:57,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-22 21:42:57,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:01,312 INFO L124 PetriNetUnfolderBase]: 21136/31031 cut-off events. [2024-11-22 21:43:01,313 INFO L125 PetriNetUnfolderBase]: For 112512/115766 co-relation queries the response was YES. [2024-11-22 21:43:01,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121084 conditions, 31031 events. 21136/31031 cut-off events. For 112512/115766 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 209823 event pairs, 9122 based on Foata normal form. 620/31048 useless extension candidates. Maximal degree in co-relation 120983. Up to 14878 conditions per place. [2024-11-22 21:43:01,581 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 96 selfloop transitions, 16 changer transitions 1/126 dead transitions. [2024-11-22 21:43:01,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 126 transitions, 1111 flow [2024-11-22 21:43:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:43:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:43:01,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-11-22 21:43:01,583 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-11-22 21:43:01,583 INFO L175 Difference]: Start difference. First operand has 126 places, 82 transitions, 568 flow. Second operand 8 states and 228 transitions. [2024-11-22 21:43:01,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 126 transitions, 1111 flow [2024-11-22 21:43:01,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 126 transitions, 1091 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-22 21:43:01,711 INFO L231 Difference]: Finished difference. Result has 127 places, 82 transitions, 586 flow [2024-11-22 21:43:01,711 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=586, PETRI_PLACES=127, PETRI_TRANSITIONS=82} [2024-11-22 21:43:01,712 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 67 predicate places. [2024-11-22 21:43:01,712 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 82 transitions, 586 flow [2024-11-22 21:43:01,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 24.642857142857142) internal successors, (345), 14 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:43:01,712 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:01,712 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:01,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-22 21:43:01,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:01,916 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:43:01,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:01,917 INFO L85 PathProgramCache]: Analyzing trace with hash -139600374, now seen corresponding path program 2 times [2024-11-22 21:43:01,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:01,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849743947] [2024-11-22 21:43:01,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:43:01,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:01,972 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:43:01,972 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:43:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 32 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-22 21:43:02,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:02,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849743947] [2024-11-22 21:43:02,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849743947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:02,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694444769] [2024-11-22 21:43:02,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:43:02,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:02,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:02,675 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:43:02,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-22 21:43:02,831 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:43:02,831 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:43:02,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-22 21:43:02,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:02,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:43:02,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:43:02,891 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:43:02,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-22 21:43:02,905 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:43:02,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:43:03,108 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-22 21:43:03,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 25 [2024-11-22 21:43:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:43:03,654 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:43:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:43:04,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694444769] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:43:04,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:43:04,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 39 [2024-11-22 21:43:04,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636873785] [2024-11-22 21:43:04,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:43:04,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-22 21:43:04,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:04,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-22 21:43:04,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1332, Unknown=0, NotChecked=0, Total=1640 [2024-11-22 21:43:06,104 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 60 [2024-11-22 21:43:06,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 82 transitions, 586 flow. Second operand has 41 states, 41 states have (on average 19.609756097560975) internal successors, (804), 41 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:43:06,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:06,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 60 [2024-11-22 21:43:06,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:14,622 INFO L124 PetriNetUnfolderBase]: 37186/55009 cut-off events. [2024-11-22 21:43:14,623 INFO L125 PetriNetUnfolderBase]: For 231742/233918 co-relation queries the response was YES. [2024-11-22 21:43:15,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212933 conditions, 55009 events. 37186/55009 cut-off events. For 231742/233918 co-relation queries the response was YES. Maximal size of possible extension queue 1286. Compared 391377 event pairs, 822 based on Foata normal form. 1220/52362 useless extension candidates. Maximal degree in co-relation 212832. Up to 8530 conditions per place. [2024-11-22 21:43:15,265 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 247 selfloop transitions, 25 changer transitions 0/283 dead transitions. [2024-11-22 21:43:15,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 283 transitions, 2614 flow [2024-11-22 21:43:15,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-22 21:43:15,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-22 21:43:15,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 510 transitions. [2024-11-22 21:43:15,266 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-11-22 21:43:15,266 INFO L175 Difference]: Start difference. First operand has 127 places, 82 transitions, 586 flow. Second operand 20 states and 510 transitions. [2024-11-22 21:43:15,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 283 transitions, 2614 flow [2024-11-22 21:43:15,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 283 transitions, 2440 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-11-22 21:43:15,787 INFO L231 Difference]: Finished difference. Result has 136 places, 83 transitions, 598 flow [2024-11-22 21:43:15,787 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=598, PETRI_PLACES=136, PETRI_TRANSITIONS=83} [2024-11-22 21:43:15,788 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 76 predicate places. [2024-11-22 21:43:15,788 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 83 transitions, 598 flow [2024-11-22 21:43:15,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 19.609756097560975) internal successors, (804), 41 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:43:15,788 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:15,788 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:15,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-22 21:43:15,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:15,993 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-22 21:43:15,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:15,993 INFO L85 PathProgramCache]: Analyzing trace with hash -32643443, now seen corresponding path program 2 times [2024-11-22 21:43:15,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:15,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098980115] [2024-11-22 21:43:15,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:43:15,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:16,010 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:43:16,010 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:43:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2024-11-22 21:43:16,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:16,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098980115] [2024-11-22 21:43:16,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098980115] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:16,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378121495] [2024-11-22 21:43:16,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:43:16,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:16,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:16,212 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:43:16,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-22 21:43:16,330 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:43:16,330 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:43:16,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-22 21:43:16,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:16,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:43:16,373 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-22 21:43:16,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-22 21:43:16,439 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2024-11-22 21:43:16,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 22 [2024-11-22 21:43:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-22 21:43:16,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:43:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-22 21:43:17,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378121495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:43:17,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:43:17,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-22 21:43:17,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485157242] [2024-11-22 21:43:17,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:43:17,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:43:17,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:17,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:43:17,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:43:18,241 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-22 21:43:18,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 83 transitions, 598 flow. Second operand has 18 states, 18 states have (on average 29.22222222222222) internal successors, (526), 18 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:43:18,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:18,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-22 21:43:18,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand