./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c031a4ce44fce05276ee0c322906dbff86776176e55e116d257d2b83e85a253c --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:53:12,059 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:53:12,122 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:53:12,127 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:53:12,127 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:53:12,151 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:53:12,151 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:53:12,151 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:53:12,152 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:53:12,152 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:53:12,152 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:53:12,153 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:53:12,153 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:53:12,155 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:53:12,155 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:53:12,155 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:53:12,156 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:53:12,156 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:53:12,156 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:53:12,156 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:53:12,156 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:53:12,157 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:53:12,159 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:53:12,160 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:53:12,160 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:53:12,160 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:53:12,160 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:53:12,160 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:53:12,161 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:53:12,161 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:53:12,161 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:53:12,161 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:53:12,161 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:53:12,161 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:53:12,161 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:53:12,162 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:53:12,162 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:53:12,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:53:12,162 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:53:12,162 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:53:12,162 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:53:12,163 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:53:12,163 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c031a4ce44fce05276ee0c322906dbff86776176e55e116d257d2b83e85a253c [2024-11-09 10:53:12,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:53:12,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:53:12,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:53:12,405 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:53:12,405 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:53:12,406 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c [2024-11-09 10:53:13,734 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:53:13,949 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:53:13,951 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c [2024-11-09 10:53:13,961 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da79cfc67/f6900c5567234e1e935318a0c12669a0/FLAGd8966e4c4 [2024-11-09 10:53:14,324 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da79cfc67/f6900c5567234e1e935318a0c12669a0 [2024-11-09 10:53:14,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:53:14,328 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:53:14,329 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:53:14,329 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:53:14,334 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:53:14,335 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:53:14" (1/1) ... [2024-11-09 10:53:14,335 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@370843fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:14, skipping insertion in model container [2024-11-09 10:53:14,336 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:53:14" (1/1) ... [2024-11-09 10:53:14,359 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:53:14,566 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:53:14,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:53:14,586 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:53:14,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:53:14,640 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:53:14,641 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:14 WrapperNode [2024-11-09 10:53:14,641 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:53:14,642 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:53:14,642 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:53:14,642 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:53:14,649 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:14" (1/1) ... [2024-11-09 10:53:14,659 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:14" (1/1) ... [2024-11-09 10:53:14,689 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 342 [2024-11-09 10:53:14,689 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:53:14,690 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:53:14,690 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:53:14,690 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:53:14,706 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:14" (1/1) ... [2024-11-09 10:53:14,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:14" (1/1) ... [2024-11-09 10:53:14,719 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:14" (1/1) ... [2024-11-09 10:53:14,734 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-09 10:53:14,735 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:14" (1/1) ... [2024-11-09 10:53:14,735 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:14" (1/1) ... [2024-11-09 10:53:14,745 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:14" (1/1) ... [2024-11-09 10:53:14,749 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:14" (1/1) ... [2024-11-09 10:53:14,755 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:14" (1/1) ... [2024-11-09 10:53:14,756 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:14" (1/1) ... [2024-11-09 10:53:14,764 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:53:14,765 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:53:14,768 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:53:14,768 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:53:14,769 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:14" (1/1) ... [2024-11-09 10:53:14,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:53:14,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:14,806 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 10:53:14,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 10:53:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:53:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:53:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:53:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:53:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:53:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:53:14,854 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:53:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:53:14,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:53:14,855 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 10:53:14,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 10:53:14,876 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-09 10:53:14,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-09 10:53:14,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:53:14,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:53:14,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 10:53:14,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 10:53:14,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:53:14,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:53:14,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:53:14,879 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:53:15,038 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:53:15,039 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:53:15,483 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:53:15,483 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:53:15,858 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:53:15,858 INFO L316 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-09 10:53:15,859 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:53:15 BoogieIcfgContainer [2024-11-09 10:53:15,859 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:53:15,861 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:53:15,862 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:53:15,865 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:53:15,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:53:14" (1/3) ... [2024-11-09 10:53:15,866 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0331dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:53:15, skipping insertion in model container [2024-11-09 10:53:15,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:53:14" (2/3) ... [2024-11-09 10:53:15,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0331dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:53:15, skipping insertion in model container [2024-11-09 10:53:15,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:53:15" (3/3) ... [2024-11-09 10:53:15,868 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series3.wvr.c [2024-11-09 10:53:15,886 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:53:15,887 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-09 10:53:15,887 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:53:15,966 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-09 10:53:16,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 77 transitions, 182 flow [2024-11-09 10:53:16,050 INFO L124 PetriNetUnfolderBase]: 7/73 cut-off events. [2024-11-09 10:53:16,051 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-09 10:53:16,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 73 events. 7/73 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 190 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2024-11-09 10:53:16,057 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 77 transitions, 182 flow [2024-11-09 10:53:16,062 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 72 transitions, 168 flow [2024-11-09 10:53:16,073 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:53:16,082 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;@2a95245c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:53:16,082 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-09 10:53:16,087 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:53:16,087 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:53:16,088 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:53:16,088 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:16,089 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:53:16,090 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:53:16,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:16,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1037210, now seen corresponding path program 1 times [2024-11-09 10:53:16,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:16,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874146756] [2024-11-09 10:53:16,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:16,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:16,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:16,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874146756] [2024-11-09 10:53:16,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874146756] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:16,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:16,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:53:16,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334473414] [2024-11-09 10:53:16,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:16,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:53:16,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:16,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:53:16,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:53:16,546 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-09 10:53:16,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:16,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:16,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-09 10:53:16,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:19,099 INFO L124 PetriNetUnfolderBase]: 17936/23922 cut-off events. [2024-11-09 10:53:19,099 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2024-11-09 10:53:19,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46767 conditions, 23922 events. 17936/23922 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154876 event pairs, 11530 based on Foata normal form. 1/11174 useless extension candidates. Maximal degree in co-relation 44660. Up to 21814 conditions per place. [2024-11-09 10:53:19,293 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 43 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2024-11-09 10:53:19,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 244 flow [2024-11-09 10:53:19,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:53:19,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:53:19,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2024-11-09 10:53:19,303 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-11-09 10:53:19,304 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 168 flow. Second operand 3 states and 126 transitions. [2024-11-09 10:53:19,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 244 flow [2024-11-09 10:53:19,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 65 transitions, 228 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-09 10:53:19,388 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 142 flow [2024-11-09 10:53:19,390 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2024-11-09 10:53:19,395 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -13 predicate places. [2024-11-09 10:53:19,395 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 142 flow [2024-11-09 10:53:19,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:19,396 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:19,396 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:53:19,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:53:19,396 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:53:19,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:19,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1037211, now seen corresponding path program 1 times [2024-11-09 10:53:19,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:19,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295005635] [2024-11-09 10:53:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:19,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:19,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:19,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295005635] [2024-11-09 10:53:19,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295005635] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:19,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:19,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:53:19,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962387090] [2024-11-09 10:53:19,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:19,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:53:19,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:19,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:53:19,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:53:19,652 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-09 10:53:19,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:19,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:19,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-09 10:53:19,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:22,338 INFO L124 PetriNetUnfolderBase]: 17937/23925 cut-off events. [2024-11-09 10:53:22,338 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:53:22,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46151 conditions, 23925 events. 17937/23925 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154693 event pairs, 11530 based on Foata normal form. 0/11173 useless extension candidates. Maximal degree in co-relation 46114. Up to 21827 conditions per place. [2024-11-09 10:53:22,457 INFO L140 encePairwiseOnDemand]: 72/77 looper letters, 47 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2024-11-09 10:53:22,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 250 flow [2024-11-09 10:53:22,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:53:22,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:53:22,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-09 10:53:22,459 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2024-11-09 10:53:22,459 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 142 flow. Second operand 4 states and 152 transitions. [2024-11-09 10:53:22,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 250 flow [2024-11-09 10:53:22,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:53:22,461 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 165 flow [2024-11-09 10:53:22,462 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-11-09 10:53:22,462 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -10 predicate places. [2024-11-09 10:53:22,462 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 165 flow [2024-11-09 10:53:22,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:22,463 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:22,463 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-09 10:53:22,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:53:22,463 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:53:22,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:22,464 INFO L85 PathProgramCache]: Analyzing trace with hash 32156855, now seen corresponding path program 1 times [2024-11-09 10:53:22,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:22,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275830829] [2024-11-09 10:53:22,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:22,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:22,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:22,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:22,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275830829] [2024-11-09 10:53:22,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275830829] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:22,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:22,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:53:22,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712652457] [2024-11-09 10:53:22,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:22,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:53:22,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:22,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:53:22,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:53:22,688 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-09 10:53:22,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:22,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:22,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-09 10:53:22,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:24,907 INFO L124 PetriNetUnfolderBase]: 17938/23928 cut-off events. [2024-11-09 10:53:24,908 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:53:24,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46168 conditions, 23928 events. 17938/23928 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154804 event pairs, 11530 based on Foata normal form. 0/11175 useless extension candidates. Maximal degree in co-relation 46143. Up to 21826 conditions per place. [2024-11-09 10:53:25,020 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 47 selfloop transitions, 7 changer transitions 0/71 dead transitions. [2024-11-09 10:53:25,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 279 flow [2024-11-09 10:53:25,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:53:25,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:53:25,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-11-09 10:53:25,023 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-11-09 10:53:25,023 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 165 flow. Second operand 5 states and 180 transitions. [2024-11-09 10:53:25,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 279 flow [2024-11-09 10:53:25,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:53:25,025 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 199 flow [2024-11-09 10:53:25,025 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-11-09 10:53:25,025 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -5 predicate places. [2024-11-09 10:53:25,026 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 199 flow [2024-11-09 10:53:25,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:25,026 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:25,026 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 10:53:25,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:53:25,026 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:53:25,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:25,027 INFO L85 PathProgramCache]: Analyzing trace with hash 996865588, now seen corresponding path program 1 times [2024-11-09 10:53:25,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:25,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347558580] [2024-11-09 10:53:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:25,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:25,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:25,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347558580] [2024-11-09 10:53:25,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347558580] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:25,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:25,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:53:25,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617278833] [2024-11-09 10:53:25,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:25,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:53:25,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:25,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:53:25,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:53:25,235 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-09 10:53:25,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:25,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:25,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-09 10:53:25,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:27,359 INFO L124 PetriNetUnfolderBase]: 17939/23931 cut-off events. [2024-11-09 10:53:27,360 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:53:27,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46190 conditions, 23931 events. 17939/23931 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 155066 event pairs, 11530 based on Foata normal form. 0/11179 useless extension candidates. Maximal degree in co-relation 46159. Up to 21829 conditions per place. [2024-11-09 10:53:27,530 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 48 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2024-11-09 10:53:27,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 74 transitions, 319 flow [2024-11-09 10:53:27,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:53:27,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:53:27,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-11-09 10:53:27,535 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-11-09 10:53:27,535 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 199 flow. Second operand 5 states and 180 transitions. [2024-11-09 10:53:27,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 74 transitions, 319 flow [2024-11-09 10:53:27,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:53:27,537 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 241 flow [2024-11-09 10:53:27,540 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2024-11-09 10:53:27,541 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2024-11-09 10:53:27,541 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 241 flow [2024-11-09 10:53:27,542 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) [2024-11-09 10:53:27,542 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:27,542 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:53:27,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:53:27,542 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:53:27,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:27,542 INFO L85 PathProgramCache]: Analyzing trace with hash 996793698, now seen corresponding path program 1 times [2024-11-09 10:53:27,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:27,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318637824] [2024-11-09 10:53:27,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:27,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:27,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:27,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318637824] [2024-11-09 10:53:27,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318637824] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:27,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747275921] [2024-11-09 10:53:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:27,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:27,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:27,706 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:27,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:53:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:27,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 10:53:27,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:27,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:53:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:27,968 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:28,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747275921] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:28,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:28,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:53:28,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962959262] [2024-11-09 10:53:28,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:28,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:53:28,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:28,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:53:28,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:53:28,149 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-09 10:53:28,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 241 flow. Second operand has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:28,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:28,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-09 10:53:28,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:30,164 INFO L124 PetriNetUnfolderBase]: 17939/23930 cut-off events. [2024-11-09 10:53:30,164 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-09 10:53:30,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46208 conditions, 23930 events. 17939/23930 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 155028 event pairs, 11530 based on Foata normal form. 0/11181 useless extension candidates. Maximal degree in co-relation 46174. Up to 21829 conditions per place. [2024-11-09 10:53:30,295 INFO L140 encePairwiseOnDemand]: 72/77 looper letters, 49 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2024-11-09 10:53:30,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 73 transitions, 349 flow [2024-11-09 10:53:30,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:53:30,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:53:30,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2024-11-09 10:53:30,301 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-11-09 10:53:30,301 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 241 flow. Second operand 6 states and 201 transitions. [2024-11-09 10:53:30,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 73 transitions, 349 flow [2024-11-09 10:53:30,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 73 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:53:30,304 INFO L231 Difference]: Finished difference. Result has 80 places, 73 transitions, 244 flow [2024-11-09 10:53:30,304 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=80, PETRI_TRANSITIONS=73} [2024-11-09 10:53:30,304 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2024-11-09 10:53:30,305 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 73 transitions, 244 flow [2024-11-09 10:53:30,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:30,305 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:30,305 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-09 10:53:30,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:53:30,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:30,507 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:53:30,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:30,508 INFO L85 PathProgramCache]: Analyzing trace with hash 838001052, now seen corresponding path program 1 times [2024-11-09 10:53:30,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:30,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991933033] [2024-11-09 10:53:30,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:30,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:30,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:30,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991933033] [2024-11-09 10:53:30,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991933033] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:30,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266856193] [2024-11-09 10:53:30,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:30,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:30,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:30,640 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:30,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:53:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:30,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:53:30,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:30,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 10:53:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:30,836 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:30,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266856193] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:30,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:30,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:53:30,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042203018] [2024-11-09 10:53:30,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:30,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:53:30,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:30,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:53:30,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:53:31,048 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-09 10:53:31,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 73 transitions, 244 flow. Second operand has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:31,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:31,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-09 10:53:31,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:33,220 INFO L124 PetriNetUnfolderBase]: 17939/23929 cut-off events. [2024-11-09 10:53:33,220 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-09 10:53:33,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46208 conditions, 23929 events. 17939/23929 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154949 event pairs, 11530 based on Foata normal form. 0/11181 useless extension candidates. Maximal degree in co-relation 46170. Up to 21821 conditions per place. [2024-11-09 10:53:33,348 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 43 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-11-09 10:53:33,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 72 transitions, 350 flow [2024-11-09 10:53:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:53:33,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:53:33,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-11-09 10:53:33,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4230055658627087 [2024-11-09 10:53:33,351 INFO L175 Difference]: Start difference. First operand has 80 places, 73 transitions, 244 flow. Second operand 7 states and 228 transitions. [2024-11-09 10:53:33,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 72 transitions, 350 flow [2024-11-09 10:53:33,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 316 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-09 10:53:33,353 INFO L231 Difference]: Finished difference. Result has 77 places, 72 transitions, 230 flow [2024-11-09 10:53:33,353 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=230, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2024-11-09 10:53:33,353 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2024-11-09 10:53:33,353 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 230 flow [2024-11-09 10:53:33,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:33,354 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:33,354 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-09 10:53:33,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:53:33,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 10:53:33,556 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:53:33,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:33,556 INFO L85 PathProgramCache]: Analyzing trace with hash 210156802, now seen corresponding path program 1 times [2024-11-09 10:53:33,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:33,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746698417] [2024-11-09 10:53:33,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:33,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:33,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:33,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746698417] [2024-11-09 10:53:33,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746698417] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:33,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182633761] [2024-11-09 10:53:33,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:33,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:33,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:33,821 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:33,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:53:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:33,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:53:33,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:33,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 10:53:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:34,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:53:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:34,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182633761] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:53:34,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:53:34,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:53:34,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772400800] [2024-11-09 10:53:34,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:53:34,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:53:34,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:34,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:53:34,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:53:34,378 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-09 10:53:34,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 72 transitions, 230 flow. Second operand has 13 states, 13 states have (on average 26.46153846153846) internal successors, (344), 13 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:34,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:34,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-09 10:53:34,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:36,519 INFO L124 PetriNetUnfolderBase]: 17941/23934 cut-off events. [2024-11-09 10:53:36,520 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-09 10:53:36,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46216 conditions, 23934 events. 17941/23934 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154944 event pairs, 11530 based on Foata normal form. 0/11186 useless extension candidates. Maximal degree in co-relation 46155. Up to 21822 conditions per place. [2024-11-09 10:53:36,720 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 39 selfloop transitions, 21 changer transitions 0/77 dead transitions. [2024-11-09 10:53:36,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 372 flow [2024-11-09 10:53:36,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:53:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:53:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 284 transitions. [2024-11-09 10:53:36,722 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4098124098124098 [2024-11-09 10:53:36,722 INFO L175 Difference]: Start difference. First operand has 77 places, 72 transitions, 230 flow. Second operand 9 states and 284 transitions. [2024-11-09 10:53:36,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 372 flow [2024-11-09 10:53:36,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 77 transitions, 345 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-09 10:53:36,725 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 267 flow [2024-11-09 10:53:36,725 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=267, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2024-11-09 10:53:36,726 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2024-11-09 10:53:36,726 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 267 flow [2024-11-09 10:53:36,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.46153846153846) internal successors, (344), 13 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:36,727 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:36,727 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:36,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:53:36,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:36,929 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:53:36,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:36,929 INFO L85 PathProgramCache]: Analyzing trace with hash 182116694, now seen corresponding path program 1 times [2024-11-09 10:53:36,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:36,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672994742] [2024-11-09 10:53:36,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:36,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:36,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:36,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672994742] [2024-11-09 10:53:36,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672994742] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:36,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:36,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:53:36,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179497700] [2024-11-09 10:53:36,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:36,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:53:36,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:36,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:53:36,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:53:36,999 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2024-11-09 10:53:36,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 77 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:36,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:36,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2024-11-09 10:53:36,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:39,125 INFO L124 PetriNetUnfolderBase]: 19389/26036 cut-off events. [2024-11-09 10:53:39,125 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:53:39,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50350 conditions, 26036 events. 19389/26036 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2045. Compared 171147 event pairs, 12584 based on Foata normal form. 396/13261 useless extension candidates. Maximal degree in co-relation 46094. Up to 21835 conditions per place. [2024-11-09 10:53:39,279 INFO L140 encePairwiseOnDemand]: 62/77 looper letters, 94 selfloop transitions, 7 changer transitions 0/118 dead transitions. [2024-11-09 10:53:39,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 118 transitions, 617 flow [2024-11-09 10:53:39,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:53:39,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:53:39,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2024-11-09 10:53:39,281 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6077922077922078 [2024-11-09 10:53:39,281 INFO L175 Difference]: Start difference. First operand has 79 places, 77 transitions, 267 flow. Second operand 5 states and 234 transitions. [2024-11-09 10:53:39,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 118 transitions, 617 flow [2024-11-09 10:53:39,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 118 transitions, 545 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-09 10:53:39,283 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 287 flow [2024-11-09 10:53:39,283 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=287, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-11-09 10:53:39,284 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2024-11-09 10:53:39,284 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 287 flow [2024-11-09 10:53:39,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:39,284 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:39,284 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:39,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:53:39,284 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:53:39,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:39,285 INFO L85 PathProgramCache]: Analyzing trace with hash 297941469, now seen corresponding path program 1 times [2024-11-09 10:53:39,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:39,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589132542] [2024-11-09 10:53:39,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:39,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:53:39,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:39,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589132542] [2024-11-09 10:53:39,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589132542] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:39,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:39,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 10:53:39,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428352205] [2024-11-09 10:53:39,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:39,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:53:39,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:39,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:53:39,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 10:53:39,429 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-09 10:53:39,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 287 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:39,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:39,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-09 10:53:39,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:44,673 INFO L124 PetriNetUnfolderBase]: 44955/59344 cut-off events. [2024-11-09 10:53:44,674 INFO L125 PetriNetUnfolderBase]: For 2430/3501 co-relation queries the response was YES. [2024-11-09 10:53:44,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129498 conditions, 59344 events. 44955/59344 cut-off events. For 2430/3501 co-relation queries the response was YES. Maximal size of possible extension queue 4076. Compared 406479 event pairs, 15346 based on Foata normal form. 0/31024 useless extension candidates. Maximal degree in co-relation 114901. Up to 18947 conditions per place. [2024-11-09 10:53:45,138 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 185 selfloop transitions, 12 changer transitions 0/211 dead transitions. [2024-11-09 10:53:45,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 211 transitions, 1005 flow [2024-11-09 10:53:45,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:53:45,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:53:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 382 transitions. [2024-11-09 10:53:45,140 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6201298701298701 [2024-11-09 10:53:45,140 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 287 flow. Second operand 8 states and 382 transitions. [2024-11-09 10:53:45,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 211 transitions, 1005 flow [2024-11-09 10:53:45,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 211 transitions, 1000 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:53:45,150 INFO L231 Difference]: Finished difference. Result has 87 places, 85 transitions, 336 flow [2024-11-09 10:53:45,150 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=87, PETRI_TRANSITIONS=85} [2024-11-09 10:53:45,151 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 9 predicate places. [2024-11-09 10:53:45,151 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 85 transitions, 336 flow [2024-11-09 10:53:45,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:45,151 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:45,151 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:45,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 10:53:45,152 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:53:45,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:45,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2138009062, now seen corresponding path program 1 times [2024-11-09 10:53:45,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:45,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280136731] [2024-11-09 10:53:45,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:45,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:45,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:45,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280136731] [2024-11-09 10:53:45,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280136731] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:45,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:45,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:53:45,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252633026] [2024-11-09 10:53:45,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:45,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:53:45,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:45,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:53:45,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:53:45,225 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2024-11-09 10:53:45,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 85 transitions, 336 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:45,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:45,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2024-11-09 10:53:45,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:48,692 INFO L124 PetriNetUnfolderBase]: 34382/48658 cut-off events. [2024-11-09 10:53:48,693 INFO L125 PetriNetUnfolderBase]: For 7964/7964 co-relation queries the response was YES. [2024-11-09 10:53:48,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110438 conditions, 48658 events. 34382/48658 cut-off events. For 7964/7964 co-relation queries the response was YES. Maximal size of possible extension queue 3508. Compared 378901 event pairs, 26681 based on Foata normal form. 772/28233 useless extension candidates. Maximal degree in co-relation 91192. Up to 40663 conditions per place. [2024-11-09 10:53:49,017 INFO L140 encePairwiseOnDemand]: 64/77 looper letters, 97 selfloop transitions, 10 changer transitions 0/125 dead transitions. [2024-11-09 10:53:49,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 125 transitions, 710 flow [2024-11-09 10:53:49,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:53:49,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:53:49,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 228 transitions. [2024-11-09 10:53:49,019 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5922077922077922 [2024-11-09 10:53:49,019 INFO L175 Difference]: Start difference. First operand has 87 places, 85 transitions, 336 flow. Second operand 5 states and 228 transitions. [2024-11-09 10:53:49,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 125 transitions, 710 flow [2024-11-09 10:53:49,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 125 transitions, 710 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 10:53:49,049 INFO L231 Difference]: Finished difference. Result has 93 places, 89 transitions, 427 flow [2024-11-09 10:53:49,050 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=427, PETRI_PLACES=93, PETRI_TRANSITIONS=89} [2024-11-09 10:53:49,050 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 15 predicate places. [2024-11-09 10:53:49,050 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 89 transitions, 427 flow [2024-11-09 10:53:49,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:49,051 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:49,051 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:49,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:53:49,051 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:53:49,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:49,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1609686370, now seen corresponding path program 1 times [2024-11-09 10:53:49,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:49,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785396288] [2024-11-09 10:53:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:49,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:53:49,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:49,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785396288] [2024-11-09 10:53:49,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785396288] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:49,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:49,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:53:49,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744424840] [2024-11-09 10:53:49,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:49,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:53:49,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:49,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:53:49,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:53:49,192 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-09 10:53:49,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 89 transitions, 427 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:49,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:49,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-09 10:53:49,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:52,754 INFO L124 PetriNetUnfolderBase]: 29998/43353 cut-off events. [2024-11-09 10:53:52,754 INFO L125 PetriNetUnfolderBase]: For 10597/10597 co-relation queries the response was YES. [2024-11-09 10:53:52,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110736 conditions, 43353 events. 29998/43353 cut-off events. For 10597/10597 co-relation queries the response was YES. Maximal size of possible extension queue 3095. Compared 345368 event pairs, 23531 based on Foata normal form. 0/25699 useless extension candidates. Maximal degree in co-relation 91159. Up to 38910 conditions per place. [2024-11-09 10:53:53,042 INFO L140 encePairwiseOnDemand]: 73/77 looper letters, 60 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2024-11-09 10:53:53,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 88 transitions, 563 flow [2024-11-09 10:53:53,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:53:53,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:53:53,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-11-09 10:53:53,043 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-11-09 10:53:53,043 INFO L175 Difference]: Start difference. First operand has 93 places, 89 transitions, 427 flow. Second operand 5 states and 170 transitions. [2024-11-09 10:53:53,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 88 transitions, 563 flow [2024-11-09 10:53:53,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 88 transitions, 558 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:53:53,063 INFO L231 Difference]: Finished difference. Result has 95 places, 88 transitions, 438 flow [2024-11-09 10:53:53,063 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=95, PETRI_TRANSITIONS=88} [2024-11-09 10:53:53,064 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 17 predicate places. [2024-11-09 10:53:53,064 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 88 transitions, 438 flow [2024-11-09 10:53:53,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:53,064 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:53,065 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:53,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 10:53:53,065 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:53:53,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:53,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1609686371, now seen corresponding path program 1 times [2024-11-09 10:53:53,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:53,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353381576] [2024-11-09 10:53:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:53,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:53,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:53,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353381576] [2024-11-09 10:53:53,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353381576] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:53:53,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097121453] [2024-11-09 10:53:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:53,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:53,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:53:53,382 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:53:53,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:53:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:53,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 10:53:53,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:53:53,458 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 [2024-11-09 10:53:53,509 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:53:53,510 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 [2024-11-09 10:53:53,516 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 18 treesize of output 13 [2024-11-09 10:53:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:53:53,561 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:53:53,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097121453] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:53,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:53:53,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2024-11-09 10:53:53,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722216886] [2024-11-09 10:53:53,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:53,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:53:53,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:53,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:53:53,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-09 10:53:53,581 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-09 10:53:53,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 438 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:53,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:53,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-09 10:53:53,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:55,992 INFO L124 PetriNetUnfolderBase]: 21559/31997 cut-off events. [2024-11-09 10:53:55,992 INFO L125 PetriNetUnfolderBase]: For 8355/8355 co-relation queries the response was YES. [2024-11-09 10:53:56,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80081 conditions, 31997 events. 21559/31997 cut-off events. For 8355/8355 co-relation queries the response was YES. Maximal size of possible extension queue 2232. Compared 256929 event pairs, 17126 based on Foata normal form. 0/20602 useless extension candidates. Maximal degree in co-relation 63291. Up to 28270 conditions per place. [2024-11-09 10:53:56,251 INFO L140 encePairwiseOnDemand]: 72/77 looper letters, 56 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2024-11-09 10:53:56,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 86 transitions, 566 flow [2024-11-09 10:53:56,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:53:56,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:53:56,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-11-09 10:53:56,253 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43896103896103894 [2024-11-09 10:53:56,253 INFO L175 Difference]: Start difference. First operand has 95 places, 88 transitions, 438 flow. Second operand 5 states and 169 transitions. [2024-11-09 10:53:56,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 86 transitions, 566 flow [2024-11-09 10:53:56,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 86 transitions, 552 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:53:56,269 INFO L231 Difference]: Finished difference. Result has 94 places, 86 transitions, 440 flow [2024-11-09 10:53:56,269 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=440, PETRI_PLACES=94, PETRI_TRANSITIONS=86} [2024-11-09 10:53:56,270 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 16 predicate places. [2024-11-09 10:53:56,270 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 86 transitions, 440 flow [2024-11-09 10:53:56,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:56,271 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:56,271 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:56,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 10:53:56,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:53:56,471 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:53:56,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:56,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1609686368, now seen corresponding path program 1 times [2024-11-09 10:53:56,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:56,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492015594] [2024-11-09 10:53:56,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:56,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:53:56,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:56,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492015594] [2024-11-09 10:53:56,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492015594] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:56,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:56,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:53:56,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319038067] [2024-11-09 10:53:56,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:56,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:53:56,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:56,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:53:56,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:53:56,601 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-09 10:53:56,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 86 transitions, 440 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:56,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:56,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-09 10:53:56,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:53:58,561 INFO L124 PetriNetUnfolderBase]: 15872/24192 cut-off events. [2024-11-09 10:53:58,561 INFO L125 PetriNetUnfolderBase]: For 7079/7079 co-relation queries the response was YES. [2024-11-09 10:53:58,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59535 conditions, 24192 events. 15872/24192 cut-off events. For 7079/7079 co-relation queries the response was YES. Maximal size of possible extension queue 1666. Compared 195601 event pairs, 12811 based on Foata normal form. 0/17020 useless extension candidates. Maximal degree in co-relation 45075. Up to 21072 conditions per place. [2024-11-09 10:53:58,733 INFO L140 encePairwiseOnDemand]: 73/77 looper letters, 59 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2024-11-09 10:53:58,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 84 transitions, 564 flow [2024-11-09 10:53:58,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:53:58,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:53:58,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 142 transitions. [2024-11-09 10:53:58,735 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-11-09 10:53:58,735 INFO L175 Difference]: Start difference. First operand has 94 places, 86 transitions, 440 flow. Second operand 4 states and 142 transitions. [2024-11-09 10:53:58,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 84 transitions, 564 flow [2024-11-09 10:53:58,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 84 transitions, 546 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:53:58,759 INFO L231 Difference]: Finished difference. Result has 92 places, 84 transitions, 428 flow [2024-11-09 10:53:58,759 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=428, PETRI_PLACES=92, PETRI_TRANSITIONS=84} [2024-11-09 10:53:58,760 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 14 predicate places. [2024-11-09 10:53:58,761 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 84 transitions, 428 flow [2024-11-09 10:53:58,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:58,762 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:53:58,762 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:53:58,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 10:53:58,762 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-09 10:53:58,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:53:58,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1609686369, now seen corresponding path program 1 times [2024-11-09 10:53:58,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:53:58,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643738918] [2024-11-09 10:53:58,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:53:58,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:53:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:53:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:53:59,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:53:59,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643738918] [2024-11-09 10:53:59,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643738918] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:53:59,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:53:59,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 10:53:59,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611110876] [2024-11-09 10:53:59,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:53:59,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:53:59,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:53:59,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:53:59,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 10:53:59,084 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-09 10:53:59,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 84 transitions, 428 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:53:59,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:53:59,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-09 10:53:59,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand