./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread/queue_ok.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread/queue_ok.i -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 7cc273f13a619f37768d5108c297b75ab7c37145fe391daced9c134730721251 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:19:06,269 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:19:06,339 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:19:06,343 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:19:06,344 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:19:06,381 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:19:06,382 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:19:06,382 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:19:06,383 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:19:06,383 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:19:06,384 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:19:06,384 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:19:06,385 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:19:06,385 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:19:06,385 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:19:06,386 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:19:06,386 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:19:06,386 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:19:06,387 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:19:06,387 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:19:06,388 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:19:06,391 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:19:06,392 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:19:06,392 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:19:06,392 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:19:06,392 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:19:06,393 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:19:06,393 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:19:06,393 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:19:06,394 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:19:06,394 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:19:06,394 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:19:06,394 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:19:06,395 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:19:06,395 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:19:06,399 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:19:06,399 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:19:06,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:19:06,399 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:19:06,400 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:19:06,400 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:19:06,401 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:19:06,401 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cc273f13a619f37768d5108c297b75ab7c37145fe391daced9c134730721251 [2024-11-19 09:19:06,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:19:06,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:19:06,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:19:06,684 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:19:06,684 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:19:06,686 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/queue_ok.i [2024-11-19 09:19:08,196 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:19:08,451 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:19:08,452 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue_ok.i [2024-11-19 09:19:08,477 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ea4bcab9/a49f7db6fc5448328063c5055a821e59/FLAG741fb46a0 [2024-11-19 09:19:08,762 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ea4bcab9/a49f7db6fc5448328063c5055a821e59 [2024-11-19 09:19:08,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:19:08,765 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:19:08,766 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:19:08,766 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:19:08,771 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:19:08,772 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:19:08" (1/1) ... [2024-11-19 09:19:08,773 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7594e3ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:08, skipping insertion in model container [2024-11-19 09:19:08,773 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:19:08" (1/1) ... [2024-11-19 09:19:08,828 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:19:09,312 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:19:09,331 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:19:09,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:19:09,445 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:19:09,446 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:09 WrapperNode [2024-11-19 09:19:09,446 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:19:09,447 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:19:09,447 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:19:09,447 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:19:09,453 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:09" (1/1) ... [2024-11-19 09:19:09,476 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:09" (1/1) ... [2024-11-19 09:19:09,518 INFO L138 Inliner]: procedures = 274, calls = 94, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 241 [2024-11-19 09:19:09,518 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:19:09,519 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:19:09,519 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:19:09,519 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:19:09,530 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:09" (1/1) ... [2024-11-19 09:19:09,530 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:09" (1/1) ... [2024-11-19 09:19:09,535 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:09" (1/1) ... [2024-11-19 09:19:09,554 INFO L175 MemorySlicer]: Split 75 memory accesses to 4 slices as follows [2, 5, 46, 22]. 61 percent of accesses are in the largest equivalence class. The 50 initializations are split as follows [2, 5, 23, 20]. The 11 writes are split as follows [0, 0, 10, 1]. [2024-11-19 09:19:09,555 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:09" (1/1) ... [2024-11-19 09:19:09,555 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:09" (1/1) ... [2024-11-19 09:19:09,565 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:09" (1/1) ... [2024-11-19 09:19:09,569 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:09" (1/1) ... [2024-11-19 09:19:09,571 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:09" (1/1) ... [2024-11-19 09:19:09,573 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:09" (1/1) ... [2024-11-19 09:19:09,577 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:19:09,578 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:19:09,578 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:19:09,578 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:19:09,579 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:09" (1/1) ... [2024-11-19 09:19:09,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:19:09,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:19:09,617 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 09:19:09,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 09:19:09,671 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-19 09:19:09,672 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-19 09:19:09,672 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-19 09:19:09,672 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-19 09:19:09,672 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-19 09:19:09,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:19:09,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:19:09,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 09:19:09,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-19 09:19:09,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:19:09,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:19:09,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 09:19:09,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-19 09:19:09,673 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-19 09:19:09,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:19:09,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:19:09,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:19:09,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 09:19:09,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-19 09:19:09,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:19:09,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:19:09,675 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:19:09,846 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:19:09,848 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:19:10,412 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:19:10,413 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:19:10,735 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:19:10,736 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-19 09:19:10,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:19:10 BoogieIcfgContainer [2024-11-19 09:19:10,736 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:19:10,738 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:19:10,739 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:19:10,742 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:19:10,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:19:08" (1/3) ... [2024-11-19 09:19:10,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19cc9ca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:19:10, skipping insertion in model container [2024-11-19 09:19:10,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:09" (2/3) ... [2024-11-19 09:19:10,744 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19cc9ca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:19:10, skipping insertion in model container [2024-11-19 09:19:10,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:19:10" (3/3) ... [2024-11-19 09:19:10,746 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok.i [2024-11-19 09:19:10,764 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:19:10,764 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 53 error locations. [2024-11-19 09:19:10,764 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:19:10,938 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 09:19:10,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 129 transitions, 272 flow [2024-11-19 09:19:11,032 INFO L124 PetriNetUnfolderBase]: 11/127 cut-off events. [2024-11-19 09:19:11,033 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:19:11,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 127 events. 11/127 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 405 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 99. Up to 3 conditions per place. [2024-11-19 09:19:11,039 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 129 transitions, 272 flow [2024-11-19 09:19:11,044 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 126 transitions, 264 flow [2024-11-19 09:19:11,059 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:19:11,068 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;@318c2033, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:19:11,069 INFO L334 AbstractCegarLoop]: Starting to check reachability of 96 error locations. [2024-11-19 09:19:11,072 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:19:11,073 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2024-11-19 09:19:11,073 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:19:11,073 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:11,074 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-11-19 09:19:11,074 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:11,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:11,081 INFO L85 PathProgramCache]: Analyzing trace with hash 20809, now seen corresponding path program 1 times [2024-11-19 09:19:11,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:11,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659910026] [2024-11-19 09:19:11,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:11,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:11,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:11,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659910026] [2024-11-19 09:19:11,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659910026] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:11,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:11,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:19:11,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979921474] [2024-11-19 09:19:11,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:11,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:19:11,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:11,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:19:11,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:19:11,630 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 129 [2024-11-19 09:19:11,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 126 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:11,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:11,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 129 [2024-11-19 09:19:11,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:12,141 INFO L124 PetriNetUnfolderBase]: 1089/2984 cut-off events. [2024-11-19 09:19:12,141 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-11-19 09:19:12,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4727 conditions, 2984 events. 1089/2984 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23575 event pairs, 839 based on Foata normal form. 68/2109 useless extension candidates. Maximal degree in co-relation 4570. Up to 1689 conditions per place. [2024-11-19 09:19:12,171 INFO L140 encePairwiseOnDemand]: 121/129 looper letters, 45 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2024-11-19 09:19:12,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 114 transitions, 334 flow [2024-11-19 09:19:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:19:12,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:19:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2024-11-19 09:19:12,186 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6873385012919897 [2024-11-19 09:19:12,189 INFO L175 Difference]: Start difference. First operand has 122 places, 126 transitions, 264 flow. Second operand 3 states and 266 transitions. [2024-11-19 09:19:12,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 114 transitions, 334 flow [2024-11-19 09:19:12,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 114 transitions, 326 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:19:12,197 INFO L231 Difference]: Finished difference. Result has 112 places, 114 transitions, 236 flow [2024-11-19 09:19:12,200 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=112, PETRI_TRANSITIONS=114} [2024-11-19 09:19:12,205 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -10 predicate places. [2024-11-19 09:19:12,205 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 114 transitions, 236 flow [2024-11-19 09:19:12,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:12,206 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:12,206 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-11-19 09:19:12,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:19:12,206 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:12,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:12,207 INFO L85 PathProgramCache]: Analyzing trace with hash 20810, now seen corresponding path program 1 times [2024-11-19 09:19:12,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:12,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411186580] [2024-11-19 09:19:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:12,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:12,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:12,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411186580] [2024-11-19 09:19:12,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411186580] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:12,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:12,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:19:12,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149524013] [2024-11-19 09:19:12,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:12,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:19:12,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:12,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:19:12,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:19:12,477 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 129 [2024-11-19 09:19:12,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 114 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:12,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:12,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 129 [2024-11-19 09:19:12,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:12,806 INFO L124 PetriNetUnfolderBase]: 1089/2981 cut-off events. [2024-11-19 09:19:12,806 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-19 09:19:12,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4690 conditions, 2981 events. 1089/2981 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23571 event pairs, 839 based on Foata normal form. 3/2043 useless extension candidates. Maximal degree in co-relation 4679. Up to 1689 conditions per place. [2024-11-19 09:19:12,828 INFO L140 encePairwiseOnDemand]: 124/129 looper letters, 45 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-11-19 09:19:12,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 111 transitions, 324 flow [2024-11-19 09:19:12,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:19:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:19:12,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2024-11-19 09:19:12,834 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6795865633074936 [2024-11-19 09:19:12,835 INFO L175 Difference]: Start difference. First operand has 112 places, 114 transitions, 236 flow. Second operand 3 states and 263 transitions. [2024-11-19 09:19:12,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 111 transitions, 324 flow [2024-11-19 09:19:12,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 111 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:19:12,839 INFO L231 Difference]: Finished difference. Result has 109 places, 111 transitions, 230 flow [2024-11-19 09:19:12,840 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=109, PETRI_TRANSITIONS=111} [2024-11-19 09:19:12,840 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -13 predicate places. [2024-11-19 09:19:12,841 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 111 transitions, 230 flow [2024-11-19 09:19:12,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:12,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:12,841 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 09:19:12,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:19:12,842 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:12,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:12,844 INFO L85 PathProgramCache]: Analyzing trace with hash 620551874, now seen corresponding path program 1 times [2024-11-19 09:19:12,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:12,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198156324] [2024-11-19 09:19:12,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:12,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:12,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:12,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198156324] [2024-11-19 09:19:12,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198156324] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:12,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:12,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:19:12,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720348064] [2024-11-19 09:19:12,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:12,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:19:12,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:12,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:19:12,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:19:13,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 129 [2024-11-19 09:19:13,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 111 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:13,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:13,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 129 [2024-11-19 09:19:13,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:13,416 INFO L124 PetriNetUnfolderBase]: 1089/2979 cut-off events. [2024-11-19 09:19:13,416 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-19 09:19:13,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4688 conditions, 2979 events. 1089/2979 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23545 event pairs, 839 based on Foata normal form. 1/2041 useless extension candidates. Maximal degree in co-relation 4677. Up to 1688 conditions per place. [2024-11-19 09:19:13,439 INFO L140 encePairwiseOnDemand]: 124/129 looper letters, 44 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2024-11-19 09:19:13,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 109 transitions, 320 flow [2024-11-19 09:19:13,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:19:13,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:19:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2024-11-19 09:19:13,443 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6531007751937985 [2024-11-19 09:19:13,443 INFO L175 Difference]: Start difference. First operand has 109 places, 111 transitions, 230 flow. Second operand 4 states and 337 transitions. [2024-11-19 09:19:13,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 109 transitions, 320 flow [2024-11-19 09:19:13,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 109 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:19:13,447 INFO L231 Difference]: Finished difference. Result has 108 places, 109 transitions, 228 flow [2024-11-19 09:19:13,447 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=108, PETRI_TRANSITIONS=109} [2024-11-19 09:19:13,449 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -14 predicate places. [2024-11-19 09:19:13,450 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 109 transitions, 228 flow [2024-11-19 09:19:13,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:13,451 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:13,451 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 09:19:13,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:19:13,451 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:13,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:13,452 INFO L85 PathProgramCache]: Analyzing trace with hash 620551875, now seen corresponding path program 1 times [2024-11-19 09:19:13,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:13,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971365520] [2024-11-19 09:19:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:13,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:13,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:13,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971365520] [2024-11-19 09:19:13,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971365520] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:13,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:13,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:19:13,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808843234] [2024-11-19 09:19:13,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:13,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:19:13,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:13,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:19:13,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:19:13,799 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 129 [2024-11-19 09:19:13,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 109 transitions, 228 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:13,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:13,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 129 [2024-11-19 09:19:13,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:14,099 INFO L124 PetriNetUnfolderBase]: 1089/2977 cut-off events. [2024-11-19 09:19:14,100 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-19 09:19:14,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4687 conditions, 2977 events. 1089/2977 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23568 event pairs, 839 based on Foata normal form. 2/2041 useless extension candidates. Maximal degree in co-relation 4672. Up to 1688 conditions per place. [2024-11-19 09:19:14,121 INFO L140 encePairwiseOnDemand]: 124/129 looper letters, 44 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2024-11-19 09:19:14,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 107 transitions, 318 flow [2024-11-19 09:19:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:19:14,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:19:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2024-11-19 09:19:14,123 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6531007751937985 [2024-11-19 09:19:14,123 INFO L175 Difference]: Start difference. First operand has 108 places, 109 transitions, 228 flow. Second operand 4 states and 337 transitions. [2024-11-19 09:19:14,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 107 transitions, 318 flow [2024-11-19 09:19:14,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 107 transitions, 312 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:19:14,126 INFO L231 Difference]: Finished difference. Result has 106 places, 107 transitions, 224 flow [2024-11-19 09:19:14,126 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=106, PETRI_TRANSITIONS=107} [2024-11-19 09:19:14,127 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -16 predicate places. [2024-11-19 09:19:14,127 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 107 transitions, 224 flow [2024-11-19 09:19:14,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:14,128 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:14,128 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:19:14,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:19:14,128 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:14,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:14,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1863706484, now seen corresponding path program 1 times [2024-11-19 09:19:14,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:14,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260712924] [2024-11-19 09:19:14,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:14,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:14,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:14,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260712924] [2024-11-19 09:19:14,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260712924] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:14,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:14,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:19:14,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538856077] [2024-11-19 09:19:14,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:14,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:19:14,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:14,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:19:14,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:19:14,330 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 129 [2024-11-19 09:19:14,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 107 transitions, 224 flow. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:14,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:14,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 129 [2024-11-19 09:19:14,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:14,620 INFO L124 PetriNetUnfolderBase]: 1046/2622 cut-off events. [2024-11-19 09:19:14,620 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-19 09:19:14,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4287 conditions, 2622 events. 1046/2622 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 19408 event pairs, 426 based on Foata normal form. 120/2116 useless extension candidates. Maximal degree in co-relation 4272. Up to 882 conditions per place. [2024-11-19 09:19:14,638 INFO L140 encePairwiseOnDemand]: 118/129 looper letters, 67 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2024-11-19 09:19:14,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 122 transitions, 395 flow [2024-11-19 09:19:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:19:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:19:14,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 342 transitions. [2024-11-19 09:19:14,640 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6627906976744186 [2024-11-19 09:19:14,640 INFO L175 Difference]: Start difference. First operand has 106 places, 107 transitions, 224 flow. Second operand 4 states and 342 transitions. [2024-11-19 09:19:14,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 122 transitions, 395 flow [2024-11-19 09:19:14,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 122 transitions, 389 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:19:14,643 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 208 flow [2024-11-19 09:19:14,643 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2024-11-19 09:19:14,644 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -24 predicate places. [2024-11-19 09:19:14,644 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 208 flow [2024-11-19 09:19:14,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:14,644 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:14,644 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:19:14,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:19:14,645 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:14,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:14,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1863706483, now seen corresponding path program 1 times [2024-11-19 09:19:14,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:14,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506109921] [2024-11-19 09:19:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:14,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:14,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:14,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506109921] [2024-11-19 09:19:14,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506109921] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:14,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:14,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:19:14,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967089204] [2024-11-19 09:19:14,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:14,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:19:14,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:14,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:19:14,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:19:15,170 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 129 [2024-11-19 09:19:15,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 69.2) internal successors, (346), 5 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:15,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:15,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 129 [2024-11-19 09:19:15,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:15,509 INFO L124 PetriNetUnfolderBase]: 1046/2354 cut-off events. [2024-11-19 09:19:15,509 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2024-11-19 09:19:15,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4097 conditions, 2354 events. 1046/2354 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 15826 event pairs, 426 based on Foata normal form. 120/2000 useless extension candidates. Maximal degree in co-relation 1953. Up to 881 conditions per place. [2024-11-19 09:19:15,525 INFO L140 encePairwiseOnDemand]: 118/129 looper letters, 66 selfloop transitions, 4 changer transitions 0/115 dead transitions. [2024-11-19 09:19:15,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 115 transitions, 381 flow [2024-11-19 09:19:15,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:19:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:19:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 412 transitions. [2024-11-19 09:19:15,527 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6387596899224807 [2024-11-19 09:19:15,527 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 208 flow. Second operand 5 states and 412 transitions. [2024-11-19 09:19:15,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 115 transitions, 381 flow [2024-11-19 09:19:15,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 115 transitions, 375 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:19:15,530 INFO L231 Difference]: Finished difference. Result has 92 places, 92 transitions, 196 flow [2024-11-19 09:19:15,530 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=92, PETRI_TRANSITIONS=92} [2024-11-19 09:19:15,531 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -30 predicate places. [2024-11-19 09:19:15,531 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 92 transitions, 196 flow [2024-11-19 09:19:15,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.2) internal successors, (346), 5 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:15,532 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:15,532 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:19:15,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:19:15,532 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:15,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:15,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1940325448, now seen corresponding path program 1 times [2024-11-19 09:19:15,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:15,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826007981] [2024-11-19 09:19:15,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:15,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:16,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:16,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826007981] [2024-11-19 09:19:16,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826007981] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:16,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:16,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:19:16,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134186048] [2024-11-19 09:19:16,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:16,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:19:16,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:16,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:19:16,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:19:16,376 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 129 [2024-11-19 09:19:16,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 59.857142857142854) internal successors, (419), 7 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:16,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:16,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 129 [2024-11-19 09:19:16,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:17,060 INFO L124 PetriNetUnfolderBase]: 2065/4255 cut-off events. [2024-11-19 09:19:17,060 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-19 09:19:17,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7680 conditions, 4255 events. 2065/4255 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 29561 event pairs, 289 based on Foata normal form. 0/3449 useless extension candidates. Maximal degree in co-relation 2479. Up to 2157 conditions per place. [2024-11-19 09:19:17,096 INFO L140 encePairwiseOnDemand]: 120/129 looper letters, 132 selfloop transitions, 11 changer transitions 0/182 dead transitions. [2024-11-19 09:19:17,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 182 transitions, 669 flow [2024-11-19 09:19:17,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:19:17,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:19:17,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 551 transitions. [2024-11-19 09:19:17,098 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6101882613510521 [2024-11-19 09:19:17,099 INFO L175 Difference]: Start difference. First operand has 92 places, 92 transitions, 196 flow. Second operand 7 states and 551 transitions. [2024-11-19 09:19:17,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 182 transitions, 669 flow [2024-11-19 09:19:17,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 182 transitions, 659 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:19:17,106 INFO L231 Difference]: Finished difference. Result has 98 places, 102 transitions, 262 flow [2024-11-19 09:19:17,106 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=262, PETRI_PLACES=98, PETRI_TRANSITIONS=102} [2024-11-19 09:19:17,107 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -24 predicate places. [2024-11-19 09:19:17,108 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 102 transitions, 262 flow [2024-11-19 09:19:17,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 59.857142857142854) internal successors, (419), 7 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:17,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:17,109 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:19:17,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 09:19:17,109 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:17,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:17,110 INFO L85 PathProgramCache]: Analyzing trace with hash -678346437, now seen corresponding path program 1 times [2024-11-19 09:19:17,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:17,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998127110] [2024-11-19 09:19:17,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:17,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:17,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:17,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998127110] [2024-11-19 09:19:17,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998127110] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:17,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:17,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:19:17,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188631829] [2024-11-19 09:19:17,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:17,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:19:17,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:17,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:19:17,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:19:17,212 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 129 [2024-11-19 09:19:17,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 102 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:17,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:17,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 129 [2024-11-19 09:19:17,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:17,400 INFO L124 PetriNetUnfolderBase]: 692/1652 cut-off events. [2024-11-19 09:19:17,401 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2024-11-19 09:19:17,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3114 conditions, 1652 events. 692/1652 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 10241 event pairs, 446 based on Foata normal form. 43/1432 useless extension candidates. Maximal degree in co-relation 3071. Up to 693 conditions per place. [2024-11-19 09:19:17,409 INFO L140 encePairwiseOnDemand]: 125/129 looper letters, 59 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2024-11-19 09:19:17,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 109 transitions, 391 flow [2024-11-19 09:19:17,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:19:17,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:19:17,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2024-11-19 09:19:17,411 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7260981912144703 [2024-11-19 09:19:17,413 INFO L175 Difference]: Start difference. First operand has 98 places, 102 transitions, 262 flow. Second operand 3 states and 281 transitions. [2024-11-19 09:19:17,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 109 transitions, 391 flow [2024-11-19 09:19:17,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 109 transitions, 387 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-19 09:19:17,419 INFO L231 Difference]: Finished difference. Result has 98 places, 98 transitions, 249 flow [2024-11-19 09:19:17,419 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=98, PETRI_TRANSITIONS=98} [2024-11-19 09:19:17,420 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -24 predicate places. [2024-11-19 09:19:17,420 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 98 transitions, 249 flow [2024-11-19 09:19:17,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:17,420 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:17,421 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:19:17,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:19:17,421 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:17,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:17,422 INFO L85 PathProgramCache]: Analyzing trace with hash 155541361, now seen corresponding path program 1 times [2024-11-19 09:19:17,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:17,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134004596] [2024-11-19 09:19:17,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:17,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:17,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:17,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134004596] [2024-11-19 09:19:17,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134004596] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:17,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:17,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:19:17,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445463086] [2024-11-19 09:19:17,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:17,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:19:17,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:17,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:19:17,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:19:17,477 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 129 [2024-11-19 09:19:17,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 98 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:17,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:17,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 129 [2024-11-19 09:19:17,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:17,681 INFO L124 PetriNetUnfolderBase]: 572/1382 cut-off events. [2024-11-19 09:19:17,681 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2024-11-19 09:19:17,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2663 conditions, 1382 events. 572/1382 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7618 event pairs, 380 based on Foata normal form. 12/1194 useless extension candidates. Maximal degree in co-relation 1698. Up to 753 conditions per place. [2024-11-19 09:19:17,687 INFO L140 encePairwiseOnDemand]: 126/129 looper letters, 62 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-11-19 09:19:17,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 111 transitions, 401 flow [2024-11-19 09:19:17,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:19:17,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:19:17,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2024-11-19 09:19:17,689 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7416020671834626 [2024-11-19 09:19:17,689 INFO L175 Difference]: Start difference. First operand has 98 places, 98 transitions, 249 flow. Second operand 3 states and 287 transitions. [2024-11-19 09:19:17,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 111 transitions, 401 flow [2024-11-19 09:19:17,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 111 transitions, 393 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-19 09:19:17,692 INFO L231 Difference]: Finished difference. Result has 99 places, 98 transitions, 248 flow [2024-11-19 09:19:17,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=99, PETRI_TRANSITIONS=98} [2024-11-19 09:19:17,693 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -23 predicate places. [2024-11-19 09:19:17,693 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 98 transitions, 248 flow [2024-11-19 09:19:17,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:17,694 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:17,694 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:19:17,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 09:19:17,694 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:17,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:17,695 INFO L85 PathProgramCache]: Analyzing trace with hash -451660651, now seen corresponding path program 1 times [2024-11-19 09:19:17,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:17,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682405080] [2024-11-19 09:19:17,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:17,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:17,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:17,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682405080] [2024-11-19 09:19:17,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682405080] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:17,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:17,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:19:17,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888060364] [2024-11-19 09:19:17,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:17,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:19:17,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:17,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:19:17,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:19:17,846 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 129 [2024-11-19 09:19:17,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 98 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:17,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:17,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 129 [2024-11-19 09:19:17,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:18,010 INFO L124 PetriNetUnfolderBase]: 572/1349 cut-off events. [2024-11-19 09:19:18,011 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2024-11-19 09:19:18,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2660 conditions, 1349 events. 572/1349 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7289 event pairs, 515 based on Foata normal form. 31/1215 useless extension candidates. Maximal degree in co-relation 809. Up to 1007 conditions per place. [2024-11-19 09:19:18,018 INFO L140 encePairwiseOnDemand]: 126/129 looper letters, 50 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2024-11-19 09:19:18,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 96 transitions, 346 flow [2024-11-19 09:19:18,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:19:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:19:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2024-11-19 09:19:18,020 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6847545219638242 [2024-11-19 09:19:18,020 INFO L175 Difference]: Start difference. First operand has 99 places, 98 transitions, 248 flow. Second operand 3 states and 265 transitions. [2024-11-19 09:19:18,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 96 transitions, 346 flow [2024-11-19 09:19:18,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 96 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:19:18,023 INFO L231 Difference]: Finished difference. Result has 98 places, 96 transitions, 244 flow [2024-11-19 09:19:18,024 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=98, PETRI_TRANSITIONS=96} [2024-11-19 09:19:18,025 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -24 predicate places. [2024-11-19 09:19:18,026 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 96 transitions, 244 flow [2024-11-19 09:19:18,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:18,026 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:18,026 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:19:18,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:19:18,026 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:18,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:18,027 INFO L85 PathProgramCache]: Analyzing trace with hash -451660650, now seen corresponding path program 1 times [2024-11-19 09:19:18,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:18,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513825621] [2024-11-19 09:19:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:18,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:18,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:18,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513825621] [2024-11-19 09:19:18,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513825621] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:18,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:18,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:19:18,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415911303] [2024-11-19 09:19:18,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:18,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:19:18,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:18,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:19:18,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:19:18,300 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 129 [2024-11-19 09:19:18,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 96 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:18,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:18,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 129 [2024-11-19 09:19:18,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:18,493 INFO L124 PetriNetUnfolderBase]: 587/1354 cut-off events. [2024-11-19 09:19:18,493 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-11-19 09:19:18,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2686 conditions, 1354 events. 587/1354 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7162 event pairs, 395 based on Foata normal form. 12/1197 useless extension candidates. Maximal degree in co-relation 2674. Up to 779 conditions per place. [2024-11-19 09:19:18,500 INFO L140 encePairwiseOnDemand]: 125/129 looper letters, 62 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2024-11-19 09:19:18,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 109 transitions, 401 flow [2024-11-19 09:19:18,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:19:18,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:19:18,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2024-11-19 09:19:18,502 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6937984496124031 [2024-11-19 09:19:18,503 INFO L175 Difference]: Start difference. First operand has 98 places, 96 transitions, 244 flow. Second operand 4 states and 358 transitions. [2024-11-19 09:19:18,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 109 transitions, 401 flow [2024-11-19 09:19:18,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 109 transitions, 400 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:19:18,506 INFO L231 Difference]: Finished difference. Result has 101 places, 96 transitions, 253 flow [2024-11-19 09:19:18,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=101, PETRI_TRANSITIONS=96} [2024-11-19 09:19:18,507 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -21 predicate places. [2024-11-19 09:19:18,507 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 96 transitions, 253 flow [2024-11-19 09:19:18,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:18,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:18,508 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:19:18,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 09:19:18,508 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:18,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:18,508 INFO L85 PathProgramCache]: Analyzing trace with hash 710870985, now seen corresponding path program 1 times [2024-11-19 09:19:18,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:18,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341914989] [2024-11-19 09:19:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:18,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:18,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:18,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341914989] [2024-11-19 09:19:18,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341914989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:19:18,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228136006] [2024-11-19 09:19:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:18,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:19:18,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:19:18,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:19:18,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:19:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:19,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-19 09:19:19,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:19:19,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 09:19:19,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2024-11-19 09:19:19,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:19:19,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 11 [2024-11-19 09:19:19,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2024-11-19 09:19:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:19,412 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:19:19,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228136006] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:19,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:19:19,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 12 [2024-11-19 09:19:19,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898907557] [2024-11-19 09:19:19,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:19,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:19:19,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:19,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:19:19,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:19:19,645 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 129 [2024-11-19 09:19:19,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 96 transitions, 253 flow. Second operand has 8 states, 8 states have (on average 70.75) internal successors, (566), 8 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:19,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:19,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 129 [2024-11-19 09:19:19,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:20,069 INFO L124 PetriNetUnfolderBase]: 643/1398 cut-off events. [2024-11-19 09:19:20,069 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2024-11-19 09:19:20,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2879 conditions, 1398 events. 643/1398 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 7115 event pairs, 168 based on Foata normal form. 0/1261 useless extension candidates. Maximal degree in co-relation 2865. Up to 771 conditions per place. [2024-11-19 09:19:20,076 INFO L140 encePairwiseOnDemand]: 120/129 looper letters, 87 selfloop transitions, 8 changer transitions 0/132 dead transitions. [2024-11-19 09:19:20,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 132 transitions, 518 flow [2024-11-19 09:19:20,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:19:20,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:19:20,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 571 transitions. [2024-11-19 09:19:20,079 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6323366555924695 [2024-11-19 09:19:20,079 INFO L175 Difference]: Start difference. First operand has 101 places, 96 transitions, 253 flow. Second operand 7 states and 571 transitions. [2024-11-19 09:19:20,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 132 transitions, 518 flow [2024-11-19 09:19:20,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 132 transitions, 510 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-19 09:19:20,083 INFO L231 Difference]: Finished difference. Result has 106 places, 97 transitions, 274 flow [2024-11-19 09:19:20,084 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=274, PETRI_PLACES=106, PETRI_TRANSITIONS=97} [2024-11-19 09:19:20,085 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -16 predicate places. [2024-11-19 09:19:20,086 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 97 transitions, 274 flow [2024-11-19 09:19:20,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.75) internal successors, (566), 8 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:20,086 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:20,086 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:19:20,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:19:20,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 09:19:20,287 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:20,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:20,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1766144426, now seen corresponding path program 1 times [2024-11-19 09:19:20,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:20,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469261966] [2024-11-19 09:19:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:20,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:21,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:21,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469261966] [2024-11-19 09:19:21,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469261966] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:19:21,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108053913] [2024-11-19 09:19:21,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:21,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:19:21,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:19:21,692 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:19:21,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:19:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:21,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-19 09:19:21,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:19:21,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 09:19:21,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2024-11-19 09:19:22,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:19:22,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 11 [2024-11-19 09:19:22,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2024-11-19 09:19:22,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 09:19:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:22,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:20:21,779 INFO L349 Elim1Store]: treesize reduction 47, result has 52.5 percent of original size [2024-11-19 09:20:21,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 146 [2024-11-19 09:20:21,805 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:20:21,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 111 [2024-11-19 09:20:21,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-11-19 09:20:21,995 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:20:21,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 73 [2024-11-19 09:20:22,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:22,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:22,160 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:20:22,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 47 [2024-11-19 09:20:22,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2024-11-19 09:20:22,177 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 09:20:22,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:22,185 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-19 09:20:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:20:22,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108053913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:20:22,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:20:22,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 11] total 32 [2024-11-19 09:20:22,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343149934] [2024-11-19 09:20:22,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:20:22,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-19 09:20:22,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:20:22,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-19 09:20:22,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=939, Unknown=8, NotChecked=0, Total=1122 [2024-11-19 09:20:26,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:20:31,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:20:33,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]