./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue.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 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:14:13,406 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:14:13,476 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:14:13,483 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:14:13,484 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:14:13,517 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:14:13,518 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:14:13,518 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:14:13,519 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:14:13,520 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:14:13,520 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:14:13,521 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:14:13,521 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:14:13,522 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:14:13,522 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:14:13,523 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:14:13,523 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:14:13,524 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:14:13,524 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:14:13,524 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:14:13,525 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:14:13,525 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:14:13,525 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:14:13,526 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:14:13,526 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:14:13,527 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:14:13,527 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:14:13,527 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:14:13,527 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:14:13,528 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:14:13,528 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:14:13,529 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:14:13,529 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:14:13,529 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:14:13,530 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:14:13,530 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:14:13,530 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:14:13,530 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:14:13,531 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:14:13,531 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:14:13,531 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:14:13,532 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:14:13,533 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 [2024-11-20 17:14:13,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:14:13,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:14:13,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:14:13,814 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:14:13,815 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:14:13,817 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue.i [2024-11-20 17:14:15,290 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:14:15,541 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:14:15,541 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue.i [2024-11-20 17:14:15,557 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/581101a3d/88351fe2954b42c59695b05f59a279a6/FLAG848c5afb9 [2024-11-20 17:14:15,570 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/581101a3d/88351fe2954b42c59695b05f59a279a6 [2024-11-20 17:14:15,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:14:15,575 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:14:15,577 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:14:15,578 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:14:15,582 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:14:15,583 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:14:15" (1/1) ... [2024-11-20 17:14:15,584 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e0156d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:14:15, skipping insertion in model container [2024-11-20 17:14:15,584 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:14:15" (1/1) ... [2024-11-20 17:14:15,630 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:14:16,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:14:16,132 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:14:16,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:14:16,285 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:14:16,285 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:14:16 WrapperNode [2024-11-20 17:14:16,289 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:14:16,291 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:14:16,291 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:14:16,291 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:14:16,298 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:14:16" (1/1) ... [2024-11-20 17:14:16,317 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:14:16" (1/1) ... [2024-11-20 17:14:16,356 INFO L138 Inliner]: procedures = 274, calls = 107, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 295 [2024-11-20 17:14:16,356 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:14:16,357 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:14:16,357 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:14:16,357 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:14:16,367 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:14:16" (1/1) ... [2024-11-20 17:14:16,368 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:14:16" (1/1) ... [2024-11-20 17:14:16,373 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:14:16" (1/1) ... [2024-11-20 17:14:16,389 INFO L175 MemorySlicer]: Split 92 memory accesses to 5 slices as follows [2, 8, 5, 23, 54]. 59 percent of accesses are in the largest equivalence class. The 58 initializations are split as follows [2, 8, 5, 20, 23]. The 16 writes are split as follows [0, 0, 0, 2, 14]. [2024-11-20 17:14:16,389 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:14:16" (1/1) ... [2024-11-20 17:14:16,389 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:14:16" (1/1) ... [2024-11-20 17:14:16,400 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:14:16" (1/1) ... [2024-11-20 17:14:16,407 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:14:16" (1/1) ... [2024-11-20 17:14:16,409 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:14:16" (1/1) ... [2024-11-20 17:14:16,414 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:14:16" (1/1) ... [2024-11-20 17:14:16,421 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:14:16,422 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:14:16,422 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:14:16,422 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:14:16,422 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:14:16" (1/1) ... [2024-11-20 17:14:16,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:14:16,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:14:16,449 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) [2024-11-20 17:14:16,451 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 [2024-11-20 17:14:16,491 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-20 17:14:16,491 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-20 17:14:16,491 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-20 17:14:16,491 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-20 17:14:16,492 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-20 17:14:16,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:14:16,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:14:16,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-20 17:14:16,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-20 17:14:16,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-20 17:14:16,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:14:16,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:14:16,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-20 17:14:16,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-20 17:14:16,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-20 17:14:16,493 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-20 17:14:16,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:14:16,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:14:16,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:14:16,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-20 17:14:16,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-20 17:14:16,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-20 17:14:16,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:14:16,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:14:16,495 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:14:16,642 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:14:16,644 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:14:17,174 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:14:17,175 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:14:17,527 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:14:17,527 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-20 17:14:17,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:14:17 BoogieIcfgContainer [2024-11-20 17:14:17,529 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:14:17,531 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:14:17,531 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:14:17,535 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:14:17,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:14:15" (1/3) ... [2024-11-20 17:14:17,536 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9fd368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:14:17, skipping insertion in model container [2024-11-20 17:14:17,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:14:16" (2/3) ... [2024-11-20 17:14:17,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9fd368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:14:17, skipping insertion in model container [2024-11-20 17:14:17,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:14:17" (3/3) ... [2024-11-20 17:14:17,538 INFO L112 eAbstractionObserver]: Analyzing ICFG queue.i [2024-11-20 17:14:17,555 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:14:17,556 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2024-11-20 17:14:17,556 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:14:17,684 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 17:14:17,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 172 transitions, 358 flow [2024-11-20 17:14:17,783 INFO L124 PetriNetUnfolderBase]: 14/170 cut-off events. [2024-11-20 17:14:17,784 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 17:14:17,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 170 events. 14/170 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 528 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 142. Up to 2 conditions per place. [2024-11-20 17:14:17,791 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 172 transitions, 358 flow [2024-11-20 17:14:17,799 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 169 transitions, 350 flow [2024-11-20 17:14:17,811 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:14:17,819 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;@3c28ea7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:14:17,820 INFO L334 AbstractCegarLoop]: Starting to check reachability of 134 error locations. [2024-11-20 17:14:17,824 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:14:17,824 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2024-11-20 17:14:17,824 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:14:17,824 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:17,825 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-11-20 17:14:17,826 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:17,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:17,831 INFO L85 PathProgramCache]: Analyzing trace with hash 25066, now seen corresponding path program 1 times [2024-11-20 17:14:17,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:17,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673788115] [2024-11-20 17:14:17,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:17,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:18,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:18,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673788115] [2024-11-20 17:14:18,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673788115] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:18,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:18,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:14:18,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857989119] [2024-11-20 17:14:18,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:18,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:14:18,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:18,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:14:18,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:14:18,387 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 172 [2024-11-20 17:14:18,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 169 transitions, 350 flow. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 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) [2024-11-20 17:14:18,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:18,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 172 [2024-11-20 17:14:18,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:19,095 INFO L124 PetriNetUnfolderBase]: 1744/4652 cut-off events. [2024-11-20 17:14:19,095 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-20 17:14:19,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7477 conditions, 4652 events. 1744/4652 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 37088 event pairs, 1393 based on Foata normal form. 182/3586 useless extension candidates. Maximal degree in co-relation 7362. Up to 2744 conditions per place. [2024-11-20 17:14:19,128 INFO L140 encePairwiseOnDemand]: 162/172 looper letters, 57 selfloop transitions, 2 changer transitions 0/153 dead transitions. [2024-11-20 17:14:19,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 153 transitions, 436 flow [2024-11-20 17:14:19,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:14:19,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:14:19,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 364 transitions. [2024-11-20 17:14:19,142 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7054263565891473 [2024-11-20 17:14:19,143 INFO L175 Difference]: Start difference. First operand has 162 places, 169 transitions, 350 flow. Second operand 3 states and 364 transitions. [2024-11-20 17:14:19,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 153 transitions, 436 flow [2024-11-20 17:14:19,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 153 transitions, 428 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:14:19,152 INFO L231 Difference]: Finished difference. Result has 150 places, 153 transitions, 314 flow [2024-11-20 17:14:19,154 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=150, PETRI_TRANSITIONS=153} [2024-11-20 17:14:19,158 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -12 predicate places. [2024-11-20 17:14:19,158 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 153 transitions, 314 flow [2024-11-20 17:14:19,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 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) [2024-11-20 17:14:19,159 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:19,159 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-11-20 17:14:19,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:14:19,159 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:19,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:19,160 INFO L85 PathProgramCache]: Analyzing trace with hash 25067, now seen corresponding path program 1 times [2024-11-20 17:14:19,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:19,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855008857] [2024-11-20 17:14:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:19,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:19,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:19,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855008857] [2024-11-20 17:14:19,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855008857] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:19,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:19,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:14:19,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442076756] [2024-11-20 17:14:19,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:19,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:14:19,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:19,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:14:19,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:14:19,419 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 172 [2024-11-20 17:14:19,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 153 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 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) [2024-11-20 17:14:19,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:19,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 172 [2024-11-20 17:14:19,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:19,929 INFO L124 PetriNetUnfolderBase]: 1744/4649 cut-off events. [2024-11-20 17:14:19,929 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-20 17:14:19,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7428 conditions, 4649 events. 1744/4649 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 37018 event pairs, 1393 based on Foata normal form. 3/3406 useless extension candidates. Maximal degree in co-relation 7417. Up to 2744 conditions per place. [2024-11-20 17:14:19,957 INFO L140 encePairwiseOnDemand]: 167/172 looper letters, 57 selfloop transitions, 2 changer transitions 0/150 dead transitions. [2024-11-20 17:14:19,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 150 transitions, 426 flow [2024-11-20 17:14:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:14:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:14:19,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2024-11-20 17:14:19,960 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6957364341085271 [2024-11-20 17:14:19,960 INFO L175 Difference]: Start difference. First operand has 150 places, 153 transitions, 314 flow. Second operand 3 states and 359 transitions. [2024-11-20 17:14:19,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 150 transitions, 426 flow [2024-11-20 17:14:19,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 150 transitions, 422 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:14:19,964 INFO L231 Difference]: Finished difference. Result has 147 places, 150 transitions, 308 flow [2024-11-20 17:14:19,965 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=308, PETRI_PLACES=147, PETRI_TRANSITIONS=150} [2024-11-20 17:14:19,966 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -15 predicate places. [2024-11-20 17:14:19,966 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 150 transitions, 308 flow [2024-11-20 17:14:19,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 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) [2024-11-20 17:14:19,967 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:19,967 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-20 17:14:19,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:14:19,968 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:19,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:19,969 INFO L85 PathProgramCache]: Analyzing trace with hash 747506238, now seen corresponding path program 1 times [2024-11-20 17:14:19,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:19,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765749799] [2024-11-20 17:14:19,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:19,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:20,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:20,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765749799] [2024-11-20 17:14:20,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765749799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:20,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:20,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:14:20,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944392150] [2024-11-20 17:14:20,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:20,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:14:20,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:20,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:14:20,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:14:20,239 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 172 [2024-11-20 17:14:20,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 150 transitions, 308 flow. Second operand has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 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) [2024-11-20 17:14:20,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:20,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 172 [2024-11-20 17:14:20,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:20,773 INFO L124 PetriNetUnfolderBase]: 1744/4647 cut-off events. [2024-11-20 17:14:20,773 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-20 17:14:20,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7426 conditions, 4647 events. 1744/4647 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 37009 event pairs, 1393 based on Foata normal form. 1/3404 useless extension candidates. Maximal degree in co-relation 7415. Up to 2743 conditions per place. [2024-11-20 17:14:20,805 INFO L140 encePairwiseOnDemand]: 167/172 looper letters, 56 selfloop transitions, 3 changer transitions 0/148 dead transitions. [2024-11-20 17:14:20,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 148 transitions, 422 flow [2024-11-20 17:14:20,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:14:20,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:14:20,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 461 transitions. [2024-11-20 17:14:20,808 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6700581395348837 [2024-11-20 17:14:20,808 INFO L175 Difference]: Start difference. First operand has 147 places, 150 transitions, 308 flow. Second operand 4 states and 461 transitions. [2024-11-20 17:14:20,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 148 transitions, 422 flow [2024-11-20 17:14:20,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 148 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:14:20,811 INFO L231 Difference]: Finished difference. Result has 146 places, 148 transitions, 306 flow [2024-11-20 17:14:20,811 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=306, PETRI_PLACES=146, PETRI_TRANSITIONS=148} [2024-11-20 17:14:20,812 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -16 predicate places. [2024-11-20 17:14:20,812 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 148 transitions, 306 flow [2024-11-20 17:14:20,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 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) [2024-11-20 17:14:20,813 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:20,813 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-20 17:14:20,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 17:14:20,814 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:20,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:20,814 INFO L85 PathProgramCache]: Analyzing trace with hash 747506239, now seen corresponding path program 1 times [2024-11-20 17:14:20,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:20,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47066111] [2024-11-20 17:14:20,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:20,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:20,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:20,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47066111] [2024-11-20 17:14:20,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47066111] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:20,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:20,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:14:20,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185374082] [2024-11-20 17:14:20,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:20,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:14:20,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:20,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:14:20,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:14:21,050 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 172 [2024-11-20 17:14:21,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 148 transitions, 306 flow. Second operand has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 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) [2024-11-20 17:14:21,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:21,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 172 [2024-11-20 17:14:21,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:21,509 INFO L124 PetriNetUnfolderBase]: 1744/4645 cut-off events. [2024-11-20 17:14:21,510 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-20 17:14:21,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7425 conditions, 4645 events. 1744/4645 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 37079 event pairs, 1393 based on Foata normal form. 2/3404 useless extension candidates. Maximal degree in co-relation 7410. Up to 2743 conditions per place. [2024-11-20 17:14:21,533 INFO L140 encePairwiseOnDemand]: 167/172 looper letters, 56 selfloop transitions, 3 changer transitions 0/146 dead transitions. [2024-11-20 17:14:21,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 146 transitions, 420 flow [2024-11-20 17:14:21,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:14:21,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:14:21,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 461 transitions. [2024-11-20 17:14:21,536 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6700581395348837 [2024-11-20 17:14:21,536 INFO L175 Difference]: Start difference. First operand has 146 places, 148 transitions, 306 flow. Second operand 4 states and 461 transitions. [2024-11-20 17:14:21,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 146 transitions, 420 flow [2024-11-20 17:14:21,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 146 transitions, 414 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:14:21,539 INFO L231 Difference]: Finished difference. Result has 144 places, 146 transitions, 302 flow [2024-11-20 17:14:21,539 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=302, PETRI_PLACES=144, PETRI_TRANSITIONS=146} [2024-11-20 17:14:21,540 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -18 predicate places. [2024-11-20 17:14:21,540 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 146 transitions, 302 flow [2024-11-20 17:14:21,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 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) [2024-11-20 17:14:21,541 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:21,541 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:21,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 17:14:21,541 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:21,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:21,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1029048543, now seen corresponding path program 1 times [2024-11-20 17:14:21,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:21,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74055034] [2024-11-20 17:14:21,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:21,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:21,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:21,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74055034] [2024-11-20 17:14:21,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74055034] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:21,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:21,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:14:21,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251620940] [2024-11-20 17:14:21,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:21,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:14:21,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:21,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:14:21,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:14:21,803 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 172 [2024-11-20 17:14:21,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 146 transitions, 302 flow. Second operand has 4 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 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) [2024-11-20 17:14:21,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:21,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 172 [2024-11-20 17:14:21,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:22,200 INFO L124 PetriNetUnfolderBase]: 1703/4144 cut-off events. [2024-11-20 17:14:22,200 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-20 17:14:22,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6880 conditions, 4144 events. 1703/4144 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 30735 event pairs, 702 based on Foata normal form. 204/3608 useless extension candidates. Maximal degree in co-relation 6865. Up to 1413 conditions per place. [2024-11-20 17:14:22,221 INFO L140 encePairwiseOnDemand]: 151/172 looper letters, 73 selfloop transitions, 5 changer transitions 0/149 dead transitions. [2024-11-20 17:14:22,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 149 transitions, 465 flow [2024-11-20 17:14:22,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:14:22,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:14:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 438 transitions. [2024-11-20 17:14:22,223 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6366279069767442 [2024-11-20 17:14:22,223 INFO L175 Difference]: Start difference. First operand has 144 places, 146 transitions, 302 flow. Second operand 4 states and 438 transitions. [2024-11-20 17:14:22,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 149 transitions, 465 flow [2024-11-20 17:14:22,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 149 transitions, 459 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:14:22,227 INFO L231 Difference]: Finished difference. Result has 128 places, 130 transitions, 274 flow [2024-11-20 17:14:22,229 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=274, PETRI_PLACES=128, PETRI_TRANSITIONS=130} [2024-11-20 17:14:22,230 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -34 predicate places. [2024-11-20 17:14:22,230 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 130 transitions, 274 flow [2024-11-20 17:14:22,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 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) [2024-11-20 17:14:22,232 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:22,232 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:22,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 17:14:22,233 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:22,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:22,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1029048544, now seen corresponding path program 1 times [2024-11-20 17:14:22,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:22,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648459200] [2024-11-20 17:14:22,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:22,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:22,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:22,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648459200] [2024-11-20 17:14:22,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648459200] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:22,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:22,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:14:22,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924388892] [2024-11-20 17:14:22,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:22,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:14:22,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:22,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:14:22,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:14:22,535 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 172 [2024-11-20 17:14:22,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 130 transitions, 274 flow. Second operand has 4 states, 4 states have (on average 90.25) internal successors, (361), 4 states have internal predecessors, (361), 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) [2024-11-20 17:14:22,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:22,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 172 [2024-11-20 17:14:22,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:23,047 INFO L124 PetriNetUnfolderBase]: 1703/3675 cut-off events. [2024-11-20 17:14:23,048 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2024-11-20 17:14:23,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6545 conditions, 3675 events. 1703/3675 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 24543 event pairs, 702 based on Foata normal form. 204/3340 useless extension candidates. Maximal degree in co-relation 2518. Up to 1413 conditions per place. [2024-11-20 17:14:23,069 INFO L140 encePairwiseOnDemand]: 153/172 looper letters, 73 selfloop transitions, 5 changer transitions 0/135 dead transitions. [2024-11-20 17:14:23,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 135 transitions, 441 flow [2024-11-20 17:14:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:14:23,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:14:23,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 444 transitions. [2024-11-20 17:14:23,072 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6453488372093024 [2024-11-20 17:14:23,072 INFO L175 Difference]: Start difference. First operand has 128 places, 130 transitions, 274 flow. Second operand 4 states and 444 transitions. [2024-11-20 17:14:23,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 135 transitions, 441 flow [2024-11-20 17:14:23,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 135 transitions, 431 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:14:23,076 INFO L231 Difference]: Finished difference. Result has 114 places, 116 transitions, 246 flow [2024-11-20 17:14:23,076 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=246, PETRI_PLACES=114, PETRI_TRANSITIONS=116} [2024-11-20 17:14:23,077 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -48 predicate places. [2024-11-20 17:14:23,077 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 116 transitions, 246 flow [2024-11-20 17:14:23,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.25) internal successors, (361), 4 states have internal predecessors, (361), 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) [2024-11-20 17:14:23,078 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:23,078 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:23,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 17:14:23,079 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:23,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:23,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1835734632, now seen corresponding path program 1 times [2024-11-20 17:14:23,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:23,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416035310] [2024-11-20 17:14:23,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:23,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:23,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:23,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416035310] [2024-11-20 17:14:23,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416035310] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:23,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:23,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:14:23,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724392909] [2024-11-20 17:14:23,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:23,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:14:23,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:23,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:14:23,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:14:24,034 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 172 [2024-11-20 17:14:24,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 116 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 77.57142857142857) internal successors, (543), 7 states have internal predecessors, (543), 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) [2024-11-20 17:14:24,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:24,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 172 [2024-11-20 17:14:24,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:24,746 INFO L124 PetriNetUnfolderBase]: 2502/5391 cut-off events. [2024-11-20 17:14:24,746 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-11-20 17:14:24,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9547 conditions, 5391 events. 2502/5391 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 38764 event pairs, 536 based on Foata normal form. 0/4393 useless extension candidates. Maximal degree in co-relation 3717. Up to 3436 conditions per place. [2024-11-20 17:14:24,772 INFO L140 encePairwiseOnDemand]: 163/172 looper letters, 124 selfloop transitions, 11 changer transitions 0/183 dead transitions. [2024-11-20 17:14:24,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 183 transitions, 655 flow [2024-11-20 17:14:24,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:14:24,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:14:24,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 669 transitions. [2024-11-20 17:14:24,775 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5556478405315615 [2024-11-20 17:14:24,775 INFO L175 Difference]: Start difference. First operand has 114 places, 116 transitions, 246 flow. Second operand 7 states and 669 transitions. [2024-11-20 17:14:24,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 183 transitions, 655 flow [2024-11-20 17:14:24,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 183 transitions, 643 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:14:24,780 INFO L231 Difference]: Finished difference. Result has 121 places, 126 transitions, 310 flow [2024-11-20 17:14:24,781 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=310, PETRI_PLACES=121, PETRI_TRANSITIONS=126} [2024-11-20 17:14:24,782 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -41 predicate places. [2024-11-20 17:14:24,783 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 126 transitions, 310 flow [2024-11-20 17:14:24,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.57142857142857) internal successors, (543), 7 states have internal predecessors, (543), 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) [2024-11-20 17:14:24,783 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:24,783 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:24,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 17:14:24,784 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:24,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:24,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1409040039, now seen corresponding path program 1 times [2024-11-20 17:14:24,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:24,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485756176] [2024-11-20 17:14:24,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:24,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:24,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:24,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485756176] [2024-11-20 17:14:24,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485756176] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:24,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:24,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:14:24,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81826369] [2024-11-20 17:14:24,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:24,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:14:24,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:24,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:14:24,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:14:24,900 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 172 [2024-11-20 17:14:24,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 126 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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) [2024-11-20 17:14:24,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:24,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 172 [2024-11-20 17:14:24,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:25,237 INFO L124 PetriNetUnfolderBase]: 1382/3218 cut-off events. [2024-11-20 17:14:25,238 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-11-20 17:14:25,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5612 conditions, 3218 events. 1382/3218 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 19582 event pairs, 703 based on Foata normal form. 55/2726 useless extension candidates. Maximal degree in co-relation 5605. Up to 1211 conditions per place. [2024-11-20 17:14:25,251 INFO L140 encePairwiseOnDemand]: 168/172 looper letters, 80 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2024-11-20 17:14:25,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 139 transitions, 476 flow [2024-11-20 17:14:25,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:14:25,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:14:25,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2024-11-20 17:14:25,254 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7558139534883721 [2024-11-20 17:14:25,254 INFO L175 Difference]: Start difference. First operand has 121 places, 126 transitions, 310 flow. Second operand 3 states and 390 transitions. [2024-11-20 17:14:25,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 139 transitions, 476 flow [2024-11-20 17:14:25,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 139 transitions, 451 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-11-20 17:14:25,258 INFO L231 Difference]: Finished difference. Result has 114 places, 116 transitions, 249 flow [2024-11-20 17:14:25,259 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=114, PETRI_TRANSITIONS=116} [2024-11-20 17:14:25,261 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -48 predicate places. [2024-11-20 17:14:25,262 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 116 transitions, 249 flow [2024-11-20 17:14:25,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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) [2024-11-20 17:14:25,266 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:25,266 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] [2024-11-20 17:14:25,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 17:14:25,266 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:25,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:25,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1094290775, now seen corresponding path program 1 times [2024-11-20 17:14:25,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:25,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247771901] [2024-11-20 17:14:25,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:25,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:25,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:25,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247771901] [2024-11-20 17:14:25,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247771901] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:25,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:25,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:14:25,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277335757] [2024-11-20 17:14:25,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:25,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:14:25,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:25,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:14:25,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:14:25,449 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 172 [2024-11-20 17:14:25,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 116 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 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) [2024-11-20 17:14:25,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:25,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 172 [2024-11-20 17:14:25,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:25,717 INFO L124 PetriNetUnfolderBase]: 1392/3289 cut-off events. [2024-11-20 17:14:25,717 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2024-11-20 17:14:25,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5671 conditions, 3289 events. 1392/3289 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 20418 event pairs, 1089 based on Foata normal form. 77/2806 useless extension candidates. Maximal degree in co-relation 5666. Up to 2215 conditions per place. [2024-11-20 17:14:25,731 INFO L140 encePairwiseOnDemand]: 168/172 looper letters, 59 selfloop transitions, 1 changer transitions 0/113 dead transitions. [2024-11-20 17:14:25,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 113 transitions, 363 flow [2024-11-20 17:14:25,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:14:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:14:25,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2024-11-20 17:14:25,733 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6957364341085271 [2024-11-20 17:14:25,733 INFO L175 Difference]: Start difference. First operand has 114 places, 116 transitions, 249 flow. Second operand 3 states and 359 transitions. [2024-11-20 17:14:25,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 113 transitions, 363 flow [2024-11-20 17:14:25,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 113 transitions, 360 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:14:25,736 INFO L231 Difference]: Finished difference. Result has 112 places, 113 transitions, 242 flow [2024-11-20 17:14:25,736 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=112, PETRI_TRANSITIONS=113} [2024-11-20 17:14:25,737 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -50 predicate places. [2024-11-20 17:14:25,737 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 113 transitions, 242 flow [2024-11-20 17:14:25,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 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) [2024-11-20 17:14:25,737 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:25,737 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] [2024-11-20 17:14:25,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 17:14:25,738 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:25,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:25,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1094290776, now seen corresponding path program 1 times [2024-11-20 17:14:25,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:25,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539687925] [2024-11-20 17:14:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:25,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:25,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:25,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539687925] [2024-11-20 17:14:25,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539687925] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:25,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:25,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:14:25,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540692728] [2024-11-20 17:14:25,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:25,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:14:25,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:25,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:14:25,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:14:25,941 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 172 [2024-11-20 17:14:25,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 113 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:14:25,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:25,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 172 [2024-11-20 17:14:25,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:26,218 INFO L124 PetriNetUnfolderBase]: 1392/3277 cut-off events. [2024-11-20 17:14:26,218 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-11-20 17:14:26,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5646 conditions, 3277 events. 1392/3277 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 20341 event pairs, 1089 based on Foata normal form. 0/2717 useless extension candidates. Maximal degree in co-relation 5641. Up to 2215 conditions per place. [2024-11-20 17:14:26,234 INFO L140 encePairwiseOnDemand]: 170/172 looper letters, 59 selfloop transitions, 1 changer transitions 0/112 dead transitions. [2024-11-20 17:14:26,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 112 transitions, 360 flow [2024-11-20 17:14:26,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:14:26,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:14:26,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2024-11-20 17:14:26,236 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7034883720930233 [2024-11-20 17:14:26,236 INFO L175 Difference]: Start difference. First operand has 112 places, 113 transitions, 242 flow. Second operand 3 states and 363 transitions. [2024-11-20 17:14:26,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 112 transitions, 360 flow [2024-11-20 17:14:26,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 112 transitions, 359 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:14:26,239 INFO L231 Difference]: Finished difference. Result has 112 places, 112 transitions, 241 flow [2024-11-20 17:14:26,239 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=112, PETRI_TRANSITIONS=112} [2024-11-20 17:14:26,239 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -50 predicate places. [2024-11-20 17:14:26,240 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 112 transitions, 241 flow [2024-11-20 17:14:26,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:14:26,240 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:26,240 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] [2024-11-20 17:14:26,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-20 17:14:26,241 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:26,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:26,241 INFO L85 PathProgramCache]: Analyzing trace with hash -436723347, now seen corresponding path program 1 times [2024-11-20 17:14:26,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:26,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387243975] [2024-11-20 17:14:26,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:26,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:26,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:26,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387243975] [2024-11-20 17:14:26,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387243975] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:26,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:26,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:14:26,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886473555] [2024-11-20 17:14:26,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:26,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:14:26,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:26,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:14:26,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:14:26,483 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 172 [2024-11-20 17:14:26,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 112 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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) [2024-11-20 17:14:26,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:26,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 172 [2024-11-20 17:14:26,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:26,777 INFO L124 PetriNetUnfolderBase]: 1392/3253 cut-off events. [2024-11-20 17:14:26,777 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-11-20 17:14:26,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5623 conditions, 3253 events. 1392/3253 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 20068 event pairs, 1074 based on Foata normal form. 12/2729 useless extension candidates. Maximal degree in co-relation 5618. Up to 2186 conditions per place. [2024-11-20 17:14:26,791 INFO L140 encePairwiseOnDemand]: 167/172 looper letters, 65 selfloop transitions, 3 changer transitions 0/118 dead transitions. [2024-11-20 17:14:26,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 118 transitions, 390 flow [2024-11-20 17:14:26,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:14:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:14:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 469 transitions. [2024-11-20 17:14:26,793 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6816860465116279 [2024-11-20 17:14:26,793 INFO L175 Difference]: Start difference. First operand has 112 places, 112 transitions, 241 flow. Second operand 4 states and 469 transitions. [2024-11-20 17:14:26,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 118 transitions, 390 flow [2024-11-20 17:14:26,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 118 transitions, 389 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:14:26,795 INFO L231 Difference]: Finished difference. Result has 112 places, 110 transitions, 242 flow [2024-11-20 17:14:26,796 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=242, PETRI_PLACES=112, PETRI_TRANSITIONS=110} [2024-11-20 17:14:26,796 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -50 predicate places. [2024-11-20 17:14:26,796 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 110 transitions, 242 flow [2024-11-20 17:14:26,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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) [2024-11-20 17:14:26,797 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:26,797 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] [2024-11-20 17:14:26,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 17:14:26,797 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:26,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:26,798 INFO L85 PathProgramCache]: Analyzing trace with hash -436723346, now seen corresponding path program 1 times [2024-11-20 17:14:26,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:26,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214623065] [2024-11-20 17:14:26,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:26,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:26,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:26,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214623065] [2024-11-20 17:14:26,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214623065] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:26,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:26,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:14:26,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915995014] [2024-11-20 17:14:26,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:26,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:14:26,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:26,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:14:26,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:14:27,127 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 172 [2024-11-20 17:14:27,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 110 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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) [2024-11-20 17:14:27,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:27,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 172 [2024-11-20 17:14:27,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:27,499 INFO L124 PetriNetUnfolderBase]: 1392/3229 cut-off events. [2024-11-20 17:14:27,500 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-20 17:14:27,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5624 conditions, 3229 events. 1392/3229 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 19788 event pairs, 1074 based on Foata normal form. 24/2729 useless extension candidates. Maximal degree in co-relation 5619. Up to 2186 conditions per place. [2024-11-20 17:14:27,516 INFO L140 encePairwiseOnDemand]: 167/172 looper letters, 65 selfloop transitions, 3 changer transitions 0/116 dead transitions. [2024-11-20 17:14:27,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 116 transitions, 391 flow [2024-11-20 17:14:27,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:14:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:14:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 469 transitions. [2024-11-20 17:14:27,518 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6816860465116279 [2024-11-20 17:14:27,518 INFO L175 Difference]: Start difference. First operand has 112 places, 110 transitions, 242 flow. Second operand 4 states and 469 transitions. [2024-11-20 17:14:27,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 116 transitions, 391 flow [2024-11-20 17:14:27,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 116 transitions, 385 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:14:27,524 INFO L231 Difference]: Finished difference. Result has 110 places, 108 transitions, 238 flow [2024-11-20 17:14:27,524 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=110, PETRI_TRANSITIONS=108} [2024-11-20 17:14:27,525 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -52 predicate places. [2024-11-20 17:14:27,525 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 108 transitions, 238 flow [2024-11-20 17:14:27,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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) [2024-11-20 17:14:27,525 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:27,525 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] [2024-11-20 17:14:27,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-20 17:14:27,526 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:27,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:27,526 INFO L85 PathProgramCache]: Analyzing trace with hash -653553668, now seen corresponding path program 1 times [2024-11-20 17:14:27,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:27,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790236220] [2024-11-20 17:14:27,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:27,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:27,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:27,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790236220] [2024-11-20 17:14:27,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790236220] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:27,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:27,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:14:27,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707043379] [2024-11-20 17:14:27,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:27,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:14:27,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:27,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:14:27,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:14:27,579 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 172 [2024-11-20 17:14:27,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 108 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:14:27,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:27,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 172 [2024-11-20 17:14:27,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:27,873 INFO L124 PetriNetUnfolderBase]: 1380/3217 cut-off events. [2024-11-20 17:14:27,873 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-20 17:14:27,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5600 conditions, 3217 events. 1380/3217 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 19787 event pairs, 1074 based on Foata normal form. 0/2705 useless extension candidates. Maximal degree in co-relation 5595. Up to 2175 conditions per place. [2024-11-20 17:14:27,887 INFO L140 encePairwiseOnDemand]: 169/172 looper letters, 65 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2024-11-20 17:14:27,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 115 transitions, 387 flow [2024-11-20 17:14:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:14:27,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:14:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 373 transitions. [2024-11-20 17:14:27,889 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7228682170542635 [2024-11-20 17:14:27,889 INFO L175 Difference]: Start difference. First operand has 110 places, 108 transitions, 238 flow. Second operand 3 states and 373 transitions. [2024-11-20 17:14:27,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 115 transitions, 387 flow [2024-11-20 17:14:27,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 115 transitions, 381 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:14:27,892 INFO L231 Difference]: Finished difference. Result has 109 places, 107 transitions, 234 flow [2024-11-20 17:14:27,892 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=109, PETRI_TRANSITIONS=107} [2024-11-20 17:14:27,892 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -53 predicate places. [2024-11-20 17:14:27,893 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 107 transitions, 234 flow [2024-11-20 17:14:27,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:14:27,893 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:27,893 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, 1, 1, 1, 1] [2024-11-20 17:14:27,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-20 17:14:27,894 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:27,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:27,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1388772758, now seen corresponding path program 1 times [2024-11-20 17:14:27,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:27,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731253076] [2024-11-20 17:14:27,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:27,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:28,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:28,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731253076] [2024-11-20 17:14:28,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731253076] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:28,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:28,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-20 17:14:28,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030492719] [2024-11-20 17:14:28,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:28,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:14:28,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:28,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:14:28,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:14:30,071 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 172 [2024-11-20 17:14:30,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 107 transitions, 234 flow. Second operand has 14 states, 14 states have (on average 94.57142857142857) internal successors, (1324), 14 states have internal predecessors, (1324), 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) [2024-11-20 17:14:30,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:30,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 172 [2024-11-20 17:14:30,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:30,958 INFO L124 PetriNetUnfolderBase]: 1847/4004 cut-off events. [2024-11-20 17:14:30,958 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-20 17:14:30,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7252 conditions, 4004 events. 1847/4004 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 24511 event pairs, 382 based on Foata normal form. 0/3520 useless extension candidates. Maximal degree in co-relation 7247. Up to 2245 conditions per place. [2024-11-20 17:14:30,978 INFO L140 encePairwiseOnDemand]: 158/172 looper letters, 143 selfloop transitions, 14 changer transitions 0/196 dead transitions. [2024-11-20 17:14:30,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 196 transitions, 741 flow [2024-11-20 17:14:30,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 17:14:30,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 17:14:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1366 transitions. [2024-11-20 17:14:30,982 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.610912343470483 [2024-11-20 17:14:30,983 INFO L175 Difference]: Start difference. First operand has 109 places, 107 transitions, 234 flow. Second operand 13 states and 1366 transitions. [2024-11-20 17:14:30,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 196 transitions, 741 flow [2024-11-20 17:14:30,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 196 transitions, 733 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:14:30,987 INFO L231 Difference]: Finished difference. Result has 123 places, 113 transitions, 292 flow [2024-11-20 17:14:30,987 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=292, PETRI_PLACES=123, PETRI_TRANSITIONS=113} [2024-11-20 17:14:30,987 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -39 predicate places. [2024-11-20 17:14:30,988 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 113 transitions, 292 flow [2024-11-20 17:14:30,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 94.57142857142857) internal successors, (1324), 14 states have internal predecessors, (1324), 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) [2024-11-20 17:14:30,988 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:30,989 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, 1, 1, 1, 1, 1] [2024-11-20 17:14:30,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-20 17:14:30,989 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:30,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:30,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1579885146, now seen corresponding path program 1 times [2024-11-20 17:14:30,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:30,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823177489] [2024-11-20 17:14:30,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:30,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:32,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:32,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823177489] [2024-11-20 17:14:32,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823177489] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:32,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:32,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-20 17:14:32,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974664799] [2024-11-20 17:14:32,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:32,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:14:32,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:32,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:14:32,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:14:33,130 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 172 [2024-11-20 17:14:33,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 113 transitions, 292 flow. Second operand has 14 states, 14 states have (on average 94.64285714285714) internal successors, (1325), 14 states have internal predecessors, (1325), 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) [2024-11-20 17:14:33,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:33,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 172 [2024-11-20 17:14:33,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:33,891 INFO L124 PetriNetUnfolderBase]: 1918/4006 cut-off events. [2024-11-20 17:14:33,891 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2024-11-20 17:14:33,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7615 conditions, 4006 events. 1918/4006 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 23839 event pairs, 434 based on Foata normal form. 0/3604 useless extension candidates. Maximal degree in co-relation 7606. Up to 1950 conditions per place. [2024-11-20 17:14:33,914 INFO L140 encePairwiseOnDemand]: 157/172 looper letters, 127 selfloop transitions, 19 changer transitions 0/182 dead transitions. [2024-11-20 17:14:33,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 182 transitions, 732 flow [2024-11-20 17:14:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 17:14:33,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 17:14:33,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1256 transitions. [2024-11-20 17:14:33,918 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6085271317829457 [2024-11-20 17:14:33,918 INFO L175 Difference]: Start difference. First operand has 123 places, 113 transitions, 292 flow. Second operand 12 states and 1256 transitions. [2024-11-20 17:14:33,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 182 transitions, 732 flow [2024-11-20 17:14:33,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 182 transitions, 719 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:14:33,922 INFO L231 Difference]: Finished difference. Result has 125 places, 110 transitions, 321 flow [2024-11-20 17:14:33,922 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=321, PETRI_PLACES=125, PETRI_TRANSITIONS=110} [2024-11-20 17:14:33,923 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -37 predicate places. [2024-11-20 17:14:33,923 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 110 transitions, 321 flow [2024-11-20 17:14:33,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 94.64285714285714) internal successors, (1325), 14 states have internal predecessors, (1325), 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) [2024-11-20 17:14:33,924 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:33,924 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:33,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-20 17:14:33,924 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:33,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:33,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1086505305, now seen corresponding path program 1 times [2024-11-20 17:14:33,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:33,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149783707] [2024-11-20 17:14:33,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:33,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:34,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:34,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149783707] [2024-11-20 17:14:34,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149783707] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:34,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:34,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:14:34,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902745795] [2024-11-20 17:14:34,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:34,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:14:34,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:34,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:14:34,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:14:34,676 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 172 [2024-11-20 17:14:34,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 110 transitions, 321 flow. Second operand has 7 states, 7 states have (on average 82.85714285714286) internal successors, (580), 7 states have internal predecessors, (580), 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) [2024-11-20 17:14:34,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:34,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 172 [2024-11-20 17:14:34,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:35,317 INFO L124 PetriNetUnfolderBase]: 3132/6246 cut-off events. [2024-11-20 17:14:35,318 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2024-11-20 17:14:35,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12286 conditions, 6246 events. 3132/6246 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 39337 event pairs, 536 based on Foata normal form. 80/5731 useless extension candidates. Maximal degree in co-relation 12276. Up to 1657 conditions per place. [2024-11-20 17:14:35,350 INFO L140 encePairwiseOnDemand]: 159/172 looper letters, 167 selfloop transitions, 21 changer transitions 0/226 dead transitions. [2024-11-20 17:14:35,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 226 transitions, 965 flow [2024-11-20 17:14:35,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:14:35,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:14:35,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 818 transitions. [2024-11-20 17:14:35,354 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5944767441860465 [2024-11-20 17:14:35,354 INFO L175 Difference]: Start difference. First operand has 125 places, 110 transitions, 321 flow. Second operand 8 states and 818 transitions. [2024-11-20 17:14:35,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 226 transitions, 965 flow [2024-11-20 17:14:35,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 226 transitions, 929 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-11-20 17:14:35,360 INFO L231 Difference]: Finished difference. Result has 127 places, 124 transitions, 419 flow [2024-11-20 17:14:35,360 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=419, PETRI_PLACES=127, PETRI_TRANSITIONS=124} [2024-11-20 17:14:35,361 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -35 predicate places. [2024-11-20 17:14:35,361 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 124 transitions, 419 flow [2024-11-20 17:14:35,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.85714285714286) internal successors, (580), 7 states have internal predecessors, (580), 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) [2024-11-20 17:14:35,361 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:35,362 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:35,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-20 17:14:35,362 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:35,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:35,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1431409847, now seen corresponding path program 1 times [2024-11-20 17:14:35,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:35,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077578147] [2024-11-20 17:14:35,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:35,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:36,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:36,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077578147] [2024-11-20 17:14:36,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077578147] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:36,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:36,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 17:14:36,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988970256] [2024-11-20 17:14:36,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:36,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:14:36,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:36,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:14:36,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:14:36,944 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 172 [2024-11-20 17:14:36,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 124 transitions, 419 flow. Second operand has 11 states, 11 states have (on average 77.54545454545455) internal successors, (853), 11 states have internal predecessors, (853), 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) [2024-11-20 17:14:36,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:36,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 172 [2024-11-20 17:14:36,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:37,914 INFO L124 PetriNetUnfolderBase]: 3897/7693 cut-off events. [2024-11-20 17:14:37,914 INFO L125 PetriNetUnfolderBase]: For 1945/1945 co-relation queries the response was YES. [2024-11-20 17:14:37,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16673 conditions, 7693 events. 3897/7693 cut-off events. For 1945/1945 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 49648 event pairs, 651 based on Foata normal form. 12/7066 useless extension candidates. Maximal degree in co-relation 16658. Up to 3967 conditions per place. [2024-11-20 17:14:37,967 INFO L140 encePairwiseOnDemand]: 156/172 looper letters, 169 selfloop transitions, 24 changer transitions 0/230 dead transitions. [2024-11-20 17:14:37,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 230 transitions, 1096 flow [2024-11-20 17:14:37,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 17:14:37,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-20 17:14:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 993 transitions. [2024-11-20 17:14:37,970 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5248414376321353 [2024-11-20 17:14:37,970 INFO L175 Difference]: Start difference. First operand has 127 places, 124 transitions, 419 flow. Second operand 11 states and 993 transitions. [2024-11-20 17:14:37,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 230 transitions, 1096 flow [2024-11-20 17:14:37,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 230 transitions, 1091 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-20 17:14:37,983 INFO L231 Difference]: Finished difference. Result has 140 places, 136 transitions, 587 flow [2024-11-20 17:14:37,983 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=587, PETRI_PLACES=140, PETRI_TRANSITIONS=136} [2024-11-20 17:14:37,983 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -22 predicate places. [2024-11-20 17:14:37,984 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 136 transitions, 587 flow [2024-11-20 17:14:37,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 77.54545454545455) internal successors, (853), 11 states have internal predecessors, (853), 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) [2024-11-20 17:14:37,984 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:37,984 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:37,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-20 17:14:37,985 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:37,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:37,985 INFO L85 PathProgramCache]: Analyzing trace with hash 893453218, now seen corresponding path program 1 times [2024-11-20 17:14:37,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:37,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461617594] [2024-11-20 17:14:37,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:37,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:38,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:38,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461617594] [2024-11-20 17:14:38,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461617594] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:38,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:38,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:14:38,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955105344] [2024-11-20 17:14:38,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:38,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:14:38,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:38,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:14:38,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:14:38,043 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 172 [2024-11-20 17:14:38,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 136 transitions, 587 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2024-11-20 17:14:38,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:38,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 172 [2024-11-20 17:14:38,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:39,269 INFO L124 PetriNetUnfolderBase]: 5619/12977 cut-off events. [2024-11-20 17:14:39,270 INFO L125 PetriNetUnfolderBase]: For 6849/6937 co-relation queries the response was YES. [2024-11-20 17:14:39,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27320 conditions, 12977 events. 5619/12977 cut-off events. For 6849/6937 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 108059 event pairs, 2755 based on Foata normal form. 261/11396 useless extension candidates. Maximal degree in co-relation 27301. Up to 5399 conditions per place. [2024-11-20 17:14:39,339 INFO L140 encePairwiseOnDemand]: 169/172 looper letters, 154 selfloop transitions, 2 changer transitions 0/209 dead transitions. [2024-11-20 17:14:39,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 209 transitions, 1276 flow [2024-11-20 17:14:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:14:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:14:39,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2024-11-20 17:14:39,341 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7965116279069767 [2024-11-20 17:14:39,341 INFO L175 Difference]: Start difference. First operand has 140 places, 136 transitions, 587 flow. Second operand 3 states and 411 transitions. [2024-11-20 17:14:39,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 209 transitions, 1276 flow [2024-11-20 17:14:39,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 209 transitions, 1245 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:14:39,357 INFO L231 Difference]: Finished difference. Result has 137 places, 137 transitions, 580 flow [2024-11-20 17:14:39,358 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=580, PETRI_PLACES=137, PETRI_TRANSITIONS=137} [2024-11-20 17:14:39,358 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -25 predicate places. [2024-11-20 17:14:39,358 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 137 transitions, 580 flow [2024-11-20 17:14:39,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2024-11-20 17:14:39,359 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:39,359 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:39,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-20 17:14:39,359 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:39,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:39,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1367824847, now seen corresponding path program 1 times [2024-11-20 17:14:39,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:39,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161911102] [2024-11-20 17:14:39,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:39,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:39,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:39,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161911102] [2024-11-20 17:14:39,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161911102] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:39,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:39,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:14:39,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306854403] [2024-11-20 17:14:39,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:39,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:14:39,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:39,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:14:39,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:14:39,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 172 [2024-11-20 17:14:39,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 137 transitions, 580 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 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) [2024-11-20 17:14:39,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:39,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 172 [2024-11-20 17:14:39,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:41,148 INFO L124 PetriNetUnfolderBase]: 7016/13981 cut-off events. [2024-11-20 17:14:41,148 INFO L125 PetriNetUnfolderBase]: For 8786/8834 co-relation queries the response was YES. [2024-11-20 17:14:41,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32995 conditions, 13981 events. 7016/13981 cut-off events. For 8786/8834 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 105726 event pairs, 4073 based on Foata normal form. 116/12974 useless extension candidates. Maximal degree in co-relation 32975. Up to 9466 conditions per place. [2024-11-20 17:14:41,219 INFO L140 encePairwiseOnDemand]: 167/172 looper letters, 120 selfloop transitions, 3 changer transitions 0/175 dead transitions. [2024-11-20 17:14:41,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 175 transitions, 982 flow [2024-11-20 17:14:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:14:41,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:14:41,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 492 transitions. [2024-11-20 17:14:41,221 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7151162790697675 [2024-11-20 17:14:41,221 INFO L175 Difference]: Start difference. First operand has 137 places, 137 transitions, 580 flow. Second operand 4 states and 492 transitions. [2024-11-20 17:14:41,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 175 transitions, 982 flow [2024-11-20 17:14:41,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 175 transitions, 978 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:14:41,245 INFO L231 Difference]: Finished difference. Result has 140 places, 138 transitions, 594 flow [2024-11-20 17:14:41,245 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=594, PETRI_PLACES=140, PETRI_TRANSITIONS=138} [2024-11-20 17:14:41,246 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -22 predicate places. [2024-11-20 17:14:41,246 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 138 transitions, 594 flow [2024-11-20 17:14:41,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 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) [2024-11-20 17:14:41,246 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:41,247 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:41,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-20 17:14:41,247 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:41,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:41,247 INFO L85 PathProgramCache]: Analyzing trace with hash -849156470, now seen corresponding path program 1 times [2024-11-20 17:14:41,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:41,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587757628] [2024-11-20 17:14:41,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:41,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:41,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:41,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587757628] [2024-11-20 17:14:41,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587757628] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:41,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:41,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:14:41,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784399682] [2024-11-20 17:14:41,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:41,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:14:41,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:41,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:14:41,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:14:41,310 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 172 [2024-11-20 17:14:41,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 138 transitions, 594 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2024-11-20 17:14:41,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:41,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 172 [2024-11-20 17:14:41,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:42,131 INFO L124 PetriNetUnfolderBase]: 3320/7321 cut-off events. [2024-11-20 17:14:42,132 INFO L125 PetriNetUnfolderBase]: For 4026/4032 co-relation queries the response was YES. [2024-11-20 17:14:42,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16233 conditions, 7321 events. 3320/7321 cut-off events. For 4026/4032 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 51656 event pairs, 1646 based on Foata normal form. 168/6786 useless extension candidates. Maximal degree in co-relation 16212. Up to 2910 conditions per place. [2024-11-20 17:14:42,163 INFO L140 encePairwiseOnDemand]: 168/172 looper letters, 88 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2024-11-20 17:14:42,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 139 transitions, 707 flow [2024-11-20 17:14:42,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:14:42,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:14:42,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2024-11-20 17:14:42,165 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7306201550387597 [2024-11-20 17:14:42,165 INFO L175 Difference]: Start difference. First operand has 140 places, 138 transitions, 594 flow. Second operand 3 states and 377 transitions. [2024-11-20 17:14:42,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 139 transitions, 707 flow [2024-11-20 17:14:42,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 139 transitions, 677 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-20 17:14:42,177 INFO L231 Difference]: Finished difference. Result has 136 places, 123 transitions, 466 flow [2024-11-20 17:14:42,177 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=466, PETRI_PLACES=136, PETRI_TRANSITIONS=123} [2024-11-20 17:14:42,177 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -26 predicate places. [2024-11-20 17:14:42,177 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 123 transitions, 466 flow [2024-11-20 17:14:42,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2024-11-20 17:14:42,178 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:42,178 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:42,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-20 17:14:42,178 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:42,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:42,179 INFO L85 PathProgramCache]: Analyzing trace with hash -352352858, now seen corresponding path program 1 times [2024-11-20 17:14:42,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:42,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484142691] [2024-11-20 17:14:42,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:42,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:42,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:42,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484142691] [2024-11-20 17:14:42,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484142691] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:42,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:42,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:14:42,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311144096] [2024-11-20 17:14:42,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:42,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:14:42,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:42,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:14:42,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:14:42,268 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 172 [2024-11-20 17:14:42,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 123 transitions, 466 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 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) [2024-11-20 17:14:42,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:42,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 172 [2024-11-20 17:14:42,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:42,844 INFO L124 PetriNetUnfolderBase]: 2059/5095 cut-off events. [2024-11-20 17:14:42,845 INFO L125 PetriNetUnfolderBase]: For 2323/2323 co-relation queries the response was YES. [2024-11-20 17:14:42,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11490 conditions, 5095 events. 2059/5095 cut-off events. For 2323/2323 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 33581 event pairs, 514 based on Foata normal form. 300/4950 useless extension candidates. Maximal degree in co-relation 11470. Up to 2482 conditions per place. [2024-11-20 17:14:42,873 INFO L140 encePairwiseOnDemand]: 166/172 looper letters, 80 selfloop transitions, 6 changer transitions 0/136 dead transitions. [2024-11-20 17:14:42,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 136 transitions, 682 flow [2024-11-20 17:14:42,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:14:42,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:14:42,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2024-11-20 17:14:42,875 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7306201550387597 [2024-11-20 17:14:42,876 INFO L175 Difference]: Start difference. First operand has 136 places, 123 transitions, 466 flow. Second operand 3 states and 377 transitions. [2024-11-20 17:14:42,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 136 transitions, 682 flow [2024-11-20 17:14:42,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 136 transitions, 672 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-20 17:14:42,885 INFO L231 Difference]: Finished difference. Result has 135 places, 123 transitions, 468 flow [2024-11-20 17:14:42,885 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=468, PETRI_PLACES=135, PETRI_TRANSITIONS=123} [2024-11-20 17:14:42,885 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -27 predicate places. [2024-11-20 17:14:42,886 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 123 transitions, 468 flow [2024-11-20 17:14:42,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 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) [2024-11-20 17:14:42,886 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:42,886 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:42,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-20 17:14:42,886 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:42,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:42,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1469388457, now seen corresponding path program 1 times [2024-11-20 17:14:42,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:42,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218060007] [2024-11-20 17:14:42,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:42,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:42,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:42,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218060007] [2024-11-20 17:14:42,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218060007] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:42,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:42,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:14:42,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820242815] [2024-11-20 17:14:42,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:42,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:14:42,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:43,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:14:43,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:14:43,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 172 [2024-11-20 17:14:43,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 123 transitions, 468 flow. Second operand has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 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) [2024-11-20 17:14:43,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:43,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 172 [2024-11-20 17:14:43,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:43,527 INFO L124 PetriNetUnfolderBase]: 2059/4758 cut-off events. [2024-11-20 17:14:43,527 INFO L125 PetriNetUnfolderBase]: For 2543/2545 co-relation queries the response was YES. [2024-11-20 17:14:43,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11541 conditions, 4758 events. 2059/4758 cut-off events. For 2543/2545 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 29755 event pairs, 1435 based on Foata normal form. 142/4675 useless extension candidates. Maximal degree in co-relation 11522. Up to 3087 conditions per place. [2024-11-20 17:14:43,550 INFO L140 encePairwiseOnDemand]: 161/172 looper letters, 75 selfloop transitions, 3 changer transitions 0/120 dead transitions. [2024-11-20 17:14:43,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 120 transitions, 625 flow [2024-11-20 17:14:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:14:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:14:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 445 transitions. [2024-11-20 17:14:43,552 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6468023255813954 [2024-11-20 17:14:43,552 INFO L175 Difference]: Start difference. First operand has 135 places, 123 transitions, 468 flow. Second operand 4 states and 445 transitions. [2024-11-20 17:14:43,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 120 transitions, 625 flow [2024-11-20 17:14:43,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 120 transitions, 619 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:14:43,562 INFO L231 Difference]: Finished difference. Result has 129 places, 115 transitions, 452 flow [2024-11-20 17:14:43,562 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=452, PETRI_PLACES=129, PETRI_TRANSITIONS=115} [2024-11-20 17:14:43,563 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -33 predicate places. [2024-11-20 17:14:43,563 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 115 transitions, 452 flow [2024-11-20 17:14:43,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 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) [2024-11-20 17:14:43,563 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:43,563 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:43,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-20 17:14:43,564 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:43,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:43,564 INFO L85 PathProgramCache]: Analyzing trace with hash 608441574, now seen corresponding path program 1 times [2024-11-20 17:14:43,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:43,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807851056] [2024-11-20 17:14:43,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:43,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:43,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:43,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807851056] [2024-11-20 17:14:43,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807851056] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:43,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:43,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:14:43,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698435891] [2024-11-20 17:14:43,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:43,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:14:43,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:43,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:14:43,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:14:43,933 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 172 [2024-11-20 17:14:43,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 115 transitions, 452 flow. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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) [2024-11-20 17:14:43,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:43,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 172 [2024-11-20 17:14:43,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:44,476 INFO L124 PetriNetUnfolderBase]: 2059/4557 cut-off events. [2024-11-20 17:14:44,476 INFO L125 PetriNetUnfolderBase]: For 2445/2447 co-relation queries the response was YES. [2024-11-20 17:14:44,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11162 conditions, 4557 events. 2059/4557 cut-off events. For 2445/2447 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 27175 event pairs, 1435 based on Foata normal form. 142/4571 useless extension candidates. Maximal degree in co-relation 11142. Up to 3087 conditions per place. [2024-11-20 17:14:44,501 INFO L140 encePairwiseOnDemand]: 162/172 looper letters, 75 selfloop transitions, 3 changer transitions 0/113 dead transitions. [2024-11-20 17:14:44,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 113 transitions, 611 flow [2024-11-20 17:14:44,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:14:44,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:14:44,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 448 transitions. [2024-11-20 17:14:44,503 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6511627906976745 [2024-11-20 17:14:44,503 INFO L175 Difference]: Start difference. First operand has 129 places, 115 transitions, 452 flow. Second operand 4 states and 448 transitions. [2024-11-20 17:14:44,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 113 transitions, 611 flow [2024-11-20 17:14:44,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 113 transitions, 605 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:14:44,512 INFO L231 Difference]: Finished difference. Result has 122 places, 108 transitions, 438 flow [2024-11-20 17:14:44,513 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=438, PETRI_PLACES=122, PETRI_TRANSITIONS=108} [2024-11-20 17:14:44,513 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -40 predicate places. [2024-11-20 17:14:44,513 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 108 transitions, 438 flow [2024-11-20 17:14:44,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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) [2024-11-20 17:14:44,514 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:44,514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:44,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-20 17:14:44,514 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:44,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:44,514 INFO L85 PathProgramCache]: Analyzing trace with hash 762566596, now seen corresponding path program 1 times [2024-11-20 17:14:44,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:44,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962455083] [2024-11-20 17:14:44,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:44,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:14:44,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:44,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962455083] [2024-11-20 17:14:44,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962455083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:14:44,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134311895] [2024-11-20 17:14:44,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:44,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:14:44,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:14:44,621 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) [2024-11-20 17:14:44,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:14:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:44,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-20 17:14:44,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:14:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:14:44,884 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:14:44,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134311895] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:44,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:14:44,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2024-11-20 17:14:44,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335973337] [2024-11-20 17:14:44,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:44,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:14:44,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:44,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:14:44,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:14:44,960 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 172 [2024-11-20 17:14:44,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 108 transitions, 438 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 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) [2024-11-20 17:14:44,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:44,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 172 [2024-11-20 17:14:44,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:45,353 INFO L124 PetriNetUnfolderBase]: 2059/4556 cut-off events. [2024-11-20 17:14:45,354 INFO L125 PetriNetUnfolderBase]: For 2417/2419 co-relation queries the response was YES. [2024-11-20 17:14:45,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11161 conditions, 4556 events. 2059/4556 cut-off events. For 2417/2419 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 27249 event pairs, 1639 based on Foata normal form. 9/4421 useless extension candidates. Maximal degree in co-relation 11141. Up to 3557 conditions per place. [2024-11-20 17:14:45,368 INFO L140 encePairwiseOnDemand]: 170/172 looper letters, 71 selfloop transitions, 1 changer transitions 2/107 dead transitions. [2024-11-20 17:14:45,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 107 transitions, 582 flow [2024-11-20 17:14:45,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:14:45,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:14:45,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 361 transitions. [2024-11-20 17:14:45,370 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6996124031007752 [2024-11-20 17:14:45,370 INFO L175 Difference]: Start difference. First operand has 122 places, 108 transitions, 438 flow. Second operand 3 states and 361 transitions. [2024-11-20 17:14:45,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 107 transitions, 582 flow [2024-11-20 17:14:45,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 107 transitions, 576 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:14:45,378 INFO L231 Difference]: Finished difference. Result has 120 places, 105 transitions, 427 flow [2024-11-20 17:14:45,378 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=427, PETRI_PLACES=120, PETRI_TRANSITIONS=105} [2024-11-20 17:14:45,378 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -42 predicate places. [2024-11-20 17:14:45,378 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 105 transitions, 427 flow [2024-11-20 17:14:45,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 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) [2024-11-20 17:14:45,379 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:45,379 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:45,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-20 17:14:45,579 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,SelfDestructingSolverStorable23 [2024-11-20 17:14:45,580 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:45,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1681820546, now seen corresponding path program 1 times [2024-11-20 17:14:45,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:45,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271803825] [2024-11-20 17:14:45,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:45,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:46,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:46,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271803825] [2024-11-20 17:14:46,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271803825] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:46,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:46,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-20 17:14:46,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439638075] [2024-11-20 17:14:46,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:46,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:14:46,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:46,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:14:46,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:14:46,407 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 172 [2024-11-20 17:14:46,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 105 transitions, 427 flow. Second operand has 7 states, 7 states have (on average 98.85714285714286) internal successors, (692), 7 states have internal predecessors, (692), 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) [2024-11-20 17:14:46,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:46,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 172 [2024-11-20 17:14:46,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:47,018 INFO L124 PetriNetUnfolderBase]: 2187/4662 cut-off events. [2024-11-20 17:14:47,018 INFO L125 PetriNetUnfolderBase]: For 2259/2259 co-relation queries the response was YES. [2024-11-20 17:14:47,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11566 conditions, 4662 events. 2187/4662 cut-off events. For 2259/2259 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 26948 event pairs, 810 based on Foata normal form. 0/4538 useless extension candidates. Maximal degree in co-relation 11546. Up to 1633 conditions per place. [2024-11-20 17:14:47,037 INFO L140 encePairwiseOnDemand]: 159/172 looper letters, 118 selfloop transitions, 18 changer transitions 2/159 dead transitions. [2024-11-20 17:14:47,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 159 transitions, 873 flow [2024-11-20 17:14:47,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:14:47,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:14:47,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 776 transitions. [2024-11-20 17:14:47,040 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6445182724252492 [2024-11-20 17:14:47,040 INFO L175 Difference]: Start difference. First operand has 120 places, 105 transitions, 427 flow. Second operand 7 states and 776 transitions. [2024-11-20 17:14:47,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 159 transitions, 873 flow [2024-11-20 17:14:47,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 159 transitions, 864 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:14:47,048 INFO L231 Difference]: Finished difference. Result has 124 places, 106 transitions, 473 flow [2024-11-20 17:14:47,048 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=473, PETRI_PLACES=124, PETRI_TRANSITIONS=106} [2024-11-20 17:14:47,049 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -38 predicate places. [2024-11-20 17:14:47,049 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 106 transitions, 473 flow [2024-11-20 17:14:47,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 98.85714285714286) internal successors, (692), 7 states have internal predecessors, (692), 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) [2024-11-20 17:14:47,049 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:47,049 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:47,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-20 17:14:47,050 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:47,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash 907794213, now seen corresponding path program 1 times [2024-11-20 17:14:47,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:47,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724385521] [2024-11-20 17:14:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:47,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:47,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:47,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724385521] [2024-11-20 17:14:47,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724385521] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:47,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:47,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 17:14:47,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533703884] [2024-11-20 17:14:47,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:47,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:14:47,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:47,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:14:47,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:14:48,232 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 172 [2024-11-20 17:14:48,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 106 transitions, 473 flow. Second operand has 10 states, 10 states have (on average 97.2) internal successors, (972), 10 states have internal predecessors, (972), 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) [2024-11-20 17:14:48,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:48,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 172 [2024-11-20 17:14:48,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:48,726 INFO L124 PetriNetUnfolderBase]: 1753/3718 cut-off events. [2024-11-20 17:14:48,726 INFO L125 PetriNetUnfolderBase]: For 1791/1791 co-relation queries the response was YES. [2024-11-20 17:14:48,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9180 conditions, 3718 events. 1753/3718 cut-off events. For 1791/1791 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 20034 event pairs, 375 based on Foata normal form. 0/3616 useless extension candidates. Maximal degree in co-relation 9159. Up to 2718 conditions per place. [2024-11-20 17:14:48,742 INFO L140 encePairwiseOnDemand]: 162/172 looper letters, 90 selfloop transitions, 9 changer transitions 4/123 dead transitions. [2024-11-20 17:14:48,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 123 transitions, 658 flow [2024-11-20 17:14:48,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:14:48,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:14:48,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 834 transitions. [2024-11-20 17:14:48,744 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6061046511627907 [2024-11-20 17:14:48,744 INFO L175 Difference]: Start difference. First operand has 124 places, 106 transitions, 473 flow. Second operand 8 states and 834 transitions. [2024-11-20 17:14:48,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 123 transitions, 658 flow [2024-11-20 17:14:48,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 123 transitions, 604 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-11-20 17:14:48,750 INFO L231 Difference]: Finished difference. Result has 110 places, 93 transitions, 318 flow [2024-11-20 17:14:48,750 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=318, PETRI_PLACES=110, PETRI_TRANSITIONS=93} [2024-11-20 17:14:48,751 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -52 predicate places. [2024-11-20 17:14:48,751 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 93 transitions, 318 flow [2024-11-20 17:14:48,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 97.2) internal successors, (972), 10 states have internal predecessors, (972), 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) [2024-11-20 17:14:48,752 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:48,752 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:48,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-20 17:14:48,753 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:48,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:48,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1473824688, now seen corresponding path program 1 times [2024-11-20 17:14:48,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:48,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17928930] [2024-11-20 17:14:48,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:48,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:49,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:49,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17928930] [2024-11-20 17:14:49,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17928930] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:49,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:49,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-20 17:14:49,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936403817] [2024-11-20 17:14:49,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:49,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:14:49,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:49,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:14:49,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:14:50,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 172 [2024-11-20 17:14:50,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 93 transitions, 318 flow. Second operand has 13 states, 13 states have (on average 95.23076923076923) internal successors, (1238), 13 states have internal predecessors, (1238), 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) [2024-11-20 17:14:50,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:50,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 172 [2024-11-20 17:14:50,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:51,048 INFO L124 PetriNetUnfolderBase]: 1467/3134 cut-off events. [2024-11-20 17:14:51,048 INFO L125 PetriNetUnfolderBase]: For 1180/1180 co-relation queries the response was YES. [2024-11-20 17:14:51,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7431 conditions, 3134 events. 1467/3134 cut-off events. For 1180/1180 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 15630 event pairs, 335 based on Foata normal form. 0/3060 useless extension candidates. Maximal degree in co-relation 7417. Up to 1466 conditions per place. [2024-11-20 17:14:51,059 INFO L140 encePairwiseOnDemand]: 155/172 looper letters, 120 selfloop transitions, 16 changer transitions 14/169 dead transitions. [2024-11-20 17:14:51,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 169 transitions, 854 flow [2024-11-20 17:14:51,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 17:14:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 17:14:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1241 transitions. [2024-11-20 17:14:51,061 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6012596899224806 [2024-11-20 17:14:51,062 INFO L175 Difference]: Start difference. First operand has 110 places, 93 transitions, 318 flow. Second operand 12 states and 1241 transitions. [2024-11-20 17:14:51,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 169 transitions, 854 flow [2024-11-20 17:14:51,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 169 transitions, 832 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-11-20 17:14:51,067 INFO L231 Difference]: Finished difference. Result has 116 places, 93 transitions, 334 flow [2024-11-20 17:14:51,068 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=334, PETRI_PLACES=116, PETRI_TRANSITIONS=93} [2024-11-20 17:14:51,068 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -46 predicate places. [2024-11-20 17:14:51,068 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 93 transitions, 334 flow [2024-11-20 17:14:51,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 95.23076923076923) internal successors, (1238), 13 states have internal predecessors, (1238), 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) [2024-11-20 17:14:51,069 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:51,069 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:51,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-20 17:14:51,070 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:51,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:51,070 INFO L85 PathProgramCache]: Analyzing trace with hash -585278985, now seen corresponding path program 1 times [2024-11-20 17:14:51,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:51,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089515870] [2024-11-20 17:14:51,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:51,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:53,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:53,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089515870] [2024-11-20 17:14:53,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089515870] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:53,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:53,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2024-11-20 17:14:53,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318352849] [2024-11-20 17:14:53,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:53,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 17:14:53,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:53,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 17:14:53,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-20 17:14:54,626 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 172 [2024-11-20 17:14:54,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 93 transitions, 334 flow. Second operand has 19 states, 19 states have (on average 64.26315789473684) internal successors, (1221), 19 states have internal predecessors, (1221), 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) [2024-11-20 17:14:54,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:54,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 172 [2024-11-20 17:14:54,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:55,491 INFO L124 PetriNetUnfolderBase]: 1625/3435 cut-off events. [2024-11-20 17:14:55,491 INFO L125 PetriNetUnfolderBase]: For 1487/1487 co-relation queries the response was YES. [2024-11-20 17:14:55,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8314 conditions, 3435 events. 1625/3435 cut-off events. For 1487/1487 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 17057 event pairs, 272 based on Foata normal form. 0/3346 useless extension candidates. Maximal degree in co-relation 8298. Up to 1150 conditions per place. [2024-11-20 17:14:55,506 INFO L140 encePairwiseOnDemand]: 151/172 looper letters, 149 selfloop transitions, 20 changer transitions 15/203 dead transitions. [2024-11-20 17:14:55,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 203 transitions, 1056 flow [2024-11-20 17:14:55,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 17:14:55,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 17:14:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1159 transitions. [2024-11-20 17:14:55,508 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4211482558139535 [2024-11-20 17:14:55,508 INFO L175 Difference]: Start difference. First operand has 116 places, 93 transitions, 334 flow. Second operand 16 states and 1159 transitions. [2024-11-20 17:14:55,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 203 transitions, 1056 flow [2024-11-20 17:14:55,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 203 transitions, 1028 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-20 17:14:55,514 INFO L231 Difference]: Finished difference. Result has 125 places, 99 transitions, 387 flow [2024-11-20 17:14:55,514 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=387, PETRI_PLACES=125, PETRI_TRANSITIONS=99} [2024-11-20 17:14:55,514 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -37 predicate places. [2024-11-20 17:14:55,514 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 99 transitions, 387 flow [2024-11-20 17:14:55,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.26315789473684) internal successors, (1221), 19 states have internal predecessors, (1221), 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) [2024-11-20 17:14:55,515 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:55,515 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:55,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-20 17:14:55,515 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting t2Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:55,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash 2085924187, now seen corresponding path program 1 times [2024-11-20 17:14:55,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:55,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944277782] [2024-11-20 17:14:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:55,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:55,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:55,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944277782] [2024-11-20 17:14:55,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944277782] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:55,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:55,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:14:55,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346038978] [2024-11-20 17:14:55,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:55,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:14:55,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:55,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:14:55,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:14:55,876 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 172 [2024-11-20 17:14:55,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 99 transitions, 387 flow. Second operand has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 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) [2024-11-20 17:14:55,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:14:55,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 172 [2024-11-20 17:14:55,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:14:56,319 INFO L124 PetriNetUnfolderBase]: 1494/3316 cut-off events. [2024-11-20 17:14:56,320 INFO L125 PetriNetUnfolderBase]: For 1661/1668 co-relation queries the response was YES. [2024-11-20 17:14:56,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8084 conditions, 3316 events. 1494/3316 cut-off events. For 1661/1668 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 17379 event pairs, 752 based on Foata normal form. 12/3257 useless extension candidates. Maximal degree in co-relation 8064. Up to 1868 conditions per place. [2024-11-20 17:14:56,335 INFO L140 encePairwiseOnDemand]: 168/172 looper letters, 116 selfloop transitions, 3 changer transitions 0/151 dead transitions. [2024-11-20 17:14:56,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 151 transitions, 844 flow [2024-11-20 17:14:56,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:14:56,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:14:56,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 503 transitions. [2024-11-20 17:14:56,337 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7311046511627907 [2024-11-20 17:14:56,337 INFO L175 Difference]: Start difference. First operand has 125 places, 99 transitions, 387 flow. Second operand 4 states and 503 transitions. [2024-11-20 17:14:56,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 151 transitions, 844 flow [2024-11-20 17:14:56,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 151 transitions, 809 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-20 17:14:56,343 INFO L231 Difference]: Finished difference. Result has 119 places, 99 transitions, 374 flow [2024-11-20 17:14:56,343 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=115, 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=374, PETRI_PLACES=119, PETRI_TRANSITIONS=99} [2024-11-20 17:14:56,344 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -43 predicate places. [2024-11-20 17:14:56,344 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 99 transitions, 374 flow [2024-11-20 17:14:56,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 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) [2024-11-20 17:14:56,344 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:14:56,344 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:14:56,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-20 17:14:56,345 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:14:56,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:14:56,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1440627542, now seen corresponding path program 1 times [2024-11-20 17:14:56,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:14:56,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769931353] [2024-11-20 17:14:56,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:14:56,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:14:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:14:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:14:58,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:14:58,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769931353] [2024-11-20 17:14:58,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769931353] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:14:58,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:14:58,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2024-11-20 17:14:58,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795844807] [2024-11-20 17:14:58,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:14:58,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 17:14:58,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:14:58,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 17:14:58,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-11-20 17:15:00,655 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 172 [2024-11-20 17:15:00,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 99 transitions, 374 flow. Second operand has 21 states, 21 states have (on average 94.38095238095238) internal successors, (1982), 21 states have internal predecessors, (1982), 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) [2024-11-20 17:15:00,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:15:00,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 172 [2024-11-20 17:15:00,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:15:01,565 INFO L124 PetriNetUnfolderBase]: 1597/3387 cut-off events. [2024-11-20 17:15:01,565 INFO L125 PetriNetUnfolderBase]: For 2205/2205 co-relation queries the response was YES. [2024-11-20 17:15:01,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8729 conditions, 3387 events. 1597/3387 cut-off events. For 2205/2205 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 16680 event pairs, 263 based on Foata normal form. 0/3348 useless extension candidates. Maximal degree in co-relation 8708. Up to 1099 conditions per place. [2024-11-20 17:15:01,581 INFO L140 encePairwiseOnDemand]: 148/172 looper letters, 154 selfloop transitions, 23 changer transitions 15/212 dead transitions. [2024-11-20 17:15:01,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 212 transitions, 1181 flow [2024-11-20 17:15:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 17:15:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-20 17:15:01,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1830 transitions. [2024-11-20 17:15:01,585 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5910852713178295 [2024-11-20 17:15:01,585 INFO L175 Difference]: Start difference. First operand has 119 places, 99 transitions, 374 flow. Second operand 18 states and 1830 transitions. [2024-11-20 17:15:01,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 212 transitions, 1181 flow [2024-11-20 17:15:01,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 212 transitions, 1135 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-20 17:15:01,595 INFO L231 Difference]: Finished difference. Result has 136 places, 101 transitions, 432 flow [2024-11-20 17:15:01,595 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=432, PETRI_PLACES=136, PETRI_TRANSITIONS=101} [2024-11-20 17:15:01,595 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -26 predicate places. [2024-11-20 17:15:01,596 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 101 transitions, 432 flow [2024-11-20 17:15:01,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 94.38095238095238) internal successors, (1982), 21 states have internal predecessors, (1982), 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) [2024-11-20 17:15:01,596 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:15:01,597 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:15:01,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-20 17:15:01,597 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:15:01,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:15:01,597 INFO L85 PathProgramCache]: Analyzing trace with hash 819514334, now seen corresponding path program 1 times [2024-11-20 17:15:01,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:15:01,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722404810] [2024-11-20 17:15:01,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:15:01,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:15:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:15:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:15:04,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:15:04,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722404810] [2024-11-20 17:15:04,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722404810] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:15:04,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:15:04,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2024-11-20 17:15:04,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530760781] [2024-11-20 17:15:04,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:15:04,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-20 17:15:04,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:15:04,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-20 17:15:04,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2024-11-20 17:15:09,337 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 172 [2024-11-20 17:15:09,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 101 transitions, 432 flow. Second operand has 28 states, 28 states have (on average 92.85714285714286) internal successors, (2600), 28 states have internal predecessors, (2600), 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) [2024-11-20 17:15:09,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:15:09,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 172 [2024-11-20 17:15:09,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:15:11,292 INFO L124 PetriNetUnfolderBase]: 1889/4023 cut-off events. [2024-11-20 17:15:11,292 INFO L125 PetriNetUnfolderBase]: For 2617/2618 co-relation queries the response was YES. [2024-11-20 17:15:11,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10681 conditions, 4023 events. 1889/4023 cut-off events. For 2617/2618 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 21481 event pairs, 450 based on Foata normal form. 0/3968 useless extension candidates. Maximal degree in co-relation 10657. Up to 2651 conditions per place. [2024-11-20 17:15:11,309 INFO L140 encePairwiseOnDemand]: 142/172 looper letters, 157 selfloop transitions, 51 changer transitions 20/248 dead transitions. [2024-11-20 17:15:11,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 248 transitions, 1477 flow [2024-11-20 17:15:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-20 17:15:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-20 17:15:11,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2849 transitions. [2024-11-20 17:15:11,313 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5711708099438653 [2024-11-20 17:15:11,313 INFO L175 Difference]: Start difference. First operand has 136 places, 101 transitions, 432 flow. Second operand 29 states and 2849 transitions. [2024-11-20 17:15:11,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 248 transitions, 1477 flow [2024-11-20 17:15:11,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 248 transitions, 1389 flow, removed 0 selfloop flow, removed 15 redundant places. [2024-11-20 17:15:11,325 INFO L231 Difference]: Finished difference. Result has 167 places, 147 transitions, 852 flow [2024-11-20 17:15:11,325 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=852, PETRI_PLACES=167, PETRI_TRANSITIONS=147} [2024-11-20 17:15:11,325 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, 5 predicate places. [2024-11-20 17:15:11,326 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 147 transitions, 852 flow [2024-11-20 17:15:11,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 92.85714285714286) internal successors, (2600), 28 states have internal predecessors, (2600), 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) [2024-11-20 17:15:11,327 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:15:11,327 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:15:11,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-20 17:15:11,327 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:15:11,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:15:11,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2032170018, now seen corresponding path program 2 times [2024-11-20 17:15:11,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:15:11,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874875062] [2024-11-20 17:15:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:15:11,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:15:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:15:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:15:14,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:15:14,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874875062] [2024-11-20 17:15:14,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874875062] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:15:14,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:15:14,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2024-11-20 17:15:14,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018640726] [2024-11-20 17:15:14,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:15:14,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-20 17:15:14,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:15:14,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-20 17:15:14,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2024-11-20 17:15:19,222 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 172 [2024-11-20 17:15:19,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 147 transitions, 852 flow. Second operand has 28 states, 28 states have (on average 93.82142857142857) internal successors, (2627), 28 states have internal predecessors, (2627), 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) [2024-11-20 17:15:19,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:15:19,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 172 [2024-11-20 17:15:19,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:15:21,363 INFO L124 PetriNetUnfolderBase]: 2128/4548 cut-off events. [2024-11-20 17:15:21,364 INFO L125 PetriNetUnfolderBase]: For 6808/6808 co-relation queries the response was YES. [2024-11-20 17:15:21,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13776 conditions, 4548 events. 2128/4548 cut-off events. For 6808/6808 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 25399 event pairs, 497 based on Foata normal form. 0/4487 useless extension candidates. Maximal degree in co-relation 13734. Up to 2972 conditions per place. [2024-11-20 17:15:21,391 INFO L140 encePairwiseOnDemand]: 144/172 looper letters, 194 selfloop transitions, 47 changer transitions 22/284 dead transitions. [2024-11-20 17:15:21,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 284 transitions, 2051 flow [2024-11-20 17:15:21,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-20 17:15:21,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-20 17:15:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2775 transitions. [2024-11-20 17:15:21,394 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5762043189368771 [2024-11-20 17:15:21,394 INFO L175 Difference]: Start difference. First operand has 167 places, 147 transitions, 852 flow. Second operand 28 states and 2775 transitions. [2024-11-20 17:15:21,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 284 transitions, 2051 flow [2024-11-20 17:15:21,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 284 transitions, 2023 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-11-20 17:15:21,415 INFO L231 Difference]: Finished difference. Result has 207 places, 181 transitions, 1313 flow [2024-11-20 17:15:21,415 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1313, PETRI_PLACES=207, PETRI_TRANSITIONS=181} [2024-11-20 17:15:21,415 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, 45 predicate places. [2024-11-20 17:15:21,415 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 181 transitions, 1313 flow [2024-11-20 17:15:21,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 93.82142857142857) internal successors, (2627), 28 states have internal predecessors, (2627), 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) [2024-11-20 17:15:21,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:15:21,417 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:15:21,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-11-20 17:15:21,417 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-11-20 17:15:21,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:15:21,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1530675948, now seen corresponding path program 3 times [2024-11-20 17:15:21,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:15:21,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765439426] [2024-11-20 17:15:21,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:15:21,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:15:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:15:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:15:23,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:15:23,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765439426] [2024-11-20 17:15:23,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765439426] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:15:23,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:15:23,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2024-11-20 17:15:23,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443775306] [2024-11-20 17:15:23,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:15:23,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-20 17:15:23,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:15:23,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-20 17:15:23,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650