./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.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 034172cc4904075fab6f792587170b7236be9fb41f3a62fa7fbe9a216ec4ca2c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:38:01,194 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:38:01,283 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:38:01,288 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:38:01,290 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:38:01,322 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:38:01,323 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:38:01,324 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:38:01,324 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:38:01,325 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:38:01,325 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:38:01,326 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:38:01,327 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:38:01,330 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:38:01,331 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:38:01,331 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:38:01,331 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:38:01,331 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:38:01,332 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:38:01,332 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:38:01,332 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:38:01,334 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:38:01,334 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:38:01,335 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:38:01,335 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:38:01,335 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:38:01,335 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:38:01,336 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:38:01,336 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:38:01,336 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:38:01,337 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:38:01,337 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:38:01,337 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:38:01,337 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:38:01,338 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:38:01,338 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:38:01,338 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:38:01,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:38:01,339 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:38:01,339 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:38:01,339 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:38:01,340 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:38:01,340 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 034172cc4904075fab6f792587170b7236be9fb41f3a62fa7fbe9a216ec4ca2c [2024-11-19 09:38:01,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:38:01,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:38:01,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:38:01,642 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:38:01,643 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:38:01,644 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i [2024-11-19 09:38:03,127 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:38:03,403 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:38:03,405 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i [2024-11-19 09:38:03,434 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fff89d922/3ed13917ea1743f1819232cdff78dd1e/FLAG78bb9c669 [2024-11-19 09:38:03,453 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fff89d922/3ed13917ea1743f1819232cdff78dd1e [2024-11-19 09:38:03,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:38:03,457 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:38:03,458 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:38:03,459 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:38:03,467 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:38:03,467 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:38:03" (1/1) ... [2024-11-19 09:38:03,468 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bbea3b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:03, skipping insertion in model container [2024-11-19 09:38:03,469 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:38:03" (1/1) ... [2024-11-19 09:38:03,527 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:38:04,125 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:38:04,175 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:38:04,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:38:04,397 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:38:04,397 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:04 WrapperNode [2024-11-19 09:38:04,398 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:38:04,399 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:38:04,400 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:38:04,402 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:38:04,410 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:04" (1/1) ... [2024-11-19 09:38:04,433 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:04" (1/1) ... [2024-11-19 09:38:04,477 INFO L138 Inliner]: procedures = 372, calls = 94, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 218 [2024-11-19 09:38:04,479 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:38:04,480 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:38:04,484 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:38:04,484 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:38:04,493 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:04" (1/1) ... [2024-11-19 09:38:04,494 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:04" (1/1) ... [2024-11-19 09:38:04,499 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:04" (1/1) ... [2024-11-19 09:38:04,522 INFO L175 MemorySlicer]: Split 88 memory accesses to 3 slices as follows [50, 16, 22]. 57 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [50, 10, 0]. The 17 writes are split as follows [0, 1, 16]. [2024-11-19 09:38:04,523 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:04" (1/1) ... [2024-11-19 09:38:04,523 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:04" (1/1) ... [2024-11-19 09:38:04,538 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:04" (1/1) ... [2024-11-19 09:38:04,541 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:04" (1/1) ... [2024-11-19 09:38:04,544 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:04" (1/1) ... [2024-11-19 09:38:04,546 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:04" (1/1) ... [2024-11-19 09:38:04,551 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:38:04,552 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:38:04,552 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:38:04,552 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:38:04,554 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:04" (1/1) ... [2024-11-19 09:38:04,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:38:04,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:38:04,608 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 09:38:04,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 09:38:04,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-19 09:38:04,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-19 09:38:04,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-19 09:38:04,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-19 09:38:04,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-19 09:38:04,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-19 09:38:04,676 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-19 09:38:04,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:38:04,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:38:04,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 09:38:04,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:38:04,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:38:04,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 09:38:04,677 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-19 09:38:04,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:38:04,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:38:04,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-19 09:38:04,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-19 09:38:04,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-19 09:38:04,677 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-19 09:38:04,677 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-19 09:38:04,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:38:04,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:38:04,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 09:38:04,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:38:04,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:38:04,681 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:38:04,860 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:38:04,863 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:38:05,429 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:38:05,429 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:38:05,900 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:38:05,902 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-19 09:38:05,903 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:38:05 BoogieIcfgContainer [2024-11-19 09:38:05,903 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:38:05,906 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:38:05,907 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:38:05,910 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:38:05,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:38:03" (1/3) ... [2024-11-19 09:38:05,911 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:38:05, skipping insertion in model container [2024-11-19 09:38:05,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:04" (2/3) ... [2024-11-19 09:38:05,912 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:38:05, skipping insertion in model container [2024-11-19 09:38:05,913 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:38:05" (3/3) ... [2024-11-19 09:38:05,914 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_12-arraycollapse_rc.i [2024-11-19 09:38:05,933 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:38:05,933 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2024-11-19 09:38:05,933 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:38:06,006 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 09:38:06,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 101 transitions, 206 flow [2024-11-19 09:38:06,102 INFO L124 PetriNetUnfolderBase]: 1/100 cut-off events. [2024-11-19 09:38:06,102 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:38:06,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 100 events. 1/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 324 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2024-11-19 09:38:06,105 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 101 transitions, 206 flow [2024-11-19 09:38:06,110 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 100 transitions, 203 flow [2024-11-19 09:38:06,123 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:38:06,132 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;@33760a3e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:38:06,133 INFO L334 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2024-11-19 09:38:06,140 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:38:06,141 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-19 09:38:06,141 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:38:06,141 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:06,142 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:38:06,142 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-19 09:38:06,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:06,149 INFO L85 PathProgramCache]: Analyzing trace with hash 625045, now seen corresponding path program 1 times [2024-11-19 09:38:06,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:06,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263212667] [2024-11-19 09:38:06,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:06,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:06,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:06,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263212667] [2024-11-19 09:38:06,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263212667] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:38:06,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:38:06,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:38:06,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330198699] [2024-11-19 09:38:06,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:38:06,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:38:06,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:06,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:38:06,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:38:06,748 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 101 [2024-11-19 09:38:06,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 100 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:06,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:06,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 101 [2024-11-19 09:38:06,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:06,950 INFO L124 PetriNetUnfolderBase]: 64/290 cut-off events. [2024-11-19 09:38:06,951 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:38:06,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 290 events. 64/290 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1348 event pairs, 63 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 377. Up to 157 conditions per place. [2024-11-19 09:38:06,957 INFO L140 encePairwiseOnDemand]: 89/101 looper letters, 30 selfloop transitions, 6 changer transitions 0/94 dead transitions. [2024-11-19 09:38:06,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 94 transitions, 263 flow [2024-11-19 09:38:06,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:38:06,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:38:06,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2024-11-19 09:38:06,976 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7227722772277227 [2024-11-19 09:38:06,978 INFO L175 Difference]: Start difference. First operand has 103 places, 100 transitions, 203 flow. Second operand 3 states and 219 transitions. [2024-11-19 09:38:06,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 94 transitions, 263 flow [2024-11-19 09:38:06,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 94 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:38:06,987 INFO L231 Difference]: Finished difference. Result has 98 places, 94 transitions, 202 flow [2024-11-19 09:38:06,990 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=98, PETRI_TRANSITIONS=94} [2024-11-19 09:38:06,996 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2024-11-19 09:38:06,996 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 94 transitions, 202 flow [2024-11-19 09:38:06,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:06,996 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:06,997 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:38:06,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:38:06,997 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-19 09:38:06,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:06,999 INFO L85 PathProgramCache]: Analyzing trace with hash 625046, now seen corresponding path program 1 times [2024-11-19 09:38:06,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:07,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250485123] [2024-11-19 09:38:07,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:07,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:07,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:07,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250485123] [2024-11-19 09:38:07,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250485123] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:38:07,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:38:07,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:38:07,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340791541] [2024-11-19 09:38:07,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:38:07,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:38:07,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:07,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:38:07,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:38:07,265 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2024-11-19 09:38:07,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 94 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:07,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:07,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2024-11-19 09:38:07,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:07,400 INFO L124 PetriNetUnfolderBase]: 64/284 cut-off events. [2024-11-19 09:38:07,400 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:38:07,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 284 events. 64/284 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1317 event pairs, 63 based on Foata normal form. 6/224 useless extension candidates. Maximal degree in co-relation 411. Up to 157 conditions per place. [2024-11-19 09:38:07,405 INFO L140 encePairwiseOnDemand]: 89/101 looper letters, 27 selfloop transitions, 6 changer transitions 0/88 dead transitions. [2024-11-19 09:38:07,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 88 transitions, 256 flow [2024-11-19 09:38:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:38:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:38:07,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2024-11-19 09:38:07,409 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7425742574257426 [2024-11-19 09:38:07,409 INFO L175 Difference]: Start difference. First operand has 98 places, 94 transitions, 202 flow. Second operand 3 states and 225 transitions. [2024-11-19 09:38:07,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 88 transitions, 256 flow [2024-11-19 09:38:07,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 88 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:38:07,414 INFO L231 Difference]: Finished difference. Result has 92 places, 88 transitions, 190 flow [2024-11-19 09:38:07,415 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=92, PETRI_TRANSITIONS=88} [2024-11-19 09:38:07,416 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -11 predicate places. [2024-11-19 09:38:07,416 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 88 transitions, 190 flow [2024-11-19 09:38:07,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:07,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:07,418 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 09:38:07,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:38:07,418 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-19 09:38:07,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:07,419 INFO L85 PathProgramCache]: Analyzing trace with hash 600687964, now seen corresponding path program 1 times [2024-11-19 09:38:07,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:07,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74971033] [2024-11-19 09:38:07,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:07,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:07,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:07,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74971033] [2024-11-19 09:38:07,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74971033] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:38:07,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:38:07,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:38:07,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897912799] [2024-11-19 09:38:07,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:38:07,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:38:07,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:07,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:38:07,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:38:07,921 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 101 [2024-11-19 09:38:07,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 88 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 54.8) internal successors, (274), 5 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:07,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:07,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 101 [2024-11-19 09:38:07,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:08,145 INFO L124 PetriNetUnfolderBase]: 81/343 cut-off events. [2024-11-19 09:38:08,145 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-19 09:38:08,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 343 events. 81/343 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1638 event pairs, 80 based on Foata normal form. 1/263 useless extension candidates. Maximal degree in co-relation 492. Up to 202 conditions per place. [2024-11-19 09:38:08,150 INFO L140 encePairwiseOnDemand]: 90/101 looper letters, 42 selfloop transitions, 6 changer transitions 0/95 dead transitions. [2024-11-19 09:38:08,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 95 transitions, 308 flow [2024-11-19 09:38:08,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:38:08,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:38:08,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 269 transitions. [2024-11-19 09:38:08,153 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6658415841584159 [2024-11-19 09:38:08,154 INFO L175 Difference]: Start difference. First operand has 92 places, 88 transitions, 190 flow. Second operand 4 states and 269 transitions. [2024-11-19 09:38:08,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 95 transitions, 308 flow [2024-11-19 09:38:08,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 95 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:38:08,159 INFO L231 Difference]: Finished difference. Result has 95 places, 93 transitions, 230 flow [2024-11-19 09:38:08,159 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=95, PETRI_TRANSITIONS=93} [2024-11-19 09:38:08,160 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -8 predicate places. [2024-11-19 09:38:08,160 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 93 transitions, 230 flow [2024-11-19 09:38:08,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.8) internal successors, (274), 5 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:08,160 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:08,160 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:38:08,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:38:08,161 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-19 09:38:08,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:08,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1402588596, now seen corresponding path program 1 times [2024-11-19 09:38:08,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:08,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923397155] [2024-11-19 09:38:08,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:08,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:08,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:08,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923397155] [2024-11-19 09:38:08,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923397155] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:38:08,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:38:08,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:38:08,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597826192] [2024-11-19 09:38:08,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:38:08,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:38:08,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:08,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:38:08,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:38:08,918 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 101 [2024-11-19 09:38:08,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 93 transitions, 230 flow. Second operand has 7 states, 7 states have (on average 51.285714285714285) internal successors, (359), 7 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:08,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:08,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 101 [2024-11-19 09:38:08,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:09,133 INFO L124 PetriNetUnfolderBase]: 64/294 cut-off events. [2024-11-19 09:38:09,134 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:38:09,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 294 events. 64/294 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1298 event pairs, 63 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 457. Up to 154 conditions per place. [2024-11-19 09:38:09,138 INFO L140 encePairwiseOnDemand]: 85/101 looper letters, 29 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-11-19 09:38:09,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 89 transitions, 314 flow [2024-11-19 09:38:09,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:38:09,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:38:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 445 transitions. [2024-11-19 09:38:09,142 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5507425742574258 [2024-11-19 09:38:09,142 INFO L175 Difference]: Start difference. First operand has 95 places, 93 transitions, 230 flow. Second operand 8 states and 445 transitions. [2024-11-19 09:38:09,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 89 transitions, 314 flow [2024-11-19 09:38:09,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 89 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:38:09,148 INFO L231 Difference]: Finished difference. Result has 97 places, 89 transitions, 254 flow [2024-11-19 09:38:09,148 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=254, PETRI_PLACES=97, PETRI_TRANSITIONS=89} [2024-11-19 09:38:09,149 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -6 predicate places. [2024-11-19 09:38:09,149 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 89 transitions, 254 flow [2024-11-19 09:38:09,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 51.285714285714285) internal successors, (359), 7 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:09,151 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:09,151 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:38:09,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:38:09,152 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-19 09:38:09,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:09,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1402588597, now seen corresponding path program 1 times [2024-11-19 09:38:09,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:09,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632444685] [2024-11-19 09:38:09,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:09,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:09,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:09,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632444685] [2024-11-19 09:38:09,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632444685] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:38:09,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:38:09,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:38:09,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887151734] [2024-11-19 09:38:09,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:38:09,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:38:09,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:09,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:38:09,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:38:10,173 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 101 [2024-11-19 09:38:10,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 89 transitions, 254 flow. Second operand has 7 states, 7 states have (on average 48.285714285714285) internal successors, (338), 7 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) [2024-11-19 09:38:10,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:10,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 101 [2024-11-19 09:38:10,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:10,369 INFO L124 PetriNetUnfolderBase]: 64/290 cut-off events. [2024-11-19 09:38:10,369 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-19 09:38:10,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 290 events. 64/290 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1289 event pairs, 63 based on Foata normal form. 2/234 useless extension candidates. Maximal degree in co-relation 444. Up to 158 conditions per place. [2024-11-19 09:38:10,372 INFO L140 encePairwiseOnDemand]: 91/101 looper letters, 32 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2024-11-19 09:38:10,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 87 transitions, 340 flow [2024-11-19 09:38:10,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:38:10,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:38:10,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 371 transitions. [2024-11-19 09:38:10,374 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5247524752475248 [2024-11-19 09:38:10,374 INFO L175 Difference]: Start difference. First operand has 97 places, 89 transitions, 254 flow. Second operand 7 states and 371 transitions. [2024-11-19 09:38:10,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 87 transitions, 340 flow [2024-11-19 09:38:10,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 87 transitions, 306 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-19 09:38:10,377 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 242 flow [2024-11-19 09:38:10,377 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=242, PETRI_PLACES=94, PETRI_TRANSITIONS=87} [2024-11-19 09:38:10,380 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -9 predicate places. [2024-11-19 09:38:10,381 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 242 flow [2024-11-19 09:38:10,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 48.285714285714285) internal successors, (338), 7 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) [2024-11-19 09:38:10,382 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:10,382 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:38:10,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:38:10,383 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-19 09:38:10,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:10,386 INFO L85 PathProgramCache]: Analyzing trace with hash -732068759, now seen corresponding path program 1 times [2024-11-19 09:38:10,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:10,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264939611] [2024-11-19 09:38:10,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:10,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:10,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:10,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264939611] [2024-11-19 09:38:10,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264939611] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:38:10,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:38:10,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:38:10,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219412195] [2024-11-19 09:38:10,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:38:10,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:38:10,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:10,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:38:10,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:38:10,647 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 101 [2024-11-19 09:38:10,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 87 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:10,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:10,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 101 [2024-11-19 09:38:10,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:10,793 INFO L124 PetriNetUnfolderBase]: 64/288 cut-off events. [2024-11-19 09:38:10,793 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-19 09:38:10,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 502 conditions, 288 events. 64/288 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1268 event pairs, 63 based on Foata normal form. 2/230 useless extension candidates. Maximal degree in co-relation 437. Up to 158 conditions per place. [2024-11-19 09:38:10,795 INFO L140 encePairwiseOnDemand]: 92/101 looper letters, 30 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2024-11-19 09:38:10,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 86 transitions, 326 flow [2024-11-19 09:38:10,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:38:10,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:38:10,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 319 transitions. [2024-11-19 09:38:10,796 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6316831683168317 [2024-11-19 09:38:10,796 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 242 flow. Second operand 5 states and 319 transitions. [2024-11-19 09:38:10,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 86 transitions, 326 flow [2024-11-19 09:38:10,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 86 transitions, 300 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:38:10,799 INFO L231 Difference]: Finished difference. Result has 91 places, 86 transitions, 240 flow [2024-11-19 09:38:10,799 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=91, PETRI_TRANSITIONS=86} [2024-11-19 09:38:10,802 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -12 predicate places. [2024-11-19 09:38:10,802 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 86 transitions, 240 flow [2024-11-19 09:38:10,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:10,804 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:10,804 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:38:10,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:38:10,804 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-19 09:38:10,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:10,805 INFO L85 PathProgramCache]: Analyzing trace with hash -732068758, now seen corresponding path program 1 times [2024-11-19 09:38:10,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:10,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947779305] [2024-11-19 09:38:10,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:10,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:10,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:10,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947779305] [2024-11-19 09:38:10,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947779305] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:38:10,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:38:10,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:38:10,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50666033] [2024-11-19 09:38:10,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:38:10,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:38:10,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:10,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:38:10,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:38:11,193 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 101 [2024-11-19 09:38:11,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 86 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:11,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:11,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 101 [2024-11-19 09:38:11,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:11,329 INFO L124 PetriNetUnfolderBase]: 64/286 cut-off events. [2024-11-19 09:38:11,329 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-19 09:38:11,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 286 events. 64/286 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1262 event pairs, 63 based on Foata normal form. 2/228 useless extension candidates. Maximal degree in co-relation 434. Up to 158 conditions per place. [2024-11-19 09:38:11,330 INFO L140 encePairwiseOnDemand]: 92/101 looper letters, 27 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2024-11-19 09:38:11,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 85 transitions, 318 flow [2024-11-19 09:38:11,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:38:11,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:38:11,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 331 transitions. [2024-11-19 09:38:11,332 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6554455445544555 [2024-11-19 09:38:11,333 INFO L175 Difference]: Start difference. First operand has 91 places, 86 transitions, 240 flow. Second operand 5 states and 331 transitions. [2024-11-19 09:38:11,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 85 transitions, 318 flow [2024-11-19 09:38:11,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 85 transitions, 292 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:38:11,337 INFO L231 Difference]: Finished difference. Result has 90 places, 85 transitions, 238 flow [2024-11-19 09:38:11,337 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=238, PETRI_PLACES=90, PETRI_TRANSITIONS=85} [2024-11-19 09:38:11,337 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -13 predicate places. [2024-11-19 09:38:11,338 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 85 transitions, 238 flow [2024-11-19 09:38:11,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:11,338 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:11,338 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:38:11,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 09:38:11,341 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-19 09:38:11,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:11,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1460589232, now seen corresponding path program 1 times [2024-11-19 09:38:11,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:11,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919708956] [2024-11-19 09:38:11,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:11,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:11,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:11,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919708956] [2024-11-19 09:38:11,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919708956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:38:11,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231544347] [2024-11-19 09:38:11,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:11,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:38:11,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:38:11,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:38:11,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:38:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:11,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-19 09:38:11,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:38:12,000 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:38:12,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:38:12,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 09:38:12,101 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:38:12,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:38:12,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 09:38:12,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 09:38:12,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:38:12,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 09:38:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:12,329 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:38:12,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:38:12,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-19 09:38:12,653 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:38:12,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-19 09:38:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:12,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231544347] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:38:12,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:38:12,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 4] total 17 [2024-11-19 09:38:12,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576797216] [2024-11-19 09:38:12,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:38:12,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 09:38:12,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:12,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 09:38:12,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2024-11-19 09:38:15,654 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 101 [2024-11-19 09:38:15,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 85 transitions, 238 flow. Second operand has 19 states, 19 states have (on average 54.73684210526316) internal successors, (1040), 19 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:15,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:15,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 101 [2024-11-19 09:38:15,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:16,327 INFO L124 PetriNetUnfolderBase]: 93/386 cut-off events. [2024-11-19 09:38:16,328 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-11-19 09:38:16,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 386 events. 93/386 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1897 event pairs, 90 based on Foata normal form. 2/303 useless extension candidates. Maximal degree in co-relation 563. Up to 218 conditions per place. [2024-11-19 09:38:16,330 INFO L140 encePairwiseOnDemand]: 90/101 looper letters, 54 selfloop transitions, 16 changer transitions 0/108 dead transitions. [2024-11-19 09:38:16,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 108 transitions, 494 flow [2024-11-19 09:38:16,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 09:38:16,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 09:38:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 662 transitions. [2024-11-19 09:38:16,332 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5958595859585959 [2024-11-19 09:38:16,333 INFO L175 Difference]: Start difference. First operand has 90 places, 85 transitions, 238 flow. Second operand 11 states and 662 transitions. [2024-11-19 09:38:16,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 108 transitions, 494 flow [2024-11-19 09:38:16,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 108 transitions, 432 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:38:16,336 INFO L231 Difference]: Finished difference. Result has 100 places, 93 transitions, 320 flow [2024-11-19 09:38:16,336 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=320, PETRI_PLACES=100, PETRI_TRANSITIONS=93} [2024-11-19 09:38:16,336 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -3 predicate places. [2024-11-19 09:38:16,337 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 93 transitions, 320 flow [2024-11-19 09:38:16,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.73684210526316) internal successors, (1040), 19 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:16,337 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:16,338 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1] [2024-11-19 09:38:16,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 09:38:16,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:38:16,539 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-19 09:38:16,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:16,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1278882883, now seen corresponding path program 1 times [2024-11-19 09:38:16,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:16,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119543645] [2024-11-19 09:38:16,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:16,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 09:38:16,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:16,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119543645] [2024-11-19 09:38:16,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119543645] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:38:16,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:38:16,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:38:16,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798491904] [2024-11-19 09:38:16,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:38:16,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:38:16,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:16,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:38:16,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:38:16,864 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 101 [2024-11-19 09:38:16,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 93 transitions, 320 flow. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:16,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:16,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 101 [2024-11-19 09:38:16,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:16,956 INFO L124 PetriNetUnfolderBase]: 75/327 cut-off events. [2024-11-19 09:38:16,956 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-11-19 09:38:16,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 327 events. 75/327 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1446 event pairs, 72 based on Foata normal form. 5/281 useless extension candidates. Maximal degree in co-relation 553. Up to 214 conditions per place. [2024-11-19 09:38:16,958 INFO L140 encePairwiseOnDemand]: 94/101 looper letters, 50 selfloop transitions, 1 changer transitions 0/87 dead transitions. [2024-11-19 09:38:16,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 87 transitions, 402 flow [2024-11-19 09:38:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:38:16,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:38:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2024-11-19 09:38:16,960 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7161716171617162 [2024-11-19 09:38:16,960 INFO L175 Difference]: Start difference. First operand has 100 places, 93 transitions, 320 flow. Second operand 3 states and 217 transitions. [2024-11-19 09:38:16,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 87 transitions, 402 flow [2024-11-19 09:38:16,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 87 transitions, 382 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-19 09:38:16,962 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 282 flow [2024-11-19 09:38:16,963 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=282, PETRI_PLACES=94, PETRI_TRANSITIONS=87} [2024-11-19 09:38:16,963 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -9 predicate places. [2024-11-19 09:38:16,964 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 282 flow [2024-11-19 09:38:16,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:16,964 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:16,964 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-19 09:38:16,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 09:38:16,965 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-19 09:38:16,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:16,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1278868616, now seen corresponding path program 1 times [2024-11-19 09:38:16,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:16,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528786771] [2024-11-19 09:38:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:16,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:17,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:17,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528786771] [2024-11-19 09:38:17,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528786771] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:38:17,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445594159] [2024-11-19 09:38:17,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:17,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:38:17,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:38:17,150 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:38:17,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:38:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:17,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 09:38:17,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:38:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:17,406 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:38:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:17,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445594159] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:38:17,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:38:17,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-19 09:38:17,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755429277] [2024-11-19 09:38:17,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:38:17,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:38:17,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:17,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:38:17,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-19 09:38:17,472 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 101 [2024-11-19 09:38:17,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 87 transitions, 282 flow. Second operand has 9 states, 9 states have (on average 72.55555555555556) internal successors, (653), 9 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:17,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:17,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 101 [2024-11-19 09:38:17,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:17,673 INFO L124 PetriNetUnfolderBase]: 64/316 cut-off events. [2024-11-19 09:38:17,673 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2024-11-19 09:38:17,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 316 events. 64/316 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1134 event pairs, 63 based on Foata normal form. 4/272 useless extension candidates. Maximal degree in co-relation 591. Up to 153 conditions per place. [2024-11-19 09:38:17,675 INFO L140 encePairwiseOnDemand]: 97/101 looper letters, 61 selfloop transitions, 8 changer transitions 0/109 dead transitions. [2024-11-19 09:38:17,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 109 transitions, 516 flow [2024-11-19 09:38:17,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:38:17,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:38:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 617 transitions. [2024-11-19 09:38:17,678 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7636138613861386 [2024-11-19 09:38:17,678 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 282 flow. Second operand 8 states and 617 transitions. [2024-11-19 09:38:17,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 109 transitions, 516 flow [2024-11-19 09:38:17,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 109 transitions, 515 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:38:17,682 INFO L231 Difference]: Finished difference. Result has 103 places, 88 transitions, 317 flow [2024-11-19 09:38:17,683 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=317, PETRI_PLACES=103, PETRI_TRANSITIONS=88} [2024-11-19 09:38:17,683 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, 0 predicate places. [2024-11-19 09:38:17,684 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 88 transitions, 317 flow [2024-11-19 09:38:17,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 72.55555555555556) internal successors, (653), 9 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:17,685 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:17,685 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2024-11-19 09:38:17,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:38:17,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-19 09:38:17,886 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-19 09:38:17,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:17,887 INFO L85 PathProgramCache]: Analyzing trace with hash 717365036, now seen corresponding path program 2 times [2024-11-19 09:38:17,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:17,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247629228] [2024-11-19 09:38:17,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:38:17,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:18,086 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:38:18,087 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:38:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:19,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:19,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247629228] [2024-11-19 09:38:19,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247629228] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:38:19,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585812088] [2024-11-19 09:38:19,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:38:19,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:38:19,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:38:19,546 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:38:19,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:38:19,834 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:38:19,834 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:38:19,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-11-19 09:38:19,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:38:19,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:38:19,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 09:38:19,942 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:38:19,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:38:19,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 09:38:20,092 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:38:20,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-19 09:38:20,109 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:38:20,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:38:20,192 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:38:20,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:38:20,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 09:38:20,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 09:38:20,407 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:38:20,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-19 09:38:20,426 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:38:20,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:38:20,524 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:38:20,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-19 09:38:20,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-19 09:38:20,552 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:38:20,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:38:20,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:38:20,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 09:38:20,917 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:38:20,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:38:20,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 09:38:21,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:38:21,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 09:38:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:21,140 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:38:21,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:38:21,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-19 09:38:21,443 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:38:21,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-19 09:38:21,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:38:21,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-19 09:38:21,749 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:38:21,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-19 09:38:21,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:38:21,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-19 09:38:22,072 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:38:22,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-19 09:38:22,303 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:38:22,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-19 09:38:22,411 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:38:22,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-19 09:38:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:22,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585812088] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:38:22,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:38:22,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 10] total 47 [2024-11-19 09:38:22,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457638933] [2024-11-19 09:38:22,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:38:22,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-19 09:38:22,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:22,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-19 09:38:22,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1965, Unknown=0, NotChecked=0, Total=2352 [2024-11-19 09:38:35,774 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 101 [2024-11-19 09:38:35,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 88 transitions, 317 flow. Second operand has 49 states, 49 states have (on average 54.95918367346939) internal successors, (2693), 49 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:35,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:35,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 101 [2024-11-19 09:38:35,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:37,575 INFO L124 PetriNetUnfolderBase]: 77/389 cut-off events. [2024-11-19 09:38:37,575 INFO L125 PetriNetUnfolderBase]: For 263/263 co-relation queries the response was YES. [2024-11-19 09:38:37,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 389 events. 77/389 cut-off events. For 263/263 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1508 event pairs, 72 based on Foata normal form. 6/344 useless extension candidates. Maximal degree in co-relation 815. Up to 179 conditions per place. [2024-11-19 09:38:37,577 INFO L140 encePairwiseOnDemand]: 93/101 looper letters, 73 selfloop transitions, 32 changer transitions 0/143 dead transitions. [2024-11-19 09:38:37,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 143 transitions, 861 flow [2024-11-19 09:38:37,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-19 09:38:37,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-19 09:38:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1383 transitions. [2024-11-19 09:38:37,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5705445544554455 [2024-11-19 09:38:37,582 INFO L175 Difference]: Start difference. First operand has 103 places, 88 transitions, 317 flow. Second operand 24 states and 1383 transitions. [2024-11-19 09:38:37,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 143 transitions, 861 flow [2024-11-19 09:38:37,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 143 transitions, 845 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-19 09:38:37,587 INFO L231 Difference]: Finished difference. Result has 135 places, 104 transitions, 583 flow [2024-11-19 09:38:37,587 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=583, PETRI_PLACES=135, PETRI_TRANSITIONS=104} [2024-11-19 09:38:37,587 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, 32 predicate places. [2024-11-19 09:38:37,587 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 104 transitions, 583 flow [2024-11-19 09:38:37,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 54.95918367346939) internal successors, (2693), 49 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:37,589 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:37,589 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2024-11-19 09:38:37,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 09:38:37,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:38:37,794 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-19 09:38:37,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:37,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1160819112, now seen corresponding path program 2 times [2024-11-19 09:38:37,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:37,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710923303] [2024-11-19 09:38:37,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:38:37,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:37,891 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:38:37,892 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:38:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:38,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:38,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710923303] [2024-11-19 09:38:38,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710923303] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:38:38,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149878349] [2024-11-19 09:38:38,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:38:38,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:38:38,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:38:38,284 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:38:38,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:38:38,654 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:38:38,654 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:38:38,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:38:38,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:38:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:38,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:38:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:38,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149878349] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:38:38,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:38:38,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-19 09:38:38,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178158734] [2024-11-19 09:38:38,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:38:38,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:38:38,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:38,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:38:38,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:38:38,877 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 101 [2024-11-19 09:38:38,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 104 transitions, 583 flow. Second operand has 13 states, 13 states have (on average 73.84615384615384) internal successors, (960), 13 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:38,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:38,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 101 [2024-11-19 09:38:38,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:39,081 INFO L124 PetriNetUnfolderBase]: 64/358 cut-off events. [2024-11-19 09:38:39,082 INFO L125 PetriNetUnfolderBase]: For 531/531 co-relation queries the response was YES. [2024-11-19 09:38:39,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 358 events. 64/358 cut-off events. For 531/531 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1146 event pairs, 63 based on Foata normal form. 4/314 useless extension candidates. Maximal degree in co-relation 821. Up to 153 conditions per place. [2024-11-19 09:38:39,085 INFO L140 encePairwiseOnDemand]: 97/101 looper letters, 86 selfloop transitions, 12 changer transitions 0/138 dead transitions. [2024-11-19 09:38:39,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 138 transitions, 953 flow [2024-11-19 09:38:39,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 09:38:39,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 09:38:39,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 917 transitions. [2024-11-19 09:38:39,088 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7566006600660066 [2024-11-19 09:38:39,088 INFO L175 Difference]: Start difference. First operand has 135 places, 104 transitions, 583 flow. Second operand 12 states and 917 transitions. [2024-11-19 09:38:39,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 138 transitions, 953 flow [2024-11-19 09:38:39,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 138 transitions, 862 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-11-19 09:38:39,094 INFO L231 Difference]: Finished difference. Result has 137 places, 101 transitions, 478 flow [2024-11-19 09:38:39,094 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=478, PETRI_PLACES=137, PETRI_TRANSITIONS=101} [2024-11-19 09:38:39,096 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, 34 predicate places. [2024-11-19 09:38:39,096 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 101 transitions, 478 flow [2024-11-19 09:38:39,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 73.84615384615384) internal successors, (960), 13 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:39,098 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:39,098 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1] [2024-11-19 09:38:39,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:38:39,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:38:39,298 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-19 09:38:39,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:39,299 INFO L85 PathProgramCache]: Analyzing trace with hash 539150308, now seen corresponding path program 3 times [2024-11-19 09:38:39,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:39,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759678406] [2024-11-19 09:38:39,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:38:39,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:40,397 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-19 09:38:40,397 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:38:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 399 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:40,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:40,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759678406] [2024-11-19 09:38:40,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759678406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:38:40,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486442554] [2024-11-19 09:38:40,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:38:40,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:38:40,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:38:40,963 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:38:40,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process