./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/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 fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/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-wip.dd.update-z3-fca748b-m [2024-11-20 17:33:06,879 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:33:06,968 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:33:06,972 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:33:06,974 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:33:07,009 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:33:07,011 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:33:07,011 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:33:07,012 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:33:07,014 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:33:07,014 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:33:07,015 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:33:07,015 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:33:07,016 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:33:07,017 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:33:07,018 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:33:07,018 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:33:07,020 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:33:07,021 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:33:07,021 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:33:07,021 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:33:07,022 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:33:07,022 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:33:07,022 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:33:07,023 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:33:07,023 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:33:07,023 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:33:07,023 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:33:07,024 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:33:07,024 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:33:07,024 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:33:07,024 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:33:07,025 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:33:07,025 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:33:07,025 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:33:07,026 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:33:07,026 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:33:07,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:33:07,027 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:33:07,027 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:33:07,027 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:33:07,028 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:33:07,028 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 034172cc4904075fab6f792587170b7236be9fb41f3a62fa7fbe9a216ec4ca2c [2024-11-20 17:33:07,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:33:07,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:33:07,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:33:07,326 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:33:07,326 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:33:07,328 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i [2024-11-20 17:33:08,869 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:33:09,139 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:33:09,140 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i [2024-11-20 17:33:09,165 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3ea41d7d/dd7341ac2c6d4bcbb06b2b06f1230538/FLAG03fd4fb9c [2024-11-20 17:33:09,177 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3ea41d7d/dd7341ac2c6d4bcbb06b2b06f1230538 [2024-11-20 17:33:09,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:33:09,181 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:33:09,184 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:33:09,185 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:33:09,189 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:33:09,190 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:33:09" (1/1) ... [2024-11-20 17:33:09,190 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72b446d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:09, skipping insertion in model container [2024-11-20 17:33:09,191 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:33:09" (1/1) ... [2024-11-20 17:33:09,257 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:33:09,850 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:33:09,908 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:33:09,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:33:10,149 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:33:10,150 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:10 WrapperNode [2024-11-20 17:33:10,150 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:33:10,151 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:33:10,152 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:33:10,152 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:33:10,160 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:10" (1/1) ... [2024-11-20 17:33:10,195 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:10" (1/1) ... [2024-11-20 17:33:10,251 INFO L138 Inliner]: procedures = 372, calls = 94, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 218 [2024-11-20 17:33:10,252 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:33:10,253 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:33:10,253 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:33:10,253 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:33:10,265 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:10" (1/1) ... [2024-11-20 17:33:10,265 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:10" (1/1) ... [2024-11-20 17:33:10,275 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:10" (1/1) ... [2024-11-20 17:33:10,315 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]. [2024-11-20 17:33:10,317 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:10" (1/1) ... [2024-11-20 17:33:10,317 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:10" (1/1) ... [2024-11-20 17:33:10,339 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:10" (1/1) ... [2024-11-20 17:33:10,344 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:10" (1/1) ... [2024-11-20 17:33:10,346 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:10" (1/1) ... [2024-11-20 17:33:10,352 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:10" (1/1) ... [2024-11-20 17:33:10,360 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:33:10,365 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:33:10,365 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:33:10,365 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:33:10,366 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:10" (1/1) ... [2024-11-20 17:33:10,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:33:10,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:33:10,410 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 17:33:10,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 17:33:10,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-20 17:33:10,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-20 17:33:10,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-20 17:33:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-20 17:33:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-20 17:33:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-20 17:33:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-20 17:33:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:33:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:33:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-20 17:33:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:33:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:33:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-20 17:33:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-20 17:33:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:33:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:33:10,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-20 17:33:10,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-20 17:33:10,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-20 17:33:10,467 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-20 17:33:10,467 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-20 17:33:10,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:33:10,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:33:10,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-20 17:33:10,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:33:10,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:33:10,471 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:33:10,664 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:33:10,667 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:33:11,313 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:33:11,314 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:33:11,815 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:33:11,815 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-20 17:33:11,816 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:33:11 BoogieIcfgContainer [2024-11-20 17:33:11,816 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:33:11,819 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:33:11,819 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:33:11,822 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:33:11,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:33:09" (1/3) ... [2024-11-20 17:33:11,823 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4832fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:33:11, skipping insertion in model container [2024-11-20 17:33:11,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:10" (2/3) ... [2024-11-20 17:33:11,824 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4832fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:33:11, skipping insertion in model container [2024-11-20 17:33:11,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:33:11" (3/3) ... [2024-11-20 17:33:11,827 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_12-arraycollapse_rc.i [2024-11-20 17:33:11,847 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:33:11,848 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2024-11-20 17:33:11,848 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:33:11,919 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 17:33:11,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 101 transitions, 206 flow [2024-11-20 17:33:12,019 INFO L124 PetriNetUnfolderBase]: 1/100 cut-off events. [2024-11-20 17:33:12,019 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:33:12,022 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. [2024-11-20 17:33:12,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 101 transitions, 206 flow [2024-11-20 17:33:12,027 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 100 transitions, 203 flow [2024-11-20 17:33:12,040 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:33:12,049 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;@22e2a0a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:33:12,049 INFO L334 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2024-11-20 17:33:12,055 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:33:12,055 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-20 17:33:12,055 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:33:12,055 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:33:12,057 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:33:12,057 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)] === [2024-11-20 17:33:12,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:33:12,063 INFO L85 PathProgramCache]: Analyzing trace with hash 625045, now seen corresponding path program 1 times [2024-11-20 17:33:12,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:33:12,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772920407] [2024-11-20 17:33:12,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:33:12,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:33:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:33:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:12,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:33:12,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772920407] [2024-11-20 17:33:12,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772920407] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:33:12,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:33:12,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:33:12,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013085252] [2024-11-20 17:33:12,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:33:12,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:33:12,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:33:12,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:33:12,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:33:12,610 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 101 [2024-11-20 17:33:12,613 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) [2024-11-20 17:33:12,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:33:12,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 101 [2024-11-20 17:33:12,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:33:12,783 INFO L124 PetriNetUnfolderBase]: 64/290 cut-off events. [2024-11-20 17:33:12,783 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:33:12,785 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. [2024-11-20 17:33:12,791 INFO L140 encePairwiseOnDemand]: 89/101 looper letters, 30 selfloop transitions, 6 changer transitions 0/94 dead transitions. [2024-11-20 17:33:12,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 94 transitions, 263 flow [2024-11-20 17:33:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:33:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:33:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2024-11-20 17:33:12,804 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7227722772277227 [2024-11-20 17:33:12,806 INFO L175 Difference]: Start difference. First operand has 103 places, 100 transitions, 203 flow. Second operand 3 states and 219 transitions. [2024-11-20 17:33:12,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 94 transitions, 263 flow [2024-11-20 17:33:12,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 94 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:33:12,815 INFO L231 Difference]: Finished difference. Result has 98 places, 94 transitions, 202 flow [2024-11-20 17:33:12,817 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} [2024-11-20 17:33:12,821 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2024-11-20 17:33:12,822 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 94 transitions, 202 flow [2024-11-20 17:33:12,822 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) [2024-11-20 17:33:12,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:33:12,822 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:33:12,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:33:12,823 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)] === [2024-11-20 17:33:12,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:33:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash 625046, now seen corresponding path program 1 times [2024-11-20 17:33:12,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:33:12,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417158020] [2024-11-20 17:33:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:33:12,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:33:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:33:13,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:13,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:33:13,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417158020] [2024-11-20 17:33:13,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417158020] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:33:13,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:33:13,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:33:13,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555927877] [2024-11-20 17:33:13,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:33:13,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:33:13,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:33:13,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:33:13,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:33:13,113 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2024-11-20 17:33:13,114 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) [2024-11-20 17:33:13,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:33:13,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2024-11-20 17:33:13,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:33:13,255 INFO L124 PetriNetUnfolderBase]: 64/284 cut-off events. [2024-11-20 17:33:13,255 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 17:33:13,256 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. [2024-11-20 17:33:13,258 INFO L140 encePairwiseOnDemand]: 89/101 looper letters, 27 selfloop transitions, 6 changer transitions 0/88 dead transitions. [2024-11-20 17:33:13,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 88 transitions, 256 flow [2024-11-20 17:33:13,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:33:13,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:33:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2024-11-20 17:33:13,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7425742574257426 [2024-11-20 17:33:13,261 INFO L175 Difference]: Start difference. First operand has 98 places, 94 transitions, 202 flow. Second operand 3 states and 225 transitions. [2024-11-20 17:33:13,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 88 transitions, 256 flow [2024-11-20 17:33:13,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 88 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:33:13,266 INFO L231 Difference]: Finished difference. Result has 92 places, 88 transitions, 190 flow [2024-11-20 17:33:13,267 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} [2024-11-20 17:33:13,267 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -11 predicate places. [2024-11-20 17:33:13,267 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 88 transitions, 190 flow [2024-11-20 17:33:13,268 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) [2024-11-20 17:33:13,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:33:13,269 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-20 17:33:13,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:33:13,269 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)] === [2024-11-20 17:33:13,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:33:13,269 INFO L85 PathProgramCache]: Analyzing trace with hash 600687964, now seen corresponding path program 1 times [2024-11-20 17:33:13,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:33:13,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468100468] [2024-11-20 17:33:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:33:13,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:33:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:33:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:13,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:33:13,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468100468] [2024-11-20 17:33:13,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468100468] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:33:13,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:33:13,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:33:13,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036707377] [2024-11-20 17:33:13,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:33:13,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:33:13,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:33:13,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:33:13,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:33:13,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 101 [2024-11-20 17:33:13,786 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) [2024-11-20 17:33:13,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:33:13,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 101 [2024-11-20 17:33:13,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:33:14,019 INFO L124 PetriNetUnfolderBase]: 81/343 cut-off events. [2024-11-20 17:33:14,019 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-20 17:33:14,020 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. [2024-11-20 17:33:14,022 INFO L140 encePairwiseOnDemand]: 90/101 looper letters, 42 selfloop transitions, 6 changer transitions 0/95 dead transitions. [2024-11-20 17:33:14,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 95 transitions, 308 flow [2024-11-20 17:33:14,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:33:14,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:33:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 269 transitions. [2024-11-20 17:33:14,025 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6658415841584159 [2024-11-20 17:33:14,025 INFO L175 Difference]: Start difference. First operand has 92 places, 88 transitions, 190 flow. Second operand 4 states and 269 transitions. [2024-11-20 17:33:14,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 95 transitions, 308 flow [2024-11-20 17:33:14,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 95 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:33:14,031 INFO L231 Difference]: Finished difference. Result has 95 places, 93 transitions, 230 flow [2024-11-20 17:33:14,032 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} [2024-11-20 17:33:14,032 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -8 predicate places. [2024-11-20 17:33:14,032 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 93 transitions, 230 flow [2024-11-20 17:33:14,033 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) [2024-11-20 17:33:14,033 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:33:14,033 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:33:14,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 17:33:14,033 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)] === [2024-11-20 17:33:14,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:33:14,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1402588596, now seen corresponding path program 1 times [2024-11-20 17:33:14,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:33:14,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414848381] [2024-11-20 17:33:14,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:33:14,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:33:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:33:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:14,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:33:14,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414848381] [2024-11-20 17:33:14,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414848381] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:33:14,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:33:14,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 17:33:14,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776545424] [2024-11-20 17:33:14,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:33:14,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:33:14,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:33:14,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:33:14,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:33:14,732 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 101 [2024-11-20 17:33:14,733 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) [2024-11-20 17:33:14,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:33:14,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 101 [2024-11-20 17:33:14,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:33:14,976 INFO L124 PetriNetUnfolderBase]: 64/294 cut-off events. [2024-11-20 17:33:14,976 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 17:33:14,978 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. [2024-11-20 17:33:14,982 INFO L140 encePairwiseOnDemand]: 85/101 looper letters, 29 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-11-20 17:33:14,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 89 transitions, 314 flow [2024-11-20 17:33:14,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:33:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:33:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 445 transitions. [2024-11-20 17:33:14,986 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5507425742574258 [2024-11-20 17:33:14,986 INFO L175 Difference]: Start difference. First operand has 95 places, 93 transitions, 230 flow. Second operand 8 states and 445 transitions. [2024-11-20 17:33:14,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 89 transitions, 314 flow [2024-11-20 17:33:14,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 89 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:33:14,992 INFO L231 Difference]: Finished difference. Result has 97 places, 89 transitions, 254 flow [2024-11-20 17:33:14,993 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} [2024-11-20 17:33:14,994 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -6 predicate places. [2024-11-20 17:33:14,995 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 89 transitions, 254 flow [2024-11-20 17:33:14,995 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) [2024-11-20 17:33:14,995 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:33:14,996 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:33:14,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 17:33:14,997 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)] === [2024-11-20 17:33:14,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:33:14,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1402588597, now seen corresponding path program 1 times [2024-11-20 17:33:14,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:33:14,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152100836] [2024-11-20 17:33:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:33:14,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:33:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:33:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:15,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:33:15,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152100836] [2024-11-20 17:33:15,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152100836] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:33:15,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:33:15,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 17:33:15,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286342803] [2024-11-20 17:33:15,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:33:15,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:33:15,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:33:15,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:33:15,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:33:15,997 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 101 [2024-11-20 17:33:15,998 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) [2024-11-20 17:33:15,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:33:15,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 101 [2024-11-20 17:33:15,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:33:16,206 INFO L124 PetriNetUnfolderBase]: 64/290 cut-off events. [2024-11-20 17:33:16,206 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-20 17:33:16,209 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. [2024-11-20 17:33:16,210 INFO L140 encePairwiseOnDemand]: 91/101 looper letters, 32 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2024-11-20 17:33:16,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 87 transitions, 340 flow [2024-11-20 17:33:16,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:33:16,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:33:16,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 371 transitions. [2024-11-20 17:33:16,212 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5247524752475248 [2024-11-20 17:33:16,213 INFO L175 Difference]: Start difference. First operand has 97 places, 89 transitions, 254 flow. Second operand 7 states and 371 transitions. [2024-11-20 17:33:16,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 87 transitions, 340 flow [2024-11-20 17:33:16,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 87 transitions, 306 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-20 17:33:16,216 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 242 flow [2024-11-20 17:33:16,216 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} [2024-11-20 17:33:16,217 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -9 predicate places. [2024-11-20 17:33:16,217 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 242 flow [2024-11-20 17:33:16,217 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) [2024-11-20 17:33:16,218 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:33:16,218 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:33:16,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 17:33:16,218 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)] === [2024-11-20 17:33:16,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:33:16,219 INFO L85 PathProgramCache]: Analyzing trace with hash -732068759, now seen corresponding path program 1 times [2024-11-20 17:33:16,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:33:16,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760111602] [2024-11-20 17:33:16,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:33:16,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:33:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:33:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:16,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:33:16,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760111602] [2024-11-20 17:33:16,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760111602] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:33:16,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:33:16,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:33:16,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63903590] [2024-11-20 17:33:16,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:33:16,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:33:16,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:33:16,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:33:16,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:33:16,497 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 101 [2024-11-20 17:33:16,498 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) [2024-11-20 17:33:16,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:33:16,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 101 [2024-11-20 17:33:16,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:33:16,634 INFO L124 PetriNetUnfolderBase]: 64/288 cut-off events. [2024-11-20 17:33:16,634 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-20 17:33:16,635 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. [2024-11-20 17:33:16,636 INFO L140 encePairwiseOnDemand]: 92/101 looper letters, 30 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2024-11-20 17:33:16,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 86 transitions, 326 flow [2024-11-20 17:33:16,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:33:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:33:16,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 319 transitions. [2024-11-20 17:33:16,638 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6316831683168317 [2024-11-20 17:33:16,638 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 242 flow. Second operand 5 states and 319 transitions. [2024-11-20 17:33:16,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 86 transitions, 326 flow [2024-11-20 17:33:16,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 86 transitions, 300 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:33:16,641 INFO L231 Difference]: Finished difference. Result has 91 places, 86 transitions, 240 flow [2024-11-20 17:33:16,641 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} [2024-11-20 17:33:16,642 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -12 predicate places. [2024-11-20 17:33:16,642 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 86 transitions, 240 flow [2024-11-20 17:33:16,642 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) [2024-11-20 17:33:16,642 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:33:16,643 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:33:16,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 17:33:16,643 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)] === [2024-11-20 17:33:16,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:33:16,643 INFO L85 PathProgramCache]: Analyzing trace with hash -732068758, now seen corresponding path program 1 times [2024-11-20 17:33:16,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:33:16,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122360048] [2024-11-20 17:33:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:33:16,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:33:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:33:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:16,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:33:16,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122360048] [2024-11-20 17:33:16,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122360048] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:33:16,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:33:16,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:33:16,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584605801] [2024-11-20 17:33:16,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:33:16,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:33:16,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:33:16,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:33:16,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:33:17,019 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 101 [2024-11-20 17:33:17,020 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) [2024-11-20 17:33:17,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:33:17,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 101 [2024-11-20 17:33:17,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:33:17,163 INFO L124 PetriNetUnfolderBase]: 64/286 cut-off events. [2024-11-20 17:33:17,163 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-20 17:33:17,164 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. [2024-11-20 17:33:17,165 INFO L140 encePairwiseOnDemand]: 92/101 looper letters, 27 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2024-11-20 17:33:17,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 85 transitions, 318 flow [2024-11-20 17:33:17,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:33:17,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:33:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 331 transitions. [2024-11-20 17:33:17,167 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6554455445544555 [2024-11-20 17:33:17,167 INFO L175 Difference]: Start difference. First operand has 91 places, 86 transitions, 240 flow. Second operand 5 states and 331 transitions. [2024-11-20 17:33:17,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 85 transitions, 318 flow [2024-11-20 17:33:17,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 85 transitions, 292 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:33:17,169 INFO L231 Difference]: Finished difference. Result has 90 places, 85 transitions, 238 flow [2024-11-20 17:33:17,170 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} [2024-11-20 17:33:17,170 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -13 predicate places. [2024-11-20 17:33:17,171 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 85 transitions, 238 flow [2024-11-20 17:33:17,171 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) [2024-11-20 17:33:17,171 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:33:17,171 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:33:17,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 17:33:17,172 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)] === [2024-11-20 17:33:17,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:33:17,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1460589232, now seen corresponding path program 1 times [2024-11-20 17:33:17,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:33:17,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475257914] [2024-11-20 17:33:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:33:17,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:33:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:33:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:17,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:33:17,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475257914] [2024-11-20 17:33:17,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475257914] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:33:17,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410101785] [2024-11-20 17:33:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:33:17,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:33:17,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:33:17,579 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:33:17,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:33:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:33:17,752 INFO L255 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-20 17:33:17,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:33:17,884 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:33:17,885 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 [2024-11-20 17:33:17,898 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 [2024-11-20 17:33:17,984 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:33:17,985 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 [2024-11-20 17:33:17,996 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 [2024-11-20 17:33:18,009 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 [2024-11-20 17:33:18,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:33:18,178 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 [2024-11-20 17:33:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:18,222 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:33:18,461 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:33:18,462 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 [2024-11-20 17:33:18,537 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 17:33:18,538 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 [2024-11-20 17:33:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:18,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410101785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:33:18,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:33:18,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 4] total 17 [2024-11-20 17:33:18,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673100943] [2024-11-20 17:33:18,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:33:18,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 17:33:18,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:33:18,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 17:33:18,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2024-11-20 17:33:22,031 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 101 [2024-11-20 17:33:22,032 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) [2024-11-20 17:33:22,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:33:22,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 101 [2024-11-20 17:33:22,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:33:22,735 INFO L124 PetriNetUnfolderBase]: 93/386 cut-off events. [2024-11-20 17:33:22,735 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-11-20 17:33:22,736 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. [2024-11-20 17:33:22,738 INFO L140 encePairwiseOnDemand]: 90/101 looper letters, 54 selfloop transitions, 16 changer transitions 0/108 dead transitions. [2024-11-20 17:33:22,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 108 transitions, 494 flow [2024-11-20 17:33:22,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 17:33:22,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-20 17:33:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 662 transitions. [2024-11-20 17:33:22,740 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5958595859585959 [2024-11-20 17:33:22,740 INFO L175 Difference]: Start difference. First operand has 90 places, 85 transitions, 238 flow. Second operand 11 states and 662 transitions. [2024-11-20 17:33:22,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 108 transitions, 494 flow [2024-11-20 17:33:22,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 108 transitions, 432 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:33:22,745 INFO L231 Difference]: Finished difference. Result has 100 places, 93 transitions, 320 flow [2024-11-20 17:33:22,746 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} [2024-11-20 17:33:22,746 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -3 predicate places. [2024-11-20 17:33:22,746 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 93 transitions, 320 flow [2024-11-20 17:33:22,748 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) [2024-11-20 17:33:22,749 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:33:22,749 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1] [2024-11-20 17:33:22,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-20 17:33:22,949 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 [2024-11-20 17:33:22,950 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)] === [2024-11-20 17:33:22,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:33:22,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1278882883, now seen corresponding path program 1 times [2024-11-20 17:33:22,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:33:22,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391575600] [2024-11-20 17:33:22,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:33:22,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:33:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:33:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-20 17:33:23,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:33:23,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391575600] [2024-11-20 17:33:23,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391575600] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:33:23,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:33:23,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:33:23,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990710235] [2024-11-20 17:33:23,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:33:23,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:33:23,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:33:23,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:33:23,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:33:23,302 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 101 [2024-11-20 17:33:23,303 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) [2024-11-20 17:33:23,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:33:23,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 101 [2024-11-20 17:33:23,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:33:23,411 INFO L124 PetriNetUnfolderBase]: 75/327 cut-off events. [2024-11-20 17:33:23,411 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-11-20 17:33:23,412 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. [2024-11-20 17:33:23,413 INFO L140 encePairwiseOnDemand]: 94/101 looper letters, 50 selfloop transitions, 1 changer transitions 0/87 dead transitions. [2024-11-20 17:33:23,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 87 transitions, 402 flow [2024-11-20 17:33:23,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:33:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:33:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2024-11-20 17:33:23,415 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7161716171617162 [2024-11-20 17:33:23,415 INFO L175 Difference]: Start difference. First operand has 100 places, 93 transitions, 320 flow. Second operand 3 states and 217 transitions. [2024-11-20 17:33:23,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 87 transitions, 402 flow [2024-11-20 17:33:23,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 87 transitions, 382 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-20 17:33:23,417 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 282 flow [2024-11-20 17:33:23,417 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} [2024-11-20 17:33:23,418 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -9 predicate places. [2024-11-20 17:33:23,418 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 282 flow [2024-11-20 17:33:23,418 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) [2024-11-20 17:33:23,419 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:33:23,419 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-20 17:33:23,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 17:33:23,419 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)] === [2024-11-20 17:33:23,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:33:23,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1278868616, now seen corresponding path program 1 times [2024-11-20 17:33:23,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:33:23,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146436695] [2024-11-20 17:33:23,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:33:23,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:33:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:33:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:23,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:33:23,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146436695] [2024-11-20 17:33:23,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146436695] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:33:23,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708469800] [2024-11-20 17:33:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:33:23,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:33:23,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:33:23,584 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) [2024-11-20 17:33:23,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:33:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:33:23,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-20 17:33:23,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:33:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:23,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:33:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:23,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708469800] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:33:23,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:33:23,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-20 17:33:23,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964223402] [2024-11-20 17:33:23,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:33:23,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 17:33:23,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:33:23,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 17:33:23,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-20 17:33:23,899 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 101 [2024-11-20 17:33:23,900 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) [2024-11-20 17:33:23,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:33:23,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 101 [2024-11-20 17:33:23,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:33:24,121 INFO L124 PetriNetUnfolderBase]: 64/316 cut-off events. [2024-11-20 17:33:24,121 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2024-11-20 17:33:24,122 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. [2024-11-20 17:33:24,123 INFO L140 encePairwiseOnDemand]: 97/101 looper letters, 61 selfloop transitions, 8 changer transitions 0/109 dead transitions. [2024-11-20 17:33:24,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 109 transitions, 516 flow [2024-11-20 17:33:24,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:33:24,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:33:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 617 transitions. [2024-11-20 17:33:24,126 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7636138613861386 [2024-11-20 17:33:24,126 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 282 flow. Second operand 8 states and 617 transitions. [2024-11-20 17:33:24,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 109 transitions, 516 flow [2024-11-20 17:33:24,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 109 transitions, 515 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:33:24,129 INFO L231 Difference]: Finished difference. Result has 103 places, 88 transitions, 317 flow [2024-11-20 17:33:24,130 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} [2024-11-20 17:33:24,130 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, 0 predicate places. [2024-11-20 17:33:24,130 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 88 transitions, 317 flow [2024-11-20 17:33:24,131 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) [2024-11-20 17:33:24,131 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:33:24,131 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2024-11-20 17:33:24,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-20 17:33:24,331 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 [2024-11-20 17:33:24,332 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)] === [2024-11-20 17:33:24,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:33:24,332 INFO L85 PathProgramCache]: Analyzing trace with hash 717365036, now seen corresponding path program 2 times [2024-11-20 17:33:24,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:33:24,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833939613] [2024-11-20 17:33:24,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:33:24,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:33:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:33:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:26,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:33:26,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833939613] [2024-11-20 17:33:26,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833939613] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:33:26,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318511551] [2024-11-20 17:33:26,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:33:26,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:33:26,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:33:26,057 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) [2024-11-20 17:33:26,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:33:26,342 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:33:26,342 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:33:26,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-11-20 17:33:26,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:33:26,409 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:33:26,410 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 [2024-11-20 17:33:26,426 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:33:26,426 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 [2024-11-20 17:33:26,530 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:33:26,530 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 [2024-11-20 17:33:26,537 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 [2024-11-20 17:33:26,547 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 [2024-11-20 17:33:26,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:33:26,710 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 [2024-11-20 17:33:26,766 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:33:26,766 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 [2024-11-20 17:33:26,774 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 [2024-11-20 17:33:26,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:33:26,943 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 [2024-11-20 17:33:26,997 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:33:26,998 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 [2024-11-20 17:33:27,017 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:33:27,018 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 [2024-11-20 17:33:27,184 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:33:27,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:33:27,193 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 [2024-11-20 17:33:27,281 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:33:27,282 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 [2024-11-20 17:33:27,292 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 [2024-11-20 17:33:27,299 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 [2024-11-20 17:33:27,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:33:27,470 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 [2024-11-20 17:33:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:27,513 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:33:27,763 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:33:27,764 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 [2024-11-20 17:33:27,847 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 17:33:27,847 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 [2024-11-20 17:33:28,072 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:33:28,072 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 [2024-11-20 17:33:28,157 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 17:33:28,158 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 [2024-11-20 17:33:28,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:33:28,381 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 [2024-11-20 17:33:28,474 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 17:33:28,475 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 [2024-11-20 17:33:28,698 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:33:28,699 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 [2024-11-20 17:33:28,814 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 17:33:28,814 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 [2024-11-20 17:33:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:28,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318511551] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:33:28,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:33:28,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 10] total 43 [2024-11-20 17:33:28,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957575286] [2024-11-20 17:33:28,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:33:28,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-20 17:33:28,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:33:28,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-20 17:33:28,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1634, Unknown=0, NotChecked=0, Total=1980 [2024-11-20 17:33:41,125 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 101 [2024-11-20 17:33:41,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 88 transitions, 317 flow. Second operand has 45 states, 45 states have (on average 55.13333333333333) internal successors, (2481), 45 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:33:41,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:33:41,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 101 [2024-11-20 17:33:41,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:33:42,561 INFO L124 PetriNetUnfolderBase]: 77/389 cut-off events. [2024-11-20 17:33:42,561 INFO L125 PetriNetUnfolderBase]: For 263/263 co-relation queries the response was YES. [2024-11-20 17:33:42,562 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. [2024-11-20 17:33:42,563 INFO L140 encePairwiseOnDemand]: 93/101 looper letters, 73 selfloop transitions, 32 changer transitions 0/143 dead transitions. [2024-11-20 17:33:42,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 143 transitions, 861 flow [2024-11-20 17:33:42,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-20 17:33:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-20 17:33:42,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1383 transitions. [2024-11-20 17:33:42,568 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5705445544554455 [2024-11-20 17:33:42,568 INFO L175 Difference]: Start difference. First operand has 103 places, 88 transitions, 317 flow. Second operand 24 states and 1383 transitions. [2024-11-20 17:33:42,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 143 transitions, 861 flow [2024-11-20 17:33:42,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 143 transitions, 845 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-20 17:33:42,573 INFO L231 Difference]: Finished difference. Result has 135 places, 104 transitions, 583 flow [2024-11-20 17:33:42,573 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} [2024-11-20 17:33:42,573 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, 32 predicate places. [2024-11-20 17:33:42,573 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 104 transitions, 583 flow [2024-11-20 17:33:42,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 55.13333333333333) internal successors, (2481), 45 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:33:42,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:33:42,575 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2024-11-20 17:33:42,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 17:33:42,775 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 [2024-11-20 17:33:42,775 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)] === [2024-11-20 17:33:42,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:33:42,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1160819112, now seen corresponding path program 2 times [2024-11-20 17:33:42,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:33:42,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435575775] [2024-11-20 17:33:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:33:42,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:33:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:33:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:43,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:33:43,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435575775] [2024-11-20 17:33:43,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435575775] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:33:43,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082526228] [2024-11-20 17:33:43,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:33:43,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:33:43,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:33:43,194 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) [2024-11-20 17:33:43,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 17:33:43,588 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:33:43,588 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:33:43,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:33:43,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:33:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:43,682 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:33:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:43,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082526228] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:33:43,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:33:43,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-20 17:33:43,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328305992] [2024-11-20 17:33:43,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:33:43,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:33:43,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:33:43,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:33:43,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:33:43,804 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 101 [2024-11-20 17:33:43,804 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) [2024-11-20 17:33:43,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:33:43,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 101 [2024-11-20 17:33:43,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:33:43,993 INFO L124 PetriNetUnfolderBase]: 64/358 cut-off events. [2024-11-20 17:33:43,993 INFO L125 PetriNetUnfolderBase]: For 531/531 co-relation queries the response was YES. [2024-11-20 17:33:43,994 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. [2024-11-20 17:33:43,996 INFO L140 encePairwiseOnDemand]: 97/101 looper letters, 86 selfloop transitions, 12 changer transitions 0/138 dead transitions. [2024-11-20 17:33:43,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 138 transitions, 953 flow [2024-11-20 17:33:43,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 17:33:43,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 17:33:43,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 917 transitions. [2024-11-20 17:33:44,000 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7566006600660066 [2024-11-20 17:33:44,000 INFO L175 Difference]: Start difference. First operand has 135 places, 104 transitions, 583 flow. Second operand 12 states and 917 transitions. [2024-11-20 17:33:44,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 138 transitions, 953 flow [2024-11-20 17:33:44,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 138 transitions, 862 flow, removed 24 selfloop flow, removed 12 redundant places. [2024-11-20 17:33:44,009 INFO L231 Difference]: Finished difference. Result has 135 places, 101 transitions, 478 flow [2024-11-20 17:33:44,010 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=123, 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=135, PETRI_TRANSITIONS=101} [2024-11-20 17:33:44,010 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, 32 predicate places. [2024-11-20 17:33:44,011 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 101 transitions, 478 flow [2024-11-20 17:33:44,012 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) [2024-11-20 17:33:44,012 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:33:44,012 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1] [2024-11-20 17:33:44,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 17:33:44,214 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 [2024-11-20 17:33:44,214 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)] === [2024-11-20 17:33:44,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:33:44,215 INFO L85 PathProgramCache]: Analyzing trace with hash 539150308, now seen corresponding path program 3 times [2024-11-20 17:33:44,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:33:44,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999068454] [2024-11-20 17:33:44,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:33:44,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:33:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:33:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 399 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:33:45,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:33:45,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999068454] [2024-11-20 17:33:45,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999068454] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:33:45,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872773951] [2024-11-20 17:33:45,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:33:45,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:33:45,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:33:45,006 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) [2024-11-20 17:33:45,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process