./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 034172cc4904075fab6f792587170b7236be9fb41f3a62fa7fbe9a216ec4ca2c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:25:39,853 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:25:39,922 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:25:39,924 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:25:39,925 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:25:39,949 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:25:39,949 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:25:39,950 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:25:39,950 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:25:39,951 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:25:39,951 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:25:39,952 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:25:39,952 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:25:39,952 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:25:39,954 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:25:39,954 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:25:39,954 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:25:39,954 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:25:39,955 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:25:39,955 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:25:39,955 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:25:39,955 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:25:39,955 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:25:39,956 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:25:39,956 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:25:39,956 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:25:39,956 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:25:39,956 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:25:39,957 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:25:39,957 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:25:39,957 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:25:39,957 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:25:39,957 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:25:39,957 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:25:39,957 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:25:39,958 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:25:39,958 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:25:39,958 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:25:39,958 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:25:39,958 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:25:39,958 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:25:39,960 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:25:39,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 034172cc4904075fab6f792587170b7236be9fb41f3a62fa7fbe9a216ec4ca2c [2024-11-17 03:25:40,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:25:40,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:25:40,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:25:40,177 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:25:40,178 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:25:40,179 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i [2024-11-17 03:25:41,393 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:25:41,654 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:25:41,654 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i [2024-11-17 03:25:41,674 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48e68e0df/0b0554eae369450db619cc87f9f68cb3/FLAG2767b3e9d [2024-11-17 03:25:41,981 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48e68e0df/0b0554eae369450db619cc87f9f68cb3 [2024-11-17 03:25:41,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:25:41,986 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:25:41,987 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:25:41,987 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:25:41,991 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:25:41,991 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:25:41" (1/1) ... [2024-11-17 03:25:41,992 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@152491fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:41, skipping insertion in model container [2024-11-17 03:25:41,992 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:25:41" (1/1) ... [2024-11-17 03:25:42,032 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:25:42,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:25:42,457 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:25:42,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:25:42,568 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:25:42,568 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:42 WrapperNode [2024-11-17 03:25:42,568 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:25:42,569 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:25:42,569 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:25:42,570 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:25:42,575 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:42" (1/1) ... [2024-11-17 03:25:42,601 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:42" (1/1) ... [2024-11-17 03:25:42,633 INFO L138 Inliner]: procedures = 372, calls = 94, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 217 [2024-11-17 03:25:42,637 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:25:42,638 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:25:42,638 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:25:42,638 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:25:42,648 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:42" (1/1) ... [2024-11-17 03:25:42,648 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:42" (1/1) ... [2024-11-17 03:25:42,658 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:42" (1/1) ... [2024-11-17 03:25:42,689 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]. [2024-11-17 03:25:42,691 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:42" (1/1) ... [2024-11-17 03:25:42,691 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:42" (1/1) ... [2024-11-17 03:25:42,706 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:42" (1/1) ... [2024-11-17 03:25:42,706 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:42" (1/1) ... [2024-11-17 03:25:42,708 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:42" (1/1) ... [2024-11-17 03:25:42,713 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:42" (1/1) ... [2024-11-17 03:25:42,716 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:25:42,720 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:25:42,720 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:25:42,720 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:25:42,721 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:42" (1/1) ... [2024-11-17 03:25:42,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:25:42,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:25:42,753 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) [2024-11-17 03:25:42,754 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 [2024-11-17 03:25:42,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-17 03:25:42,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-17 03:25:42,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-17 03:25:42,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-17 03:25:42,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-17 03:25:42,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-17 03:25:42,793 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-17 03:25:42,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:25:42,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:25:42,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-17 03:25:42,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:25:42,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:25:42,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-17 03:25:42,793 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-17 03:25:42,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:25:42,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:25:42,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-17 03:25:42,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-17 03:25:42,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-17 03:25:42,793 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-17 03:25:42,793 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-17 03:25:42,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:25:42,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:25:42,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-17 03:25:42,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:25:42,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:25:42,795 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:25:42,969 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:25:42,971 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:25:43,449 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:25:43,450 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:25:43,715 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:25:43,715 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:25:43,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:25:43 BoogieIcfgContainer [2024-11-17 03:25:43,716 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:25:43,718 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:25:43,718 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:25:43,721 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:25:43,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:25:41" (1/3) ... [2024-11-17 03:25:43,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb6024b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:25:43, skipping insertion in model container [2024-11-17 03:25:43,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:42" (2/3) ... [2024-11-17 03:25:43,723 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb6024b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:25:43, skipping insertion in model container [2024-11-17 03:25:43,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:25:43" (3/3) ... [2024-11-17 03:25:43,724 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_12-arraycollapse_rc.i [2024-11-17 03:25:43,738 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:25:43,738 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2024-11-17 03:25:43,738 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:25:43,788 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-17 03:25:43,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 104 transitions, 212 flow [2024-11-17 03:25:43,861 INFO L124 PetriNetUnfolderBase]: 2/103 cut-off events. [2024-11-17 03:25:43,861 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:25:43,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 103 events. 2/103 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 339 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2024-11-17 03:25:43,864 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 104 transitions, 212 flow [2024-11-17 03:25:43,869 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 103 transitions, 209 flow [2024-11-17 03:25:43,880 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:25:43,887 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;@a7264ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:25:43,887 INFO L334 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2024-11-17 03:25:43,891 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:25:43,891 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-17 03:25:43,892 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:25:43,892 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:43,893 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:25:43,894 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-17 03:25:43,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:43,899 INFO L85 PathProgramCache]: Analyzing trace with hash 20573508, now seen corresponding path program 1 times [2024-11-17 03:25:43,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:43,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892685119] [2024-11-17 03:25:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:43,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:44,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:44,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892685119] [2024-11-17 03:25:44,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892685119] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:25:44,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:25:44,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:25:44,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014619933] [2024-11-17 03:25:44,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:25:44,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:25:44,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:44,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:25:44,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:25:44,306 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 104 [2024-11-17 03:25:44,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 103 transitions, 209 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2024-11-17 03:25:44,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:44,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 104 [2024-11-17 03:25:44,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:44,467 INFO L124 PetriNetUnfolderBase]: 64/291 cut-off events. [2024-11-17 03:25:44,467 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:25:44,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 291 events. 64/291 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1330 event pairs, 63 based on Foata normal form. 1/226 useless extension candidates. Maximal degree in co-relation 376. Up to 157 conditions per place. [2024-11-17 03:25:44,473 INFO L140 encePairwiseOnDemand]: 91/104 looper letters, 30 selfloop transitions, 6 changer transitions 0/96 dead transitions. [2024-11-17 03:25:44,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 96 transitions, 267 flow [2024-11-17 03:25:44,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:25:44,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:25:44,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2024-11-17 03:25:44,483 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7243589743589743 [2024-11-17 03:25:44,484 INFO L175 Difference]: Start difference. First operand has 105 places, 103 transitions, 209 flow. Second operand 3 states and 226 transitions. [2024-11-17 03:25:44,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 96 transitions, 267 flow [2024-11-17 03:25:44,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 96 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:25:44,489 INFO L231 Difference]: Finished difference. Result has 100 places, 96 transitions, 206 flow [2024-11-17 03:25:44,490 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=100, PETRI_TRANSITIONS=96} [2024-11-17 03:25:44,493 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, -5 predicate places. [2024-11-17 03:25:44,493 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 96 transitions, 206 flow [2024-11-17 03:25:44,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2024-11-17 03:25:44,493 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:44,493 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:25:44,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:25:44,494 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-17 03:25:44,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:44,494 INFO L85 PathProgramCache]: Analyzing trace with hash 20573509, now seen corresponding path program 1 times [2024-11-17 03:25:44,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:44,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076127048] [2024-11-17 03:25:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:44,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:44,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:44,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076127048] [2024-11-17 03:25:44,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076127048] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:25:44,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:25:44,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:25:44,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734576214] [2024-11-17 03:25:44,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:25:44,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:25:44,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:44,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:25:44,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:25:44,661 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 104 [2024-11-17 03:25:44,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 96 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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) [2024-11-17 03:25:44,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:44,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 104 [2024-11-17 03:25:44,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:44,776 INFO L124 PetriNetUnfolderBase]: 64/285 cut-off events. [2024-11-17 03:25:44,777 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-17 03:25:44,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 285 events. 64/285 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1293 event pairs, 63 based on Foata normal form. 6/225 useless extension candidates. Maximal degree in co-relation 410. Up to 157 conditions per place. [2024-11-17 03:25:44,780 INFO L140 encePairwiseOnDemand]: 92/104 looper letters, 27 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2024-11-17 03:25:44,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 90 transitions, 260 flow [2024-11-17 03:25:44,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:25:44,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:25:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2024-11-17 03:25:44,782 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7403846153846154 [2024-11-17 03:25:44,783 INFO L175 Difference]: Start difference. First operand has 100 places, 96 transitions, 206 flow. Second operand 3 states and 231 transitions. [2024-11-17 03:25:44,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 90 transitions, 260 flow [2024-11-17 03:25:44,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 90 transitions, 248 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:25:44,785 INFO L231 Difference]: Finished difference. Result has 94 places, 90 transitions, 194 flow [2024-11-17 03:25:44,786 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=94, PETRI_TRANSITIONS=90} [2024-11-17 03:25:44,786 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, -11 predicate places. [2024-11-17 03:25:44,786 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 90 transitions, 194 flow [2024-11-17 03:25:44,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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) [2024-11-17 03:25:44,787 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:44,789 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-17 03:25:44,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:25:44,789 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-17 03:25:44,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:44,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1703677074, now seen corresponding path program 1 times [2024-11-17 03:25:44,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:44,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591126097] [2024-11-17 03:25:44,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:44,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:44,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:44,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591126097] [2024-11-17 03:25:44,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591126097] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:25:44,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:25:44,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:25:44,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950493201] [2024-11-17 03:25:44,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:25:44,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:25:44,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:44,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:25:44,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:25:45,132 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 104 [2024-11-17 03:25:45,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 90 transitions, 194 flow. Second operand has 6 states, 6 states have (on average 60.833333333333336) internal successors, (365), 6 states have internal predecessors, (365), 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) [2024-11-17 03:25:45,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:45,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 104 [2024-11-17 03:25:45,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:45,214 INFO L124 PetriNetUnfolderBase]: 73/305 cut-off events. [2024-11-17 03:25:45,214 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-17 03:25:45,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 305 events. 73/305 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1404 event pairs, 72 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 451. Up to 181 conditions per place. [2024-11-17 03:25:45,217 INFO L140 encePairwiseOnDemand]: 97/104 looper letters, 36 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2024-11-17 03:25:45,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 84 transitions, 256 flow [2024-11-17 03:25:45,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:25:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:25:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 223 transitions. [2024-11-17 03:25:45,223 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7147435897435898 [2024-11-17 03:25:45,223 INFO L175 Difference]: Start difference. First operand has 94 places, 90 transitions, 194 flow. Second operand 3 states and 223 transitions. [2024-11-17 03:25:45,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 84 transitions, 256 flow [2024-11-17 03:25:45,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:25:45,224 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 172 flow [2024-11-17 03:25:45,225 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2024-11-17 03:25:45,225 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, -17 predicate places. [2024-11-17 03:25:45,226 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 172 flow [2024-11-17 03:25:45,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.833333333333336) internal successors, (365), 6 states have internal predecessors, (365), 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) [2024-11-17 03:25:45,226 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:45,226 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-17 03:25:45,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-17 03:25:45,226 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-17 03:25:45,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:45,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1703677073, now seen corresponding path program 1 times [2024-11-17 03:25:45,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:45,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479612115] [2024-11-17 03:25:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:45,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:45,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:45,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479612115] [2024-11-17 03:25:45,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479612115] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:25:45,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:25:45,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:25:45,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577166105] [2024-11-17 03:25:45,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:25:45,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:25:45,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:45,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:25:45,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:25:45,541 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 104 [2024-11-17 03:25:45,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 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) [2024-11-17 03:25:45,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:45,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 104 [2024-11-17 03:25:45,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:45,718 INFO L124 PetriNetUnfolderBase]: 64/292 cut-off events. [2024-11-17 03:25:45,719 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:25:45,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 292 events. 64/292 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1221 event pairs, 63 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 461. Up to 163 conditions per place. [2024-11-17 03:25:45,721 INFO L140 encePairwiseOnDemand]: 95/104 looper letters, 37 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2024-11-17 03:25:45,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 91 transitions, 272 flow [2024-11-17 03:25:45,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:25:45,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:25:45,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 266 transitions. [2024-11-17 03:25:45,725 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6394230769230769 [2024-11-17 03:25:45,725 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 172 flow. Second operand 4 states and 266 transitions. [2024-11-17 03:25:45,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 91 transitions, 272 flow [2024-11-17 03:25:45,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:25:45,729 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 219 flow [2024-11-17 03:25:45,730 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2024-11-17 03:25:45,731 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, -13 predicate places. [2024-11-17 03:25:45,731 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 219 flow [2024-11-17 03:25:45,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 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) [2024-11-17 03:25:45,732 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:45,732 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:25:45,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:25:45,732 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-17 03:25:45,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:45,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1869269145, now seen corresponding path program 1 times [2024-11-17 03:25:45,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:45,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159362973] [2024-11-17 03:25:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:45,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:45,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:45,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159362973] [2024-11-17 03:25:45,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159362973] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:25:45,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:25:45,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 03:25:45,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087731583] [2024-11-17 03:25:45,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:25:45,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:25:45,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:45,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:25:45,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-17 03:25:46,286 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 104 [2024-11-17 03:25:46,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 219 flow. Second operand has 7 states, 7 states have (on average 53.285714285714285) internal successors, (373), 7 states have internal predecessors, (373), 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) [2024-11-17 03:25:46,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:46,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 104 [2024-11-17 03:25:46,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:46,452 INFO L124 PetriNetUnfolderBase]: 64/286 cut-off events. [2024-11-17 03:25:46,453 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-17 03:25:46,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 286 events. 64/286 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1193 event pairs, 63 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 481. Up to 154 conditions per place. [2024-11-17 03:25:46,455 INFO L140 encePairwiseOnDemand]: 88/104 looper letters, 29 selfloop transitions, 17 changer transitions 0/85 dead transitions. [2024-11-17 03:25:46,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 85 transitions, 303 flow [2024-11-17 03:25:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:25:46,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:25:46,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 461 transitions. [2024-11-17 03:25:46,457 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5540865384615384 [2024-11-17 03:25:46,457 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 219 flow. Second operand 8 states and 461 transitions. [2024-11-17 03:25:46,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 85 transitions, 303 flow [2024-11-17 03:25:46,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 85 transitions, 301 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:25:46,459 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 243 flow [2024-11-17 03:25:46,459 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=243, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2024-11-17 03:25:46,462 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, -11 predicate places. [2024-11-17 03:25:46,462 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 243 flow [2024-11-17 03:25:46,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 53.285714285714285) internal successors, (373), 7 states have internal predecessors, (373), 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) [2024-11-17 03:25:46,463 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:46,463 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:25:46,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 03:25:46,464 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-17 03:25:46,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:46,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1869269144, now seen corresponding path program 1 times [2024-11-17 03:25:46,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:46,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366287537] [2024-11-17 03:25:46,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:46,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:46,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:46,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366287537] [2024-11-17 03:25:46,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366287537] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:25:46,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:25:46,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 03:25:46,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891749895] [2024-11-17 03:25:46,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:25:46,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:25:46,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:46,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:25:46,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-17 03:25:47,249 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 104 [2024-11-17 03:25:47,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 85 transitions, 243 flow. Second operand has 7 states, 7 states have (on average 50.285714285714285) internal successors, (352), 7 states have internal predecessors, (352), 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) [2024-11-17 03:25:47,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:47,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 104 [2024-11-17 03:25:47,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:47,389 INFO L124 PetriNetUnfolderBase]: 64/282 cut-off events. [2024-11-17 03:25:47,390 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-17 03:25:47,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 282 events. 64/282 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1189 event pairs, 63 based on Foata normal form. 2/236 useless extension candidates. Maximal degree in co-relation 492. Up to 158 conditions per place. [2024-11-17 03:25:47,391 INFO L140 encePairwiseOnDemand]: 94/104 looper letters, 32 selfloop transitions, 13 changer transitions 0/83 dead transitions. [2024-11-17 03:25:47,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 329 flow [2024-11-17 03:25:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:25:47,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:25:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 385 transitions. [2024-11-17 03:25:47,394 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5288461538461539 [2024-11-17 03:25:47,394 INFO L175 Difference]: Start difference. First operand has 94 places, 85 transitions, 243 flow. Second operand 7 states and 385 transitions. [2024-11-17 03:25:47,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 329 flow [2024-11-17 03:25:47,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 83 transitions, 295 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-17 03:25:47,397 INFO L231 Difference]: Finished difference. Result has 91 places, 83 transitions, 231 flow [2024-11-17 03:25:47,397 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=231, PETRI_PLACES=91, PETRI_TRANSITIONS=83} [2024-11-17 03:25:47,397 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, -14 predicate places. [2024-11-17 03:25:47,398 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 83 transitions, 231 flow [2024-11-17 03:25:47,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 50.285714285714285) internal successors, (352), 7 states have internal predecessors, (352), 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) [2024-11-17 03:25:47,398 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:47,398 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:25:47,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:25:47,399 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-17 03:25:47,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:47,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1071297119, now seen corresponding path program 1 times [2024-11-17 03:25:47,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:47,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954085585] [2024-11-17 03:25:47,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:47,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:47,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:47,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954085585] [2024-11-17 03:25:47,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954085585] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:25:47,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:25:47,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:25:47,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2451221] [2024-11-17 03:25:47,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:25:47,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:25:47,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:47,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:25:47,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:25:47,670 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 104 [2024-11-17 03:25:47,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 83 transitions, 231 flow. Second operand has 5 states, 5 states have (on average 62.6) internal successors, (313), 5 states have internal predecessors, (313), 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) [2024-11-17 03:25:47,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:47,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 104 [2024-11-17 03:25:47,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:47,769 INFO L124 PetriNetUnfolderBase]: 64/280 cut-off events. [2024-11-17 03:25:47,769 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-17 03:25:47,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 280 events. 64/280 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1180 event pairs, 63 based on Foata normal form. 2/232 useless extension candidates. Maximal degree in co-relation 479. Up to 158 conditions per place. [2024-11-17 03:25:47,771 INFO L140 encePairwiseOnDemand]: 95/104 looper letters, 27 selfloop transitions, 13 changer transitions 0/82 dead transitions. [2024-11-17 03:25:47,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 82 transitions, 309 flow [2024-11-17 03:25:47,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:25:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:25:47,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 341 transitions. [2024-11-17 03:25:47,772 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6557692307692308 [2024-11-17 03:25:47,772 INFO L175 Difference]: Start difference. First operand has 91 places, 83 transitions, 231 flow. Second operand 5 states and 341 transitions. [2024-11-17 03:25:47,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 82 transitions, 309 flow [2024-11-17 03:25:47,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 82 transitions, 283 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:25:47,774 INFO L231 Difference]: Finished difference. Result has 88 places, 82 transitions, 229 flow [2024-11-17 03:25:47,774 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=88, PETRI_TRANSITIONS=82} [2024-11-17 03:25:47,774 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, -17 predicate places. [2024-11-17 03:25:47,775 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 82 transitions, 229 flow [2024-11-17 03:25:47,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.6) internal successors, (313), 5 states have internal predecessors, (313), 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) [2024-11-17 03:25:47,775 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:47,775 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:25:47,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-17 03:25:47,775 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-17 03:25:47,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:47,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1071297120, now seen corresponding path program 1 times [2024-11-17 03:25:47,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:47,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571470584] [2024-11-17 03:25:47,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:47,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:47,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:47,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571470584] [2024-11-17 03:25:47,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571470584] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:25:47,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:25:47,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:25:47,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618208460] [2024-11-17 03:25:47,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:25:47,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:25:47,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:47,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:25:47,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:25:47,967 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 104 [2024-11-17 03:25:47,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 82 transitions, 229 flow. Second operand has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 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) [2024-11-17 03:25:47,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:47,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 104 [2024-11-17 03:25:47,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:48,060 INFO L124 PetriNetUnfolderBase]: 64/278 cut-off events. [2024-11-17 03:25:48,060 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-17 03:25:48,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 278 events. 64/278 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1171 event pairs, 63 based on Foata normal form. 2/230 useless extension candidates. Maximal degree in co-relation 482. Up to 158 conditions per place. [2024-11-17 03:25:48,061 INFO L140 encePairwiseOnDemand]: 95/104 looper letters, 30 selfloop transitions, 13 changer transitions 0/81 dead transitions. [2024-11-17 03:25:48,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 81 transitions, 313 flow [2024-11-17 03:25:48,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:25:48,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:25:48,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 329 transitions. [2024-11-17 03:25:48,064 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6326923076923077 [2024-11-17 03:25:48,064 INFO L175 Difference]: Start difference. First operand has 88 places, 82 transitions, 229 flow. Second operand 5 states and 329 transitions. [2024-11-17 03:25:48,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 81 transitions, 313 flow [2024-11-17 03:25:48,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 81 transitions, 287 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:25:48,065 INFO L231 Difference]: Finished difference. Result has 87 places, 81 transitions, 227 flow [2024-11-17 03:25:48,066 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=87, PETRI_TRANSITIONS=81} [2024-11-17 03:25:48,066 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, -18 predicate places. [2024-11-17 03:25:48,066 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 81 transitions, 227 flow [2024-11-17 03:25:48,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 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) [2024-11-17 03:25:48,067 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:48,067 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:25:48,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:25:48,067 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-17 03:25:48,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:48,067 INFO L85 PathProgramCache]: Analyzing trace with hash 704909900, now seen corresponding path program 1 times [2024-11-17 03:25:48,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:48,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446051593] [2024-11-17 03:25:48,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:48,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:48,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:48,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446051593] [2024-11-17 03:25:48,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446051593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:25:48,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480233383] [2024-11-17 03:25:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:48,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:25:48,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:25:48,845 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) [2024-11-17 03:25:48,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:25:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:48,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-17 03:25:48,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:25:49,054 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:25:49,055 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 [2024-11-17 03:25:49,063 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 [2024-11-17 03:25:49,137 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 [2024-11-17 03:25:49,151 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:25:49,151 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 [2024-11-17 03:25:49,173 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:25:49,173 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 [2024-11-17 03:25:49,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:25:49,321 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 [2024-11-17 03:25:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:49,364 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:25:49,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:25:49,578 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 [2024-11-17 03:25:49,675 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-17 03:25:49,676 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 [2024-11-17 03:25:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:49,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480233383] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:25:49,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:25:49,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 4] total 21 [2024-11-17 03:25:49,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542829415] [2024-11-17 03:25:49,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:25:49,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-17 03:25:49,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:49,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-17 03:25:49,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-17 03:25:52,949 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 104 [2024-11-17 03:25:52,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 81 transitions, 227 flow. Second operand has 23 states, 23 states have (on average 49.95652173913044) internal successors, (1149), 23 states have internal predecessors, (1149), 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) [2024-11-17 03:25:52,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:52,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 104 [2024-11-17 03:25:52,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:53,745 INFO L124 PetriNetUnfolderBase]: 75/344 cut-off events. [2024-11-17 03:25:53,745 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-11-17 03:25:53,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 344 events. 75/344 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1537 event pairs, 72 based on Foata normal form. 8/300 useless extension candidates. Maximal degree in co-relation 641. Up to 183 conditions per place. [2024-11-17 03:25:53,746 INFO L140 encePairwiseOnDemand]: 92/104 looper letters, 71 selfloop transitions, 15 changer transitions 0/119 dead transitions. [2024-11-17 03:25:53,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 119 transitions, 549 flow [2024-11-17 03:25:53,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-17 03:25:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-17 03:25:53,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 718 transitions. [2024-11-17 03:25:53,751 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5310650887573964 [2024-11-17 03:25:53,751 INFO L175 Difference]: Start difference. First operand has 87 places, 81 transitions, 227 flow. Second operand 13 states and 718 transitions. [2024-11-17 03:25:53,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 119 transitions, 549 flow [2024-11-17 03:25:53,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 119 transitions, 481 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:25:53,753 INFO L231 Difference]: Finished difference. Result has 100 places, 88 transitions, 285 flow [2024-11-17 03:25:53,753 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=285, PETRI_PLACES=100, PETRI_TRANSITIONS=88} [2024-11-17 03:25:53,754 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, -5 predicate places. [2024-11-17 03:25:53,754 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 88 transitions, 285 flow [2024-11-17 03:25:53,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 49.95652173913044) internal successors, (1149), 23 states have internal predecessors, (1149), 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) [2024-11-17 03:25:53,755 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:53,755 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:25:53,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:25:53,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:25:53,961 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-17 03:25:53,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:53,961 INFO L85 PathProgramCache]: Analyzing trace with hash 265723947, now seen corresponding path program 1 times [2024-11-17 03:25:53,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:53,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577951357] [2024-11-17 03:25:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:53,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:54,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:54,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577951357] [2024-11-17 03:25:54,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577951357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:25:54,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286108037] [2024-11-17 03:25:54,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:54,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:25:54,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:25:54,109 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) [2024-11-17 03:25:54,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:25:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:54,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-17 03:25:54,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:25:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:54,282 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:25:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:54,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286108037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:25:54,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:25:54,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-17 03:25:54,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348885734] [2024-11-17 03:25:54,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:25:54,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:25:54,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:54,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:25:54,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:25:54,330 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2024-11-17 03:25:54,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 88 transitions, 285 flow. Second operand has 9 states, 9 states have (on average 73.66666666666667) internal successors, (663), 9 states have internal predecessors, (663), 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) [2024-11-17 03:25:54,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:54,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2024-11-17 03:25:54,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:54,491 INFO L124 PetriNetUnfolderBase]: 64/324 cut-off events. [2024-11-17 03:25:54,491 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-11-17 03:25:54,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 324 events. 64/324 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1129 event pairs, 63 based on Foata normal form. 4/278 useless extension candidates. Maximal degree in co-relation 600. Up to 154 conditions per place. [2024-11-17 03:25:54,493 INFO L140 encePairwiseOnDemand]: 100/104 looper letters, 62 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2024-11-17 03:25:54,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 111 transitions, 523 flow [2024-11-17 03:25:54,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:25:54,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:25:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 626 transitions. [2024-11-17 03:25:54,495 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7524038461538461 [2024-11-17 03:25:54,495 INFO L175 Difference]: Start difference. First operand has 100 places, 88 transitions, 285 flow. Second operand 8 states and 626 transitions. [2024-11-17 03:25:54,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 111 transitions, 523 flow [2024-11-17 03:25:54,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 507 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-17 03:25:54,500 INFO L231 Difference]: Finished difference. Result has 110 places, 88 transitions, 306 flow [2024-11-17 03:25:54,500 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=306, PETRI_PLACES=110, PETRI_TRANSITIONS=88} [2024-11-17 03:25:54,501 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, 5 predicate places. [2024-11-17 03:25:54,501 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 88 transitions, 306 flow [2024-11-17 03:25:54,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 73.66666666666667) internal successors, (663), 9 states have internal predecessors, (663), 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) [2024-11-17 03:25:54,501 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:54,501 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2024-11-17 03:25:54,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:25:54,702 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 [2024-11-17 03:25:54,702 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-17 03:25:54,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:54,703 INFO L85 PathProgramCache]: Analyzing trace with hash 912249647, now seen corresponding path program 2 times [2024-11-17 03:25:54,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:54,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246621033] [2024-11-17 03:25:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:54,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:55,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:55,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246621033] [2024-11-17 03:25:55,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246621033] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:25:55,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384986911] [2024-11-17 03:25:55,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:25:55,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:25:55,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:25:55,982 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) [2024-11-17 03:25:55,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:25:56,223 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:25:56,224 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:25:56,228 INFO L255 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-17 03:25:56,232 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:25:56,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:25:56,273 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 [2024-11-17 03:25:56,311 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:25:56,311 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 [2024-11-17 03:25:56,316 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 [2024-11-17 03:25:56,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:25:56,432 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 [2024-11-17 03:25:56,486 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:25:56,486 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 [2024-11-17 03:25:56,497 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:25:56,497 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 [2024-11-17 03:25:56,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:25:56,614 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 [2024-11-17 03:25:56,655 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:25:56,655 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 [2024-11-17 03:25:56,659 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 [2024-11-17 03:25:56,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:25:56,780 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 [2024-11-17 03:25:56,837 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:25:56,838 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 [2024-11-17 03:25:56,842 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 [2024-11-17 03:25:56,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:25:56,968 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 [2024-11-17 03:25:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:57,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:25:57,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:25:57,220 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 [2024-11-17 03:25:57,287 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-17 03:25:57,288 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 [2024-11-17 03:25:57,477 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:25:57,477 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 [2024-11-17 03:25:57,563 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-17 03:25:57,564 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 [2024-11-17 03:25:57,761 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:25:57,761 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 [2024-11-17 03:25:57,824 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-17 03:25:57,824 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 [2024-11-17 03:25:57,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:25:57,992 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 [2024-11-17 03:25:58,060 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-17 03:25:58,061 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 [2024-11-17 03:25:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:58,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384986911] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:25:58,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:25:58,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 10] total 41 [2024-11-17 03:25:58,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165772315] [2024-11-17 03:25:58,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:25:58,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-17 03:25:58,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:58,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-17 03:25:58,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2024-11-17 03:26:08,217 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 104 [2024-11-17 03:26:08,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 88 transitions, 306 flow. Second operand has 43 states, 43 states have (on average 56.23255813953488) internal successors, (2418), 43 states have internal predecessors, (2418), 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) [2024-11-17 03:26:08,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:08,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 104 [2024-11-17 03:26:08,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:09,525 INFO L124 PetriNetUnfolderBase]: 77/408 cut-off events. [2024-11-17 03:26:09,525 INFO L125 PetriNetUnfolderBase]: For 344/344 co-relation queries the response was YES. [2024-11-17 03:26:09,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 408 events. 77/408 cut-off events. For 344/344 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1548 event pairs, 72 based on Foata normal form. 6/360 useless extension candidates. Maximal degree in co-relation 832. Up to 180 conditions per place. [2024-11-17 03:26:09,527 INFO L140 encePairwiseOnDemand]: 96/104 looper letters, 78 selfloop transitions, 32 changer transitions 0/149 dead transitions. [2024-11-17 03:26:09,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 149 transitions, 868 flow [2024-11-17 03:26:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-17 03:26:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-17 03:26:09,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1196 transitions. [2024-11-17 03:26:09,531 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-17 03:26:09,531 INFO L175 Difference]: Start difference. First operand has 110 places, 88 transitions, 306 flow. Second operand 20 states and 1196 transitions. [2024-11-17 03:26:09,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 149 transitions, 868 flow [2024-11-17 03:26:09,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 149 transitions, 860 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:26:09,535 INFO L231 Difference]: Finished difference. Result has 135 places, 109 transitions, 541 flow [2024-11-17 03:26:09,536 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=541, PETRI_PLACES=135, PETRI_TRANSITIONS=109} [2024-11-17 03:26:09,536 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, 30 predicate places. [2024-11-17 03:26:09,536 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 109 transitions, 541 flow [2024-11-17 03:26:09,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 56.23255813953488) internal successors, (2418), 43 states have internal predecessors, (2418), 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) [2024-11-17 03:26:09,537 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:09,537 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:09,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-17 03:26:09,737 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 [2024-11-17 03:26:09,738 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-17 03:26:09,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:09,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1742010261, now seen corresponding path program 2 times [2024-11-17 03:26:09,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:09,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994567898] [2024-11-17 03:26:09,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:09,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:26:10,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:10,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994567898] [2024-11-17 03:26:10,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994567898] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:26:10,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093076924] [2024-11-17 03:26:10,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:26:10,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:26:10,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:26:10,065 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) [2024-11-17 03:26:10,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:26:10,377 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:26:10,378 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:26:10,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 1429 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:26:10,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:26:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:26:10,455 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:26:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:26:10,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093076924] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:26:10,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:26:10,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-17 03:26:10,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000477961] [2024-11-17 03:26:10,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:26:10,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:26:10,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:10,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:26:10,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:26:10,559 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2024-11-17 03:26:10,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 109 transitions, 541 flow. Second operand has 13 states, 13 states have (on average 74.92307692307692) internal successors, (974), 13 states have internal predecessors, (974), 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) [2024-11-17 03:26:10,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:10,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2024-11-17 03:26:10,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:10,761 INFO L124 PetriNetUnfolderBase]: 64/370 cut-off events. [2024-11-17 03:26:10,762 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2024-11-17 03:26:10,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866 conditions, 370 events. 64/370 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1125 event pairs, 63 based on Foata normal form. 4/324 useless extension candidates. Maximal degree in co-relation 833. Up to 154 conditions per place. [2024-11-17 03:26:10,764 INFO L140 encePairwiseOnDemand]: 100/104 looper letters, 87 selfloop transitions, 12 changer transitions 0/140 dead transitions. [2024-11-17 03:26:10,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 140 transitions, 956 flow [2024-11-17 03:26:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:26:10,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:26:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 930 transitions. [2024-11-17 03:26:10,767 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7451923076923077 [2024-11-17 03:26:10,767 INFO L175 Difference]: Start difference. First operand has 135 places, 109 transitions, 541 flow. Second operand 12 states and 930 transitions. [2024-11-17 03:26:10,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 140 transitions, 956 flow [2024-11-17 03:26:10,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 140 transitions, 864 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-11-17 03:26:10,772 INFO L231 Difference]: Finished difference. Result has 142 places, 106 transitions, 487 flow [2024-11-17 03:26:10,773 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=487, PETRI_PLACES=142, PETRI_TRANSITIONS=106} [2024-11-17 03:26:10,774 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, 37 predicate places. [2024-11-17 03:26:10,775 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 106 transitions, 487 flow [2024-11-17 03:26:10,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 74.92307692307692) internal successors, (974), 13 states have internal predecessors, (974), 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) [2024-11-17 03:26:10,775 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:10,775 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1] [2024-11-17 03:26:10,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-17 03:26:10,976 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 [2024-11-17 03:26:10,976 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-17 03:26:10,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:10,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1789097679, now seen corresponding path program 3 times [2024-11-17 03:26:10,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:10,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156612976] [2024-11-17 03:26:10,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:10,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 444 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:26:11,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:11,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156612976] [2024-11-17 03:26:11,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156612976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:26:11,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719310293] [2024-11-17 03:26:11,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:26:11,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:26:11,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:26:11,520 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) [2024-11-17 03:26:11,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process