./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f 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_17-arrayloop_nr.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 b29c7049a333b10d890b8afae901738020ed1f084c2a7d471b316f0abdba3430 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:06:12,946 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:06:13,008 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:06:13,017 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:06:13,017 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:06:13,042 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:06:13,044 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:06:13,045 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:06:13,045 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:06:13,046 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:06:13,047 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:06:13,048 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:06:13,048 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:06:13,049 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:06:13,049 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:06:13,049 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:06:13,049 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:06:13,049 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:06:13,050 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:06:13,050 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:06:13,050 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:06:13,054 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:06:13,055 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:06:13,055 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:06:13,055 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:06:13,055 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:06:13,055 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:06:13,055 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:06:13,055 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:06:13,056 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:06:13,056 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:06:13,056 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:06:13,056 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:06:13,056 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:06:13,057 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:06:13,057 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:06:13,057 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:06:13,057 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:06:13,057 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:06:13,057 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:06:13,057 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:06:13,060 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:06:13,061 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b29c7049a333b10d890b8afae901738020ed1f084c2a7d471b316f0abdba3430 [2024-11-10 18:06:13,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:06:13,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:06:13,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:06:13,311 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:06:13,312 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:06:13,313 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i [2024-11-10 18:06:14,928 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:06:15,363 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:06:15,369 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i [2024-11-10 18:06:15,403 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dd696324/5bf6868b3111460f8206d60a28c6ece2/FLAG37df0e9e0 [2024-11-10 18:06:15,530 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dd696324/5bf6868b3111460f8206d60a28c6ece2 [2024-11-10 18:06:15,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:06:15,533 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:06:15,535 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:06:15,535 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:06:15,540 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:06:15,541 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:06:15" (1/1) ... [2024-11-10 18:06:15,542 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69e50ffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:15, skipping insertion in model container [2024-11-10 18:06:15,542 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:06:15" (1/1) ... [2024-11-10 18:06:15,589 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:06:15,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:06:16,009 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:06:16,046 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:06:16,193 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:06:16,193 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:16 WrapperNode [2024-11-10 18:06:16,194 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:06:16,195 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:06:16,195 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:06:16,195 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:06:16,201 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:16" (1/1) ... [2024-11-10 18:06:16,227 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:16" (1/1) ... [2024-11-10 18:06:16,265 INFO L138 Inliner]: procedures = 370, calls = 86, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 177 [2024-11-10 18:06:16,267 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:06:16,267 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:06:16,268 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:06:16,268 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:06:16,277 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:16" (1/1) ... [2024-11-10 18:06:16,277 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:16" (1/1) ... [2024-11-10 18:06:16,284 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:16" (1/1) ... [2024-11-10 18:06:16,318 INFO L175 MemorySlicer]: Split 78 memory accesses to 3 slices as follows [50, 14, 14]. 64 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [50, 10, 0]. The 11 writes are split as follows [0, 1, 10]. [2024-11-10 18:06:16,319 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:16" (1/1) ... [2024-11-10 18:06:16,319 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:16" (1/1) ... [2024-11-10 18:06:16,335 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:16" (1/1) ... [2024-11-10 18:06:16,336 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:16" (1/1) ... [2024-11-10 18:06:16,342 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:16" (1/1) ... [2024-11-10 18:06:16,343 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:16" (1/1) ... [2024-11-10 18:06:16,346 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:06:16,351 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:06:16,351 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:06:16,351 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:06:16,353 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:16" (1/1) ... [2024-11-10 18:06:16,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:06:16,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:06:16,393 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) [2024-11-10 18:06:16,400 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 [2024-11-10 18:06:16,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-10 18:06:16,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-10 18:06:16,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-10 18:06:16,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-10 18:06:16,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-10 18:06:16,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-10 18:06:16,439 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-10 18:06:16,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:06:16,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:06:16,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-10 18:06:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:06:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:06:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-10 18:06:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-10 18:06:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:06:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:06:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-10 18:06:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-10 18:06:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-10 18:06:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-10 18:06:16,441 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-10 18:06:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:06:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:06:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-10 18:06:16,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:06:16,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:06:16,443 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:06:16,562 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:06:16,564 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:06:16,847 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:06:16,847 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:06:17,097 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:06:17,097 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:06:17,097 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:06:17 BoogieIcfgContainer [2024-11-10 18:06:17,097 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:06:17,099 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:06:17,099 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:06:17,103 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:06:17,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:06:15" (1/3) ... [2024-11-10 18:06:17,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409dcbb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:06:17, skipping insertion in model container [2024-11-10 18:06:17,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:06:16" (2/3) ... [2024-11-10 18:06:17,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409dcbb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:06:17, skipping insertion in model container [2024-11-10 18:06:17,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:06:17" (3/3) ... [2024-11-10 18:06:17,106 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_17-arrayloop_nr.i [2024-11-10 18:06:17,121 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:06:17,121 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2024-11-10 18:06:17,122 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:06:17,181 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 18:06:17,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 84 transitions, 172 flow [2024-11-10 18:06:17,253 INFO L124 PetriNetUnfolderBase]: 6/83 cut-off events. [2024-11-10 18:06:17,254 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:06:17,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 83 events. 6/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 262 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2024-11-10 18:06:17,258 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 84 transitions, 172 flow [2024-11-10 18:06:17,261 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 83 transitions, 169 flow [2024-11-10 18:06:17,269 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:06:17,276 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;@e5e7346, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:06:17,276 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-10 18:06:17,280 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:06:17,281 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 18:06:17,281 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:06:17,282 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:17,318 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:06:17,319 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:17,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:17,325 INFO L85 PathProgramCache]: Analyzing trace with hash 15678417, now seen corresponding path program 1 times [2024-11-10 18:06:17,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:17,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603374075] [2024-11-10 18:06:17,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:17,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:17,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:17,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603374075] [2024-11-10 18:06:17,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603374075] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:17,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:17,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:06:17,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299634661] [2024-11-10 18:06:17,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:17,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:06:17,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:17,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:06:17,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:06:17,866 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 84 [2024-11-10 18:06:17,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2024-11-10 18:06:17,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:17,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 84 [2024-11-10 18:06:17,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:18,072 INFO L124 PetriNetUnfolderBase]: 142/539 cut-off events. [2024-11-10 18:06:18,072 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:06:18,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831 conditions, 539 events. 142/539 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3419 event pairs, 99 based on Foata normal form. 25/432 useless extension candidates. Maximal degree in co-relation 806. Up to 246 conditions per place. [2024-11-10 18:06:18,077 INFO L140 encePairwiseOnDemand]: 73/84 looper letters, 37 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2024-11-10 18:06:18,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 86 transitions, 257 flow [2024-11-10 18:06:18,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:06:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:06:18,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2024-11-10 18:06:18,089 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7420634920634921 [2024-11-10 18:06:18,091 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 169 flow. Second operand 3 states and 187 transitions. [2024-11-10 18:06:18,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 86 transitions, 257 flow [2024-11-10 18:06:18,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 86 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:06:18,097 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 162 flow [2024-11-10 18:06:18,099 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2024-11-10 18:06:18,102 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, -3 predicate places. [2024-11-10 18:06:18,102 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 162 flow [2024-11-10 18:06:18,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2024-11-10 18:06:18,103 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:18,103 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:06:18,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:06:18,103 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:18,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:18,104 INFO L85 PathProgramCache]: Analyzing trace with hash 15678418, now seen corresponding path program 1 times [2024-11-10 18:06:18,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:18,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261849058] [2024-11-10 18:06:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:18,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:18,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:18,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261849058] [2024-11-10 18:06:18,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261849058] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:18,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:18,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:06:18,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855604303] [2024-11-10 18:06:18,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:18,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:06:18,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:18,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:06:18,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:06:18,230 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 84 [2024-11-10 18:06:18,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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) [2024-11-10 18:06:18,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:18,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 84 [2024-11-10 18:06:18,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:18,386 INFO L124 PetriNetUnfolderBase]: 132/507 cut-off events. [2024-11-10 18:06:18,386 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-10 18:06:18,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 507 events. 132/507 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3175 event pairs, 99 based on Foata normal form. 22/397 useless extension candidates. Maximal degree in co-relation 776. Up to 246 conditions per place. [2024-11-10 18:06:18,390 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 35 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2024-11-10 18:06:18,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 82 transitions, 252 flow [2024-11-10 18:06:18,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:06:18,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:06:18,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2024-11-10 18:06:18,396 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7420634920634921 [2024-11-10 18:06:18,400 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 162 flow. Second operand 3 states and 187 transitions. [2024-11-10 18:06:18,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 82 transitions, 252 flow [2024-11-10 18:06:18,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 82 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:06:18,402 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 154 flow [2024-11-10 18:06:18,402 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-11-10 18:06:18,403 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, -7 predicate places. [2024-11-10 18:06:18,403 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 154 flow [2024-11-10 18:06:18,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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) [2024-11-10 18:06:18,404 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:18,407 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-10 18:06:18,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:06:18,407 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:18,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:18,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2112895846, now seen corresponding path program 1 times [2024-11-10 18:06:18,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:18,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860315861] [2024-11-10 18:06:18,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:18,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:18,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:18,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860315861] [2024-11-10 18:06:18,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860315861] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:18,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:18,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:06:18,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759606196] [2024-11-10 18:06:18,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:18,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:06:18,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:18,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:06:18,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:06:18,731 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 84 [2024-11-10 18:06:18,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 45.833333333333336) internal successors, (275), 6 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:18,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:18,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 84 [2024-11-10 18:06:18,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:18,815 INFO L124 PetriNetUnfolderBase]: 152/533 cut-off events. [2024-11-10 18:06:18,816 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-10 18:06:18,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 533 events. 152/533 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3231 event pairs, 126 based on Foata normal form. 0/414 useless extension candidates. Maximal degree in co-relation 843. Up to 307 conditions per place. [2024-11-10 18:06:18,819 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 31 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2024-11-10 18:06:18,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 210 flow [2024-11-10 18:06:18,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:06:18,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:06:18,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 171 transitions. [2024-11-10 18:06:18,821 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-11-10 18:06:18,821 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 154 flow. Second operand 3 states and 171 transitions. [2024-11-10 18:06:18,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 210 flow [2024-11-10 18:06:18,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 68 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:06:18,823 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 140 flow [2024-11-10 18:06:18,823 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-11-10 18:06:18,824 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, -11 predicate places. [2024-11-10 18:06:18,824 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 140 flow [2024-11-10 18:06:18,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.833333333333336) internal successors, (275), 6 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:06:18,824 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:18,824 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-10 18:06:18,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 18:06:18,825 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:18,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:18,825 INFO L85 PathProgramCache]: Analyzing trace with hash -2112895845, now seen corresponding path program 1 times [2024-11-10 18:06:18,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:18,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002996385] [2024-11-10 18:06:18,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:18,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:18,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:18,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002996385] [2024-11-10 18:06:18,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002996385] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:18,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:18,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:06:18,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206094329] [2024-11-10 18:06:18,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:18,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:06:18,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:18,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:06:18,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:06:19,143 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2024-11-10 18:06:19,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 39.8) internal successors, (199), 5 states have internal predecessors, (199), 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) [2024-11-10 18:06:19,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:19,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2024-11-10 18:06:19,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:19,281 INFO L124 PetriNetUnfolderBase]: 162/572 cut-off events. [2024-11-10 18:06:19,282 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:06:19,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 572 events. 162/572 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3547 event pairs, 135 based on Foata normal form. 0/433 useless extension candidates. Maximal degree in co-relation 903. Up to 329 conditions per place. [2024-11-10 18:06:19,285 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 33 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2024-11-10 18:06:19,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 220 flow [2024-11-10 18:06:19,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:06:19,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:06:19,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-11-10 18:06:19,288 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-11-10 18:06:19,288 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 140 flow. Second operand 4 states and 195 transitions. [2024-11-10 18:06:19,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 220 flow [2024-11-10 18:06:19,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:06:19,293 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 169 flow [2024-11-10 18:06:19,295 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2024-11-10 18:06:19,295 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, -7 predicate places. [2024-11-10 18:06:19,295 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 169 flow [2024-11-10 18:06:19,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.8) internal successors, (199), 5 states have internal predecessors, (199), 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) [2024-11-10 18:06:19,296 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:19,296 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1] [2024-11-10 18:06:19,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:06:19,296 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:19,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:19,297 INFO L85 PathProgramCache]: Analyzing trace with hash 187102397, now seen corresponding path program 1 times [2024-11-10 18:06:19,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:19,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502610297] [2024-11-10 18:06:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:19,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:19,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:19,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502610297] [2024-11-10 18:06:19,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502610297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:06:19,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096333673] [2024-11-10 18:06:19,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:19,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:19,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:06:19,530 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) [2024-11-10 18:06:19,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:06:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:19,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 18:06:19,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:06:19,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:19,720 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 [2024-11-10 18:06:19,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:19,794 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 [2024-11-10 18:06:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:19,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:06:19,998 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:06:19,999 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 [2024-11-10 18:06:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:20,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096333673] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:06:20,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:06:20,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2024-11-10 18:06:20,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534758842] [2024-11-10 18:06:20,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:06:20,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 18:06:20,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:20,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 18:06:20,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-11-10 18:06:21,208 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 84 [2024-11-10 18:06:21,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 169 flow. Second operand has 15 states, 15 states have (on average 39.4) internal successors, (591), 15 states have internal predecessors, (591), 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) [2024-11-10 18:06:21,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:21,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 84 [2024-11-10 18:06:21,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:21,766 INFO L124 PetriNetUnfolderBase]: 184/662 cut-off events. [2024-11-10 18:06:21,766 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-10 18:06:21,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 662 events. 184/662 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4192 event pairs, 56 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 1074. Up to 209 conditions per place. [2024-11-10 18:06:21,769 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 63 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2024-11-10 18:06:21,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 107 transitions, 415 flow [2024-11-10 18:06:21,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:06:21,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:06:21,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 345 transitions. [2024-11-10 18:06:21,771 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5867346938775511 [2024-11-10 18:06:21,771 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 169 flow. Second operand 7 states and 345 transitions. [2024-11-10 18:06:21,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 107 transitions, 415 flow [2024-11-10 18:06:21,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 107 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:06:21,773 INFO L231 Difference]: Finished difference. Result has 82 places, 77 transitions, 241 flow [2024-11-10 18:06:21,774 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=241, PETRI_PLACES=82, PETRI_TRANSITIONS=77} [2024-11-10 18:06:21,774 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 1 predicate places. [2024-11-10 18:06:21,774 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 77 transitions, 241 flow [2024-11-10 18:06:21,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 39.4) internal successors, (591), 15 states have internal predecessors, (591), 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) [2024-11-10 18:06:21,775 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:21,775 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:21,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:06:21,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:21,976 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:21,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:21,976 INFO L85 PathProgramCache]: Analyzing trace with hash 886249836, now seen corresponding path program 1 times [2024-11-10 18:06:21,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:21,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274935831] [2024-11-10 18:06:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:21,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-10 18:06:22,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:22,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274935831] [2024-11-10 18:06:22,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274935831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:22,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:22,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:06:22,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048569804] [2024-11-10 18:06:22,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:22,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:06:22,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:22,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:06:22,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:06:22,039 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 84 [2024-11-10 18:06:22,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 77 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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) [2024-11-10 18:06:22,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:22,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 84 [2024-11-10 18:06:22,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:22,179 INFO L124 PetriNetUnfolderBase]: 264/961 cut-off events. [2024-11-10 18:06:22,179 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2024-11-10 18:06:22,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1679 conditions, 961 events. 264/961 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 5943 event pairs, 117 based on Foata normal form. 10/802 useless extension candidates. Maximal degree in co-relation 1665. Up to 323 conditions per place. [2024-11-10 18:06:22,184 INFO L140 encePairwiseOnDemand]: 79/84 looper letters, 55 selfloop transitions, 6 changer transitions 0/97 dead transitions. [2024-11-10 18:06:22,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 97 transitions, 409 flow [2024-11-10 18:06:22,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:06:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:06:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 205 transitions. [2024-11-10 18:06:22,185 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.8134920634920635 [2024-11-10 18:06:22,186 INFO L175 Difference]: Start difference. First operand has 82 places, 77 transitions, 241 flow. Second operand 3 states and 205 transitions. [2024-11-10 18:06:22,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 97 transitions, 409 flow [2024-11-10 18:06:22,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 97 transitions, 401 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-10 18:06:22,189 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 260 flow [2024-11-10 18:06:22,189 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2024-11-10 18:06:22,190 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 3 predicate places. [2024-11-10 18:06:22,190 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 260 flow [2024-11-10 18:06:22,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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) [2024-11-10 18:06:22,190 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:22,190 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:22,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:06:22,191 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:22,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:22,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1347697586, now seen corresponding path program 1 times [2024-11-10 18:06:22,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:22,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243400967] [2024-11-10 18:06:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:22,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-10 18:06:22,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:22,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243400967] [2024-11-10 18:06:22,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243400967] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:22,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:06:22,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:06:22,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028036516] [2024-11-10 18:06:22,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:22,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:06:22,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:22,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:06:22,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:06:22,284 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2024-11-10 18:06:22,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 78 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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) [2024-11-10 18:06:22,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:22,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2024-11-10 18:06:22,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:22,441 INFO L124 PetriNetUnfolderBase]: 279/971 cut-off events. [2024-11-10 18:06:22,441 INFO L125 PetriNetUnfolderBase]: For 304/304 co-relation queries the response was YES. [2024-11-10 18:06:22,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1803 conditions, 971 events. 279/971 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 5925 event pairs, 176 based on Foata normal form. 0/831 useless extension candidates. Maximal degree in co-relation 1787. Up to 473 conditions per place. [2024-11-10 18:06:22,445 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 55 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2024-11-10 18:06:22,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 92 transitions, 433 flow [2024-11-10 18:06:22,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:06:22,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:06:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2024-11-10 18:06:22,447 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7619047619047619 [2024-11-10 18:06:22,447 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 260 flow. Second operand 3 states and 192 transitions. [2024-11-10 18:06:22,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 92 transitions, 433 flow [2024-11-10 18:06:22,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 92 transitions, 423 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:06:22,450 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 254 flow [2024-11-10 18:06:22,450 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=83, PETRI_TRANSITIONS=76} [2024-11-10 18:06:22,450 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 2 predicate places. [2024-11-10 18:06:22,451 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 254 flow [2024-11-10 18:06:22,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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) [2024-11-10 18:06:22,451 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:22,451 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:22,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 18:06:22,451 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:22,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:22,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1347697585, now seen corresponding path program 1 times [2024-11-10 18:06:22,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:22,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360941534] [2024-11-10 18:06:22,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:22,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:22,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:22,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360941534] [2024-11-10 18:06:22,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360941534] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:06:22,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106004541] [2024-11-10 18:06:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:22,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:22,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:06:22,520 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) [2024-11-10 18:06:22,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:06:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:22,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-10 18:06:22,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:06:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:22,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:06:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:22,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106004541] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:06:22,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:06:22,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-10 18:06:22,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755769514] [2024-11-10 18:06:22,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:06:22,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 18:06:22,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:22,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 18:06:22,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-10 18:06:22,704 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2024-11-10 18:06:22,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 254 flow. Second operand has 9 states, 9 states have (on average 51.77777777777778) internal successors, (466), 9 states have internal predecessors, (466), 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) [2024-11-10 18:06:22,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:22,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2024-11-10 18:06:22,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:23,200 INFO L124 PetriNetUnfolderBase]: 712/2411 cut-off events. [2024-11-10 18:06:23,200 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2024-11-10 18:06:23,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4333 conditions, 2411 events. 712/2411 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 14423 event pairs, 36 based on Foata normal form. 50/2078 useless extension candidates. Maximal degree in co-relation 4317. Up to 234 conditions per place. [2024-11-10 18:06:23,212 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 148 selfloop transitions, 16 changer transitions 0/197 dead transitions. [2024-11-10 18:06:23,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 197 transitions, 905 flow [2024-11-10 18:06:23,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 18:06:23,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 18:06:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 565 transitions. [2024-11-10 18:06:23,214 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.8407738095238095 [2024-11-10 18:06:23,214 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 254 flow. Second operand 8 states and 565 transitions. [2024-11-10 18:06:23,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 197 transitions, 905 flow [2024-11-10 18:06:23,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 197 transitions, 875 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-10 18:06:23,219 INFO L231 Difference]: Finished difference. Result has 94 places, 81 transitions, 358 flow [2024-11-10 18:06:23,219 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=358, PETRI_PLACES=94, PETRI_TRANSITIONS=81} [2024-11-10 18:06:23,220 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 13 predicate places. [2024-11-10 18:06:23,220 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 81 transitions, 358 flow [2024-11-10 18:06:23,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 51.77777777777778) internal successors, (466), 9 states have internal predecessors, (466), 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) [2024-11-10 18:06:23,221 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:23,221 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 1, 1] [2024-11-10 18:06:23,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 18:06:23,425 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,SelfDestructingSolverStorable7 [2024-11-10 18:06:23,427 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:23,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:23,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1347403547, now seen corresponding path program 2 times [2024-11-10 18:06:23,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:23,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025719756] [2024-11-10 18:06:23,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:23,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:24,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:24,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025719756] [2024-11-10 18:06:24,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025719756] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:06:24,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525147490] [2024-11-10 18:06:24,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:06:24,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:24,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:06:24,171 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) [2024-11-10 18:06:24,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:06:24,312 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:06:24,313 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:06:24,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-10 18:06:24,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:06:24,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:24,357 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 [2024-11-10 18:06:24,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:24,431 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 [2024-11-10 18:06:24,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:24,504 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 [2024-11-10 18:06:24,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:24,583 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 [2024-11-10 18:06:24,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:06:24,661 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 [2024-11-10 18:06:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:24,703 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:06:24,830 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:06:24,831 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 [2024-11-10 18:06:24,972 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:06:24,972 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 [2024-11-10 18:06:25,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:06:25,141 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 [2024-11-10 18:06:25,320 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:06:25,320 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 [2024-11-10 18:06:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:25,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525147490] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:06:25,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:06:25,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 33 [2024-11-10 18:06:25,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680045045] [2024-11-10 18:06:25,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:06:25,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-10 18:06:25,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:25,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-10 18:06:25,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2024-11-10 18:06:31,416 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 84 [2024-11-10 18:06:31,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 81 transitions, 358 flow. Second operand has 35 states, 35 states have (on average 39.371428571428574) internal successors, (1378), 35 states have internal predecessors, (1378), 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) [2024-11-10 18:06:31,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:31,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 84 [2024-11-10 18:06:31,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:33,161 INFO L124 PetriNetUnfolderBase]: 816/2622 cut-off events. [2024-11-10 18:06:33,161 INFO L125 PetriNetUnfolderBase]: For 1107/1107 co-relation queries the response was YES. [2024-11-10 18:06:33,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5091 conditions, 2622 events. 816/2622 cut-off events. For 1107/1107 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 16053 event pairs, 0 based on Foata normal form. 6/2238 useless extension candidates. Maximal degree in co-relation 5068. Up to 856 conditions per place. [2024-11-10 18:06:33,177 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 101 selfloop transitions, 24 changer transitions 0/157 dead transitions. [2024-11-10 18:06:33,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 157 transitions, 958 flow [2024-11-10 18:06:33,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 18:06:33,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-10 18:06:33,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 620 transitions. [2024-11-10 18:06:33,179 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5677655677655677 [2024-11-10 18:06:33,179 INFO L175 Difference]: Start difference. First operand has 94 places, 81 transitions, 358 flow. Second operand 13 states and 620 transitions. [2024-11-10 18:06:33,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 157 transitions, 958 flow [2024-11-10 18:06:33,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 157 transitions, 940 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-10 18:06:33,185 INFO L231 Difference]: Finished difference. Result has 112 places, 92 transitions, 527 flow [2024-11-10 18:06:33,185 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=527, PETRI_PLACES=112, PETRI_TRANSITIONS=92} [2024-11-10 18:06:33,186 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 31 predicate places. [2024-11-10 18:06:33,186 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 92 transitions, 527 flow [2024-11-10 18:06:33,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 39.371428571428574) internal successors, (1378), 35 states have internal predecessors, (1378), 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) [2024-11-10 18:06:33,187 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:33,187 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:33,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-10 18:06:33,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:33,393 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:33,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:33,394 INFO L85 PathProgramCache]: Analyzing trace with hash -148407857, now seen corresponding path program 2 times [2024-11-10 18:06:33,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:33,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59596304] [2024-11-10 18:06:33,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:33,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:33,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:33,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59596304] [2024-11-10 18:06:33,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59596304] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:06:33,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495898331] [2024-11-10 18:06:33,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:06:33,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:33,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:06:33,597 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) [2024-11-10 18:06:33,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:06:33,716 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 18:06:33,717 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:06:33,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 18:06:33,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:06:33,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:06:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-10 18:06:33,734 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:06:33,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495898331] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:06:33,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:06:33,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2024-11-10 18:06:33,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932412662] [2024-11-10 18:06:33,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:06:33,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:06:33,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:33,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:06:33,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-11-10 18:06:33,772 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 84 [2024-11-10 18:06:33,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 92 transitions, 527 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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) [2024-11-10 18:06:33,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:33,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 84 [2024-11-10 18:06:33,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:34,092 INFO L124 PetriNetUnfolderBase]: 685/2446 cut-off events. [2024-11-10 18:06:34,093 INFO L125 PetriNetUnfolderBase]: For 1630/1630 co-relation queries the response was YES. [2024-11-10 18:06:34,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4846 conditions, 2446 events. 685/2446 cut-off events. For 1630/1630 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 14817 event pairs, 504 based on Foata normal form. 68/2150 useless extension candidates. Maximal degree in co-relation 4815. Up to 1260 conditions per place. [2024-11-10 18:06:34,110 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 75 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2024-11-10 18:06:34,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 112 transitions, 821 flow [2024-11-10 18:06:34,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:06:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:06:34,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 194 transitions. [2024-11-10 18:06:34,112 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7698412698412699 [2024-11-10 18:06:34,112 INFO L175 Difference]: Start difference. First operand has 112 places, 92 transitions, 527 flow. Second operand 3 states and 194 transitions. [2024-11-10 18:06:34,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 112 transitions, 821 flow [2024-11-10 18:06:34,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 112 transitions, 775 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-11-10 18:06:34,118 INFO L231 Difference]: Finished difference. Result has 108 places, 90 transitions, 488 flow [2024-11-10 18:06:34,118 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=488, PETRI_PLACES=108, PETRI_TRANSITIONS=90} [2024-11-10 18:06:34,119 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 27 predicate places. [2024-11-10 18:06:34,119 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 90 transitions, 488 flow [2024-11-10 18:06:34,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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) [2024-11-10 18:06:34,120 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:34,120 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:06:34,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 18:06:34,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:34,321 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:34,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:34,322 INFO L85 PathProgramCache]: Analyzing trace with hash -886015505, now seen corresponding path program 1 times [2024-11-10 18:06:34,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:34,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662021804] [2024-11-10 18:06:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:34,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:34,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:34,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662021804] [2024-11-10 18:06:34,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662021804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:06:34,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470211484] [2024-11-10 18:06:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:34,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:34,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:06:34,517 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) [2024-11-10 18:06:34,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 18:06:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:34,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:06:34,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:06:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:34,737 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:06:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:34,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470211484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:06:34,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:06:34,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-10 18:06:34,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361004450] [2024-11-10 18:06:34,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:06:34,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:06:34,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:06:34,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:06:34,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:06:34,880 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2024-11-10 18:06:34,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 90 transitions, 488 flow. Second operand has 13 states, 13 states have (on average 52.15384615384615) internal successors, (678), 13 states have internal predecessors, (678), 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) [2024-11-10 18:06:34,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:06:34,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2024-11-10 18:06:34,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:06:35,704 INFO L124 PetriNetUnfolderBase]: 1152/3907 cut-off events. [2024-11-10 18:06:35,704 INFO L125 PetriNetUnfolderBase]: For 2825/2825 co-relation queries the response was YES. [2024-11-10 18:06:35,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7592 conditions, 3907 events. 1152/3907 cut-off events. For 2825/2825 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 23592 event pairs, 36 based on Foata normal form. 44/3332 useless extension candidates. Maximal degree in co-relation 7561. Up to 235 conditions per place. [2024-11-10 18:06:35,731 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 236 selfloop transitions, 25 changer transitions 0/292 dead transitions. [2024-11-10 18:06:35,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 292 transitions, 1617 flow [2024-11-10 18:06:35,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 18:06:35,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 18:06:35,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 856 transitions. [2024-11-10 18:06:35,734 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.8492063492063492 [2024-11-10 18:06:35,734 INFO L175 Difference]: Start difference. First operand has 108 places, 90 transitions, 488 flow. Second operand 12 states and 856 transitions. [2024-11-10 18:06:35,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 292 transitions, 1617 flow [2024-11-10 18:06:35,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 292 transitions, 1571 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-10 18:06:35,749 INFO L231 Difference]: Finished difference. Result has 122 places, 92 transitions, 602 flow [2024-11-10 18:06:35,749 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=602, PETRI_PLACES=122, PETRI_TRANSITIONS=92} [2024-11-10 18:06:35,751 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 41 predicate places. [2024-11-10 18:06:35,751 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 92 transitions, 602 flow [2024-11-10 18:06:35,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 52.15384615384615) internal successors, (678), 13 states have internal predecessors, (678), 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) [2024-11-10 18:06:35,751 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:06:35,751 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 1, 1] [2024-11-10 18:06:35,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-10 18:06:35,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-10 18:06:35,953 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:06:35,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:06:35,953 INFO L85 PathProgramCache]: Analyzing trace with hash 762183387, now seen corresponding path program 3 times [2024-11-10 18:06:35,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:06:35,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71592622] [2024-11-10 18:06:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:06:35,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:06:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:06:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 228 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:06:36,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:06:36,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71592622] [2024-11-10 18:06:36,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71592622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:06:36,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426597662] [2024-11-10 18:06:36,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:06:36,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:06:36,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:06:36,332 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:06:36,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 18:07:18,637 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-10 18:07:18,637 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:07:18,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-10 18:07:18,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:07:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:18,721 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:07:18,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426597662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:07:18,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:07:18,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 13 [2024-11-10 18:07:18,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776220905] [2024-11-10 18:07:18,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:07:18,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:07:18,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:07:18,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:07:18,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:07:18,761 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2024-11-10 18:07:18,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 92 transitions, 602 flow. Second operand has 13 states, 13 states have (on average 51.53846153846154) internal successors, (670), 13 states have internal predecessors, (670), 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) [2024-11-10 18:07:18,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:07:18,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2024-11-10 18:07:18,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:07:19,861 INFO L124 PetriNetUnfolderBase]: 1141/3892 cut-off events. [2024-11-10 18:07:19,862 INFO L125 PetriNetUnfolderBase]: For 2786/2786 co-relation queries the response was YES. [2024-11-10 18:07:19,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7551 conditions, 3892 events. 1141/3892 cut-off events. For 2786/2786 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 23550 event pairs, 27 based on Foata normal form. 10/3284 useless extension candidates. Maximal degree in co-relation 7514. Up to 230 conditions per place. [2024-11-10 18:07:19,895 INFO L140 encePairwiseOnDemand]: 77/84 looper letters, 244 selfloop transitions, 23 changer transitions 1/298 dead transitions. [2024-11-10 18:07:19,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 298 transitions, 1653 flow [2024-11-10 18:07:19,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 18:07:19,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-10 18:07:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 907 transitions. [2024-11-10 18:07:19,900 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.8305860805860806 [2024-11-10 18:07:19,900 INFO L175 Difference]: Start difference. First operand has 122 places, 92 transitions, 602 flow. Second operand 13 states and 907 transitions. [2024-11-10 18:07:19,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 298 transitions, 1653 flow [2024-11-10 18:07:19,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 298 transitions, 1553 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-11-10 18:07:19,910 INFO L231 Difference]: Finished difference. Result has 119 places, 88 transitions, 515 flow [2024-11-10 18:07:19,910 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=515, PETRI_PLACES=119, PETRI_TRANSITIONS=88} [2024-11-10 18:07:19,910 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 38 predicate places. [2024-11-10 18:07:19,911 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 88 transitions, 515 flow [2024-11-10 18:07:19,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 51.53846153846154) internal successors, (670), 13 states have internal predecessors, (670), 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) [2024-11-10 18:07:19,911 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:19,911 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:07:19,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 18:07:20,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:07:20,113 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:07:20,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:20,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1838744317, now seen corresponding path program 1 times [2024-11-10 18:07:20,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:20,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355193370] [2024-11-10 18:07:20,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:20,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 180 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:20,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:07:20,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355193370] [2024-11-10 18:07:20,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355193370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:07:20,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089601141] [2024-11-10 18:07:20,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:20,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:07:20,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:07:20,721 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:07:20,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 18:07:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:20,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 18:07:20,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:07:21,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:07:21,137 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 16 treesize of output 11 [2024-11-10 18:07:21,142 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:07:21,143 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 [2024-11-10 18:07:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 225 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:21,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:07:21,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-10 18:07:21,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:07:21,356 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 46 treesize of output 64 [2024-11-10 18:07:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 225 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:21,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089601141] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:07:21,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:07:21,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2024-11-10 18:07:21,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101020586] [2024-11-10 18:07:21,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:07:21,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-10 18:07:21,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:07:21,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-10 18:07:21,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2024-11-10 18:07:22,577 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 84 [2024-11-10 18:07:22,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 88 transitions, 515 flow. Second operand has 28 states, 28 states have (on average 44.857142857142854) internal successors, (1256), 28 states have internal predecessors, (1256), 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) [2024-11-10 18:07:22,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:07:22,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 84 [2024-11-10 18:07:22,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:07:24,171 INFO L124 PetriNetUnfolderBase]: 1221/4006 cut-off events. [2024-11-10 18:07:24,171 INFO L125 PetriNetUnfolderBase]: For 2113/2113 co-relation queries the response was YES. [2024-11-10 18:07:24,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7556 conditions, 4006 events. 1221/4006 cut-off events. For 2113/2113 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 23886 event pairs, 135 based on Foata normal form. 20/3384 useless extension candidates. Maximal degree in co-relation 7527. Up to 315 conditions per place. [2024-11-10 18:07:24,192 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 299 selfloop transitions, 46 changer transitions 1/376 dead transitions. [2024-11-10 18:07:24,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 376 transitions, 1883 flow [2024-11-10 18:07:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-10 18:07:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-10 18:07:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1230 transitions. [2024-11-10 18:07:24,195 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6972789115646258 [2024-11-10 18:07:24,195 INFO L175 Difference]: Start difference. First operand has 119 places, 88 transitions, 515 flow. Second operand 21 states and 1230 transitions. [2024-11-10 18:07:24,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 376 transitions, 1883 flow [2024-11-10 18:07:24,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 376 transitions, 1837 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-11-10 18:07:24,205 INFO L231 Difference]: Finished difference. Result has 127 places, 109 transitions, 673 flow [2024-11-10 18:07:24,205 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=673, PETRI_PLACES=127, PETRI_TRANSITIONS=109} [2024-11-10 18:07:24,206 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 46 predicate places. [2024-11-10 18:07:24,206 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 109 transitions, 673 flow [2024-11-10 18:07:24,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 44.857142857142854) internal successors, (1256), 28 states have internal predecessors, (1256), 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) [2024-11-10 18:07:24,206 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:24,207 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:07:24,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-10 18:07:24,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:07:24,408 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:07:24,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:24,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1634529425, now seen corresponding path program 2 times [2024-11-10 18:07:24,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:24,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794879422] [2024-11-10 18:07:24,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:24,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 180 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:25,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:07:25,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794879422] [2024-11-10 18:07:25,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794879422] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:07:25,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358897261] [2024-11-10 18:07:25,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:07:25,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:07:25,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:07:25,016 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:07:25,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 18:07:25,288 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:07:25,289 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:07:25,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 18:07:25,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:07:25,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:07:25,452 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 16 treesize of output 11 [2024-11-10 18:07:25,459 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:07:25,459 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 [2024-11-10 18:07:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 225 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:25,468 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:07:25,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-10 18:07:25,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:07:25,633 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 46 treesize of output 64 [2024-11-10 18:07:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 225 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:25,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358897261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:07:25,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:07:25,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2024-11-10 18:07:25,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145226114] [2024-11-10 18:07:25,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:07:25,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-10 18:07:25,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:07:25,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-10 18:07:25,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2024-11-10 18:07:27,071 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 84 [2024-11-10 18:07:27,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 109 transitions, 673 flow. Second operand has 28 states, 28 states have (on average 45.857142857142854) internal successors, (1284), 28 states have internal predecessors, (1284), 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) [2024-11-10 18:07:27,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:07:27,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 84 [2024-11-10 18:07:27,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:07:30,583 INFO L124 PetriNetUnfolderBase]: 2965/9866 cut-off events. [2024-11-10 18:07:30,583 INFO L125 PetriNetUnfolderBase]: For 5476/5493 co-relation queries the response was YES. [2024-11-10 18:07:30,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18775 conditions, 9866 events. 2965/9866 cut-off events. For 5476/5493 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 76561 event pairs, 98 based on Foata normal form. 115/8313 useless extension candidates. Maximal degree in co-relation 18746. Up to 345 conditions per place. [2024-11-10 18:07:30,637 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 571 selfloop transitions, 87 changer transitions 4/698 dead transitions. [2024-11-10 18:07:30,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 698 transitions, 3547 flow [2024-11-10 18:07:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-10 18:07:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-10 18:07:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2200 transitions. [2024-11-10 18:07:30,645 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7482993197278912 [2024-11-10 18:07:30,645 INFO L175 Difference]: Start difference. First operand has 127 places, 109 transitions, 673 flow. Second operand 35 states and 2200 transitions. [2024-11-10 18:07:30,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 698 transitions, 3547 flow [2024-11-10 18:07:30,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 698 transitions, 3327 flow, removed 22 selfloop flow, removed 14 redundant places. [2024-11-10 18:07:30,665 INFO L231 Difference]: Finished difference. Result has 180 places, 173 transitions, 1236 flow [2024-11-10 18:07:30,665 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1236, PETRI_PLACES=180, PETRI_TRANSITIONS=173} [2024-11-10 18:07:30,666 INFO L277 CegarLoopForPetriNet]: 81 programPoint places, 99 predicate places. [2024-11-10 18:07:30,666 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 173 transitions, 1236 flow [2024-11-10 18:07:30,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 45.857142857142854) internal successors, (1284), 28 states have internal predecessors, (1284), 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) [2024-11-10 18:07:30,667 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:07:30,667 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:07:30,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-10 18:07:30,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-10 18:07:30,868 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:07:30,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:07:30,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1166499447, now seen corresponding path program 1 times [2024-11-10 18:07:30,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:07:30,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168457599] [2024-11-10 18:07:30,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:30,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:07:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 127 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:34,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:07:34,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168457599] [2024-11-10 18:07:34,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168457599] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:07:34,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632483240] [2024-11-10 18:07:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:07:34,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:07:34,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:07:34,765 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:07:34,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 18:07:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:07:35,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-10 18:07:35,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:07:35,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-10 18:07:35,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-10 18:07:35,132 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-11-10 18:07:35,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2024-11-10 18:07:35,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:07:35,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-10 18:07:35,173 INFO L349 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2024-11-10 18:07:35,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2024-11-10 18:07:35,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:07:35,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2024-11-10 18:07:35,283 INFO L349 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2024-11-10 18:07:35,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2024-11-10 18:07:35,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:07:35,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2024-11-10 18:07:35,407 INFO L349 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2024-11-10 18:07:35,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2024-11-10 18:07:35,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:07:35,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 21 [2024-11-10 18:07:35,592 INFO L349 Elim1Store]: treesize reduction 66, result has 35.3 percent of original size [2024-11-10 18:07:35,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 53 [2024-11-10 18:07:35,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:07:35,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2024-11-10 18:07:35,845 INFO L349 Elim1Store]: treesize reduction 68, result has 26.9 percent of original size [2024-11-10 18:07:35,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 42 [2024-11-10 18:07:36,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:07:36,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2024-11-10 18:07:36,144 INFO L349 Elim1Store]: treesize reduction 84, result has 34.9 percent of original size [2024-11-10 18:07:36,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 36 treesize of output 65 [2024-11-10 18:07:36,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:07:36,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 29 [2024-11-10 18:07:36,503 INFO L349 Elim1Store]: treesize reduction 82, result has 26.8 percent of original size [2024-11-10 18:07:36,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 50 [2024-11-10 18:07:36,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:07:36,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 29 [2024-11-10 18:07:36,847 INFO L349 Elim1Store]: treesize reduction 82, result has 26.8 percent of original size [2024-11-10 18:07:36,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 50 [2024-11-10 18:07:37,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:07:37,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 29 [2024-11-10 18:07:37,674 INFO L349 Elim1Store]: treesize reduction 82, result has 26.8 percent of original size [2024-11-10 18:07:37,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 50 [2024-11-10 18:07:37,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2024-11-10 18:07:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 180 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:07:37,907 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:07:41,996 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3008 Int)) (= (select |c_#valid| (select (store (select |c_#memory_$Pointer$#1.base| |c_~#slot~0.base|) (+ |c_~#slot~0.offset| (* |c_ULTIMATE.start_main_~j~0#1| 4)) v_ArrVal_3008) |c_~#slot~0.offset|)) 1)) is different from false