./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.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 bbb47797d2c6a4d5e961c4dfd7a8e6f4ff79c632e04c289068b1b9e8cca736fa --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:28:33,955 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:28:34,020 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 12:28:34,044 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:28:34,045 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:28:34,077 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:28:34,078 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:28:34,078 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:28:34,079 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:28:34,079 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:28:34,080 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:28:34,080 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:28:34,084 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:28:34,085 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:28:34,085 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:28:34,086 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:28:34,086 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:28:34,086 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:28:34,087 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:28:34,087 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:28:34,091 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:28:34,092 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:28:34,092 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:28:34,092 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:28:34,093 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:28:34,093 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:28:34,093 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:28:34,094 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:28:34,094 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:28:34,094 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:28:34,095 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:28:34,098 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:28:34,098 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:28:34,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:28:34,099 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:28:34,099 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:28:34,099 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 12:28:34,100 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 12:28:34,100 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:28:34,100 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:28:34,101 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:28:34,101 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:28:34,101 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bbb47797d2c6a4d5e961c4dfd7a8e6f4ff79c632e04c289068b1b9e8cca736fa [2024-10-13 12:28:34,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:28:34,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:28:34,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:28:34,382 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:28:34,382 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:28:34,383 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i [2024-10-13 12:28:35,903 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:28:36,190 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:28:36,190 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i [2024-10-13 12:28:36,211 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b6db56a1/4a1179a35bea498ba8439649f4206648/FLAG44bdaf41a [2024-10-13 12:28:36,230 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b6db56a1/4a1179a35bea498ba8439649f4206648 [2024-10-13 12:28:36,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:28:36,235 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:28:36,236 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:28:36,237 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:28:36,242 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:28:36,242 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:28:36" (1/1) ... [2024-10-13 12:28:36,243 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53693c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:28:36, skipping insertion in model container [2024-10-13 12:28:36,244 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:28:36" (1/1) ... [2024-10-13 12:28:36,297 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:28:36,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:28:36,830 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:28:36,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:28:36,979 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:28:36,979 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:28:36 WrapperNode [2024-10-13 12:28:36,980 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:28:36,981 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:28:36,981 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:28:36,981 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:28:36,987 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:28:36" (1/1) ... [2024-10-13 12:28:37,010 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:28:36" (1/1) ... [2024-10-13 12:28:37,042 INFO L138 Inliner]: procedures = 371, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 124 [2024-10-13 12:28:37,043 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:28:37,044 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:28:37,044 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:28:37,044 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:28:37,053 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:28:36" (1/1) ... [2024-10-13 12:28:37,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:28:36" (1/1) ... [2024-10-13 12:28:37,058 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:28:36" (1/1) ... [2024-10-13 12:28:37,083 INFO L175 MemorySlicer]: Split 24 memory accesses to 3 slices as follows [5, 5, 14]. 58 percent of accesses are in the largest equivalence class. The 5 initializations are split as follows [5, 0, 0]. The 12 writes are split as follows [0, 2, 10]. [2024-10-13 12:28:37,083 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:28:36" (1/1) ... [2024-10-13 12:28:37,084 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:28:36" (1/1) ... [2024-10-13 12:28:37,093 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:28:36" (1/1) ... [2024-10-13 12:28:37,097 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:28:36" (1/1) ... [2024-10-13 12:28:37,101 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:28:36" (1/1) ... [2024-10-13 12:28:37,103 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:28:36" (1/1) ... [2024-10-13 12:28:37,107 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:28:37,108 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:28:37,108 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:28:37,108 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:28:37,109 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:28:36" (1/1) ... [2024-10-13 12:28:37,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:28:37,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:28:37,153 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) [2024-10-13 12:28:37,156 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 [2024-10-13 12:28:37,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-13 12:28:37,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-13 12:28:37,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-13 12:28:37,207 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-13 12:28:37,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 12:28:37,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 12:28:37,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 12:28:37,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 12:28:37,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 12:28:37,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 12:28:37,210 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-13 12:28:37,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 12:28:37,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:28:37,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-13 12:28:37,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-13 12:28:37,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-13 12:28:37,212 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-13 12:28:37,212 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-13 12:28:37,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 12:28:37,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 12:28:37,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 12:28:37,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:28:37,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:28:37,217 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 12:28:37,385 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:28:37,387 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:28:37,808 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:28:37,808 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:28:38,013 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:28:38,014 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-13 12:28:38,014 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:28:38 BoogieIcfgContainer [2024-10-13 12:28:38,014 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:28:38,017 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:28:38,017 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:28:38,020 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:28:38,021 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:28:36" (1/3) ... [2024-10-13 12:28:38,021 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f404356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:28:38, skipping insertion in model container [2024-10-13 12:28:38,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:28:36" (2/3) ... [2024-10-13 12:28:38,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f404356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:28:38, skipping insertion in model container [2024-10-13 12:28:38,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:28:38" (3/3) ... [2024-10-13 12:28:38,024 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_09-arraylist.i [2024-10-13 12:28:38,042 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:28:38,043 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2024-10-13 12:28:38,043 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:28:38,107 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:28:38,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 71 transitions, 146 flow [2024-10-13 12:28:38,191 INFO L124 PetriNetUnfolderBase]: 1/70 cut-off events. [2024-10-13 12:28:38,192 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:28:38,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 70 events. 1/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 289 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2024-10-13 12:28:38,197 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 71 transitions, 146 flow [2024-10-13 12:28:38,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 70 transitions, 143 flow [2024-10-13 12:28:38,208 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:28:38,214 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;@520926b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:28:38,214 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-10-13 12:28:38,217 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:28:38,217 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-13 12:28:38,218 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:28:38,218 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:28:38,220 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:28:38,220 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:28:38,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:28:38,225 INFO L85 PathProgramCache]: Analyzing trace with hash 392716, now seen corresponding path program 1 times [2024-10-13 12:28:38,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:28:38,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269205387] [2024-10-13 12:28:38,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:28:38,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:28:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:28:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:28:38,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:28:38,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269205387] [2024-10-13 12:28:38,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269205387] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:28:38,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:28:38,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:28:38,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837260364] [2024-10-13 12:28:38,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:28:38,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:28:38,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:28:38,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:28:38,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:28:38,669 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 71 [2024-10-13 12:28:38,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2024-10-13 12:28:38,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:28:38,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 71 [2024-10-13 12:28:38,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:28:38,853 INFO L124 PetriNetUnfolderBase]: 64/262 cut-off events. [2024-10-13 12:28:38,853 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:28:38,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 262 events. 64/262 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1355 event pairs, 63 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 377. Up to 151 conditions per place. [2024-10-13 12:28:38,860 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 24 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-10-13 12:28:38,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 66 transitions, 191 flow [2024-10-13 12:28:38,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:28:38,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:28:38,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2024-10-13 12:28:38,873 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6995305164319249 [2024-10-13 12:28:38,875 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 143 flow. Second operand 3 states and 149 transitions. [2024-10-13 12:28:38,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 66 transitions, 191 flow [2024-10-13 12:28:38,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 66 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:28:38,883 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 142 flow [2024-10-13 12:28:38,885 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2024-10-13 12:28:38,891 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -3 predicate places. [2024-10-13 12:28:38,893 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 142 flow [2024-10-13 12:28:38,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2024-10-13 12:28:38,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:28:38,895 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:28:38,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 12:28:38,896 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:28:38,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:28:38,896 INFO L85 PathProgramCache]: Analyzing trace with hash 392717, now seen corresponding path program 1 times [2024-10-13 12:28:38,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:28:38,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527793918] [2024-10-13 12:28:38,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:28:38,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:28:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:28:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:28:39,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:28:39,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527793918] [2024-10-13 12:28:39,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527793918] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:28:39,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:28:39,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:28:39,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224445448] [2024-10-13 12:28:39,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:28:39,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:28:39,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:28:39,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:28:39,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:28:39,130 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 71 [2024-10-13 12:28:39,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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) [2024-10-13 12:28:39,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:28:39,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 71 [2024-10-13 12:28:39,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:28:39,259 INFO L124 PetriNetUnfolderBase]: 64/258 cut-off events. [2024-10-13 12:28:39,260 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 12:28:39,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 258 events. 64/258 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1336 event pairs, 63 based on Foata normal form. 4/207 useless extension candidates. Maximal degree in co-relation 385. Up to 151 conditions per place. [2024-10-13 12:28:39,263 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 22 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-10-13 12:28:39,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 186 flow [2024-10-13 12:28:39,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:28:39,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:28:39,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2024-10-13 12:28:39,267 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7183098591549296 [2024-10-13 12:28:39,267 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 142 flow. Second operand 3 states and 153 transitions. [2024-10-13 12:28:39,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 186 flow [2024-10-13 12:28:39,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 62 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:28:39,271 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 134 flow [2024-10-13 12:28:39,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-10-13 12:28:39,272 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -7 predicate places. [2024-10-13 12:28:39,272 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 134 flow [2024-10-13 12:28:39,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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) [2024-10-13 12:28:39,273 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:28:39,273 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:28:39,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 12:28:39,274 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:28:39,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:28:39,276 INFO L85 PathProgramCache]: Analyzing trace with hash 377411023, now seen corresponding path program 1 times [2024-10-13 12:28:39,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:28:39,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559167297] [2024-10-13 12:28:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:28:39,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:28:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:28:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:28:39,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:28:39,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559167297] [2024-10-13 12:28:39,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559167297] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:28:39,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:28:39,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:28:39,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152091971] [2024-10-13 12:28:39,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:28:39,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:28:39,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:28:39,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:28:39,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:28:39,592 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 71 [2024-10-13 12:28:39,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 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) [2024-10-13 12:28:39,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:28:39,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 71 [2024-10-13 12:28:39,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:28:39,714 INFO L124 PetriNetUnfolderBase]: 73/276 cut-off events. [2024-10-13 12:28:39,715 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 12:28:39,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 276 events. 73/276 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1418 event pairs, 72 based on Foata normal form. 1/228 useless extension candidates. Maximal degree in co-relation 424. Up to 169 conditions per place. [2024-10-13 12:28:39,719 INFO L140 encePairwiseOnDemand]: 62/71 looper letters, 22 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-10-13 12:28:39,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 58 transitions, 180 flow [2024-10-13 12:28:39,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:28:39,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:28:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 175 transitions. [2024-10-13 12:28:39,722 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6161971830985915 [2024-10-13 12:28:39,722 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 134 flow. Second operand 4 states and 175 transitions. [2024-10-13 12:28:39,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 58 transitions, 180 flow [2024-10-13 12:28:39,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 58 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:28:39,727 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 128 flow [2024-10-13 12:28:39,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-10-13 12:28:39,729 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -10 predicate places. [2024-10-13 12:28:39,729 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 128 flow [2024-10-13 12:28:39,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 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) [2024-10-13 12:28:39,729 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:28:39,729 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:28:39,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 12:28:39,730 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:28:39,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:28:39,731 INFO L85 PathProgramCache]: Analyzing trace with hash 377411024, now seen corresponding path program 1 times [2024-10-13 12:28:39,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:28:39,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577527573] [2024-10-13 12:28:39,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:28:39,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:28:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:28:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:28:39,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:28:39,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577527573] [2024-10-13 12:28:39,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577527573] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:28:39,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:28:39,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:28:39,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140759913] [2024-10-13 12:28:39,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:28:39,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:28:39,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:28:39,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:28:39,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:28:40,193 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 71 [2024-10-13 12:28:40,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 43.8) internal successors, (219), 5 states have internal predecessors, (219), 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) [2024-10-13 12:28:40,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:28:40,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 71 [2024-10-13 12:28:40,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:28:40,355 INFO L124 PetriNetUnfolderBase]: 64/265 cut-off events. [2024-10-13 12:28:40,356 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-13 12:28:40,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 265 events. 64/265 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1253 event pairs, 63 based on Foata normal form. 2/216 useless extension candidates. Maximal degree in co-relation 389. Up to 155 conditions per place. [2024-10-13 12:28:40,358 INFO L140 encePairwiseOnDemand]: 62/71 looper letters, 29 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2024-10-13 12:28:40,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 65 transitions, 220 flow [2024-10-13 12:28:40,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:28:40,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:28:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 210 transitions. [2024-10-13 12:28:40,365 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7394366197183099 [2024-10-13 12:28:40,365 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 128 flow. Second operand 4 states and 210 transitions. [2024-10-13 12:28:40,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 65 transitions, 220 flow [2024-10-13 12:28:40,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 202 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:28:40,371 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 166 flow [2024-10-13 12:28:40,372 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2024-10-13 12:28:40,372 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -8 predicate places. [2024-10-13 12:28:40,373 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 166 flow [2024-10-13 12:28:40,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.8) internal successors, (219), 5 states have internal predecessors, (219), 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) [2024-10-13 12:28:40,373 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:28:40,373 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:28:40,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 12:28:40,373 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:28:40,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:28:40,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1832332416, now seen corresponding path program 1 times [2024-10-13 12:28:40,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:28:40,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374153172] [2024-10-13 12:28:40,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:28:40,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:28:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:28:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:28:40,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:28:40,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374153172] [2024-10-13 12:28:40,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374153172] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:28:40,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:28:40,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 12:28:40,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956946735] [2024-10-13 12:28:40,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:28:40,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 12:28:40,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:28:40,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 12:28:40,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-13 12:28:40,950 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 71 [2024-10-13 12:28:40,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 166 flow. Second operand has 7 states, 7 states have (on average 37.285714285714285) internal successors, (261), 7 states have internal predecessors, (261), 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) [2024-10-13 12:28:40,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:28:40,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 71 [2024-10-13 12:28:40,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:28:41,110 INFO L124 PetriNetUnfolderBase]: 64/261 cut-off events. [2024-10-13 12:28:41,111 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 12:28:41,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 261 events. 64/261 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1225 event pairs, 63 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 410. Up to 148 conditions per place. [2024-10-13 12:28:41,114 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 23 selfloop transitions, 11 changer transitions 0/61 dead transitions. [2024-10-13 12:28:41,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 61 transitions, 230 flow [2024-10-13 12:28:41,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 12:28:41,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 12:28:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 283 transitions. [2024-10-13 12:28:41,117 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5694164989939637 [2024-10-13 12:28:41,118 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 166 flow. Second operand 7 states and 283 transitions. [2024-10-13 12:28:41,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 61 transitions, 230 flow [2024-10-13 12:28:41,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 61 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:28:41,121 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 182 flow [2024-10-13 12:28:41,122 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=182, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2024-10-13 12:28:41,125 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -5 predicate places. [2024-10-13 12:28:41,125 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 182 flow [2024-10-13 12:28:41,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.285714285714285) internal successors, (261), 7 states have internal predecessors, (261), 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) [2024-10-13 12:28:41,126 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:28:41,126 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:28:41,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 12:28:41,126 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:28:41,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:28:41,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1832332417, now seen corresponding path program 1 times [2024-10-13 12:28:41,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:28:41,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611065578] [2024-10-13 12:28:41,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:28:41,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:28:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:28:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:28:41,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:28:41,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611065578] [2024-10-13 12:28:41,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611065578] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:28:41,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:28:41,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 12:28:41,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522136455] [2024-10-13 12:28:41,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:28:41,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 12:28:41,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:28:41,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 12:28:41,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-13 12:28:41,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2024-10-13 12:28:41,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 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) [2024-10-13 12:28:41,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:28:41,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2024-10-13 12:28:41,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:28:41,975 INFO L124 PetriNetUnfolderBase]: 64/257 cut-off events. [2024-10-13 12:28:41,975 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-10-13 12:28:41,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 257 events. 64/257 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1207 event pairs, 63 based on Foata normal form. 2/215 useless extension candidates. Maximal degree in co-relation 395. Up to 148 conditions per place. [2024-10-13 12:28:41,977 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 22 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-10-13 12:28:41,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 59 transitions, 244 flow [2024-10-13 12:28:41,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 12:28:41,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 12:28:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 261 transitions. [2024-10-13 12:28:41,979 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5251509054325956 [2024-10-13 12:28:41,979 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 182 flow. Second operand 7 states and 261 transitions. [2024-10-13 12:28:41,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 59 transitions, 244 flow [2024-10-13 12:28:41,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 59 transitions, 222 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-13 12:28:41,981 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 178 flow [2024-10-13 12:28:41,982 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=178, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2024-10-13 12:28:41,982 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -7 predicate places. [2024-10-13 12:28:41,983 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 178 flow [2024-10-13 12:28:41,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 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) [2024-10-13 12:28:41,983 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:28:41,983 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:28:41,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 12:28:41,984 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:28:41,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:28:41,984 INFO L85 PathProgramCache]: Analyzing trace with hash -65124992, now seen corresponding path program 1 times [2024-10-13 12:28:41,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:28:41,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582067075] [2024-10-13 12:28:41,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:28:41,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:28:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:28:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:28:42,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:28:42,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582067075] [2024-10-13 12:28:42,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582067075] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:28:42,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:28:42,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:28:42,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867285492] [2024-10-13 12:28:42,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:28:42,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:28:42,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:28:42,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:28:42,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:28:42,168 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 71 [2024-10-13 12:28:42,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 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) [2024-10-13 12:28:42,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:28:42,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 71 [2024-10-13 12:28:42,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:28:42,275 INFO L124 PetriNetUnfolderBase]: 64/255 cut-off events. [2024-10-13 12:28:42,276 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-10-13 12:28:42,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 255 events. 64/255 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1187 event pairs, 63 based on Foata normal form. 2/215 useless extension candidates. Maximal degree in co-relation 394. Up to 150 conditions per place. [2024-10-13 12:28:42,278 INFO L140 encePairwiseOnDemand]: 64/71 looper letters, 22 selfloop transitions, 11 changer transitions 0/58 dead transitions. [2024-10-13 12:28:42,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 58 transitions, 242 flow [2024-10-13 12:28:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:28:42,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:28:42,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 219 transitions. [2024-10-13 12:28:42,279 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6169014084507042 [2024-10-13 12:28:42,279 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 178 flow. Second operand 5 states and 219 transitions. [2024-10-13 12:28:42,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 58 transitions, 242 flow [2024-10-13 12:28:42,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 58 transitions, 220 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-13 12:28:42,282 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 176 flow [2024-10-13 12:28:42,282 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-10-13 12:28:42,283 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -10 predicate places. [2024-10-13 12:28:42,283 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 176 flow [2024-10-13 12:28:42,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 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) [2024-10-13 12:28:42,283 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:28:42,283 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:28:42,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-13 12:28:42,284 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:28:42,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:28:42,284 INFO L85 PathProgramCache]: Analyzing trace with hash -65124991, now seen corresponding path program 1 times [2024-10-13 12:28:42,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:28:42,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138916940] [2024-10-13 12:28:42,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:28:42,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:28:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:28:42,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:28:42,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:28:42,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138916940] [2024-10-13 12:28:42,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138916940] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:28:42,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:28:42,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:28:42,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114926084] [2024-10-13 12:28:42,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:28:42,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:28:42,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:28:42,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:28:42,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:28:42,603 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 71 [2024-10-13 12:28:42,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 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) [2024-10-13 12:28:42,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:28:42,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 71 [2024-10-13 12:28:42,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:28:42,724 INFO L124 PetriNetUnfolderBase]: 64/253 cut-off events. [2024-10-13 12:28:42,724 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-10-13 12:28:42,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 253 events. 64/253 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1171 event pairs, 63 based on Foata normal form. 2/213 useless extension candidates. Maximal degree in co-relation 392. Up to 150 conditions per place. [2024-10-13 12:28:42,726 INFO L140 encePairwiseOnDemand]: 64/71 looper letters, 20 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2024-10-13 12:28:42,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 236 flow [2024-10-13 12:28:42,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:28:42,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:28:42,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 227 transitions. [2024-10-13 12:28:42,730 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6394366197183099 [2024-10-13 12:28:42,730 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 176 flow. Second operand 5 states and 227 transitions. [2024-10-13 12:28:42,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 236 flow [2024-10-13 12:28:42,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 12:28:42,733 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 174 flow [2024-10-13 12:28:42,733 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-10-13 12:28:42,735 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -11 predicate places. [2024-10-13 12:28:42,735 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 174 flow [2024-10-13 12:28:42,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 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) [2024-10-13 12:28:42,737 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:28:42,737 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:28:42,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 12:28:42,738 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:28:42,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:28:42,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1858070715, now seen corresponding path program 1 times [2024-10-13 12:28:42,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:28:42,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980793823] [2024-10-13 12:28:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:28:42,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:28:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:28:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:28:43,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:28:43,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980793823] [2024-10-13 12:28:43,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980793823] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:28:43,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497604868] [2024-10-13 12:28:43,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:28:43,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:28:43,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:28:43,380 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) [2024-10-13 12:28:43,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 12:28:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:28:43,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-13 12:28:43,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:28:43,638 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 12:28:43,640 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 [2024-10-13 12:28:43,664 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 [2024-10-13 12:28:43,761 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-13 12:28:43,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-13 12:28:43,791 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 12:28:43,792 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 [2024-10-13 12:28:43,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 12:28:43,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:28:43,978 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 [2024-10-13 12:28:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:28:44,024 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:28:44,266 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 12:28:44,267 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 [2024-10-13 12:28:44,357 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 12:28:44,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-13 12:28:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:28:44,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497604868] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:28:44,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:28:44,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 4] total 18 [2024-10-13 12:28:44,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301164064] [2024-10-13 12:28:44,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:28:44,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 12:28:44,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:28:44,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 12:28:44,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-10-13 12:28:46,583 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 71 [2024-10-13 12:28:46,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 174 flow. Second operand has 20 states, 20 states have (on average 35.65) internal successors, (713), 20 states have internal predecessors, (713), 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) [2024-10-13 12:28:46,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:28:46,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 71 [2024-10-13 12:28:46,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:28:47,130 INFO L124 PetriNetUnfolderBase]: 75/305 cut-off events. [2024-10-13 12:28:47,131 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-10-13 12:28:47,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569 conditions, 305 events. 75/305 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1431 event pairs, 72 based on Foata normal form. 7/267 useless extension candidates. Maximal degree in co-relation 438. Up to 170 conditions per place. [2024-10-13 12:28:47,133 INFO L140 encePairwiseOnDemand]: 62/71 looper letters, 42 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-10-13 12:28:47,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 77 transitions, 382 flow [2024-10-13 12:28:47,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 12:28:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-13 12:28:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 401 transitions. [2024-10-13 12:28:47,135 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5647887323943662 [2024-10-13 12:28:47,135 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 174 flow. Second operand 10 states and 401 transitions. [2024-10-13 12:28:47,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 77 transitions, 382 flow [2024-10-13 12:28:47,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 77 transitions, 328 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 12:28:47,139 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 216 flow [2024-10-13 12:28:47,140 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=216, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2024-10-13 12:28:47,141 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -3 predicate places. [2024-10-13 12:28:47,141 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 216 flow [2024-10-13 12:28:47,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 35.65) internal successors, (713), 20 states have internal predecessors, (713), 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) [2024-10-13 12:28:47,142 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:28:47,142 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:28:47,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 12:28:47,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:28:47,343 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:28:47,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:28:47,344 INFO L85 PathProgramCache]: Analyzing trace with hash -323725069, now seen corresponding path program 1 times [2024-10-13 12:28:47,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:28:47,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235214142] [2024-10-13 12:28:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:28:47,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:28:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:28:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 12:28:47,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:28:47,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235214142] [2024-10-13 12:28:47,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235214142] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:28:47,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:28:47,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:28:47,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327057290] [2024-10-13 12:28:47,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:28:47,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:28:47,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:28:47,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:28:47,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:28:47,516 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 71 [2024-10-13 12:28:47,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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) [2024-10-13 12:28:47,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:28:47,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 71 [2024-10-13 12:28:47,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:28:47,611 INFO L124 PetriNetUnfolderBase]: 73/288 cut-off events. [2024-10-13 12:28:47,611 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-10-13 12:28:47,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 288 events. 73/288 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1304 event pairs, 56 based on Foata normal form. 0/258 useless extension candidates. Maximal degree in co-relation 485. Up to 164 conditions per place. [2024-10-13 12:28:47,613 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 42 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2024-10-13 12:28:47,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 66 transitions, 314 flow [2024-10-13 12:28:47,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:28:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:28:47,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2024-10-13 12:28:47,615 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7605633802816901 [2024-10-13 12:28:47,616 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 216 flow. Second operand 3 states and 162 transitions. [2024-10-13 12:28:47,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 66 transitions, 314 flow [2024-10-13 12:28:47,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 304 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:28:47,618 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 206 flow [2024-10-13 12:28:47,621 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2024-10-13 12:28:47,622 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -5 predicate places. [2024-10-13 12:28:47,622 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 206 flow [2024-10-13 12:28:47,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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) [2024-10-13 12:28:47,622 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:28:47,622 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:28:47,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-13 12:28:47,623 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:28:47,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:28:47,623 INFO L85 PathProgramCache]: Analyzing trace with hash -323725068, now seen corresponding path program 1 times [2024-10-13 12:28:47,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:28:47,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008299970] [2024-10-13 12:28:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:28:47,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:28:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:28:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:28:47,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:28:47,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008299970] [2024-10-13 12:28:47,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008299970] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:28:47,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545026338] [2024-10-13 12:28:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:28:47,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:28:47,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:28:47,785 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) [2024-10-13 12:28:47,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 12:28:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:28:47,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 12:28:47,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:28:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:28:48,018 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:28:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:28:48,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545026338] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:28:48,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:28:48,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-13 12:28:48,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452396917] [2024-10-13 12:28:48,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:28:48,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 12:28:48,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:28:48,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 12:28:48,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-13 12:28:48,090 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 71 [2024-10-13 12:28:48,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 206 flow. Second operand has 9 states, 9 states have (on average 49.888888888888886) internal successors, (449), 9 states have internal predecessors, (449), 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) [2024-10-13 12:28:48,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:28:48,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 71 [2024-10-13 12:28:48,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:28:48,268 INFO L124 PetriNetUnfolderBase]: 64/286 cut-off events. [2024-10-13 12:28:48,268 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-10-13 12:28:48,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 286 events. 64/286 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1047 event pairs, 63 based on Foata normal form. 4/256 useless extension candidates. Maximal degree in co-relation 491. Up to 146 conditions per place. [2024-10-13 12:28:48,270 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 54 selfloop transitions, 8 changer transitions 0/85 dead transitions. [2024-10-13 12:28:48,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 85 transitions, 422 flow [2024-10-13 12:28:48,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:28:48,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:28:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 426 transitions. [2024-10-13 12:28:48,273 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-10-13 12:28:48,273 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 206 flow. Second operand 8 states and 426 transitions. [2024-10-13 12:28:48,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 85 transitions, 422 flow [2024-10-13 12:28:48,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 85 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:28:48,276 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 236 flow [2024-10-13 12:28:48,277 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=236, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2024-10-13 12:28:48,277 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2024-10-13 12:28:48,277 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 236 flow [2024-10-13 12:28:48,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 49.888888888888886) internal successors, (449), 9 states have internal predecessors, (449), 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) [2024-10-13 12:28:48,278 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:28:48,278 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2024-10-13 12:28:48,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 12:28:48,478 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,SelfDestructingSolverStorable10 [2024-10-13 12:28:48,479 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:28:48,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:28:48,480 INFO L85 PathProgramCache]: Analyzing trace with hash 828753444, now seen corresponding path program 2 times [2024-10-13 12:28:48,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:28:48,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667060193] [2024-10-13 12:28:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:28:48,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:28:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:28:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:28:50,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:28:50,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667060193] [2024-10-13 12:28:50,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667060193] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:28:50,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782812420] [2024-10-13 12:28:50,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:28:50,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:28:50,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:28:50,538 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) [2024-10-13 12:28:50,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 12:28:50,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:28:50,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:28:50,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-10-13 12:28:50,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:28:50,877 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-13 12:28:50,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-13 12:28:50,894 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 12:28:50,894 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 [2024-10-13 12:28:50,985 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 12:28:50,986 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 [2024-10-13 12:28:51,001 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 [2024-10-13 12:28:51,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 12:28:51,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:28:51,187 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 [2024-10-13 12:28:51,247 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 12:28:51,247 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 [2024-10-13 12:28:51,252 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 [2024-10-13 12:28:51,417 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 12:28:51,418 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 [2024-10-13 12:28:51,427 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 [2024-10-13 12:28:51,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 12:28:51,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:28:51,524 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 [2024-10-13 12:28:51,704 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-13 12:28:51,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-13 12:28:51,728 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 12:28:51,729 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 [2024-10-13 12:28:51,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-10-13 12:28:51,905 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-13 12:28:51,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-13 12:28:51,923 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 12:28:51,923 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 [2024-10-13 12:28:52,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:28:52,190 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 [2024-10-13 12:28:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:28:52,240 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:28:52,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 12:28:52,518 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 [2024-10-13 12:28:52,603 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 12:28:52,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-13 12:28:52,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 12:28:52,833 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 [2024-10-13 12:28:52,938 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 12:28:52,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-13 12:28:53,172 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 12:28:53,172 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 [2024-10-13 12:28:53,263 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 12:28:53,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-13 12:28:53,504 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 12:28:53,504 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 [2024-10-13 12:28:53,605 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 12:28:53,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-13 12:28:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:28:53,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782812420] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:28:53,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:28:53,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 10] total 48 [2024-10-13 12:28:53,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790916953] [2024-10-13 12:28:53,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:28:53,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-13 12:28:53,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:28:53,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-13 12:28:53,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=2104, Unknown=0, NotChecked=0, Total=2450 [2024-10-13 12:29:04,527 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 71 [2024-10-13 12:29:04,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 236 flow. Second operand has 50 states, 50 states have (on average 35.92) internal successors, (1796), 50 states have internal predecessors, (1796), 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) [2024-10-13 12:29:04,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:29:04,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 71 [2024-10-13 12:29:04,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:29:06,385 INFO L124 PetriNetUnfolderBase]: 77/359 cut-off events. [2024-10-13 12:29:06,386 INFO L125 PetriNetUnfolderBase]: For 222/222 co-relation queries the response was YES. [2024-10-13 12:29:06,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 359 events. 77/359 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1361 event pairs, 72 based on Foata normal form. 6/328 useless extension candidates. Maximal degree in co-relation 688. Up to 172 conditions per place. [2024-10-13 12:29:06,388 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 66 selfloop transitions, 32 changer transitions 0/119 dead transitions. [2024-10-13 12:29:06,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 119 transitions, 740 flow [2024-10-13 12:29:06,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-13 12:29:06,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-13 12:29:06,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 988 transitions. [2024-10-13 12:29:06,392 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5352112676056338 [2024-10-13 12:29:06,392 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 236 flow. Second operand 26 states and 988 transitions. [2024-10-13 12:29:06,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 119 transitions, 740 flow [2024-10-13 12:29:06,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 119 transitions, 734 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:29:06,398 INFO L231 Difference]: Finished difference. Result has 110 places, 81 transitions, 518 flow [2024-10-13 12:29:06,398 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=518, PETRI_PLACES=110, PETRI_TRANSITIONS=81} [2024-10-13 12:29:06,400 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 37 predicate places. [2024-10-13 12:29:06,401 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 81 transitions, 518 flow [2024-10-13 12:29:06,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 35.92) internal successors, (1796), 50 states have internal predecessors, (1796), 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) [2024-10-13 12:29:06,402 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:29:06,402 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:29:06,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 12:29:06,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:29:06,603 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:29:06,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:29:06,603 INFO L85 PathProgramCache]: Analyzing trace with hash 252547656, now seen corresponding path program 2 times [2024-10-13 12:29:06,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:29:06,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100083424] [2024-10-13 12:29:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:29:06,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:29:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:29:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:29:07,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:29:07,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100083424] [2024-10-13 12:29:07,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100083424] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:29:07,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089196752] [2024-10-13 12:29:07,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:29:07,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:29:07,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:29:07,029 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) [2024-10-13 12:29:07,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 12:29:07,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-13 12:29:07,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:29:07,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 12:29:07,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:29:07,271 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 [2024-10-13 12:29:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2024-10-13 12:29:07,282 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:29:07,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089196752] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:29:07,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 12:29:07,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2024-10-13 12:29:07,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688098675] [2024-10-13 12:29:07,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:29:07,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:29:07,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:29:07,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:29:07,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-10-13 12:29:07,328 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 71 [2024-10-13 12:29:07,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 81 transitions, 518 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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) [2024-10-13 12:29:07,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:29:07,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 71 [2024-10-13 12:29:07,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:29:07,450 INFO L124 PetriNetUnfolderBase]: 68/327 cut-off events. [2024-10-13 12:29:07,451 INFO L125 PetriNetUnfolderBase]: For 487/487 co-relation queries the response was YES. [2024-10-13 12:29:07,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 327 events. 68/327 cut-off events. For 487/487 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1132 event pairs, 56 based on Foata normal form. 8/306 useless extension candidates. Maximal degree in co-relation 721. Up to 208 conditions per place. [2024-10-13 12:29:07,453 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 63 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2024-10-13 12:29:07,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 86 transitions, 658 flow [2024-10-13 12:29:07,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:29:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:29:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2024-10-13 12:29:07,455 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7699530516431925 [2024-10-13 12:29:07,455 INFO L175 Difference]: Start difference. First operand has 110 places, 81 transitions, 518 flow. Second operand 3 states and 164 transitions. [2024-10-13 12:29:07,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 86 transitions, 658 flow [2024-10-13 12:29:07,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 86 transitions, 563 flow, removed 29 selfloop flow, removed 12 redundant places. [2024-10-13 12:29:07,460 INFO L231 Difference]: Finished difference. Result has 98 places, 79 transitions, 423 flow [2024-10-13 12:29:07,461 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=423, PETRI_PLACES=98, PETRI_TRANSITIONS=79} [2024-10-13 12:29:07,461 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 25 predicate places. [2024-10-13 12:29:07,461 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 79 transitions, 423 flow [2024-10-13 12:29:07,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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) [2024-10-13 12:29:07,462 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:29:07,462 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:29:07,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 12:29:07,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:29:07,667 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:29:07,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:29:07,667 INFO L85 PathProgramCache]: Analyzing trace with hash 251519323, now seen corresponding path program 1 times [2024-10-13 12:29:07,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:29:07,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756910169] [2024-10-13 12:29:07,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:29:07,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:29:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:29:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:29:08,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:29:08,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756910169] [2024-10-13 12:29:08,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756910169] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:29:08,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278345603] [2024-10-13 12:29:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:29:08,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:29:08,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:29:08,048 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) [2024-10-13 12:29:08,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 12:29:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:29:08,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 1237 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 12:29:08,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:29:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:29:08,483 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:29:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:29:08,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278345603] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:29:08,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:29:08,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-10-13 12:29:08,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637474288] [2024-10-13 12:29:08,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:29:08,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 12:29:08,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:29:08,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 12:29:08,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-13 12:29:08,624 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 71 [2024-10-13 12:29:08,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 79 transitions, 423 flow. Second operand has 13 states, 13 states have (on average 51.0) internal successors, (663), 13 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:29:08,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:29:08,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 71 [2024-10-13 12:29:08,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:29:08,850 INFO L124 PetriNetUnfolderBase]: 64/320 cut-off events. [2024-10-13 12:29:08,851 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2024-10-13 12:29:08,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 320 events. 64/320 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 974 event pairs, 63 based on Foata normal form. 4/294 useless extension candidates. Maximal degree in co-relation 669. Up to 146 conditions per place. [2024-10-13 12:29:08,853 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 79 selfloop transitions, 12 changer transitions 0/112 dead transitions. [2024-10-13 12:29:08,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 112 transitions, 766 flow [2024-10-13 12:29:08,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 12:29:08,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 12:29:08,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 634 transitions. [2024-10-13 12:29:08,858 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.744131455399061 [2024-10-13 12:29:08,858 INFO L175 Difference]: Start difference. First operand has 98 places, 79 transitions, 423 flow. Second operand 12 states and 634 transitions. [2024-10-13 12:29:08,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 112 transitions, 766 flow [2024-10-13 12:29:08,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 112 transitions, 750 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-10-13 12:29:08,863 INFO L231 Difference]: Finished difference. Result has 108 places, 76 transitions, 395 flow [2024-10-13 12:29:08,866 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=395, PETRI_PLACES=108, PETRI_TRANSITIONS=76} [2024-10-13 12:29:08,867 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 35 predicate places. [2024-10-13 12:29:08,867 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 76 transitions, 395 flow [2024-10-13 12:29:08,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 51.0) internal successors, (663), 13 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:29:08,867 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:29:08,867 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1] [2024-10-13 12:29:08,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 12:29:09,068 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,SelfDestructingSolverStorable13 [2024-10-13 12:29:09,068 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:29:09,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:29:09,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1675682594, now seen corresponding path program 3 times [2024-10-13 12:29:09,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:29:09,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823864234] [2024-10-13 12:29:09,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:29:09,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:29:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:29:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 399 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:29:09,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:29:09,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823864234] [2024-10-13 12:29:09,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823864234] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:29:09,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363666502] [2024-10-13 12:29:09,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 12:29:09,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:29:09,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:29:09,762 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) [2024-10-13 12:29:09,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process