./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/09-regions_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.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:25:38,285 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:25:38,382 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:25:38,387 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:25:38,387 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:25:38,413 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:25:38,414 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:25:38,414 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:25:38,415 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:25:38,415 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:25:38,416 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:25:38,417 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:25:38,417 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:25:38,418 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:25:38,421 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:25:38,421 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:25:38,422 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:25:38,422 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:25:38,422 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:25:38,423 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:25:38,423 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:25:38,423 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:25:38,424 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:25:38,424 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:25:38,424 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:25:38,424 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:25:38,425 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:25:38,425 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:25:38,425 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:25:38,426 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:25:38,426 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:25:38,426 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:25:38,426 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:25:38,427 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:25:38,427 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:25:38,428 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:25:38,428 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:25:38,428 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:25:38,428 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:25:38,429 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:25:38,429 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:25:38,431 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:25:38,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bbb47797d2c6a4d5e961c4dfd7a8e6f4ff79c632e04c289068b1b9e8cca736fa [2024-11-17 03:25:38,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:25:38,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:25:38,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:25:38,728 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:25:38,728 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:25:38,729 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i [2024-11-17 03:25:40,220 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:25:40,507 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:25:40,508 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i [2024-11-17 03:25:40,534 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c9b9d93c/6338bd1cafc5486fbab51f10637e117f/FLAGa3975351d [2024-11-17 03:25:40,798 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c9b9d93c/6338bd1cafc5486fbab51f10637e117f [2024-11-17 03:25:40,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:25:40,803 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:25:40,806 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:25:40,806 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:25:40,811 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:25:40,812 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:25:40" (1/1) ... [2024-11-17 03:25:40,813 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee2bd87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:40, skipping insertion in model container [2024-11-17 03:25:40,813 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:25:40" (1/1) ... [2024-11-17 03:25:40,863 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:25:41,378 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:25:41,393 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:25:41,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:25:41,560 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:25:41,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:41 WrapperNode [2024-11-17 03:25:41,560 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:25:41,561 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:25:41,561 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:25:41,561 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:25:41,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:41" (1/1) ... [2024-11-17 03:25:41,592 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:41" (1/1) ... [2024-11-17 03:25:41,629 INFO L138 Inliner]: procedures = 372, calls = 43, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 132 [2024-11-17 03:25:41,629 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:25:41,630 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:25:41,630 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:25:41,630 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:25:41,643 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:41" (1/1) ... [2024-11-17 03:25:41,644 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:41" (1/1) ... [2024-11-17 03:25:41,649 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:41" (1/1) ... [2024-11-17 03:25:41,671 INFO L175 MemorySlicer]: Split 33 memory accesses to 3 slices as follows [5, 14, 14]. 42 percent of accesses are in the largest equivalence class. The 15 initializations are split as follows [5, 10, 0]. The 11 writes are split as follows [0, 1, 10]. [2024-11-17 03:25:41,671 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:41" (1/1) ... [2024-11-17 03:25:41,672 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:41" (1/1) ... [2024-11-17 03:25:41,681 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:41" (1/1) ... [2024-11-17 03:25:41,682 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:41" (1/1) ... [2024-11-17 03:25:41,685 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:41" (1/1) ... [2024-11-17 03:25:41,686 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:41" (1/1) ... [2024-11-17 03:25:41,690 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:25:41,691 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:25:41,691 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:25:41,691 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:25:41,693 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:41" (1/1) ... [2024-11-17 03:25:41,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:25:41,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:25:41,721 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-17 03:25:41,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-17 03:25:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-17 03:25:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-17 03:25:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-17 03:25:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-17 03:25:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-17 03:25:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-17 03:25:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-17 03:25:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:25:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:25:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-17 03:25:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:25:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:25:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-17 03:25:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-17 03:25:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:25:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:25:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-17 03:25:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-17 03:25:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-17 03:25:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-17 03:25:41,765 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-17 03:25:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:25:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:25:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-17 03:25:41,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:25:41,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:25:41,767 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:25:41,921 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:25:41,922 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:25:42,317 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:25:42,317 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:25:42,521 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:25:42,522 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:25:42,522 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:25:42 BoogieIcfgContainer [2024-11-17 03:25:42,522 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:25:42,524 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:25:42,524 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:25:42,529 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:25:42,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:25:40" (1/3) ... [2024-11-17 03:25:42,530 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52a26191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:25:42, skipping insertion in model container [2024-11-17 03:25:42,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:41" (2/3) ... [2024-11-17 03:25:42,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52a26191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:25:42, skipping insertion in model container [2024-11-17 03:25:42,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:25:42" (3/3) ... [2024-11-17 03:25:42,534 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_09-arraylist.i [2024-11-17 03:25:42,551 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:25:42,551 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2024-11-17 03:25:42,551 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:25:42,603 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-17 03:25:42,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 74 transitions, 152 flow [2024-11-17 03:25:42,681 INFO L124 PetriNetUnfolderBase]: 2/73 cut-off events. [2024-11-17 03:25:42,681 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:25:42,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 73 events. 2/73 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 282 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-11-17 03:25:42,684 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 74 transitions, 152 flow [2024-11-17 03:25:42,687 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 73 transitions, 149 flow [2024-11-17 03:25:42,696 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:25:42,703 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;@316da273, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:25:42,704 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-17 03:25:42,708 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:25:42,708 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-17 03:25:42,708 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:25:42,708 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:42,709 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:25:42,710 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:25:42,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:42,715 INFO L85 PathProgramCache]: Analyzing trace with hash 12957752, now seen corresponding path program 1 times [2024-11-17 03:25:42,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:42,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916267299] [2024-11-17 03:25:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:42,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:43,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:43,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916267299] [2024-11-17 03:25:43,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916267299] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:25:43,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:25:43,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:25:43,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813879262] [2024-11-17 03:25:43,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:25:43,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:25:43,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:43,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:25:43,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:25:43,214 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 74 [2024-11-17 03:25:43,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 149 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) [2024-11-17 03:25:43,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:43,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 74 [2024-11-17 03:25:43,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:43,426 INFO L124 PetriNetUnfolderBase]: 64/263 cut-off events. [2024-11-17 03:25:43,426 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:25:43,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 263 events. 64/263 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1321 event pairs, 63 based on Foata normal form. 1/208 useless extension candidates. Maximal degree in co-relation 376. Up to 151 conditions per place. [2024-11-17 03:25:43,431 INFO L140 encePairwiseOnDemand]: 65/74 looper letters, 24 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2024-11-17 03:25:43,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 68 transitions, 195 flow [2024-11-17 03:25:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:25:43,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:25:43,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2024-11-17 03:25:43,455 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7027027027027027 [2024-11-17 03:25:43,462 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 149 flow. Second operand 3 states and 156 transitions. [2024-11-17 03:25:43,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 68 transitions, 195 flow [2024-11-17 03:25:43,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 68 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:25:43,473 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 146 flow [2024-11-17 03:25:43,477 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2024-11-17 03:25:43,482 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -3 predicate places. [2024-11-17 03:25:43,483 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 146 flow [2024-11-17 03:25:43,484 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) [2024-11-17 03:25:43,484 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:43,484 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:25:43,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:25:43,485 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:25:43,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:43,486 INFO L85 PathProgramCache]: Analyzing trace with hash 12957753, now seen corresponding path program 1 times [2024-11-17 03:25:43,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:43,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852401421] [2024-11-17 03:25:43,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:43,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:43,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:43,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852401421] [2024-11-17 03:25:43,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852401421] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:25:43,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:25:43,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:25:43,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064225405] [2024-11-17 03:25:43,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:25:43,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:25:43,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:43,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:25:43,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:25:43,722 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 74 [2024-11-17 03:25:43,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:25:43,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:43,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 74 [2024-11-17 03:25:43,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:43,851 INFO L124 PetriNetUnfolderBase]: 64/259 cut-off events. [2024-11-17 03:25:43,852 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:25:43,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 259 events. 64/259 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1293 event pairs, 63 based on Foata normal form. 4/207 useless extension candidates. Maximal degree in co-relation 386. Up to 151 conditions per place. [2024-11-17 03:25:43,855 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 22 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2024-11-17 03:25:43,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 64 transitions, 190 flow [2024-11-17 03:25:43,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:25:43,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:25:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 159 transitions. [2024-11-17 03:25:43,858 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7162162162162162 [2024-11-17 03:25:43,858 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 146 flow. Second operand 3 states and 159 transitions. [2024-11-17 03:25:43,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 64 transitions, 190 flow [2024-11-17 03:25:43,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 64 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:25:43,860 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 138 flow [2024-11-17 03:25:43,860 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-11-17 03:25:43,861 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -7 predicate places. [2024-11-17 03:25:43,861 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 138 flow [2024-11-17 03:25:43,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:25:43,862 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:43,862 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-17 03:25:43,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:25:43,863 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:25:43,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:43,864 INFO L85 PathProgramCache]: Analyzing trace with hash -432490745, now seen corresponding path program 1 times [2024-11-17 03:25:43,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:43,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653210466] [2024-11-17 03:25:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:43,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:44,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:44,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653210466] [2024-11-17 03:25:44,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653210466] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:25:44,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:25:44,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:25:44,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721096066] [2024-11-17 03:25:44,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:25:44,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:25:44,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:44,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:25:44,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:25:44,192 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 74 [2024-11-17 03:25:44,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 40.833333333333336) internal successors, (245), 6 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:25:44,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:44,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 74 [2024-11-17 03:25:44,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:44,319 INFO L124 PetriNetUnfolderBase]: 73/281 cut-off events. [2024-11-17 03:25:44,320 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-17 03:25:44,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 281 events. 73/281 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1412 event pairs, 72 based on Foata normal form. 1/230 useless extension candidates. Maximal degree in co-relation 429. Up to 173 conditions per place. [2024-11-17 03:25:44,324 INFO L140 encePairwiseOnDemand]: 69/74 looper letters, 28 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2024-11-17 03:25:44,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 188 flow [2024-11-17 03:25:44,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:25:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:25:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2024-11-17 03:25:44,327 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6891891891891891 [2024-11-17 03:25:44,328 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 138 flow. Second operand 3 states and 153 transitions. [2024-11-17 03:25:44,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 188 flow [2024-11-17 03:25:44,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 60 transitions, 180 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:25:44,329 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 124 flow [2024-11-17 03:25:44,330 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-11-17 03:25:44,331 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -11 predicate places. [2024-11-17 03:25:44,331 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 124 flow [2024-11-17 03:25:44,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.833333333333336) internal successors, (245), 6 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:25:44,332 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:44,332 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-17 03:25:44,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-17 03:25:44,333 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:25:44,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:44,333 INFO L85 PathProgramCache]: Analyzing trace with hash -432490744, now seen corresponding path program 1 times [2024-11-17 03:25:44,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:44,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096881162] [2024-11-17 03:25:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:44,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:44,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:44,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096881162] [2024-11-17 03:25:44,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096881162] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:25:44,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:25:44,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:25:44,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032187350] [2024-11-17 03:25:44,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:25:44,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:25:44,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:44,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:25:44,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:25:44,737 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 74 [2024-11-17 03:25:44,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 124 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) [2024-11-17 03:25:44,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:44,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 74 [2024-11-17 03:25:44,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:44,878 INFO L124 PetriNetUnfolderBase]: 64/268 cut-off events. [2024-11-17 03:25:44,879 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:25:44,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 268 events. 64/268 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1237 event pairs, 63 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 430. Up to 156 conditions per place. [2024-11-17 03:25:44,881 INFO L140 encePairwiseOnDemand]: 65/74 looper letters, 30 selfloop transitions, 6 changer transitions 0/67 dead transitions. [2024-11-17 03:25:44,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 67 transitions, 210 flow [2024-11-17 03:25:44,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:25:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:25:44,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 183 transitions. [2024-11-17 03:25:44,883 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6182432432432432 [2024-11-17 03:25:44,883 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 124 flow. Second operand 4 states and 183 transitions. [2024-11-17 03:25:44,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 67 transitions, 210 flow [2024-11-17 03:25:44,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 67 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:25:44,887 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 171 flow [2024-11-17 03:25:44,887 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=171, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-11-17 03:25:44,888 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -7 predicate places. [2024-11-17 03:25:44,888 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 171 flow [2024-11-17 03:25:44,888 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) [2024-11-17 03:25:44,888 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:44,889 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:25:44,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:25:44,889 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:25:44,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:44,889 INFO L85 PathProgramCache]: Analyzing trace with hash 507818884, now seen corresponding path program 1 times [2024-11-17 03:25:44,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:44,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672242562] [2024-11-17 03:25:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:44,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:45,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:45,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672242562] [2024-11-17 03:25:45,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672242562] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:25:45,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:25:45,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 03:25:45,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881459713] [2024-11-17 03:25:45,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:25:45,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:25:45,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:45,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:25:45,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-17 03:25:45,404 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 74 [2024-11-17 03:25:45,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 171 flow. Second operand has 7 states, 7 states have (on average 39.285714285714285) internal successors, (275), 7 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:25:45,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:45,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 74 [2024-11-17 03:25:45,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:45,553 INFO L124 PetriNetUnfolderBase]: 64/264 cut-off events. [2024-11-17 03:25:45,553 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-17 03:25:45,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 264 events. 64/264 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1206 event pairs, 63 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 447. Up to 148 conditions per place. [2024-11-17 03:25:45,556 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 23 selfloop transitions, 11 changer transitions 0/63 dead transitions. [2024-11-17 03:25:45,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 63 transitions, 235 flow [2024-11-17 03:25:45,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:25:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:25:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 297 transitions. [2024-11-17 03:25:45,558 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5733590733590733 [2024-11-17 03:25:45,559 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 171 flow. Second operand 7 states and 297 transitions. [2024-11-17 03:25:45,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 63 transitions, 235 flow [2024-11-17 03:25:45,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 63 transitions, 233 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:25:45,562 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 187 flow [2024-11-17 03:25:45,563 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=187, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2024-11-17 03:25:45,564 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -4 predicate places. [2024-11-17 03:25:45,565 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 187 flow [2024-11-17 03:25:45,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.285714285714285) internal successors, (275), 7 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:25:45,565 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:45,565 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:25:45,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 03:25:45,566 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:25:45,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:45,566 INFO L85 PathProgramCache]: Analyzing trace with hash 507818885, now seen corresponding path program 1 times [2024-11-17 03:25:45,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:45,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431872097] [2024-11-17 03:25:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:45,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:45,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:45,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431872097] [2024-11-17 03:25:45,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431872097] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:25:45,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:25:45,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 03:25:45,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993634941] [2024-11-17 03:25:45,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:25:45,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:25:45,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:45,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:25:45,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-17 03:25:46,395 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 74 [2024-11-17 03:25:46,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 187 flow. Second operand has 7 states, 7 states have (on average 36.285714285714285) internal successors, (254), 7 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:25:46,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:46,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 74 [2024-11-17 03:25:46,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:46,549 INFO L124 PetriNetUnfolderBase]: 64/260 cut-off events. [2024-11-17 03:25:46,549 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-17 03:25:46,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 260 events. 64/260 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1193 event pairs, 63 based on Foata normal form. 2/216 useless extension candidates. Maximal degree in co-relation 452. Up to 148 conditions per place. [2024-11-17 03:25:46,551 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 22 selfloop transitions, 11 changer transitions 0/61 dead transitions. [2024-11-17 03:25:46,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 61 transitions, 249 flow [2024-11-17 03:25:46,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:25:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:25:46,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 275 transitions. [2024-11-17 03:25:46,553 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5308880308880309 [2024-11-17 03:25:46,553 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 187 flow. Second operand 7 states and 275 transitions. [2024-11-17 03:25:46,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 61 transitions, 249 flow [2024-11-17 03:25:46,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 61 transitions, 227 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:25:46,558 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 183 flow [2024-11-17 03:25:46,558 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=63, 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=183, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2024-11-17 03:25:46,559 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -6 predicate places. [2024-11-17 03:25:46,560 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 183 flow [2024-11-17 03:25:46,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.285714285714285) internal successors, (254), 7 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:25:46,560 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:46,560 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:25:46,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:25:46,561 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:25:46,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:46,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1612309678, now seen corresponding path program 1 times [2024-11-17 03:25:46,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:46,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333910673] [2024-11-17 03:25:46,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:46,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:46,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:46,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333910673] [2024-11-17 03:25:46,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333910673] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:25:46,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:25:46,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:25:46,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161334733] [2024-11-17 03:25:46,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:25:46,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:25:46,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:46,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:25:46,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:25:46,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 74 [2024-11-17 03:25:46,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:25:46,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:46,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 74 [2024-11-17 03:25:46,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:46,888 INFO L124 PetriNetUnfolderBase]: 64/258 cut-off events. [2024-11-17 03:25:46,888 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-17 03:25:46,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 258 events. 64/258 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1175 event pairs, 63 based on Foata normal form. 2/216 useless extension candidates. Maximal degree in co-relation 450. Up to 150 conditions per place. [2024-11-17 03:25:46,890 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 22 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2024-11-17 03:25:46,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 60 transitions, 247 flow [2024-11-17 03:25:46,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:25:46,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:25:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 229 transitions. [2024-11-17 03:25:46,891 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6189189189189189 [2024-11-17 03:25:46,892 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 183 flow. Second operand 5 states and 229 transitions. [2024-11-17 03:25:46,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 60 transitions, 247 flow [2024-11-17 03:25:46,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 60 transitions, 225 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:25:46,893 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 181 flow [2024-11-17 03:25:46,894 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2024-11-17 03:25:46,894 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -9 predicate places. [2024-11-17 03:25:46,895 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 181 flow [2024-11-17 03:25:46,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:25:46,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:46,895 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:25:46,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-17 03:25:46,896 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:25:46,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:46,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1612309677, now seen corresponding path program 1 times [2024-11-17 03:25:46,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:46,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107464775] [2024-11-17 03:25:46,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:46,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:47,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:47,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107464775] [2024-11-17 03:25:47,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107464775] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:25:47,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:25:47,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:25:47,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968141359] [2024-11-17 03:25:47,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:25:47,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:25:47,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:47,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:25:47,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:25:47,220 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 74 [2024-11-17 03:25:47,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:25:47,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:47,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 74 [2024-11-17 03:25:47,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:47,329 INFO L124 PetriNetUnfolderBase]: 64/256 cut-off events. [2024-11-17 03:25:47,330 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-17 03:25:47,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 256 events. 64/256 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1171 event pairs, 63 based on Foata normal form. 2/214 useless extension candidates. Maximal degree in co-relation 444. Up to 150 conditions per place. [2024-11-17 03:25:47,332 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 20 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-11-17 03:25:47,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 59 transitions, 241 flow [2024-11-17 03:25:47,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:25:47,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:25:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 257 transitions. [2024-11-17 03:25:47,336 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6945945945945946 [2024-11-17 03:25:47,337 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 181 flow. Second operand 5 states and 257 transitions. [2024-11-17 03:25:47,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 59 transitions, 241 flow [2024-11-17 03:25:47,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 59 transitions, 219 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:25:47,339 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 179 flow [2024-11-17 03:25:47,340 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=61, 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=5, PETRI_FLOW=179, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-11-17 03:25:47,340 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -10 predicate places. [2024-11-17 03:25:47,340 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 179 flow [2024-11-17 03:25:47,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:25:47,341 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:47,341 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:25:47,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:25:47,342 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:25:47,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:47,342 INFO L85 PathProgramCache]: Analyzing trace with hash 405109274, now seen corresponding path program 1 times [2024-11-17 03:25:47,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:47,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702484648] [2024-11-17 03:25:47,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:47,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:47,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:47,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702484648] [2024-11-17 03:25:47,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702484648] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:25:47,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721334014] [2024-11-17 03:25:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:47,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:25:47,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:25:47,777 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:25:47,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:25:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:47,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-17 03:25:47,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:25:48,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:25:48,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:25:48,087 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:25:48,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-17 03:25:48,115 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:25:48,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:25:48,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:25:48,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:25:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:48,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:25:48,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:25:48,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-17 03:25:48,658 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-17 03:25:48,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-17 03:25:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:48,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721334014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:25:48,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:25:48,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 16 [2024-11-17 03:25:48,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971080905] [2024-11-17 03:25:48,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:25:48,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-17 03:25:48,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:48,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-17 03:25:48,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-11-17 03:25:50,429 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 74 [2024-11-17 03:25:50,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 179 flow. Second operand has 18 states, 18 states have (on average 36.833333333333336) internal successors, (663), 18 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:25:50,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:50,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 74 [2024-11-17 03:25:50,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:50,882 INFO L124 PetriNetUnfolderBase]: 75/316 cut-off events. [2024-11-17 03:25:50,882 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2024-11-17 03:25:50,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 316 events. 75/316 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1486 event pairs, 72 based on Foata normal form. 7/275 useless extension candidates. Maximal degree in co-relation 575. Up to 171 conditions per place. [2024-11-17 03:25:50,884 INFO L140 encePairwiseOnDemand]: 64/74 looper letters, 45 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2024-11-17 03:25:50,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 81 transitions, 397 flow [2024-11-17 03:25:50,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:25:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:25:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 344 transitions. [2024-11-17 03:25:50,886 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.581081081081081 [2024-11-17 03:25:50,886 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 179 flow. Second operand 8 states and 344 transitions. [2024-11-17 03:25:50,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 81 transitions, 397 flow [2024-11-17 03:25:50,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 81 transitions, 343 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:25:50,889 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 219 flow [2024-11-17 03:25:50,889 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=219, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2024-11-17 03:25:50,890 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -4 predicate places. [2024-11-17 03:25:50,890 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 219 flow [2024-11-17 03:25:50,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 36.833333333333336) internal successors, (663), 18 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:25:50,891 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:50,891 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:25:50,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:25:51,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:25:51,096 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:25:51,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:51,097 INFO L85 PathProgramCache]: Analyzing trace with hash 2026309638, now seen corresponding path program 1 times [2024-11-17 03:25:51,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:51,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384834260] [2024-11-17 03:25:51,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:51,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:51,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:51,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384834260] [2024-11-17 03:25:51,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384834260] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:25:51,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862477370] [2024-11-17 03:25:51,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:51,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:25:51,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:25:51,236 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:25:51,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:25:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:51,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-17 03:25:51,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:25:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:51,478 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:25:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:51,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862477370] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:25:51,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:25:51,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-17 03:25:51,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132599573] [2024-11-17 03:25:51,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:25:51,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:25:51,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:51,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:25:51,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:25:51,562 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 74 [2024-11-17 03:25:51,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 219 flow. Second operand has 9 states, 9 states have (on average 50.888888888888886) internal successors, (458), 9 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:25:51,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:25:51,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 74 [2024-11-17 03:25:51,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:25:51,754 INFO L124 PetriNetUnfolderBase]: 64/302 cut-off events. [2024-11-17 03:25:51,755 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-11-17 03:25:51,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 302 events. 64/302 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1111 event pairs, 63 based on Foata normal form. 4/262 useless extension candidates. Maximal degree in co-relation 559. Up to 147 conditions per place. [2024-11-17 03:25:51,756 INFO L140 encePairwiseOnDemand]: 70/74 looper letters, 55 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2024-11-17 03:25:51,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 89 transitions, 441 flow [2024-11-17 03:25:51,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:25:51,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:25:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 435 transitions. [2024-11-17 03:25:51,758 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7347972972972973 [2024-11-17 03:25:51,758 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 219 flow. Second operand 8 states and 435 transitions. [2024-11-17 03:25:51,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 89 transitions, 441 flow [2024-11-17 03:25:51,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 89 transitions, 429 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-17 03:25:51,762 INFO L231 Difference]: Finished difference. Result has 81 places, 64 transitions, 253 flow [2024-11-17 03:25:51,762 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=253, PETRI_PLACES=81, PETRI_TRANSITIONS=64} [2024-11-17 03:25:51,763 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 6 predicate places. [2024-11-17 03:25:51,763 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 64 transitions, 253 flow [2024-11-17 03:25:51,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 50.888888888888886) internal successors, (458), 9 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:25:51,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:25:51,764 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2024-11-17 03:25:51,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-17 03:25:51,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-17 03:25:51,965 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:25:51,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:25:51,965 INFO L85 PathProgramCache]: Analyzing trace with hash -2004408184, now seen corresponding path program 2 times [2024-11-17 03:25:51,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:25:51,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452320684] [2024-11-17 03:25:51,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:25:51,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:25:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:25:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:54,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:25:54,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452320684] [2024-11-17 03:25:54,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452320684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:25:54,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181934492] [2024-11-17 03:25:54,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:25:54,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:25:54,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:25:54,038 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:25:54,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:25:54,343 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:25:54,343 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:25:54,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-17 03:25:54,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:25:54,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:25:54,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:25:54,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:25:54,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:25:54,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:25:54,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:25:54,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:25:54,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:25:54,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:25:54,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:25:54,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:25:54,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:25:54,871 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:25:54,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:25:54,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:25:54,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-17 03:25:54,961 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:25:54,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-17 03:25:54,972 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:25:54,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:25:55,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:25:55,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:25:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:55,159 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:25:55,409 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:25:55,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-17 03:25:55,471 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-17 03:25:55,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-17 03:25:55,662 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:25:55,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-17 03:25:55,721 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-17 03:25:55,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-17 03:25:55,927 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:25:55,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-17 03:25:56,004 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-17 03:25:56,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-17 03:25:56,238 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:25:56,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-17 03:25:56,316 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-17 03:25:56,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-17 03:25:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:25:56,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181934492] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:25:56,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:25:56,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 10] total 40 [2024-11-17 03:25:56,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839493293] [2024-11-17 03:25:56,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:25:56,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-17 03:25:56,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:25:56,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-17 03:25:56,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2024-11-17 03:26:02,793 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 74 [2024-11-17 03:26:02,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 64 transitions, 253 flow. Second operand has 42 states, 42 states have (on average 37.285714285714285) internal successors, (1566), 42 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:02,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:02,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 74 [2024-11-17 03:26:02,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:04,078 INFO L124 PetriNetUnfolderBase]: 77/386 cut-off events. [2024-11-17 03:26:04,078 INFO L125 PetriNetUnfolderBase]: For 385/385 co-relation queries the response was YES. [2024-11-17 03:26:04,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 386 events. 77/386 cut-off events. For 385/385 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1488 event pairs, 72 based on Foata normal form. 6/344 useless extension candidates. Maximal degree in co-relation 793. Up to 173 conditions per place. [2024-11-17 03:26:04,080 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 79 selfloop transitions, 24 changer transitions 0/127 dead transitions. [2024-11-17 03:26:04,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 127 transitions, 791 flow [2024-11-17 03:26:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-17 03:26:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-17 03:26:04,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 704 transitions. [2024-11-17 03:26:04,082 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5596184419713831 [2024-11-17 03:26:04,082 INFO L175 Difference]: Start difference. First operand has 81 places, 64 transitions, 253 flow. Second operand 17 states and 704 transitions. [2024-11-17 03:26:04,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 127 transitions, 791 flow [2024-11-17 03:26:04,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 127 transitions, 785 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:26:04,086 INFO L231 Difference]: Finished difference. Result has 105 places, 77 transitions, 435 flow [2024-11-17 03:26:04,086 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=435, PETRI_PLACES=105, PETRI_TRANSITIONS=77} [2024-11-17 03:26:04,087 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 30 predicate places. [2024-11-17 03:26:04,087 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 77 transitions, 435 flow [2024-11-17 03:26:04,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 37.285714285714285) internal successors, (1566), 42 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:04,088 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:04,088 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:04,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:26:04,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:26:04,289 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:04,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:04,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1150502534, now seen corresponding path program 2 times [2024-11-17 03:26:04,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:04,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525455303] [2024-11-17 03:26:04,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:04,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:26:04,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:04,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525455303] [2024-11-17 03:26:04,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525455303] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:26:04,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642195513] [2024-11-17 03:26:04,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:26:04,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:26:04,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:26:04,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:26:04,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:26:05,080 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:26:05,080 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:26:05,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:26:05,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:26:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:26:05,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:26:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:26:05,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642195513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:26:05,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:26:05,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-17 03:26:05,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060808104] [2024-11-17 03:26:05,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:26:05,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:26:05,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:05,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:26:05,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:26:05,337 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 74 [2024-11-17 03:26:05,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 77 transitions, 435 flow. Second operand has 13 states, 13 states have (on average 52.07692307692308) internal successors, (677), 13 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:05,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:05,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 74 [2024-11-17 03:26:05,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:05,607 INFO L124 PetriNetUnfolderBase]: 64/348 cut-off events. [2024-11-17 03:26:05,607 INFO L125 PetriNetUnfolderBase]: For 585/585 co-relation queries the response was YES. [2024-11-17 03:26:05,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 348 events. 64/348 cut-off events. For 585/585 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1112 event pairs, 63 based on Foata normal form. 4/308 useless extension candidates. Maximal degree in co-relation 767. Up to 147 conditions per place. [2024-11-17 03:26:05,610 INFO L140 encePairwiseOnDemand]: 70/74 looper letters, 80 selfloop transitions, 12 changer transitions 0/118 dead transitions. [2024-11-17 03:26:05,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 118 transitions, 829 flow [2024-11-17 03:26:05,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:26:05,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:26:05,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 647 transitions. [2024-11-17 03:26:05,613 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7286036036036037 [2024-11-17 03:26:05,613 INFO L175 Difference]: Start difference. First operand has 105 places, 77 transitions, 435 flow. Second operand 12 states and 647 transitions. [2024-11-17 03:26:05,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 118 transitions, 829 flow [2024-11-17 03:26:05,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 118 transitions, 795 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-17 03:26:05,619 INFO L231 Difference]: Finished difference. Result has 115 places, 74 transitions, 431 flow [2024-11-17 03:26:05,619 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=431, PETRI_PLACES=115, PETRI_TRANSITIONS=74} [2024-11-17 03:26:05,620 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 40 predicate places. [2024-11-17 03:26:05,621 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 74 transitions, 431 flow [2024-11-17 03:26:05,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 52.07692307692308) internal successors, (677), 13 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:05,621 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:05,621 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1] [2024-11-17 03:26:05,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-17 03:26:05,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:26:05,823 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:05,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:05,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2036671800, now seen corresponding path program 3 times [2024-11-17 03:26:05,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:05,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627764878] [2024-11-17 03:26:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:05,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 444 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:26:06,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:06,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627764878] [2024-11-17 03:26:06,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627764878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:26:06,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974717134] [2024-11-17 03:26:06,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:26:06,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:26:06,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:26:06,592 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:26:06,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process