./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d 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_11-arraylist_nr.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c4f9d381010c40c0aeec814019363f065d1b11569cf33ee927950bcd4ef29f20 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:39:44,170 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:39:44,261 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:39:44,265 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:39:44,266 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:39:44,285 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:39:44,286 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:39:44,286 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:39:44,286 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:39:44,287 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:39:44,287 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:39:44,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:39:44,288 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:39:44,288 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:39:44,289 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:39:44,289 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:39:44,290 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:39:44,290 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:39:44,290 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:39:44,291 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:39:44,291 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:39:44,291 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:39:44,292 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:39:44,292 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:39:44,292 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:39:44,292 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:39:44,293 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:39:44,293 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:39:44,293 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:39:44,294 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:39:44,294 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:39:44,294 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:39:44,294 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:39:44,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:39:44,295 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:39:44,295 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:39:44,296 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:39:44,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:39:44,296 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:39:44,297 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:39:44,297 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:39:44,297 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:39:44,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c4f9d381010c40c0aeec814019363f065d1b11569cf33ee927950bcd4ef29f20 [2024-11-09 10:39:44,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:39:44,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:39:44,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:39:44,577 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:39:44,578 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:39:44,579 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2024-11-09 10:39:46,075 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:39:46,413 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:39:46,416 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2024-11-09 10:39:46,434 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0856bf5f5/03c989fda5b7455aa0ef9fc187dfe47c/FLAG115fa4936 [2024-11-09 10:39:46,648 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0856bf5f5/03c989fda5b7455aa0ef9fc187dfe47c [2024-11-09 10:39:46,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:39:46,653 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:39:46,654 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:39:46,654 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:39:46,659 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:39:46,660 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:39:46" (1/1) ... [2024-11-09 10:39:46,661 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50f4466b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:46, skipping insertion in model container [2024-11-09 10:39:46,661 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:39:46" (1/1) ... [2024-11-09 10:39:46,719 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:39:47,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:39:47,501 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:39:47,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:39:47,635 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:39:47,636 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:47 WrapperNode [2024-11-09 10:39:47,636 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:39:47,637 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:39:47,637 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:39:47,638 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:39:47,644 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:47" (1/1) ... [2024-11-09 10:39:47,670 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:47" (1/1) ... [2024-11-09 10:39:47,709 INFO L138 Inliner]: procedures = 372, calls = 88, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 188 [2024-11-09 10:39:47,710 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:39:47,711 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:39:47,711 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:39:47,711 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:39:47,721 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:47" (1/1) ... [2024-11-09 10:39:47,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:47" (1/1) ... [2024-11-09 10:39:47,726 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:47" (1/1) ... [2024-11-09 10:39:47,750 INFO L175 MemorySlicer]: Split 78 memory accesses to 3 slices as follows [50, 14, 14]. 64 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [50, 10, 0]. The 11 writes are split as follows [0, 1, 10]. [2024-11-09 10:39:47,750 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:47" (1/1) ... [2024-11-09 10:39:47,751 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:47" (1/1) ... [2024-11-09 10:39:47,767 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:47" (1/1) ... [2024-11-09 10:39:47,770 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:47" (1/1) ... [2024-11-09 10:39:47,773 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:47" (1/1) ... [2024-11-09 10:39:47,774 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:47" (1/1) ... [2024-11-09 10:39:47,778 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:39:47,779 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:39:47,779 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:39:47,779 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:39:47,780 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:47" (1/1) ... [2024-11-09 10:39:47,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:39:47,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:39:47,821 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) [2024-11-09 10:39:47,824 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 [2024-11-09 10:39:47,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-09 10:39:47,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-09 10:39:47,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-09 10:39:47,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-09 10:39:47,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-09 10:39:47,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-09 10:39:47,876 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-09 10:39:47,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:39:47,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:39:47,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-09 10:39:47,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:39:47,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:39:47,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-09 10:39:47,876 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-09 10:39:47,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:39:47,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:39:47,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-09 10:39:47,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-09 10:39:47,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-09 10:39:47,877 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-09 10:39:47,877 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-09 10:39:47,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:39:47,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:39:47,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-09 10:39:47,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:39:47,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:39:47,881 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:39:48,083 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:39:48,085 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:39:48,562 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:39:48,562 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:39:48,920 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:39:48,921 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 10:39:48,921 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:39:48 BoogieIcfgContainer [2024-11-09 10:39:48,921 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:39:48,923 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:39:48,923 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:39:48,926 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:39:48,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:39:46" (1/3) ... [2024-11-09 10:39:48,927 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db50940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:39:48, skipping insertion in model container [2024-11-09 10:39:48,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:47" (2/3) ... [2024-11-09 10:39:48,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db50940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:39:48, skipping insertion in model container [2024-11-09 10:39:48,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:39:48" (3/3) ... [2024-11-09 10:39:48,929 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_11-arraylist_nr.i [2024-11-09 10:39:48,944 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:39:48,944 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2024-11-09 10:39:48,944 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:39:49,021 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-09 10:39:49,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 150 flow [2024-11-09 10:39:49,100 INFO L124 PetriNetUnfolderBase]: 2/72 cut-off events. [2024-11-09 10:39:49,100 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:39:49,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 72 events. 2/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 292 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2024-11-09 10:39:49,103 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 73 transitions, 150 flow [2024-11-09 10:39:49,108 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 72 transitions, 147 flow [2024-11-09 10:39:49,120 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:39:49,129 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;@6a9c2038, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:39:49,129 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-09 10:39:49,135 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:39:49,136 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-09 10:39:49,136 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:39:49,136 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:49,137 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-09 10:39:49,138 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:49,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:49,143 INFO L85 PathProgramCache]: Analyzing trace with hash 16302237, now seen corresponding path program 1 times [2024-11-09 10:39:49,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:49,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623131827] [2024-11-09 10:39:49,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:49,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:49,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:49,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623131827] [2024-11-09 10:39:49,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623131827] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:49,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:49,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:39:49,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160957564] [2024-11-09 10:39:49,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:49,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:39:49,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:49,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:39:49,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:39:49,529 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2024-11-09 10:39:49,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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) [2024-11-09 10:39:49,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:49,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2024-11-09 10:39:49,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:49,696 INFO L124 PetriNetUnfolderBase]: 65/268 cut-off events. [2024-11-09 10:39:49,697 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:39:49,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 268 events. 65/268 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1342 event pairs, 63 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 376. Up to 155 conditions per place. [2024-11-09 10:39:49,701 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 27 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2024-11-09 10:39:49,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 207 flow [2024-11-09 10:39:49,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:39:49,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:39:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2024-11-09 10:39:49,716 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7534246575342466 [2024-11-09 10:39:49,718 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 147 flow. Second operand 3 states and 165 transitions. [2024-11-09 10:39:49,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 207 flow [2024-11-09 10:39:49,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:39:49,729 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 158 flow [2024-11-09 10:39:49,731 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2024-11-09 10:39:49,735 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2024-11-09 10:39:49,735 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 158 flow [2024-11-09 10:39:49,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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) [2024-11-09 10:39:49,736 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:49,736 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 10:39:49,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:39:49,737 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:49,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:49,737 INFO L85 PathProgramCache]: Analyzing trace with hash 505321502, now seen corresponding path program 1 times [2024-11-09 10:39:49,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:49,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983968823] [2024-11-09 10:39:49,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:49,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:49,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:49,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:49,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983968823] [2024-11-09 10:39:49,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983968823] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:39:49,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170785096] [2024-11-09 10:39:49,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:49,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:49,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:39:49,874 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) [2024-11-09 10:39:49,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:39:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:50,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 10:39:50,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:39:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:50,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:39:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:50,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170785096] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:39:50,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:39:50,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 10:39:50,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043609844] [2024-11-09 10:39:50,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:39:50,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:39:50,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:50,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:39:50,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-09 10:39:50,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2024-11-09 10:39:50,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 158 flow. Second operand has 7 states, 7 states have (on average 46.285714285714285) internal successors, (324), 7 states have internal predecessors, (324), 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) [2024-11-09 10:39:50,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:50,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2024-11-09 10:39:50,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:50,302 INFO L124 PetriNetUnfolderBase]: 65/271 cut-off events. [2024-11-09 10:39:50,302 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:39:50,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 271 events. 65/271 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1335 event pairs, 63 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 432. Up to 155 conditions per place. [2024-11-09 10:39:50,307 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 27 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2024-11-09 10:39:50,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 76 transitions, 234 flow [2024-11-09 10:39:50,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:39:50,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:39:50,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 305 transitions. [2024-11-09 10:39:50,311 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6963470319634704 [2024-11-09 10:39:50,312 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 158 flow. Second operand 6 states and 305 transitions. [2024-11-09 10:39:50,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 76 transitions, 234 flow [2024-11-09 10:39:50,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 76 transitions, 230 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-09 10:39:50,317 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 190 flow [2024-11-09 10:39:50,317 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=83, PETRI_TRANSITIONS=76} [2024-11-09 10:39:50,319 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 9 predicate places. [2024-11-09 10:39:50,322 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 190 flow [2024-11-09 10:39:50,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 46.285714285714285) internal successors, (324), 7 states have internal predecessors, (324), 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) [2024-11-09 10:39:50,323 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:50,323 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-09 10:39:50,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:39:50,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:50,528 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:50,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:50,529 INFO L85 PathProgramCache]: Analyzing trace with hash 124983517, now seen corresponding path program 2 times [2024-11-09 10:39:50,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:50,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303422718] [2024-11-09 10:39:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:50,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 10:39:50,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:50,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303422718] [2024-11-09 10:39:50,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303422718] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:50,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:50,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:39:50,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040805153] [2024-11-09 10:39:50,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:50,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:39:50,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:50,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:39:50,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:39:50,692 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 73 [2024-11-09 10:39:50,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2024-11-09 10:39:50,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:50,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 73 [2024-11-09 10:39:50,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:50,813 INFO L124 PetriNetUnfolderBase]: 65/267 cut-off events. [2024-11-09 10:39:50,813 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:39:50,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 267 events. 65/267 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1314 event pairs, 63 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 421. Up to 157 conditions per place. [2024-11-09 10:39:50,820 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 30 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2024-11-09 10:39:50,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 250 flow [2024-11-09 10:39:50,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:39:50,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:39:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2024-11-09 10:39:50,823 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6894977168949772 [2024-11-09 10:39:50,826 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 190 flow. Second operand 3 states and 151 transitions. [2024-11-09 10:39:50,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 250 flow [2024-11-09 10:39:50,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 72 transitions, 236 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-09 10:39:50,829 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 176 flow [2024-11-09 10:39:50,831 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2024-11-09 10:39:50,831 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2024-11-09 10:39:50,832 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 176 flow [2024-11-09 10:39:50,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2024-11-09 10:39:50,832 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:50,833 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-09 10:39:50,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:39:50,833 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:50,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:50,834 INFO L85 PathProgramCache]: Analyzing trace with hash 124983518, now seen corresponding path program 1 times [2024-11-09 10:39:50,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:50,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211314219] [2024-11-09 10:39:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:50,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:50,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:50,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211314219] [2024-11-09 10:39:50,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211314219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:39:50,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012349088] [2024-11-09 10:39:50,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:50,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:50,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:39:50,968 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) [2024-11-09 10:39:50,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:39:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:51,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 10:39:51,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:39:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:51,109 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:39:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:39:51,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012349088] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:39:51,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:39:51,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-09 10:39:51,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98239923] [2024-11-09 10:39:51,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:39:51,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:39:51,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:51,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:39:51,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:39:51,182 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2024-11-09 10:39:51,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 176 flow. Second operand has 13 states, 13 states have (on average 46.15384615384615) internal successors, (600), 13 states have internal predecessors, (600), 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) [2024-11-09 10:39:51,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:51,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2024-11-09 10:39:51,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:51,324 INFO L124 PetriNetUnfolderBase]: 65/273 cut-off events. [2024-11-09 10:39:51,324 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-09 10:39:51,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 273 events. 65/273 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1345 event pairs, 63 based on Foata normal form. 6/221 useless extension candidates. Maximal degree in co-relation 431. Up to 155 conditions per place. [2024-11-09 10:39:51,328 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 27 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-11-09 10:39:51,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 78 transitions, 288 flow [2024-11-09 10:39:51,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 10:39:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 10:39:51,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 584 transitions. [2024-11-09 10:39:51,333 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-09 10:39:51,334 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 176 flow. Second operand 12 states and 584 transitions. [2024-11-09 10:39:51,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 78 transitions, 288 flow [2024-11-09 10:39:51,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 78 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:39:51,338 INFO L231 Difference]: Finished difference. Result has 95 places, 78 transitions, 252 flow [2024-11-09 10:39:51,339 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=252, PETRI_PLACES=95, PETRI_TRANSITIONS=78} [2024-11-09 10:39:51,340 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2024-11-09 10:39:51,342 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 78 transitions, 252 flow [2024-11-09 10:39:51,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 46.15384615384615) internal successors, (600), 13 states have internal predecessors, (600), 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) [2024-11-09 10:39:51,342 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:51,342 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-11-09 10:39:51,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:39:51,543 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,SelfDestructingSolverStorable3 [2024-11-09 10:39:51,543 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:51,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:51,544 INFO L85 PathProgramCache]: Analyzing trace with hash 400564542, now seen corresponding path program 2 times [2024-11-09 10:39:51,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:51,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981504542] [2024-11-09 10:39:51,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:51,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:51,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:51,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981504542] [2024-11-09 10:39:51,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981504542] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:51,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:51,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:39:51,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978255020] [2024-11-09 10:39:51,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:51,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:39:51,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:51,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:39:51,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:39:51,729 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 73 [2024-11-09 10:39:51,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 78 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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) [2024-11-09 10:39:51,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:51,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 73 [2024-11-09 10:39:51,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:51,817 INFO L124 PetriNetUnfolderBase]: 65/269 cut-off events. [2024-11-09 10:39:51,818 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-09 10:39:51,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 269 events. 65/269 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1316 event pairs, 63 based on Foata normal form. 2/214 useless extension candidates. Maximal degree in co-relation 421. Up to 163 conditions per place. [2024-11-09 10:39:51,821 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 34 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2024-11-09 10:39:51,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 74 transitions, 320 flow [2024-11-09 10:39:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:39:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:39:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2024-11-09 10:39:51,822 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7077625570776256 [2024-11-09 10:39:51,822 INFO L175 Difference]: Start difference. First operand has 95 places, 78 transitions, 252 flow. Second operand 3 states and 155 transitions. [2024-11-09 10:39:51,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 74 transitions, 320 flow [2024-11-09 10:39:51,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 74 transitions, 272 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-09 10:39:51,828 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 204 flow [2024-11-09 10:39:51,828 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=88, PETRI_TRANSITIONS=74} [2024-11-09 10:39:51,830 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2024-11-09 10:39:51,830 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 204 flow [2024-11-09 10:39:51,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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) [2024-11-09 10:39:51,831 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:51,831 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:51,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:39:51,831 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:51,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:51,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1604517357, now seen corresponding path program 1 times [2024-11-09 10:39:51,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:51,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660793353] [2024-11-09 10:39:51,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:51,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:52,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:52,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660793353] [2024-11-09 10:39:52,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660793353] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:52,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:52,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:39:52,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054237117] [2024-11-09 10:39:52,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:52,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:39:52,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:52,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:39:52,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-09 10:39:52,393 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 73 [2024-11-09 10:39:52,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 74 transitions, 204 flow. Second operand has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 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) [2024-11-09 10:39:52,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:52,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 73 [2024-11-09 10:39:52,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:52,557 INFO L124 PetriNetUnfolderBase]: 65/277 cut-off events. [2024-11-09 10:39:52,557 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-09 10:39:52,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 277 events. 65/277 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1246 event pairs, 63 based on Foata normal form. 11/235 useless extension candidates. Maximal degree in co-relation 446. Up to 166 conditions per place. [2024-11-09 10:39:52,560 INFO L140 encePairwiseOnDemand]: 59/73 looper letters, 40 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2024-11-09 10:39:52,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 77 transitions, 312 flow [2024-11-09 10:39:52,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:39:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:39:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 221 transitions. [2024-11-09 10:39:52,562 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6054794520547945 [2024-11-09 10:39:52,562 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 204 flow. Second operand 5 states and 221 transitions. [2024-11-09 10:39:52,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 77 transitions, 312 flow [2024-11-09 10:39:52,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 77 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:39:52,565 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 238 flow [2024-11-09 10:39:52,566 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=238, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2024-11-09 10:39:52,566 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2024-11-09 10:39:52,567 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 238 flow [2024-11-09 10:39:52,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 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) [2024-11-09 10:39:52,567 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:52,567 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:52,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 10:39:52,568 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:52,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:52,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1208901084, now seen corresponding path program 1 times [2024-11-09 10:39:52,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:52,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544418864] [2024-11-09 10:39:52,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:52,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:52,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:52,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544418864] [2024-11-09 10:39:52,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544418864] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:52,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:52,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 10:39:52,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69561294] [2024-11-09 10:39:52,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:52,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:39:52,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:52,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:39:52,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 10:39:53,216 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 73 [2024-11-09 10:39:53,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 75 transitions, 238 flow. Second operand has 7 states, 7 states have (on average 37.57142857142857) internal successors, (263), 7 states have internal predecessors, (263), 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) [2024-11-09 10:39:53,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:53,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 73 [2024-11-09 10:39:53,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:53,381 INFO L124 PetriNetUnfolderBase]: 65/273 cut-off events. [2024-11-09 10:39:53,381 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-11-09 10:39:53,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 273 events. 65/273 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1224 event pairs, 63 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 457. Up to 160 conditions per place. [2024-11-09 10:39:53,383 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 35 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-11-09 10:39:53,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 73 transitions, 326 flow [2024-11-09 10:39:53,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:39:53,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:39:53,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 285 transitions. [2024-11-09 10:39:53,385 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5577299412915852 [2024-11-09 10:39:53,385 INFO L175 Difference]: Start difference. First operand has 88 places, 75 transitions, 238 flow. Second operand 7 states and 285 transitions. [2024-11-09 10:39:53,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 73 transitions, 326 flow [2024-11-09 10:39:53,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 73 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:39:53,388 INFO L231 Difference]: Finished difference. Result has 90 places, 73 transitions, 252 flow [2024-11-09 10:39:53,389 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=252, PETRI_PLACES=90, PETRI_TRANSITIONS=73} [2024-11-09 10:39:53,389 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2024-11-09 10:39:53,389 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 73 transitions, 252 flow [2024-11-09 10:39:53,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.57142857142857) internal successors, (263), 7 states have internal predecessors, (263), 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) [2024-11-09 10:39:53,390 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:53,390 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:53,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 10:39:53,391 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:53,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:53,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1208901085, now seen corresponding path program 1 times [2024-11-09 10:39:53,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:53,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370037589] [2024-11-09 10:39:53,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:53,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:53,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:53,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370037589] [2024-11-09 10:39:53,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370037589] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:53,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:53,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 10:39:53,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483546120] [2024-11-09 10:39:53,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:53,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:39:53,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:53,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:39:53,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 10:39:54,251 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 73 [2024-11-09 10:39:54,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 73 transitions, 252 flow. Second operand has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 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) [2024-11-09 10:39:54,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:54,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 73 [2024-11-09 10:39:54,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:54,433 INFO L124 PetriNetUnfolderBase]: 65/269 cut-off events. [2024-11-09 10:39:54,433 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-11-09 10:39:54,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 269 events. 65/269 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1192 event pairs, 63 based on Foata normal form. 2/225 useless extension candidates. Maximal degree in co-relation 462. Up to 160 conditions per place. [2024-11-09 10:39:54,436 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 34 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2024-11-09 10:39:54,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 71 transitions, 338 flow [2024-11-09 10:39:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:39:54,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:39:54,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 263 transitions. [2024-11-09 10:39:54,439 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5146771037181996 [2024-11-09 10:39:54,439 INFO L175 Difference]: Start difference. First operand has 90 places, 73 transitions, 252 flow. Second operand 7 states and 263 transitions. [2024-11-09 10:39:54,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 71 transitions, 338 flow [2024-11-09 10:39:54,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 71 transitions, 316 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:39:54,442 INFO L231 Difference]: Finished difference. Result has 88 places, 71 transitions, 248 flow [2024-11-09 10:39:54,442 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=248, PETRI_PLACES=88, PETRI_TRANSITIONS=71} [2024-11-09 10:39:54,443 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2024-11-09 10:39:54,444 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 71 transitions, 248 flow [2024-11-09 10:39:54,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 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) [2024-11-09 10:39:54,445 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:54,445 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:54,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:39:54,445 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:54,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:54,446 INFO L85 PathProgramCache]: Analyzing trace with hash 2112790591, now seen corresponding path program 1 times [2024-11-09 10:39:54,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:54,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926512059] [2024-11-09 10:39:54,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:54,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:54,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:54,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926512059] [2024-11-09 10:39:54,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926512059] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:54,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:54,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:39:54,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163072543] [2024-11-09 10:39:54,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:54,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:39:54,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:54,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:39:54,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:39:54,720 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-11-09 10:39:54,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 71 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 40.4) internal successors, (202), 5 states have internal predecessors, (202), 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) [2024-11-09 10:39:54,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:54,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-11-09 10:39:54,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:54,842 INFO L124 PetriNetUnfolderBase]: 65/267 cut-off events. [2024-11-09 10:39:54,843 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-11-09 10:39:54,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 267 events. 65/267 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1179 event pairs, 63 based on Foata normal form. 2/225 useless extension candidates. Maximal degree in co-relation 460. Up to 162 conditions per place. [2024-11-09 10:39:54,845 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 34 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2024-11-09 10:39:54,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 70 transitions, 336 flow [2024-11-09 10:39:54,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:39:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:39:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 221 transitions. [2024-11-09 10:39:54,846 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6054794520547945 [2024-11-09 10:39:54,846 INFO L175 Difference]: Start difference. First operand has 88 places, 71 transitions, 248 flow. Second operand 5 states and 221 transitions. [2024-11-09 10:39:54,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 70 transitions, 336 flow [2024-11-09 10:39:54,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 70 transitions, 314 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:39:54,849 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 246 flow [2024-11-09 10:39:54,849 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2024-11-09 10:39:54,851 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 11 predicate places. [2024-11-09 10:39:54,851 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 246 flow [2024-11-09 10:39:54,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.4) internal successors, (202), 5 states have internal predecessors, (202), 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) [2024-11-09 10:39:54,852 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:54,852 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:54,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 10:39:54,852 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:54,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:54,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2112790592, now seen corresponding path program 1 times [2024-11-09 10:39:54,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:54,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322514255] [2024-11-09 10:39:54,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:54,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:55,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:55,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322514255] [2024-11-09 10:39:55,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322514255] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:55,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:55,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:39:55,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061322454] [2024-11-09 10:39:55,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:55,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:39:55,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:55,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:39:55,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:39:55,196 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 73 [2024-11-09 10:39:55,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 246 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) [2024-11-09 10:39:55,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:55,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 73 [2024-11-09 10:39:55,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:55,326 INFO L124 PetriNetUnfolderBase]: 65/265 cut-off events. [2024-11-09 10:39:55,327 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-09 10:39:55,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 507 conditions, 265 events. 65/265 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1174 event pairs, 63 based on Foata normal form. 2/223 useless extension candidates. Maximal degree in co-relation 454. Up to 162 conditions per place. [2024-11-09 10:39:55,329 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 32 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-11-09 10:39:55,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 69 transitions, 330 flow [2024-11-09 10:39:55,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:39:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:39:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 229 transitions. [2024-11-09 10:39:55,331 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6273972602739726 [2024-11-09 10:39:55,331 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 246 flow. Second operand 5 states and 229 transitions. [2024-11-09 10:39:55,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 69 transitions, 330 flow [2024-11-09 10:39:55,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 69 transitions, 308 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:39:55,333 INFO L231 Difference]: Finished difference. Result has 84 places, 69 transitions, 244 flow [2024-11-09 10:39:55,334 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=84, PETRI_TRANSITIONS=69} [2024-11-09 10:39:55,335 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2024-11-09 10:39:55,335 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 69 transitions, 244 flow [2024-11-09 10:39:55,336 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) [2024-11-09 10:39:55,336 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:55,336 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:55,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:39:55,336 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:39:55,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:55,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1440747391, now seen corresponding path program 1 times [2024-11-09 10:39:55,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:55,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837965427] [2024-11-09 10:39:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:55,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:55,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:55,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837965427] [2024-11-09 10:39:55,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837965427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:39:55,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922751925] [2024-11-09 10:39:55,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:55,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:55,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:39:55,892 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) [2024-11-09 10:39:55,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:39:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:56,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-09 10:39:56,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:39:56,245 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:39:56,246 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 [2024-11-09 10:39:56,273 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:39:56,274 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 [2024-11-09 10:39:56,364 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:39:56,364 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 [2024-11-09 10:39:56,373 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 [2024-11-09 10:39:56,383 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 [2024-11-09 10:39:56,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:39:56,557 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 [2024-11-09 10:39:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:56,595 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:39:56,828 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:39:56,829 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 [2024-11-09 10:39:56,916 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:39:56,917 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 [2024-11-09 10:39:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:57,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922751925] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:39:57,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:39:57,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 21 [2024-11-09 10:39:57,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911323440] [2024-11-09 10:39:57,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:39:57,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 10:39:57,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:57,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 10:39:57,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2024-11-09 10:39:59,612 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2024-11-09 10:39:59,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 69 transitions, 244 flow. Second operand has 23 states, 23 states have (on average 35.69565217391305) internal successors, (821), 23 states have internal predecessors, (821), 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) [2024-11-09 10:39:59,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:59,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2024-11-09 10:39:59,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:40:00,030 INFO L124 PetriNetUnfolderBase]: 74/318 cut-off events. [2024-11-09 10:40:00,030 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2024-11-09 10:40:00,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 318 events. 74/318 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1298 event pairs, 72 based on Foata normal form. 9/279 useless extension candidates. Maximal degree in co-relation 571. Up to 179 conditions per place. [2024-11-09 10:40:00,032 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 53 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2024-11-09 10:40:00,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 87 transitions, 464 flow [2024-11-09 10:40:00,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 10:40:00,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-09 10:40:00,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 437 transitions. [2024-11-09 10:40:00,035 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5442092154420921 [2024-11-09 10:40:00,035 INFO L175 Difference]: Start difference. First operand has 84 places, 69 transitions, 244 flow. Second operand 11 states and 437 transitions. [2024-11-09 10:40:00,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 87 transitions, 464 flow [2024-11-09 10:40:00,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 87 transitions, 410 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:40:00,037 INFO L231 Difference]: Finished difference. Result has 93 places, 71 transitions, 277 flow [2024-11-09 10:40:00,038 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=277, PETRI_PLACES=93, PETRI_TRANSITIONS=71} [2024-11-09 10:40:00,038 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 19 predicate places. [2024-11-09 10:40:00,038 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 71 transitions, 277 flow [2024-11-09 10:40:00,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 35.69565217391305) internal successors, (821), 23 states have internal predecessors, (821), 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) [2024-11-09 10:40:00,039 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:40:00,039 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2024-11-09 10:40:00,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:40:00,243 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 [2024-11-09 10:40:00,244 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:40:00,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:40:00,244 INFO L85 PathProgramCache]: Analyzing trace with hash 621023947, now seen corresponding path program 2 times [2024-11-09 10:40:00,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:40:00,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946968571] [2024-11-09 10:40:00,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:40:00,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:40:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:40:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:40:02,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:40:02,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946968571] [2024-11-09 10:40:02,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946968571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:40:02,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365482753] [2024-11-09 10:40:02,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:40:02,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:40:02,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:40:02,502 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) [2024-11-09 10:40:02,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:40:02,791 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:40:02,792 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:40:02,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-11-09 10:40:02,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:40:02,949 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:40:02,950 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 [2024-11-09 10:40:02,970 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:40:02,970 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 [2024-11-09 10:40:03,066 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:40:03,066 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 [2024-11-09 10:40:03,080 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:40:03,081 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 [2024-11-09 10:40:03,091 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 [2024-11-09 10:40:03,309 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:40:03,309 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 [2024-11-09 10:40:03,322 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:40:03,323 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 [2024-11-09 10:40:03,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-09 10:40:03,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:40:03,459 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 [2024-11-09 10:40:03,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:40:03,612 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 [2024-11-09 10:40:03,694 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:40:03,694 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 [2024-11-09 10:40:03,710 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:40:03,710 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 [2024-11-09 10:40:03,881 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:40:03,882 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 [2024-11-09 10:40:03,896 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:40:03,896 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 [2024-11-09 10:40:04,002 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:40:04,002 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 [2024-11-09 10:40:04,019 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:40:04,019 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 [2024-11-09 10:40:04,025 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 [2024-11-09 10:40:04,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:40:04,213 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 [2024-11-09 10:40:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:40:04,255 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:40:04,471 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:40:04,471 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 [2024-11-09 10:40:04,531 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:40:04,531 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 [2024-11-09 10:40:04,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:40:04,714 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 [2024-11-09 10:40:04,778 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:40:04,779 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 [2024-11-09 10:40:05,003 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:40:05,003 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 [2024-11-09 10:40:05,071 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:40:05,071 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 [2024-11-09 10:40:05,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:40:05,264 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 [2024-11-09 10:40:05,361 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:40:05,361 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 [2024-11-09 10:40:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:40:05,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365482753] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:40:05,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:40:05,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 11] total 49 [2024-11-09 10:40:05,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537107297] [2024-11-09 10:40:05,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:40:05,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-09 10:40:05,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:40:05,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-09 10:40:05,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=2194, Unknown=0, NotChecked=0, Total=2550 [2024-11-09 10:40:13,899 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2024-11-09 10:40:13,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 71 transitions, 277 flow. Second operand has 51 states, 51 states have (on average 36.0) internal successors, (1836), 51 states have internal predecessors, (1836), 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) [2024-11-09 10:40:13,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:40:13,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2024-11-09 10:40:13,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:40:15,279 INFO L124 PetriNetUnfolderBase]: 74/378 cut-off events. [2024-11-09 10:40:15,279 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2024-11-09 10:40:15,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 782 conditions, 378 events. 74/378 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1298 event pairs, 72 based on Foata normal form. 12/342 useless extension candidates. Maximal degree in co-relation 724. Up to 179 conditions per place. [2024-11-09 10:40:15,281 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 77 selfloop transitions, 29 changer transitions 0/129 dead transitions. [2024-11-09 10:40:15,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 129 transitions, 737 flow [2024-11-09 10:40:15,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 10:40:15,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-09 10:40:15,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1026 transitions. [2024-11-09 10:40:15,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5205479452054794 [2024-11-09 10:40:15,286 INFO L175 Difference]: Start difference. First operand has 93 places, 71 transitions, 277 flow. Second operand 27 states and 1026 transitions. [2024-11-09 10:40:15,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 129 transitions, 737 flow [2024-11-09 10:40:15,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 129 transitions, 726 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:40:15,291 INFO L231 Difference]: Finished difference. Result has 131 places, 89 transitions, 509 flow [2024-11-09 10:40:15,291 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=509, PETRI_PLACES=131, PETRI_TRANSITIONS=89} [2024-11-09 10:40:15,294 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 57 predicate places. [2024-11-09 10:40:15,294 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 89 transitions, 509 flow [2024-11-09 10:40:15,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 36.0) internal successors, (1836), 51 states have internal predecessors, (1836), 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) [2024-11-09 10:40:15,295 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:40:15,296 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1] [2024-11-09 10:40:15,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 10:40:15,496 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 [2024-11-09 10:40:15,497 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-09 10:40:15,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:40:15,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1627397855, now seen corresponding path program 3 times [2024-11-09 10:40:15,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:40:15,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095913799] [2024-11-09 10:40:15,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:40:15,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:40:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:40:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 399 proven. 91 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:40:16,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:40:16,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095913799] [2024-11-09 10:40:16,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095913799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:40:16,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886325072] [2024-11-09 10:40:16,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:40:16,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:40:16,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:40:16,391 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) [2024-11-09 10:40:16,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process