./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_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-dev-4a390ef-m [2024-10-24 19:08:19,535 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:08:19,575 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:08:19,581 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:08:19,581 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:08:19,605 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:08:19,605 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:08:19,606 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:08:19,606 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:08:19,606 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:08:19,606 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:08:19,607 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:08:19,607 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:08:19,609 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:08:19,609 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:08:19,610 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:08:19,610 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:08:19,610 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:08:19,610 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:08:19,611 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:08:19,611 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:08:19,612 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:08:19,612 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:08:19,612 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:08:19,614 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:08:19,614 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:08:19,615 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:08:19,615 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:08:19,615 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:08:19,615 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:08:19,615 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:08:19,615 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:08:19,616 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:08:19,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:08:19,616 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:08:19,616 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:08:19,616 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:08:19,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:08:19,616 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:08:19,617 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:08:19,617 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:08:19,618 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:08:19,618 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c4f9d381010c40c0aeec814019363f065d1b11569cf33ee927950bcd4ef29f20 [2024-10-24 19:08:19,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:08:19,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:08:19,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:08:19,832 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:08:19,832 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:08:19,833 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2024-10-24 19:08:21,092 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:08:21,290 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:08:21,292 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2024-10-24 19:08:21,312 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8523020a/aebf116416d54b13b99f53997da01683/FLAGeb1519eb8 [2024-10-24 19:08:21,646 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8523020a/aebf116416d54b13b99f53997da01683 [2024-10-24 19:08:21,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:08:21,648 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:08:21,650 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:08:21,650 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:08:21,655 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:08:21,655 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:08:21" (1/1) ... [2024-10-24 19:08:21,656 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f629df8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:21, skipping insertion in model container [2024-10-24 19:08:21,656 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:08:21" (1/1) ... [2024-10-24 19:08:21,697 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:08:22,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:08:22,084 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:08:22,128 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:08:22,189 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:08:22,190 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:22 WrapperNode [2024-10-24 19:08:22,190 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:08:22,191 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:08:22,192 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:08:22,194 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:08:22,199 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:22" (1/1) ... [2024-10-24 19:08:22,212 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:22" (1/1) ... [2024-10-24 19:08:22,236 INFO L138 Inliner]: procedures = 370, calls = 28, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 130 [2024-10-24 19:08:22,237 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:08:22,237 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:08:22,237 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:08:22,238 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:08:22,245 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:22" (1/1) ... [2024-10-24 19:08:22,245 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:22" (1/1) ... [2024-10-24 19:08:22,250 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:22" (1/1) ... [2024-10-24 19:08:22,264 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [1, 5, 14]. 70 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0]. The 13 writes are split as follows [1, 2, 10]. [2024-10-24 19:08:22,264 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:22" (1/1) ... [2024-10-24 19:08:22,264 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:22" (1/1) ... [2024-10-24 19:08:22,273 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:22" (1/1) ... [2024-10-24 19:08:22,277 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:22" (1/1) ... [2024-10-24 19:08:22,278 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:22" (1/1) ... [2024-10-24 19:08:22,279 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:22" (1/1) ... [2024-10-24 19:08:22,282 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:08:22,282 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:08:22,282 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:08:22,283 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:08:22,283 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:22" (1/1) ... [2024-10-24 19:08:22,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:08:22,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:08:22,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 19:08:22,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 19:08:22,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-24 19:08:22,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-24 19:08:22,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-24 19:08:22,353 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-24 19:08:22,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 19:08:22,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 19:08:22,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 19:08:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 19:08:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 19:08:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 19:08:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-24 19:08:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 19:08:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:08:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-24 19:08:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-24 19:08:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-24 19:08:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-24 19:08:22,357 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-24 19:08:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:08:22,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:08:22,358 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:08:22,509 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:08:22,511 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:08:22,826 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:08:22,827 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:08:22,984 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:08:22,984 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 19:08:22,984 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:08:22 BoogieIcfgContainer [2024-10-24 19:08:22,984 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:08:22,986 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:08:22,986 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:08:22,990 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:08:22,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:08:21" (1/3) ... [2024-10-24 19:08:22,991 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3def78a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:08:22, skipping insertion in model container [2024-10-24 19:08:22,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:22" (2/3) ... [2024-10-24 19:08:22,992 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3def78a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:08:22, skipping insertion in model container [2024-10-24 19:08:22,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:08:22" (3/3) ... [2024-10-24 19:08:22,993 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_11-arraylist_nr.i [2024-10-24 19:08:23,004 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:08:23,004 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2024-10-24 19:08:23,004 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:08:23,072 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 19:08:23,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 150 flow [2024-10-24 19:08:23,132 INFO L124 PetriNetUnfolderBase]: 2/72 cut-off events. [2024-10-24 19:08:23,132 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:08:23,134 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. [2024-10-24 19:08:23,134 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 73 transitions, 150 flow [2024-10-24 19:08:23,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 72 transitions, 147 flow [2024-10-24 19:08:23,149 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:08:23,156 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;@68fe79cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:08:23,157 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-10-24 19:08:23,160 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:08:23,161 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-24 19:08:23,161 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:08:23,161 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:23,162 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-24 19:08:23,162 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-24 19:08:23,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:23,167 INFO L85 PathProgramCache]: Analyzing trace with hash 12731293, now seen corresponding path program 1 times [2024-10-24 19:08:23,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:23,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570970940] [2024-10-24 19:08:23,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:23,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:23,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:23,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570970940] [2024-10-24 19:08:23,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570970940] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:23,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:23,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:08:23,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270327541] [2024-10-24 19:08:23,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:23,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:08:23,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:23,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:08:23,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:08:23,398 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2024-10-24 19:08:23,400 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) [2024-10-24 19:08:23,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:23,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2024-10-24 19:08:23,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:23,515 INFO L124 PetriNetUnfolderBase]: 65/268 cut-off events. [2024-10-24 19:08:23,515 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:08:23,516 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. [2024-10-24 19:08:23,520 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 27 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2024-10-24 19:08:23,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 207 flow [2024-10-24 19:08:23,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:08:23,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:08:23,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2024-10-24 19:08:23,531 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7534246575342466 [2024-10-24 19:08:23,532 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 147 flow. Second operand 3 states and 165 transitions. [2024-10-24 19:08:23,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 207 flow [2024-10-24 19:08:23,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:08:23,537 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 158 flow [2024-10-24 19:08:23,540 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} [2024-10-24 19:08:23,543 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2024-10-24 19:08:23,543 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 158 flow [2024-10-24 19:08:23,544 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) [2024-10-24 19:08:23,544 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:23,544 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-24 19:08:23,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 19:08:23,545 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)] === [2024-10-24 19:08:23,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:23,545 INFO L85 PathProgramCache]: Analyzing trace with hash 394622122, now seen corresponding path program 1 times [2024-10-24 19:08:23,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:23,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009405899] [2024-10-24 19:08:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:23,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:23,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:23,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009405899] [2024-10-24 19:08:23,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009405899] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:08:23,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655354699] [2024-10-24 19:08:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:23,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:08:23,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:08:23,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:08:23,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 19:08:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:23,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:08:23,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:08:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:23,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:08:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:23,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655354699] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:08:23,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:08:23,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-24 19:08:23,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279539166] [2024-10-24 19:08:23,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:08:23,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 19:08:23,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:23,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 19:08:23,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:08:23,760 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2024-10-24 19:08:23,761 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) [2024-10-24 19:08:23,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:23,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2024-10-24 19:08:23,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:23,903 INFO L124 PetriNetUnfolderBase]: 65/271 cut-off events. [2024-10-24 19:08:23,904 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:08:23,906 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. [2024-10-24 19:08:23,907 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 27 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2024-10-24 19:08:23,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 76 transitions, 234 flow [2024-10-24 19:08:23,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:08:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:08:23,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 305 transitions. [2024-10-24 19:08:23,911 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6963470319634704 [2024-10-24 19:08:23,911 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 158 flow. Second operand 6 states and 305 transitions. [2024-10-24 19:08:23,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 76 transitions, 234 flow [2024-10-24 19:08:23,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 76 transitions, 230 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 19:08:23,912 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 190 flow [2024-10-24 19:08:23,913 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} [2024-10-24 19:08:23,913 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 9 predicate places. [2024-10-24 19:08:23,913 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 190 flow [2024-10-24 19:08:23,914 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) [2024-10-24 19:08:23,914 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:23,914 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-24 19:08:23,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 19:08:24,114 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 [2024-10-24 19:08:24,115 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)] === [2024-10-24 19:08:24,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:24,115 INFO L85 PathProgramCache]: Analyzing trace with hash 814522077, now seen corresponding path program 2 times [2024-10-24 19:08:24,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:24,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679649802] [2024-10-24 19:08:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:24,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-24 19:08:24,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:24,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679649802] [2024-10-24 19:08:24,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679649802] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:24,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:24,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:08:24,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681085189] [2024-10-24 19:08:24,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:24,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:08:24,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:24,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:08:24,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:08:24,243 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 73 [2024-10-24 19:08:24,244 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) [2024-10-24 19:08:24,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:24,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 73 [2024-10-24 19:08:24,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:24,319 INFO L124 PetriNetUnfolderBase]: 65/267 cut-off events. [2024-10-24 19:08:24,320 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 19:08:24,321 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. [2024-10-24 19:08:24,322 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 30 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2024-10-24 19:08:24,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 250 flow [2024-10-24 19:08:24,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:08:24,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:08:24,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2024-10-24 19:08:24,324 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6894977168949772 [2024-10-24 19:08:24,324 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 190 flow. Second operand 3 states and 151 transitions. [2024-10-24 19:08:24,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 250 flow [2024-10-24 19:08:24,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 72 transitions, 236 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-24 19:08:24,328 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 176 flow [2024-10-24 19:08:24,328 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} [2024-10-24 19:08:24,328 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2024-10-24 19:08:24,328 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 176 flow [2024-10-24 19:08:24,329 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) [2024-10-24 19:08:24,329 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:24,329 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-24 19:08:24,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 19:08:24,329 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)] === [2024-10-24 19:08:24,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:24,330 INFO L85 PathProgramCache]: Analyzing trace with hash 814522078, now seen corresponding path program 1 times [2024-10-24 19:08:24,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:24,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492211150] [2024-10-24 19:08:24,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:24,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:24,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:24,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492211150] [2024-10-24 19:08:24,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492211150] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:08:24,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394394266] [2024-10-24 19:08:24,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:24,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:08:24,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:08:24,410 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:08:24,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 19:08:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:24,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 19:08:24,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:08:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:24,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:08:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:24,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394394266] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:08:24,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:08:24,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-24 19:08:24,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153016045] [2024-10-24 19:08:24,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:08:24,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 19:08:24,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:24,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 19:08:24,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-24 19:08:24,532 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 73 [2024-10-24 19:08:24,532 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) [2024-10-24 19:08:24,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:24,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 73 [2024-10-24 19:08:24,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:24,641 INFO L124 PetriNetUnfolderBase]: 65/273 cut-off events. [2024-10-24 19:08:24,642 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-10-24 19:08:24,643 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. [2024-10-24 19:08:24,644 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 27 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-10-24 19:08:24,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 78 transitions, 288 flow [2024-10-24 19:08:24,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:08:24,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:08:24,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 584 transitions. [2024-10-24 19:08:24,648 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-10-24 19:08:24,648 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 176 flow. Second operand 12 states and 584 transitions. [2024-10-24 19:08:24,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 78 transitions, 288 flow [2024-10-24 19:08:24,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 78 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:08:24,649 INFO L231 Difference]: Finished difference. Result has 95 places, 78 transitions, 252 flow [2024-10-24 19:08:24,650 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} [2024-10-24 19:08:24,652 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2024-10-24 19:08:24,652 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 78 transitions, 252 flow [2024-10-24 19:08:24,652 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) [2024-10-24 19:08:24,652 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:24,652 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-10-24 19:08:24,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 19:08:24,853 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 [2024-10-24 19:08:24,853 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)] === [2024-10-24 19:08:24,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:24,854 INFO L85 PathProgramCache]: Analyzing trace with hash 11656126, now seen corresponding path program 2 times [2024-10-24 19:08:24,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:24,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240342671] [2024-10-24 19:08:24,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:24,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:08:24,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:24,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240342671] [2024-10-24 19:08:24,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240342671] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:24,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:24,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:08:24,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062451182] [2024-10-24 19:08:24,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:24,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:08:24,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:24,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:08:24,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:08:25,013 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 73 [2024-10-24 19:08:25,014 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) [2024-10-24 19:08:25,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:25,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 73 [2024-10-24 19:08:25,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:25,076 INFO L124 PetriNetUnfolderBase]: 65/269 cut-off events. [2024-10-24 19:08:25,076 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-10-24 19:08:25,077 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. [2024-10-24 19:08:25,078 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 34 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2024-10-24 19:08:25,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 74 transitions, 320 flow [2024-10-24 19:08:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:08:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:08:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2024-10-24 19:08:25,081 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7077625570776256 [2024-10-24 19:08:25,081 INFO L175 Difference]: Start difference. First operand has 95 places, 78 transitions, 252 flow. Second operand 3 states and 155 transitions. [2024-10-24 19:08:25,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 74 transitions, 320 flow [2024-10-24 19:08:25,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 74 transitions, 272 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-10-24 19:08:25,084 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 204 flow [2024-10-24 19:08:25,084 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} [2024-10-24 19:08:25,085 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2024-10-24 19:08:25,085 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 204 flow [2024-10-24 19:08:25,085 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) [2024-10-24 19:08:25,085 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:25,086 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2024-10-24 19:08:25,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 19:08:25,086 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)] === [2024-10-24 19:08:25,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:25,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1683354093, now seen corresponding path program 1 times [2024-10-24 19:08:25,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:25,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769976813] [2024-10-24 19:08:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:25,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:08:25,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:25,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769976813] [2024-10-24 19:08:25,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769976813] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:25,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:25,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:08:25,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638323481] [2024-10-24 19:08:25,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:25,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 19:08:25,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:25,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 19:08:25,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-24 19:08:25,476 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 73 [2024-10-24 19:08:25,476 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) [2024-10-24 19:08:25,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:25,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 73 [2024-10-24 19:08:25,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:25,601 INFO L124 PetriNetUnfolderBase]: 65/277 cut-off events. [2024-10-24 19:08:25,603 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-10-24 19:08:25,603 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. [2024-10-24 19:08:25,604 INFO L140 encePairwiseOnDemand]: 59/73 looper letters, 40 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2024-10-24 19:08:25,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 77 transitions, 312 flow [2024-10-24 19:08:25,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:08:25,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:08:25,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 221 transitions. [2024-10-24 19:08:25,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6054794520547945 [2024-10-24 19:08:25,605 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 204 flow. Second operand 5 states and 221 transitions. [2024-10-24 19:08:25,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 77 transitions, 312 flow [2024-10-24 19:08:25,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 77 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:08:25,609 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 238 flow [2024-10-24 19:08:25,609 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} [2024-10-24 19:08:25,610 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2024-10-24 19:08:25,610 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 238 flow [2024-10-24 19:08:25,610 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) [2024-10-24 19:08:25,610 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:25,610 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:08:25,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 19:08:25,610 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)] === [2024-10-24 19:08:25,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:25,611 INFO L85 PathProgramCache]: Analyzing trace with hash 2109664476, now seen corresponding path program 1 times [2024-10-24 19:08:25,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:25,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186916420] [2024-10-24 19:08:25,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:25,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:08:25,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:25,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186916420] [2024-10-24 19:08:25,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186916420] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:25,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:25,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 19:08:25,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950462625] [2024-10-24 19:08:25,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:25,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 19:08:25,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:25,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 19:08:25,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:08:26,085 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 73 [2024-10-24 19:08:26,085 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) [2024-10-24 19:08:26,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:26,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 73 [2024-10-24 19:08:26,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:26,225 INFO L124 PetriNetUnfolderBase]: 65/273 cut-off events. [2024-10-24 19:08:26,226 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-10-24 19:08:26,226 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. [2024-10-24 19:08:26,227 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 35 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-10-24 19:08:26,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 73 transitions, 326 flow [2024-10-24 19:08:26,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 19:08:26,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 19:08:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 285 transitions. [2024-10-24 19:08:26,228 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5577299412915852 [2024-10-24 19:08:26,228 INFO L175 Difference]: Start difference. First operand has 88 places, 75 transitions, 238 flow. Second operand 7 states and 285 transitions. [2024-10-24 19:08:26,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 73 transitions, 326 flow [2024-10-24 19:08:26,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 73 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:08:26,230 INFO L231 Difference]: Finished difference. Result has 90 places, 73 transitions, 252 flow [2024-10-24 19:08:26,231 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} [2024-10-24 19:08:26,231 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2024-10-24 19:08:26,231 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 73 transitions, 252 flow [2024-10-24 19:08:26,232 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) [2024-10-24 19:08:26,232 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:26,232 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:08:26,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 19:08:26,232 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)] === [2024-10-24 19:08:26,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:26,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2109664477, now seen corresponding path program 1 times [2024-10-24 19:08:26,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:26,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446267009] [2024-10-24 19:08:26,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:26,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:08:26,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:26,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446267009] [2024-10-24 19:08:26,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446267009] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:26,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:26,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 19:08:26,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962636854] [2024-10-24 19:08:26,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:26,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 19:08:26,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:26,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 19:08:26,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:08:26,883 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 73 [2024-10-24 19:08:26,884 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) [2024-10-24 19:08:26,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:26,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 73 [2024-10-24 19:08:26,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:27,021 INFO L124 PetriNetUnfolderBase]: 65/269 cut-off events. [2024-10-24 19:08:27,021 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-10-24 19:08:27,022 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. [2024-10-24 19:08:27,023 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 34 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2024-10-24 19:08:27,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 71 transitions, 338 flow [2024-10-24 19:08:27,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 19:08:27,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 19:08:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 263 transitions. [2024-10-24 19:08:27,024 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5146771037181996 [2024-10-24 19:08:27,025 INFO L175 Difference]: Start difference. First operand has 90 places, 73 transitions, 252 flow. Second operand 7 states and 263 transitions. [2024-10-24 19:08:27,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 71 transitions, 338 flow [2024-10-24 19:08:27,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 71 transitions, 316 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-24 19:08:27,027 INFO L231 Difference]: Finished difference. Result has 88 places, 71 transitions, 248 flow [2024-10-24 19:08:27,028 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} [2024-10-24 19:08:27,029 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2024-10-24 19:08:27,030 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 71 transitions, 248 flow [2024-10-24 19:08:27,030 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) [2024-10-24 19:08:27,031 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:27,031 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:08:27,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-24 19:08:27,031 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)] === [2024-10-24 19:08:27,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:27,031 INFO L85 PathProgramCache]: Analyzing trace with hash 163012799, now seen corresponding path program 1 times [2024-10-24 19:08:27,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:27,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646547431] [2024-10-24 19:08:27,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:27,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:08:27,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:27,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646547431] [2024-10-24 19:08:27,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646547431] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:27,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:27,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:08:27,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912788756] [2024-10-24 19:08:27,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:27,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:08:27,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:27,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:08:27,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:08:27,215 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-10-24 19:08:27,215 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) [2024-10-24 19:08:27,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:27,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-10-24 19:08:27,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:27,301 INFO L124 PetriNetUnfolderBase]: 65/267 cut-off events. [2024-10-24 19:08:27,302 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-10-24 19:08:27,302 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. [2024-10-24 19:08:27,303 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 34 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2024-10-24 19:08:27,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 70 transitions, 336 flow [2024-10-24 19:08:27,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:08:27,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:08:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 221 transitions. [2024-10-24 19:08:27,304 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6054794520547945 [2024-10-24 19:08:27,304 INFO L175 Difference]: Start difference. First operand has 88 places, 71 transitions, 248 flow. Second operand 5 states and 221 transitions. [2024-10-24 19:08:27,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 70 transitions, 336 flow [2024-10-24 19:08:27,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 70 transitions, 314 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-24 19:08:27,306 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 246 flow [2024-10-24 19:08:27,306 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} [2024-10-24 19:08:27,307 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 11 predicate places. [2024-10-24 19:08:27,307 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 246 flow [2024-10-24 19:08:27,307 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) [2024-10-24 19:08:27,307 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:27,307 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:08:27,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-24 19:08:27,307 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)] === [2024-10-24 19:08:27,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:27,308 INFO L85 PathProgramCache]: Analyzing trace with hash 163012800, now seen corresponding path program 1 times [2024-10-24 19:08:27,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:27,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898523187] [2024-10-24 19:08:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:27,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:08:27,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:27,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898523187] [2024-10-24 19:08:27,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898523187] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:27,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:27,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:08:27,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042127587] [2024-10-24 19:08:27,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:27,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:08:27,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:27,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:08:27,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:08:27,529 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 73 [2024-10-24 19:08:27,530 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) [2024-10-24 19:08:27,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:27,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 73 [2024-10-24 19:08:27,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:27,625 INFO L124 PetriNetUnfolderBase]: 65/265 cut-off events. [2024-10-24 19:08:27,625 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-10-24 19:08:27,626 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. [2024-10-24 19:08:27,627 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 32 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-10-24 19:08:27,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 69 transitions, 330 flow [2024-10-24 19:08:27,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:08:27,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:08:27,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 229 transitions. [2024-10-24 19:08:27,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6273972602739726 [2024-10-24 19:08:27,628 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 246 flow. Second operand 5 states and 229 transitions. [2024-10-24 19:08:27,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 69 transitions, 330 flow [2024-10-24 19:08:27,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 69 transitions, 308 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:08:27,630 INFO L231 Difference]: Finished difference. Result has 84 places, 69 transitions, 244 flow [2024-10-24 19:08:27,630 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} [2024-10-24 19:08:27,631 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2024-10-24 19:08:27,631 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 69 transitions, 244 flow [2024-10-24 19:08:27,631 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) [2024-10-24 19:08:27,631 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:27,632 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:08:27,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-24 19:08:27,632 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)] === [2024-10-24 19:08:27,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:27,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1436683263, now seen corresponding path program 1 times [2024-10-24 19:08:27,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:27,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740108271] [2024-10-24 19:08:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:27,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:08:27,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:27,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740108271] [2024-10-24 19:08:27,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740108271] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:08:27,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011729763] [2024-10-24 19:08:27,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:27,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:08:27,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:08:27,977 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:08:27,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 19:08:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:28,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-24 19:08:28,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:08:28,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:28,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:28,332 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 19:08:28,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-24 19:08:28,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:28,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:28,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:08:28,473 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:08:28,651 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 19:08:28,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-10-24 19:08:28,711 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 19:08:28,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-24 19:08:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:08:28,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011729763] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:08:28,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:08:28,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 19 [2024-10-24 19:08:28,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690150156] [2024-10-24 19:08:28,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:08:28,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 19:08:28,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:28,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 19:08:28,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-10-24 19:08:30,583 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2024-10-24 19:08:30,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 69 transitions, 244 flow. Second operand has 21 states, 21 states have (on average 35.857142857142854) internal successors, (753), 21 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:30,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:30,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2024-10-24 19:08:30,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:30,925 INFO L124 PetriNetUnfolderBase]: 74/318 cut-off events. [2024-10-24 19:08:30,925 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2024-10-24 19:08:30,926 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. [2024-10-24 19:08:30,927 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 53 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2024-10-24 19:08:30,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 464 flow [2024-10-24 19:08:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 19:08:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 19:08:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 369 transitions. [2024-10-24 19:08:30,929 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5616438356164384 [2024-10-24 19:08:30,929 INFO L175 Difference]: Start difference. First operand has 84 places, 69 transitions, 244 flow. Second operand 9 states and 369 transitions. [2024-10-24 19:08:30,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 464 flow [2024-10-24 19:08:30,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 87 transitions, 410 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:08:30,932 INFO L231 Difference]: Finished difference. Result has 91 places, 71 transitions, 277 flow [2024-10-24 19:08:30,932 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=9, PETRI_FLOW=277, PETRI_PLACES=91, PETRI_TRANSITIONS=71} [2024-10-24 19:08:30,932 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 17 predicate places. [2024-10-24 19:08:30,933 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 71 transitions, 277 flow [2024-10-24 19:08:30,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 35.857142857142854) internal successors, (753), 21 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:30,933 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:30,933 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2024-10-24 19:08:30,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 19:08:31,134 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 [2024-10-24 19:08:31,134 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-24 19:08:31,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:31,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1244087093, now seen corresponding path program 2 times [2024-10-24 19:08:31,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:31,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599141044] [2024-10-24 19:08:31,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:31,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:08:32,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:32,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599141044] [2024-10-24 19:08:32,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599141044] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:08:32,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236001967] [2024-10-24 19:08:32,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:08:32,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:08:32,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:08:32,509 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:08:32,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 19:08:32,711 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:08:32,711 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:08:32,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-10-24 19:08:32,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:08:32,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:32,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:32,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:32,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:32,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:32,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:32,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:32,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:33,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:33,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:33,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:33,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:33,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:33,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:33,190 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 19:08:33,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-24 19:08:33,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:33,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:33,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:08:33,341 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:08:33,544 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 19:08:33,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-10-24 19:08:33,631 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 19:08:33,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-24 19:08:33,781 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 19:08:33,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-10-24 19:08:33,848 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 19:08:33,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-24 19:08:33,997 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 19:08:33,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-10-24 19:08:34,061 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 19:08:34,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-24 19:08:34,228 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 19:08:34,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-10-24 19:08:34,285 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 19:08:34,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-24 19:08:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:08:34,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236001967] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:08:34,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:08:34,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 38 [2024-10-24 19:08:34,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768317230] [2024-10-24 19:08:34,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:08:34,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-24 19:08:34,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:34,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-24 19:08:34,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2024-10-24 19:08:39,574 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2024-10-24 19:08:39,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 71 transitions, 277 flow. Second operand has 40 states, 40 states have (on average 36.55) internal successors, (1462), 40 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:39,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:39,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2024-10-24 19:08:39,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:40,416 INFO L124 PetriNetUnfolderBase]: 74/378 cut-off events. [2024-10-24 19:08:40,416 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2024-10-24 19:08:40,417 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. [2024-10-24 19:08:40,418 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 85 selfloop transitions, 21 changer transitions 0/129 dead transitions. [2024-10-24 19:08:40,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 129 transitions, 737 flow [2024-10-24 19:08:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 19:08:40,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-24 19:08:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 652 transitions. [2024-10-24 19:08:40,419 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5582191780821918 [2024-10-24 19:08:40,419 INFO L175 Difference]: Start difference. First operand has 91 places, 71 transitions, 277 flow. Second operand 16 states and 652 transitions. [2024-10-24 19:08:40,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 129 transitions, 737 flow [2024-10-24 19:08:40,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 129 transitions, 726 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:08:40,422 INFO L231 Difference]: Finished difference. Result has 113 places, 86 transitions, 477 flow [2024-10-24 19:08:40,422 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=477, PETRI_PLACES=113, PETRI_TRANSITIONS=86} [2024-10-24 19:08:40,423 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 39 predicate places. [2024-10-24 19:08:40,423 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 86 transitions, 477 flow [2024-10-24 19:08:40,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 36.55) internal successors, (1462), 40 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:40,423 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:40,424 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1] [2024-10-24 19:08:40,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 19:08:40,624 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 [2024-10-24 19:08:40,625 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)] === [2024-10-24 19:08:40,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:40,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1520629215, now seen corresponding path program 3 times [2024-10-24 19:08:40,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:40,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54163623] [2024-10-24 19:08:40,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:40,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 399 proven. 91 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:08:41,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:41,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54163623] [2024-10-24 19:08:41,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54163623] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:08:41,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556475045] [2024-10-24 19:08:41,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 19:08:41,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:08:41,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:08:41,217 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:08:41,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process