./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bbb47797d2c6a4d5e961c4dfd7a8e6f4ff79c632e04c289068b1b9e8cca736fa --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:36:16,251 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:36:16,317 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:36:16,322 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:36:16,323 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:36:16,347 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:36:16,348 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:36:16,349 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:36:16,350 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:36:16,350 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:36:16,351 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:36:16,352 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:36:16,353 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:36:16,353 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:36:16,354 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:36:16,354 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:36:16,355 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:36:16,356 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:36:16,356 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:36:16,357 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:36:16,357 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:36:16,358 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:36:16,359 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:36:16,359 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:36:16,363 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:36:16,364 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:36:16,364 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:36:16,365 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:36:16,365 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:36:16,366 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:36:16,366 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:36:16,367 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:36:16,367 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:36:16,367 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:36:16,368 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:36:16,368 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:36:16,369 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:36:16,369 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:36:16,369 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bbb47797d2c6a4d5e961c4dfd7a8e6f4ff79c632e04c289068b1b9e8cca736fa [2023-11-19 07:36:16,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:36:16,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:36:16,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:36:16,700 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:36:16,701 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:36:16,702 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i [2023-11-19 07:36:20,005 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:36:20,393 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:36:20,397 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/sv-benchmarks/c/goblint-regression/09-regions_09-arraylist.i [2023-11-19 07:36:20,423 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/data/f5df18707/25b8886a35da4730b05610fbd2cd9bd5/FLAG56b45df17 [2023-11-19 07:36:20,442 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/data/f5df18707/25b8886a35da4730b05610fbd2cd9bd5 [2023-11-19 07:36:20,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:36:20,450 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:36:20,455 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:36:20,455 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:36:20,461 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:36:20,462 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:36:20" (1/1) ... [2023-11-19 07:36:20,465 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@565e718b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:20, skipping insertion in model container [2023-11-19 07:36:20,465 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:36:20" (1/1) ... [2023-11-19 07:36:20,538 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:36:21,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:36:21,311 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:36:21,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:36:21,490 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:36:21,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:21 WrapperNode [2023-11-19 07:36:21,491 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:36:21,492 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:36:21,492 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:36:21,493 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:36:21,500 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:21" (1/1) ... [2023-11-19 07:36:21,554 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:21" (1/1) ... [2023-11-19 07:36:21,601 INFO L138 Inliner]: procedures = 371, calls = 35, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 121 [2023-11-19 07:36:21,601 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:36:21,602 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:36:21,602 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:36:21,602 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:36:21,611 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:21" (1/1) ... [2023-11-19 07:36:21,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:21" (1/1) ... [2023-11-19 07:36:21,630 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:21" (1/1) ... [2023-11-19 07:36:21,637 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:21" (1/1) ... [2023-11-19 07:36:21,647 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:21" (1/1) ... [2023-11-19 07:36:21,660 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:21" (1/1) ... [2023-11-19 07:36:21,663 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:21" (1/1) ... [2023-11-19 07:36:21,675 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:21" (1/1) ... [2023-11-19 07:36:21,679 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:36:21,680 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:36:21,680 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:36:21,680 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:36:21,681 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:21" (1/1) ... [2023-11-19 07:36:21,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:36:21,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:21,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:36:21,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:36:21,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:36:21,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:36:21,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:36:21,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:36:21,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:36:21,771 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:36:21,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:36:21,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:36:21,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 07:36:21,772 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 07:36:21,772 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 07:36:21,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:36:21,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:36:21,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:36:21,775 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:36:21,998 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:36:22,000 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:36:22,465 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:36:22,477 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:36:22,479 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:36:22,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:36:22 BoogieIcfgContainer [2023-11-19 07:36:22,491 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:36:22,495 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:36:22,495 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:36:22,498 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:36:22,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:36:20" (1/3) ... [2023-11-19 07:36:22,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c04ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:36:22, skipping insertion in model container [2023-11-19 07:36:22,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:21" (2/3) ... [2023-11-19 07:36:22,500 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c04ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:36:22, skipping insertion in model container [2023-11-19 07:36:22,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:36:22" (3/3) ... [2023-11-19 07:36:22,501 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_09-arraylist.i [2023-11-19 07:36:22,516 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:36:22,516 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-19 07:36:22,517 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:36:22,633 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:36:22,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 189 transitions, 382 flow [2023-11-19 07:36:22,815 INFO L124 PetriNetUnfolderBase]: 4/188 cut-off events. [2023-11-19 07:36:22,815 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:36:22,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 188 events. 4/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 405 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2023-11-19 07:36:22,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 189 transitions, 382 flow [2023-11-19 07:36:22,841 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 188 places, 188 transitions, 379 flow [2023-11-19 07:36:22,845 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:36:22,862 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 188 transitions, 379 flow [2023-11-19 07:36:22,865 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 188 transitions, 379 flow [2023-11-19 07:36:22,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 188 transitions, 379 flow [2023-11-19 07:36:22,918 INFO L124 PetriNetUnfolderBase]: 4/188 cut-off events. [2023-11-19 07:36:22,918 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:36:22,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 188 events. 4/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 405 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2023-11-19 07:36:22,923 INFO L119 LiptonReduction]: Number of co-enabled transitions 3192 [2023-11-19 07:36:45,097 WARN L293 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 186 DAG size of output: 174 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-19 07:36:53,958 WARN L293 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 190 DAG size of output: 180 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-19 07:36:56,349 INFO L134 LiptonReduction]: Checked pairs total: 12197 [2023-11-19 07:36:56,349 INFO L136 LiptonReduction]: Total number of compositions: 230 [2023-11-19 07:36:56,369 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:36:56,375 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@23b8155f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:36:56,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-19 07:36:56,379 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:36:56,379 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-19 07:36:56,380 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:36:56,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:56,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:36:56,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 07:36:56,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:56,386 INFO L85 PathProgramCache]: Analyzing trace with hash 22664, now seen corresponding path program 1 times [2023-11-19 07:36:56,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:56,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164826172] [2023-11-19 07:36:56,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:56,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:56,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:56,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164826172] [2023-11-19 07:36:56,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164826172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:56,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:56,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:36:56,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820663508] [2023-11-19 07:36:56,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:56,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:56,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:56,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:56,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:56,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 419 [2023-11-19 07:36:56,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 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) [2023-11-19 07:36:56,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:56,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 419 [2023-11-19 07:36:56,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:57,024 INFO L124 PetriNetUnfolderBase]: 209/488 cut-off events. [2023-11-19 07:36:57,025 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:36:57,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 488 events. 209/488 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2313 event pairs, 208 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 922. Up to 454 conditions per place. [2023-11-19 07:36:57,031 INFO L140 encePairwiseOnDemand]: 396/419 looper letters, 38 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-11-19 07:36:57,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 173 flow [2023-11-19 07:36:57,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:57,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 614 transitions. [2023-11-19 07:36:57,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4884645982498011 [2023-11-19 07:36:57,053 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 614 transitions. [2023-11-19 07:36:57,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 614 transitions. [2023-11-19 07:36:57,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:57,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 614 transitions. [2023-11-19 07:36:57,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 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) [2023-11-19 07:36:57,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 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) [2023-11-19 07:36:57,078 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 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) [2023-11-19 07:36:57,080 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 123 flow. Second operand 3 states and 614 transitions. [2023-11-19 07:36:57,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 173 flow [2023-11-19 07:36:57,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:57,086 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 102 flow [2023-11-19 07:36:57,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-11-19 07:36:57,093 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -16 predicate places. [2023-11-19 07:36:57,093 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 102 flow [2023-11-19 07:36:57,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 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) [2023-11-19 07:36:57,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:57,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:36:57,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:36:57,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 07:36:57,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:57,096 INFO L85 PathProgramCache]: Analyzing trace with hash 22711, now seen corresponding path program 1 times [2023-11-19 07:36:57,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:57,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492721962] [2023-11-19 07:36:57,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:57,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:57,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:57,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492721962] [2023-11-19 07:36:57,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492721962] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:57,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:57,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:36:57,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745791132] [2023-11-19 07:36:57,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:57,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:57,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:57,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:57,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:57,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 419 [2023-11-19 07:36:57,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 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) [2023-11-19 07:36:57,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:57,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 419 [2023-11-19 07:36:57,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:57,802 INFO L124 PetriNetUnfolderBase]: 196/446 cut-off events. [2023-11-19 07:36:57,803 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:36:57,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 446 events. 196/446 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2078 event pairs, 131 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 874. Up to 289 conditions per place. [2023-11-19 07:36:57,808 INFO L140 encePairwiseOnDemand]: 414/419 looper letters, 51 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-11-19 07:36:57,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 57 transitions, 236 flow [2023-11-19 07:36:57,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:57,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:57,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-11-19 07:36:57,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733492442322991 [2023-11-19 07:36:57,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-11-19 07:36:57,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-11-19 07:36:57,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:57,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-11-19 07:36:57,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 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) [2023-11-19 07:36:57,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 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) [2023-11-19 07:36:57,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 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) [2023-11-19 07:36:57,822 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 102 flow. Second operand 3 states and 595 transitions. [2023-11-19 07:36:57,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 57 transitions, 236 flow [2023-11-19 07:36:57,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:57,826 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 104 flow [2023-11-19 07:36:57,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2023-11-19 07:36:57,827 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -16 predicate places. [2023-11-19 07:36:57,827 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 104 flow [2023-11-19 07:36:57,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 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) [2023-11-19 07:36:57,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:57,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:36:57,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:36:57,829 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 07:36:57,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:57,830 INFO L85 PathProgramCache]: Analyzing trace with hash 22712, now seen corresponding path program 1 times [2023-11-19 07:36:57,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:57,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532152292] [2023-11-19 07:36:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:57,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:58,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:58,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532152292] [2023-11-19 07:36:58,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532152292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:58,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:58,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:36:58,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755174931] [2023-11-19 07:36:58,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:58,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:58,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:58,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:58,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:58,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 419 [2023-11-19 07:36:58,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 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) [2023-11-19 07:36:58,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:58,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 419 [2023-11-19 07:36:58,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:58,439 INFO L124 PetriNetUnfolderBase]: 193/442 cut-off events. [2023-11-19 07:36:58,440 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-19 07:36:58,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 911 conditions, 442 events. 193/442 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2030 event pairs, 192 based on Foata normal form. 1/279 useless extension candidates. Maximal degree in co-relation 885. Up to 420 conditions per place. [2023-11-19 07:36:58,447 INFO L140 encePairwiseOnDemand]: 416/419 looper letters, 34 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-11-19 07:36:58,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 176 flow [2023-11-19 07:36:58,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:58,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:58,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-11-19 07:36:58,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4447096260938743 [2023-11-19 07:36:58,451 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-11-19 07:36:58,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-11-19 07:36:58,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:58,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-11-19 07:36:58,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 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) [2023-11-19 07:36:58,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 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) [2023-11-19 07:36:58,460 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 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) [2023-11-19 07:36:58,460 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 104 flow. Second operand 3 states and 559 transitions. [2023-11-19 07:36:58,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 176 flow [2023-11-19 07:36:58,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 41 transitions, 170 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 07:36:58,464 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 106 flow [2023-11-19 07:36:58,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2023-11-19 07:36:58,466 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -15 predicate places. [2023-11-19 07:36:58,466 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 106 flow [2023-11-19 07:36:58,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 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) [2023-11-19 07:36:58,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:58,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:36:58,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:36:58,469 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 07:36:58,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:58,470 INFO L85 PathProgramCache]: Analyzing trace with hash 705270, now seen corresponding path program 1 times [2023-11-19 07:36:58,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:58,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74037314] [2023-11-19 07:36:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:58,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:59,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:59,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74037314] [2023-11-19 07:36:59,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74037314] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:36:59,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465319267] [2023-11-19 07:36:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:59,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:59,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:59,165 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:59,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:36:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:59,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 07:36:59,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:59,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:36:59,435 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 [2023-11-19 07:36:59,465 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-19 07:36:59,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-19 07:36:59,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:36:59,590 INFO L349 Elim1Store]: treesize reduction 42, result has 25.0 percent of original size [2023-11-19 07:36:59,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 41 [2023-11-19 07:36:59,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-19 07:36:59,636 INFO L349 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2023-11-19 07:36:59,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 1 [2023-11-19 07:36:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:36:59,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:00,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465319267] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:00,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:00,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 07:37:00,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357951130] [2023-11-19 07:37:00,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:00,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:37:00,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:00,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:37:00,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:37:03,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 07:37:04,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 07:37:05,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 419 [2023-11-19 07:37:05,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 106 flow. Second operand has 8 states, 8 states have (on average 163.125) internal successors, (1305), 8 states have internal predecessors, (1305), 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) [2023-11-19 07:37:05,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:05,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 419 [2023-11-19 07:37:05,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:07,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 07:37:09,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 07:37:11,833 INFO L124 PetriNetUnfolderBase]: 202/457 cut-off events. [2023-11-19 07:37:11,834 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:37:11,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 940 conditions, 457 events. 202/457 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2078 event pairs, 195 based on Foata normal form. 3/289 useless extension candidates. Maximal degree in co-relation 926. Up to 433 conditions per place. [2023-11-19 07:37:11,838 INFO L140 encePairwiseOnDemand]: 413/419 looper letters, 35 selfloop transitions, 11 changer transitions 0/50 dead transitions. [2023-11-19 07:37:11,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 234 flow [2023-11-19 07:37:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:37:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:37:11,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1024 transitions. [2023-11-19 07:37:11,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40731901352426414 [2023-11-19 07:37:11,844 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1024 transitions. [2023-11-19 07:37:11,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1024 transitions. [2023-11-19 07:37:11,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:11,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1024 transitions. [2023-11-19 07:37:11,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 170.66666666666666) internal successors, (1024), 6 states have internal predecessors, (1024), 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) [2023-11-19 07:37:11,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 419.0) internal successors, (2933), 7 states have internal predecessors, (2933), 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) [2023-11-19 07:37:11,857 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 419.0) internal successors, (2933), 7 states have internal predecessors, (2933), 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) [2023-11-19 07:37:11,858 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 106 flow. Second operand 6 states and 1024 transitions. [2023-11-19 07:37:11,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 234 flow [2023-11-19 07:37:11,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 50 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:37:11,861 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 186 flow [2023-11-19 07:37:11,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-11-19 07:37:11,862 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2023-11-19 07:37:11,862 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 186 flow [2023-11-19 07:37:11,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 163.125) internal successors, (1305), 8 states have internal predecessors, (1305), 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) [2023-11-19 07:37:11,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:11,864 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2023-11-19 07:37:11,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:12,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:12,077 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 07:37:12,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:12,078 INFO L85 PathProgramCache]: Analyzing trace with hash 677802760, now seen corresponding path program 1 times [2023-11-19 07:37:12,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:12,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131619198] [2023-11-19 07:37:12,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:12,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:12,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:12,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131619198] [2023-11-19 07:37:12,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131619198] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:12,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294513923] [2023-11-19 07:37:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:12,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:12,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:12,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:12,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:37:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:12,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:37:12,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:12,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:37:12,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294513923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:12,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:37:12,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-19 07:37:12,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230617951] [2023-11-19 07:37:12,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:12,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:37:12,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:12,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:37:12,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:37:12,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 419 [2023-11-19 07:37:12,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 186 flow. Second operand has 11 states, 11 states have (on average 179.0909090909091) internal successors, (1970), 11 states have internal predecessors, (1970), 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) [2023-11-19 07:37:12,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:37:12,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 419 [2023-11-19 07:37:12,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:37:13,351 INFO L124 PetriNetUnfolderBase]: 194/453 cut-off events. [2023-11-19 07:37:13,352 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-19 07:37:13,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 962 conditions, 453 events. 194/453 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2038 event pairs, 192 based on Foata normal form. 1/290 useless extension candidates. Maximal degree in co-relation 915. Up to 419 conditions per place. [2023-11-19 07:37:13,357 INFO L140 encePairwiseOnDemand]: 413/419 looper letters, 37 selfloop transitions, 10 changer transitions 0/52 dead transitions. [2023-11-19 07:37:13,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 52 transitions, 302 flow [2023-11-19 07:37:13,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:37:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:37:13,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1845 transitions. [2023-11-19 07:37:13,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403341288782816 [2023-11-19 07:37:13,366 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1845 transitions. [2023-11-19 07:37:13,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1845 transitions. [2023-11-19 07:37:13,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:37:13,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1845 transitions. [2023-11-19 07:37:13,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 184.5) internal successors, (1845), 10 states have internal predecessors, (1845), 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) [2023-11-19 07:37:13,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 419.0) internal successors, (4609), 11 states have internal predecessors, (4609), 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) [2023-11-19 07:37:13,386 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 419.0) internal successors, (4609), 11 states have internal predecessors, (4609), 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) [2023-11-19 07:37:13,386 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 186 flow. Second operand 10 states and 1845 transitions. [2023-11-19 07:37:13,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 52 transitions, 302 flow [2023-11-19 07:37:13,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 52 transitions, 270 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-11-19 07:37:13,390 INFO L231 Difference]: Finished difference. Result has 66 places, 49 transitions, 206 flow [2023-11-19 07:37:13,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=206, PETRI_PLACES=66, PETRI_TRANSITIONS=49} [2023-11-19 07:37:13,391 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-11-19 07:37:13,392 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 49 transitions, 206 flow [2023-11-19 07:37:13,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 179.0909090909091) internal successors, (1970), 11 states have internal predecessors, (1970), 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) [2023-11-19 07:37:13,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:37:13,394 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-19 07:37:13,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:13,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f202f1c7-a989-48e5-a084-436c49b76acb/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:13,616 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-19 07:37:13,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:13,617 INFO L85 PathProgramCache]: Analyzing trace with hash -462948296, now seen corresponding path program 2 times [2023-11-19 07:37:13,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:13,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760004547] [2023-11-19 07:37:13,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:13,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat