./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/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_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/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_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/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 af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:55:10,420 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:55:10,512 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:55:10,523 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:55:10,524 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:55:10,571 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:55:10,573 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:55:10,573 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:55:10,575 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:55:10,582 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:55:10,583 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:55:10,584 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:55:10,585 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:55:10,587 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:55:10,587 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:55:10,589 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:55:10,589 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:55:10,590 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:55:10,590 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:55:10,591 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:55:10,591 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:55:10,592 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:55:10,593 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:55:10,593 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:55:10,594 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:55:10,594 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:55:10,595 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:55:10,595 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:55:10,596 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:55:10,596 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:10,597 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:55:10,597 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:55:10,598 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:55:10,598 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:55:10,598 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:55:10,599 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:55:10,599 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:55:10,600 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:55:10,600 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_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 [2023-11-19 07:55:10,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:55:10,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:55:10,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:55:10,932 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:55:10,936 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:55:10,937 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-11-19 07:55:14,121 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:55:14,498 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:55:14,499 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-11-19 07:55:14,521 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/data/9828ac659/0f1b58096076465b9c9bfda0cc19b23a/FLAG505293b1b [2023-11-19 07:55:14,539 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/data/9828ac659/0f1b58096076465b9c9bfda0cc19b23a [2023-11-19 07:55:14,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:55:14,551 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:55:14,553 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:14,553 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:55:14,558 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:55:14,564 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:14" (1/1) ... [2023-11-19 07:55:14,567 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b452b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:14, skipping insertion in model container [2023-11-19 07:55:14,568 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:14" (1/1) ... [2023-11-19 07:55:14,624 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:55:15,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:15,124 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:55:15,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:15,208 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:55:15,208 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15 WrapperNode [2023-11-19 07:55:15,208 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:15,210 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:15,210 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:55:15,210 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:55:15,217 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,231 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,256 INFO L138 Inliner]: procedures = 171, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2023-11-19 07:55:15,257 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:15,258 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:55:15,258 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:55:15,258 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:55:15,267 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,268 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,271 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,272 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,281 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,286 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,289 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,290 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,294 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:55:15,295 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:55:15,295 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:55:15,295 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:55:15,296 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:15,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:15,329 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:15,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:55:15,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:55:15,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:55:15,369 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:55:15,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:55:15,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:55:15,370 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 07:55:15,370 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 07:55:15,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:55:15,370 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-11-19 07:55:15,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:55:15,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:55:15,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:55:15,372 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 07:55:15,524 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:55:15,527 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:55:15,748 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:55:15,759 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:55:15,759 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-19 07:55:15,764 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:15 BoogieIcfgContainer [2023-11-19 07:55:15,764 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:55:15,766 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:55:15,767 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:55:15,769 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:55:15,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:55:14" (1/3) ... [2023-11-19 07:55:15,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b461c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:15, skipping insertion in model container [2023-11-19 07:55:15,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (2/3) ... [2023-11-19 07:55:15,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b461c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:15, skipping insertion in model container [2023-11-19 07:55:15,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:15" (3/3) ... [2023-11-19 07:55:15,773 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2023-11-19 07:55:15,789 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:55:15,790 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-19 07:55:15,790 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:55:15,872 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-19 07:55:15,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 120 transitions, 247 flow [2023-11-19 07:55:15,998 INFO L124 PetriNetUnfolderBase]: 23/174 cut-off events. [2023-11-19 07:55:15,998 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:55:16,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 174 events. 23/174 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 519 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 87. Up to 6 conditions per place. [2023-11-19 07:55:16,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 120 transitions, 247 flow [2023-11-19 07:55:16,016 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 120 transitions, 247 flow [2023-11-19 07:55:16,028 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:55:16,048 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 120 transitions, 247 flow [2023-11-19 07:55:16,051 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 120 transitions, 247 flow [2023-11-19 07:55:16,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 120 transitions, 247 flow [2023-11-19 07:55:16,096 INFO L124 PetriNetUnfolderBase]: 23/174 cut-off events. [2023-11-19 07:55:16,096 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:55:16,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 174 events. 23/174 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 519 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 87. Up to 6 conditions per place. [2023-11-19 07:55:16,102 INFO L119 LiptonReduction]: Number of co-enabled transitions 3360 [2023-11-19 07:55:19,453 INFO L134 LiptonReduction]: Checked pairs total: 5437 [2023-11-19 07:55:19,454 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-11-19 07:55:19,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:19,477 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;@2453d93f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:19,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:55:19,480 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:55:19,480 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-11-19 07:55:19,480 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:55:19,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:19,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:55:19,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:55:19,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:19,487 INFO L85 PathProgramCache]: Analyzing trace with hash 15092, now seen corresponding path program 1 times [2023-11-19 07:55:19,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:19,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618038621] [2023-11-19 07:55:19,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:19,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:19,908 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 07:55:19,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:19,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618038621] [2023-11-19 07:55:19,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618038621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:19,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:19,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:55:19,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363679456] [2023-11-19 07:55:19,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:19,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:19,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:19,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:19,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:20,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 228 [2023-11-19 07:55:20,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 40 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 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 07:55:20,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:20,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 228 [2023-11-19 07:55:20,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:20,217 INFO L124 PetriNetUnfolderBase]: 137/303 cut-off events. [2023-11-19 07:55:20,217 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:55:20,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 609 conditions, 303 events. 137/303 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1102 event pairs, 105 based on Foata normal form. 17/234 useless extension candidates. Maximal degree in co-relation 579. Up to 289 conditions per place. [2023-11-19 07:55:20,226 INFO L140 encePairwiseOnDemand]: 215/228 looper letters, 36 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2023-11-19 07:55:20,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 41 transitions, 167 flow [2023-11-19 07:55:20,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:20,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:20,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 347 transitions. [2023-11-19 07:55:20,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073099415204678 [2023-11-19 07:55:20,254 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 347 transitions. [2023-11-19 07:55:20,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 347 transitions. [2023-11-19 07:55:20,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:20,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 347 transitions. [2023-11-19 07:55:20,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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 07:55:20,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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 07:55:20,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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 07:55:20,277 INFO L175 Difference]: Start difference. First operand has 32 places, 40 transitions, 87 flow. Second operand 3 states and 347 transitions. [2023-11-19 07:55:20,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 41 transitions, 167 flow [2023-11-19 07:55:20,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 167 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:55:20,284 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 77 flow [2023-11-19 07:55:20,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-11-19 07:55:20,291 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-11-19 07:55:20,292 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 77 flow [2023-11-19 07:55:20,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 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 07:55:20,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:20,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:55:20,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:55:20,294 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:55:20,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:20,296 INFO L85 PathProgramCache]: Analyzing trace with hash 15091, now seen corresponding path program 1 times [2023-11-19 07:55:20,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:20,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477997321] [2023-11-19 07:55:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:20,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:20,402 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 07:55:20,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:20,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477997321] [2023-11-19 07:55:20,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477997321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:20,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:20,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:55:20,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930335355] [2023-11-19 07:55:20,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:20,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:20,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:20,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:20,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:20,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 228 [2023-11-19 07:55:20,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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 07:55:20,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:20,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 228 [2023-11-19 07:55:20,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:20,522 INFO L124 PetriNetUnfolderBase]: 113/250 cut-off events. [2023-11-19 07:55:20,522 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-19 07:55:20,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 250 events. 113/250 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 875 event pairs, 96 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 513. Up to 228 conditions per place. [2023-11-19 07:55:20,525 INFO L140 encePairwiseOnDemand]: 224/228 looper letters, 32 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-11-19 07:55:20,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 157 flow [2023-11-19 07:55:20,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:20,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:20,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-11-19 07:55:20,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4692982456140351 [2023-11-19 07:55:20,528 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-11-19 07:55:20,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-11-19 07:55:20,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:20,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-11-19 07:55:20,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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 07:55:20,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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 07:55:20,534 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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 07:55:20,534 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 77 flow. Second operand 3 states and 321 transitions. [2023-11-19 07:55:20,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 157 flow [2023-11-19 07:55:20,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 153 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:55:20,537 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 73 flow [2023-11-19 07:55:20,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-11-19 07:55:20,538 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-11-19 07:55:20,539 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 73 flow [2023-11-19 07:55:20,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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 07:55:20,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:20,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:55:20,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:55:20,540 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:55:20,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:20,541 INFO L85 PathProgramCache]: Analyzing trace with hash 449879807, now seen corresponding path program 1 times [2023-11-19 07:55:20,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:20,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523263164] [2023-11-19 07:55:20,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:20,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:20,723 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 07:55:20,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:20,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523263164] [2023-11-19 07:55:20,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523263164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:20,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873562620] [2023-11-19 07:55:20,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:20,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:20,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:20,725 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:20,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:55:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:20,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:55:20,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:20,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:55:20,945 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 07:55:20,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:21,038 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 07:55:21,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873562620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:21,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:21,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 07:55:21,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097509160] [2023-11-19 07:55:21,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:21,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:55:21,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:21,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:55:21,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:55:21,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 228 [2023-11-19 07:55:21,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 73 flow. Second operand has 8 states, 8 states have (on average 94.875) internal successors, (759), 8 states have internal predecessors, (759), 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 07:55:21,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:21,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 228 [2023-11-19 07:55:21,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:21,302 INFO L124 PetriNetUnfolderBase]: 16/55 cut-off events. [2023-11-19 07:55:21,302 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:55:21,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 55 events. 16/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 134 event pairs, 0 based on Foata normal form. 9/64 useless extension candidates. Maximal degree in co-relation 109. Up to 34 conditions per place. [2023-11-19 07:55:21,303 INFO L140 encePairwiseOnDemand]: 224/228 looper letters, 19 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-11-19 07:55:21,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 96 flow [2023-11-19 07:55:21,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:55:21,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:55:21,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 395 transitions. [2023-11-19 07:55:21,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331140350877193 [2023-11-19 07:55:21,306 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 395 transitions. [2023-11-19 07:55:21,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 395 transitions. [2023-11-19 07:55:21,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:21,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 395 transitions. [2023-11-19 07:55:21,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 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 07:55:21,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 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 07:55:21,312 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 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 07:55:21,312 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 73 flow. Second operand 4 states and 395 transitions. [2023-11-19 07:55:21,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 96 flow [2023-11-19 07:55:21,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 93 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:55:21,314 INFO L231 Difference]: Finished difference. Result has 21 places, 14 transitions, 37 flow [2023-11-19 07:55:21,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=37, PETRI_PLACES=21, PETRI_TRANSITIONS=14} [2023-11-19 07:55:21,316 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -11 predicate places. [2023-11-19 07:55:21,316 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 14 transitions, 37 flow [2023-11-19 07:55:21,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 94.875) internal successors, (759), 8 states have internal predecessors, (759), 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 07:55:21,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:21,318 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:55:21,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:21,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:21,538 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:55:21,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:21,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1061372399, now seen corresponding path program 1 times [2023-11-19 07:55:21,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:21,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542333353] [2023-11-19 07:55:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:21,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:21,560 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:21,600 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:21,600 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:55:21,602 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 07:55:21,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-19 07:55:21,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-19 07:55:21,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-19 07:55:21,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-19 07:55:21,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-19 07:55:21,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-19 07:55:21,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:55:21,606 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:55:21,609 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:55:21,609 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:55:21,637 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:55:21,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 150 transitions, 316 flow [2023-11-19 07:55:21,684 INFO L124 PetriNetUnfolderBase]: 40/289 cut-off events. [2023-11-19 07:55:21,684 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:55:21,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 289 events. 40/289 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 986 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 176. Up to 9 conditions per place. [2023-11-19 07:55:21,687 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 150 transitions, 316 flow [2023-11-19 07:55:21,690 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 150 transitions, 316 flow [2023-11-19 07:55:21,691 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:55:21,691 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 150 transitions, 316 flow [2023-11-19 07:55:21,691 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 150 transitions, 316 flow [2023-11-19 07:55:21,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 150 transitions, 316 flow [2023-11-19 07:55:21,727 INFO L124 PetriNetUnfolderBase]: 40/289 cut-off events. [2023-11-19 07:55:21,727 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:55:21,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 289 events. 40/289 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 986 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 176. Up to 9 conditions per place. [2023-11-19 07:55:21,739 INFO L119 LiptonReduction]: Number of co-enabled transitions 8904 [2023-11-19 07:55:24,900 INFO L134 LiptonReduction]: Checked pairs total: 19853 [2023-11-19 07:55:24,900 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-11-19 07:55:24,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:24,903 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;@2453d93f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:24,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:55:24,908 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:55:24,909 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-11-19 07:55:24,909 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:55:24,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:24,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:55:24,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:55:24,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:24,910 INFO L85 PathProgramCache]: Analyzing trace with hash 24596, now seen corresponding path program 1 times [2023-11-19 07:55:24,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:24,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418052251] [2023-11-19 07:55:24,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:24,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:24,954 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 07:55:24,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:24,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418052251] [2023-11-19 07:55:24,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418052251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:24,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:24,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:55:24,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237330657] [2023-11-19 07:55:24,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:24,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:24,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:24,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:24,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:24,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 268 [2023-11-19 07:55:24,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 63 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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 07:55:24,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:24,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 268 [2023-11-19 07:55:24,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:25,506 INFO L124 PetriNetUnfolderBase]: 2085/3627 cut-off events. [2023-11-19 07:55:25,507 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-11-19 07:55:25,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7038 conditions, 3627 events. 2085/3627 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 22056 event pairs, 1710 based on Foata normal form. 554/3547 useless extension candidates. Maximal degree in co-relation 3125. Up to 2898 conditions per place. [2023-11-19 07:55:25,536 INFO L140 encePairwiseOnDemand]: 248/268 looper letters, 48 selfloop transitions, 2 changer transitions 1/61 dead transitions. [2023-11-19 07:55:25,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 240 flow [2023-11-19 07:55:25,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:25,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:25,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-11-19 07:55:25,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5360696517412935 [2023-11-19 07:55:25,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-11-19 07:55:25,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-11-19 07:55:25,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:25,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-11-19 07:55:25,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 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 07:55:25,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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 07:55:25,545 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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 07:55:25,545 INFO L175 Difference]: Start difference. First operand has 50 places, 63 transitions, 142 flow. Second operand 3 states and 431 transitions. [2023-11-19 07:55:25,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 240 flow [2023-11-19 07:55:25,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 240 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:55:25,550 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 110 flow [2023-11-19 07:55:25,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-11-19 07:55:25,553 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-11-19 07:55:25,553 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 110 flow [2023-11-19 07:55:25,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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 07:55:25,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:25,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:55:25,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:55:25,554 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:55:25,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:25,555 INFO L85 PathProgramCache]: Analyzing trace with hash 24597, now seen corresponding path program 1 times [2023-11-19 07:55:25,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:25,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242293076] [2023-11-19 07:55:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:25,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:25,647 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 07:55:25,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:25,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242293076] [2023-11-19 07:55:25,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242293076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:25,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:25,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:55:25,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938631426] [2023-11-19 07:55:25,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:25,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:25,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:25,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:25,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:25,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 268 [2023-11-19 07:55:25,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 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 07:55:25,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:25,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 268 [2023-11-19 07:55:25,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:26,136 INFO L124 PetriNetUnfolderBase]: 1941/3295 cut-off events. [2023-11-19 07:55:26,137 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-11-19 07:55:26,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6557 conditions, 3295 events. 1941/3295 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 19123 event pairs, 1567 based on Foata normal form. 0/2847 useless extension candidates. Maximal degree in co-relation 5990. Up to 3112 conditions per place. [2023-11-19 07:55:26,165 INFO L140 encePairwiseOnDemand]: 264/268 looper letters, 42 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-11-19 07:55:26,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 54 transitions, 216 flow [2023-11-19 07:55:26,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:26,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-11-19 07:55:26,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012437810945274 [2023-11-19 07:55:26,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-11-19 07:55:26,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-11-19 07:55:26,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:26,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-11-19 07:55:26,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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 07:55:26,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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 07:55:26,173 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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 07:55:26,173 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 110 flow. Second operand 3 states and 403 transitions. [2023-11-19 07:55:26,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 54 transitions, 216 flow [2023-11-19 07:55:26,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:55:26,181 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 120 flow [2023-11-19 07:55:26,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-19 07:55:26,186 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-11-19 07:55:26,186 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 120 flow [2023-11-19 07:55:26,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 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 07:55:26,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:26,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:55:26,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:55:26,187 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:55:26,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:26,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1258152540, now seen corresponding path program 1 times [2023-11-19 07:55:26,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:26,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538761791] [2023-11-19 07:55:26,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:26,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:26,348 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 07:55:26,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:26,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538761791] [2023-11-19 07:55:26,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538761791] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:26,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209636754] [2023-11-19 07:55:26,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:26,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:26,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:26,351 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:26,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:55:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:26,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:55:26,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:26,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:55:26,517 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 07:55:26,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:26,577 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 07:55:26,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209636754] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:26,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:26,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 07:55:26,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037844300] [2023-11-19 07:55:26,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:26,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:55:26,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:26,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:55:26,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:55:26,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 268 [2023-11-19 07:55:26,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 120 flow. Second operand has 8 states, 8 states have (on average 116.875) internal successors, (935), 8 states have internal predecessors, (935), 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 07:55:26,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:26,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 268 [2023-11-19 07:55:26,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:26,952 INFO L124 PetriNetUnfolderBase]: 331/682 cut-off events. [2023-11-19 07:55:26,954 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2023-11-19 07:55:26,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1376 conditions, 682 events. 331/682 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3468 event pairs, 0 based on Foata normal form. 80/761 useless extension candidates. Maximal degree in co-relation 173. Up to 398 conditions per place. [2023-11-19 07:55:26,960 INFO L140 encePairwiseOnDemand]: 264/268 looper letters, 42 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-11-19 07:55:26,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 216 flow [2023-11-19 07:55:26,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:55:26,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:55:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 624 transitions. [2023-11-19 07:55:26,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46567164179104475 [2023-11-19 07:55:26,964 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 624 transitions. [2023-11-19 07:55:26,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 624 transitions. [2023-11-19 07:55:26,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:26,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 624 transitions. [2023-11-19 07:55:26,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 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 07:55:26,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 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 07:55:26,972 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 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 07:55:26,972 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 120 flow. Second operand 5 states and 624 transitions. [2023-11-19 07:55:26,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 216 flow [2023-11-19 07:55:26,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:55:26,977 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-11-19 07:55:26,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-11-19 07:55:26,978 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -10 predicate places. [2023-11-19 07:55:26,979 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-11-19 07:55:26,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 116.875) internal successors, (935), 8 states have internal predecessors, (935), 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 07:55:26,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:26,980 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:55:27,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:27,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:27,195 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:55:27,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:27,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1863865578, now seen corresponding path program 1 times [2023-11-19 07:55:27,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:27,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051521172] [2023-11-19 07:55:27,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:27,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:27,216 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:27,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:27,240 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:27,241 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:55:27,241 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 07:55:27,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-19 07:55:27,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-19 07:55:27,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-19 07:55:27,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-19 07:55:27,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-19 07:55:27,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-19 07:55:27,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:55:27,243 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:55:27,244 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:55:27,244 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:55:27,274 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:55:27,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 180 transitions, 387 flow [2023-11-19 07:55:27,340 INFO L124 PetriNetUnfolderBase]: 62/449 cut-off events. [2023-11-19 07:55:27,340 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:55:27,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 449 events. 62/449 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1706 event pairs, 1 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 297. Up to 16 conditions per place. [2023-11-19 07:55:27,345 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 180 transitions, 387 flow [2023-11-19 07:55:27,350 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 180 transitions, 387 flow [2023-11-19 07:55:27,354 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:55:27,355 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 180 transitions, 387 flow [2023-11-19 07:55:27,355 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 180 transitions, 387 flow [2023-11-19 07:55:27,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 180 transitions, 387 flow [2023-11-19 07:55:27,426 INFO L124 PetriNetUnfolderBase]: 62/449 cut-off events. [2023-11-19 07:55:27,427 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:55:27,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 449 events. 62/449 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1706 event pairs, 1 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 297. Up to 16 conditions per place. [2023-11-19 07:55:27,449 INFO L119 LiptonReduction]: Number of co-enabled transitions 15960 [2023-11-19 07:55:30,664 INFO L134 LiptonReduction]: Checked pairs total: 37840 [2023-11-19 07:55:30,665 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-11-19 07:55:30,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:30,668 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;@2453d93f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:30,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:55:30,670 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:55:30,670 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-19 07:55:30,670 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:55:30,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:30,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:55:30,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:55:30,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:30,671 INFO L85 PathProgramCache]: Analyzing trace with hash 35541, now seen corresponding path program 1 times [2023-11-19 07:55:30,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:30,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191657943] [2023-11-19 07:55:30,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:30,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:30,711 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 07:55:30,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:30,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191657943] [2023-11-19 07:55:30,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191657943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:30,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:30,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:55:30,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105919805] [2023-11-19 07:55:30,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:30,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:30,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:30,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:30,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:30,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 312 [2023-11-19 07:55:30,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 82 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 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 07:55:30,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:30,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 312 [2023-11-19 07:55:30,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:35,741 INFO L124 PetriNetUnfolderBase]: 26456/39784 cut-off events. [2023-11-19 07:55:35,741 INFO L125 PetriNetUnfolderBase]: For 889/889 co-relation queries the response was YES. [2023-11-19 07:55:35,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77670 conditions, 39784 events. 26456/39784 cut-off events. For 889/889 co-relation queries the response was YES. Maximal size of possible extension queue 1145. Compared 287070 event pairs, 21927 based on Foata normal form. 7208/41039 useless extension candidates. Maximal degree in co-relation 17695. Up to 31908 conditions per place. [2023-11-19 07:55:35,995 INFO L140 encePairwiseOnDemand]: 286/312 looper letters, 64 selfloop transitions, 2 changer transitions 1/81 dead transitions. [2023-11-19 07:55:35,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 81 transitions, 323 flow [2023-11-19 07:55:35,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:35,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:35,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2023-11-19 07:55:35,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608974358974359 [2023-11-19 07:55:35,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2023-11-19 07:55:35,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2023-11-19 07:55:35,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:36,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2023-11-19 07:55:36,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 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 07:55:36,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 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 07:55:36,004 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 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 07:55:36,005 INFO L175 Difference]: Start difference. First operand has 64 places, 82 transitions, 191 flow. Second operand 3 states and 525 transitions. [2023-11-19 07:55:36,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 81 transitions, 323 flow [2023-11-19 07:55:36,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 323 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:55:36,009 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 147 flow [2023-11-19 07:55:36,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-11-19 07:55:36,010 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places. [2023-11-19 07:55:36,010 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 147 flow [2023-11-19 07:55:36,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 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 07:55:36,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:36,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:55:36,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:55:36,011 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:55:36,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:36,012 INFO L85 PathProgramCache]: Analyzing trace with hash 35542, now seen corresponding path program 1 times [2023-11-19 07:55:36,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:36,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109842800] [2023-11-19 07:55:36,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:36,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:36,067 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 07:55:36,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:36,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109842800] [2023-11-19 07:55:36,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109842800] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:36,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:36,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:55:36,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886074021] [2023-11-19 07:55:36,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:36,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:36,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:36,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:36,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:36,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 312 [2023-11-19 07:55:36,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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 07:55:36,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:36,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 312 [2023-11-19 07:55:36,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:39,468 INFO L124 PetriNetUnfolderBase]: 24574/36637 cut-off events. [2023-11-19 07:55:39,468 INFO L125 PetriNetUnfolderBase]: For 1480/1480 co-relation queries the response was YES. [2023-11-19 07:55:39,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72636 conditions, 36637 events. 24574/36637 cut-off events. For 1480/1480 co-relation queries the response was YES. Maximal size of possible extension queue 1053. Compared 257331 event pairs, 22734 based on Foata normal form. 0/32468 useless extension candidates. Maximal degree in co-relation 66418. Up to 34569 conditions per place. [2023-11-19 07:55:39,846 INFO L140 encePairwiseOnDemand]: 308/312 looper letters, 52 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-11-19 07:55:39,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 68 transitions, 275 flow [2023-11-19 07:55:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:39,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:39,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2023-11-19 07:55:39,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117521367521367 [2023-11-19 07:55:39,849 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2023-11-19 07:55:39,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2023-11-19 07:55:39,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:39,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2023-11-19 07:55:39,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 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 07:55:39,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 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 07:55:39,855 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 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 07:55:39,855 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 147 flow. Second operand 3 states and 479 transitions. [2023-11-19 07:55:39,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 68 transitions, 275 flow [2023-11-19 07:55:39,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 68 transitions, 271 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:55:39,926 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 157 flow [2023-11-19 07:55:39,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-11-19 07:55:39,928 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places. [2023-11-19 07:55:39,928 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 157 flow [2023-11-19 07:55:39,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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 07:55:39,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:39,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:55:39,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:55:39,929 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:55:39,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:39,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1508802659, now seen corresponding path program 1 times [2023-11-19 07:55:39,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:39,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67430258] [2023-11-19 07:55:39,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:39,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:40,045 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 07:55:40,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:40,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67430258] [2023-11-19 07:55:40,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67430258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:40,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709530957] [2023-11-19 07:55:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:40,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:40,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:40,052 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:40,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:55:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:40,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:55:40,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:40,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:55:40,208 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 07:55:40,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:40,258 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 07:55:40,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709530957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:40,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:40,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 07:55:40,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895391553] [2023-11-19 07:55:40,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:40,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:55:40,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:40,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:55:40,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:55:40,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 312 [2023-11-19 07:55:40,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 157 flow. Second operand has 8 states, 8 states have (on average 138.875) internal successors, (1111), 8 states have internal predecessors, (1111), 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 07:55:40,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:40,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 312 [2023-11-19 07:55:40,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:41,427 INFO L124 PetriNetUnfolderBase]: 4372/7186 cut-off events. [2023-11-19 07:55:41,427 INFO L125 PetriNetUnfolderBase]: For 2835/2835 co-relation queries the response was YES. [2023-11-19 07:55:41,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14558 conditions, 7186 events. 4372/7186 cut-off events. For 2835/2835 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 47175 event pairs, 504 based on Foata normal form. 657/7807 useless extension candidates. Maximal degree in co-relation 1660. Up to 4122 conditions per place. [2023-11-19 07:55:41,475 INFO L140 encePairwiseOnDemand]: 308/312 looper letters, 75 selfloop transitions, 4 changer transitions 0/92 dead transitions. [2023-11-19 07:55:41,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 92 transitions, 370 flow [2023-11-19 07:55:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:55:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:55:41,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 907 transitions. [2023-11-19 07:55:41,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484508547008547 [2023-11-19 07:55:41,495 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 907 transitions. [2023-11-19 07:55:41,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 907 transitions. [2023-11-19 07:55:41,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:41,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 907 transitions. [2023-11-19 07:55:41,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 151.16666666666666) internal successors, (907), 6 states have internal predecessors, (907), 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 07:55:41,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 312.0) internal successors, (2184), 7 states have internal predecessors, (2184), 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 07:55:41,514 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 312.0) internal successors, (2184), 7 states have internal predecessors, (2184), 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 07:55:41,514 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 157 flow. Second operand 6 states and 907 transitions. [2023-11-19 07:55:41,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 92 transitions, 370 flow [2023-11-19 07:55:41,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 92 transitions, 366 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:55:41,523 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 118 flow [2023-11-19 07:55:41,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-11-19 07:55:41,525 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -9 predicate places. [2023-11-19 07:55:41,525 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 118 flow [2023-11-19 07:55:41,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 138.875) internal successors, (1111), 8 states have internal predecessors, (1111), 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 07:55:41,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:41,526 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-19 07:55:41,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:41,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a3f2bc-d9f0-4b23-8a87-fa304d2c9c9f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:41,747 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:55:41,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:41,747 INFO L85 PathProgramCache]: Analyzing trace with hash 391348266, now seen corresponding path program 1 times [2023-11-19 07:55:41,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:41,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657548457] [2023-11-19 07:55:41,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:41,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:41,768 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:41,788 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:41,788 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:55:41,789 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 07:55:41,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-19 07:55:41,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-19 07:55:41,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-19 07:55:41,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-19 07:55:41,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-19 07:55:41,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-19 07:55:41,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:55:41,791 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:55:41,792 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:55:41,792 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-19 07:55:41,823 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-19 07:55:41,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 210 transitions, 460 flow [2023-11-19 07:55:41,961 INFO L124 PetriNetUnfolderBase]: 96/701 cut-off events. [2023-11-19 07:55:41,961 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-19 07:55:41,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 701 events. 96/701 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3090 event pairs, 6 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 469. Up to 32 conditions per place. [2023-11-19 07:55:41,971 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 210 transitions, 460 flow [2023-11-19 07:55:41,978 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 210 transitions, 460 flow [2023-11-19 07:55:41,978 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:55:41,978 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 210 transitions, 460 flow [2023-11-19 07:55:41,979 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 210 transitions, 460 flow [2023-11-19 07:55:41,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 210 transitions, 460 flow [2023-11-19 07:55:42,104 INFO L124 PetriNetUnfolderBase]: 96/701 cut-off events. [2023-11-19 07:55:42,105 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-19 07:55:42,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 701 events. 96/701 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3090 event pairs, 6 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 469. Up to 32 conditions per place. [2023-11-19 07:55:42,136 INFO L119 LiptonReduction]: Number of co-enabled transitions 24752 [2023-11-19 07:55:45,550 INFO L134 LiptonReduction]: Checked pairs total: 64724 [2023-11-19 07:55:45,551 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-11-19 07:55:45,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:45,553 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;@2453d93f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:45,553 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 07:55:45,554 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:55:45,555 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-11-19 07:55:45,555 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:55:45,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:45,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:55:45,555 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 07:55:45,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:45,556 INFO L85 PathProgramCache]: Analyzing trace with hash 47957, now seen corresponding path program 1 times [2023-11-19 07:55:45,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:45,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811828328] [2023-11-19 07:55:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:45,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:45,584 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 07:55:45,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:45,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811828328] [2023-11-19 07:55:45,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811828328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:45,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:45,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:55:45,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92881877] [2023-11-19 07:55:45,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:45,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:45,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:45,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:45,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:45,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 358 [2023-11-19 07:55:45,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 101 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 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 07:55:45,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:45,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 358 [2023-11-19 07:55:45,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand