./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 e7bb482b 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_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/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_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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-e7bb482 [2023-11-06 21:53:45,486 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:53:45,609 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 21:53:45,618 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:53:45,619 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:53:45,657 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:53:45,658 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:53:45,658 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:53:45,659 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:53:45,664 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:53:45,665 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:53:45,666 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:53:45,666 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:53:45,668 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:53:45,668 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:53:45,669 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:53:45,669 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:53:45,669 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:53:45,670 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:53:45,670 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:53:45,670 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:53:45,671 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:53:45,671 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:53:45,672 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:53:45,672 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:53:45,673 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:53:45,673 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:53:45,674 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:53:45,674 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:53:45,674 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:45,675 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:53:45,675 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:53:45,676 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:53:45,676 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:53:45,676 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:53:45,676 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:53:45,676 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:53:45,677 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:53:45,677 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_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 [2023-11-06 21:53:45,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:53:46,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:53:46,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:53:46,034 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:53:46,035 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:53:46,037 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-11-06 21:53:49,246 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:53:49,601 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:53:49,604 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-11-06 21:53:49,628 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/data/bb290bf46/d9ad5e9b2b8243b28e28d529b7831de6/FLAGfa9d9d171 [2023-11-06 21:53:49,650 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/data/bb290bf46/d9ad5e9b2b8243b28e28d529b7831de6 [2023-11-06 21:53:49,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:53:49,658 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:53:49,661 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:49,662 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:53:49,667 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:53:49,668 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:49" (1/1) ... [2023-11-06 21:53:49,669 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ece1f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:49, skipping insertion in model container [2023-11-06 21:53:49,670 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:49" (1/1) ... [2023-11-06 21:53:49,730 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:53:50,127 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:50,142 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:53:50,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:50,229 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:53:50,229 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50 WrapperNode [2023-11-06 21:53:50,229 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:50,231 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:50,231 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:53:50,231 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:53:50,239 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,254 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,279 INFO L138 Inliner]: procedures = 171, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2023-11-06 21:53:50,279 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:50,280 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:53:50,280 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:53:50,281 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:53:50,290 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,290 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,294 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,294 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,301 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,305 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,308 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,309 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,313 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:53:50,314 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:53:50,314 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:53:50,314 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:53:50,315 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (1/1) ... [2023-11-06 21:53:50,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:50,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:50,351 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:53:50,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:53:50,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:53:50,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:53:50,389 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 21:53:50,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:53:50,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:53:50,390 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 21:53:50,390 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 21:53:50,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:53:50,390 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-11-06 21:53:50,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:53:50,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:53:50,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:53:50,393 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:53:50,526 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:53:50,529 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:53:50,760 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:53:50,789 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:53:50,789 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-06 21:53:50,791 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:50 BoogieIcfgContainer [2023-11-06 21:53:50,792 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:53:50,794 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:53:50,795 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:53:50,798 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:53:50,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:53:49" (1/3) ... [2023-11-06 21:53:50,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f1c92a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:50, skipping insertion in model container [2023-11-06 21:53:50,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:50" (2/3) ... [2023-11-06 21:53:50,800 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f1c92a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:50, skipping insertion in model container [2023-11-06 21:53:50,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:50" (3/3) ... [2023-11-06 21:53:50,801 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2023-11-06 21:53:50,822 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:53:50,822 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-06 21:53:50,822 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:53:50,885 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 21:53:50,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 120 transitions, 247 flow [2023-11-06 21:53:51,047 INFO L124 PetriNetUnfolderBase]: 23/174 cut-off events. [2023-11-06 21:53:51,047 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:53:51,057 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. [2023-11-06 21:53:51,057 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 120 transitions, 247 flow [2023-11-06 21:53:51,063 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 120 transitions, 247 flow [2023-11-06 21:53:51,067 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:53:51,078 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 120 transitions, 247 flow [2023-11-06 21:53:51,080 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 120 transitions, 247 flow [2023-11-06 21:53:51,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 120 transitions, 247 flow [2023-11-06 21:53:51,120 INFO L124 PetriNetUnfolderBase]: 23/174 cut-off events. [2023-11-06 21:53:51,120 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:53:51,122 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. [2023-11-06 21:53:51,126 INFO L119 LiptonReduction]: Number of co-enabled transitions 3360 [2023-11-06 21:53:54,541 INFO L134 LiptonReduction]: Checked pairs total: 5437 [2023-11-06 21:53:54,541 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-11-06 21:53:54,558 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:53:54,565 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;@69084a63, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:53:54,566 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 21:53:54,569 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:53:54,569 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-11-06 21:53:54,569 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:53:54,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:54,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 21:53:54,571 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)] === [2023-11-06 21:53:54,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:54,577 INFO L85 PathProgramCache]: Analyzing trace with hash 15092, now seen corresponding path program 1 times [2023-11-06 21:53:54,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:54,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997859623] [2023-11-06 21:53:54,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:54,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:54,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:54,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997859623] [2023-11-06 21:53:54,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997859623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:54,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:54,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:53:54,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665945754] [2023-11-06 21:53:54,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:54,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:54,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:54,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:54,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:55,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 228 [2023-11-06 21:53:55,074 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) [2023-11-06 21:53:55,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:55,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 228 [2023-11-06 21:53:55,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:55,252 INFO L124 PetriNetUnfolderBase]: 137/303 cut-off events. [2023-11-06 21:53:55,252 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:53:55,256 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. [2023-11-06 21:53:55,263 INFO L140 encePairwiseOnDemand]: 215/228 looper letters, 36 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2023-11-06 21:53:55,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 41 transitions, 167 flow [2023-11-06 21:53:55,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:53:55,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 347 transitions. [2023-11-06 21:53:55,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073099415204678 [2023-11-06 21:53:55,303 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 347 transitions. [2023-11-06 21:53:55,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 347 transitions. [2023-11-06 21:53:55,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:55,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 347 transitions. [2023-11-06 21:53:55,322 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) [2023-11-06 21:53:55,328 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) [2023-11-06 21:53:55,331 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) [2023-11-06 21:53:55,333 INFO L175 Difference]: Start difference. First operand has 32 places, 40 transitions, 87 flow. Second operand 3 states and 347 transitions. [2023-11-06 21:53:55,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 41 transitions, 167 flow [2023-11-06 21:53:55,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 167 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 21:53:55,341 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 77 flow [2023-11-06 21:53:55,343 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} [2023-11-06 21:53:55,349 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-11-06 21:53:55,349 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 77 flow [2023-11-06 21:53:55,367 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) [2023-11-06 21:53:55,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:55,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 21:53:55,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:53:55,370 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)] === [2023-11-06 21:53:55,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:55,374 INFO L85 PathProgramCache]: Analyzing trace with hash 15091, now seen corresponding path program 1 times [2023-11-06 21:53:55,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:55,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923925974] [2023-11-06 21:53:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:55,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:55,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:55,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923925974] [2023-11-06 21:53:55,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923925974] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:55,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:55,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:53:55,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994671308] [2023-11-06 21:53:55,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:55,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:55,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:55,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:55,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:55,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 228 [2023-11-06 21:53:55,553 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) [2023-11-06 21:53:55,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:55,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 228 [2023-11-06 21:53:55,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:55,641 INFO L124 PetriNetUnfolderBase]: 113/250 cut-off events. [2023-11-06 21:53:55,642 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-06 21:53:55,642 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. [2023-11-06 21:53:55,644 INFO L140 encePairwiseOnDemand]: 224/228 looper letters, 32 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-11-06 21:53:55,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 157 flow [2023-11-06 21:53:55,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:55,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:53:55,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-11-06 21:53:55,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4692982456140351 [2023-11-06 21:53:55,649 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-11-06 21:53:55,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-11-06 21:53:55,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:55,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-11-06 21:53:55,651 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) [2023-11-06 21:53:55,654 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) [2023-11-06 21:53:55,655 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) [2023-11-06 21:53:55,655 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 77 flow. Second operand 3 states and 321 transitions. [2023-11-06 21:53:55,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 157 flow [2023-11-06 21:53:55,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 153 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:53:55,658 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 73 flow [2023-11-06 21:53:55,658 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} [2023-11-06 21:53:55,659 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-11-06 21:53:55,659 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 73 flow [2023-11-06 21:53:55,660 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) [2023-11-06 21:53:55,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:55,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:53:55,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:53:55,661 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)] === [2023-11-06 21:53:55,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:55,662 INFO L85 PathProgramCache]: Analyzing trace with hash 449879807, now seen corresponding path program 1 times [2023-11-06 21:53:55,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:55,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077642227] [2023-11-06 21:53:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:55,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:55,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:55,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077642227] [2023-11-06 21:53:55,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077642227] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:55,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992515288] [2023-11-06 21:53:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:55,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:55,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:55,864 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:55,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:53:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:55,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:53:55,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:56,050 INFO L351 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 [2023-11-06 21:53:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:56,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:56,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992515288] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:56,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:56,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-06 21:53:56,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317261108] [2023-11-06 21:53:56,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:56,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:53:56,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:56,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:53:56,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:53:56,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 228 [2023-11-06 21:53:56,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 73 flow. Second operand has 7 states, 7 states have (on average 95.71428571428571) internal successors, (670), 7 states have internal predecessors, (670), 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) [2023-11-06 21:53:56,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:56,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 228 [2023-11-06 21:53:56,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:56,409 INFO L124 PetriNetUnfolderBase]: 16/48 cut-off events. [2023-11-06 21:53:56,409 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 21:53:56,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 48 events. 16/48 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 7 based on Foata normal form. 9/57 useless extension candidates. Maximal degree in co-relation 102. Up to 34 conditions per place. [2023-11-06 21:53:56,410 INFO L140 encePairwiseOnDemand]: 224/228 looper letters, 19 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-11-06 21:53:56,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 96 flow [2023-11-06 21:53:56,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:53:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:53:56,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 399 transitions. [2023-11-06 21:53:56,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-11-06 21:53:56,413 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 399 transitions. [2023-11-06 21:53:56,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 399 transitions. [2023-11-06 21:53:56,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:56,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 399 transitions. [2023-11-06 21:53:56,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.75) internal successors, (399), 4 states have internal predecessors, (399), 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) [2023-11-06 21:53:56,418 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) [2023-11-06 21:53:56,419 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) [2023-11-06 21:53:56,419 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 73 flow. Second operand 4 states and 399 transitions. [2023-11-06 21:53:56,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 96 flow [2023-11-06 21:53:56,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 93 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:53:56,421 INFO L231 Difference]: Finished difference. Result has 21 places, 14 transitions, 37 flow [2023-11-06 21:53:56,424 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} [2023-11-06 21:53:56,425 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -11 predicate places. [2023-11-06 21:53:56,425 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 14 transitions, 37 flow [2023-11-06 21:53:56,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 95.71428571428571) internal successors, (670), 7 states have internal predecessors, (670), 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) [2023-11-06 21:53:56,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:56,427 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 21:53:56,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 21:53:56,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:56,628 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)] === [2023-11-06 21:53:56,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:56,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1061372399, now seen corresponding path program 1 times [2023-11-06 21:53:56,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:56,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704913386] [2023-11-06 21:53:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:56,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:53:56,649 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 21:53:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:53:56,677 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 21:53:56,678 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 21:53:56,679 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-06 21:53:56,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-06 21:53:56,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-06 21:53:56,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-06 21:53:56,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-06 21:53:56,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-06 21:53:56,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-06 21:53:56,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:53:56,682 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-06 21:53:56,685 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 21:53:56,685 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 21:53:56,718 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 21:53:56,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 150 transitions, 316 flow [2023-11-06 21:53:56,761 INFO L124 PetriNetUnfolderBase]: 40/289 cut-off events. [2023-11-06 21:53:56,761 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 21:53:56,764 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. [2023-11-06 21:53:56,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 150 transitions, 316 flow [2023-11-06 21:53:56,767 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 150 transitions, 316 flow [2023-11-06 21:53:56,768 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:53:56,768 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 150 transitions, 316 flow [2023-11-06 21:53:56,768 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 150 transitions, 316 flow [2023-11-06 21:53:56,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 150 transitions, 316 flow [2023-11-06 21:53:56,807 INFO L124 PetriNetUnfolderBase]: 40/289 cut-off events. [2023-11-06 21:53:56,808 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 21:53:56,810 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. [2023-11-06 21:53:56,819 INFO L119 LiptonReduction]: Number of co-enabled transitions 8904 [2023-11-06 21:54:00,141 INFO L134 LiptonReduction]: Checked pairs total: 19853 [2023-11-06 21:54:00,141 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-11-06 21:54:00,144 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:54:00,145 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;@69084a63, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:54:00,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 21:54:00,147 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:54:00,148 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-11-06 21:54:00,148 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:54:00,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:00,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 21:54:00,148 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)] === [2023-11-06 21:54:00,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:00,149 INFO L85 PathProgramCache]: Analyzing trace with hash 24596, now seen corresponding path program 1 times [2023-11-06 21:54:00,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:00,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623568201] [2023-11-06 21:54:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:00,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:00,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:00,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:00,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623568201] [2023-11-06 21:54:00,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623568201] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:00,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:00,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:54:00,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178307218] [2023-11-06 21:54:00,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:00,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:00,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:00,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:00,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:00,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 268 [2023-11-06 21:54:00,219 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) [2023-11-06 21:54:00,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:00,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 268 [2023-11-06 21:54:00,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:00,815 INFO L124 PetriNetUnfolderBase]: 2085/3627 cut-off events. [2023-11-06 21:54:00,815 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-11-06 21:54:00,820 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. [2023-11-06 21:54:00,847 INFO L140 encePairwiseOnDemand]: 248/268 looper letters, 48 selfloop transitions, 2 changer transitions 1/61 dead transitions. [2023-11-06 21:54:00,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 240 flow [2023-11-06 21:54:00,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:00,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:54:00,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-11-06 21:54:00,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5360696517412935 [2023-11-06 21:54:00,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-11-06 21:54:00,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-11-06 21:54:00,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:00,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-11-06 21:54:00,852 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) [2023-11-06 21:54:00,855 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) [2023-11-06 21:54:00,855 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) [2023-11-06 21:54:00,856 INFO L175 Difference]: Start difference. First operand has 50 places, 63 transitions, 142 flow. Second operand 3 states and 431 transitions. [2023-11-06 21:54:00,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 240 flow [2023-11-06 21:54:00,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 240 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 21:54:00,860 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 110 flow [2023-11-06 21:54:00,861 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} [2023-11-06 21:54:00,863 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-11-06 21:54:00,863 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 110 flow [2023-11-06 21:54:00,864 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) [2023-11-06 21:54:00,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:00,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 21:54:00,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:54:00,864 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)] === [2023-11-06 21:54:00,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:00,865 INFO L85 PathProgramCache]: Analyzing trace with hash 24597, now seen corresponding path program 1 times [2023-11-06 21:54:00,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:00,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924123556] [2023-11-06 21:54:00,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:00,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:00,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:00,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924123556] [2023-11-06 21:54:00,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924123556] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:00,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:00,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:54:00,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85853997] [2023-11-06 21:54:00,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:00,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:00,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:00,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:00,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:01,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 268 [2023-11-06 21:54:01,037 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) [2023-11-06 21:54:01,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:01,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 268 [2023-11-06 21:54:01,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:01,525 INFO L124 PetriNetUnfolderBase]: 1941/3295 cut-off events. [2023-11-06 21:54:01,525 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-11-06 21:54:01,529 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. [2023-11-06 21:54:01,552 INFO L140 encePairwiseOnDemand]: 264/268 looper letters, 42 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-11-06 21:54:01,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 54 transitions, 216 flow [2023-11-06 21:54:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:01,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:54:01,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-11-06 21:54:01,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012437810945274 [2023-11-06 21:54:01,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-11-06 21:54:01,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-11-06 21:54:01,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:01,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-11-06 21:54:01,557 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) [2023-11-06 21:54:01,560 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) [2023-11-06 21:54:01,561 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) [2023-11-06 21:54:01,561 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 110 flow. Second operand 3 states and 403 transitions. [2023-11-06 21:54:01,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 54 transitions, 216 flow [2023-11-06 21:54:01,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:54:01,567 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 120 flow [2023-11-06 21:54:01,567 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} [2023-11-06 21:54:01,568 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-11-06 21:54:01,568 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 120 flow [2023-11-06 21:54:01,569 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) [2023-11-06 21:54:01,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:01,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 21:54:01,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:54:01,569 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)] === [2023-11-06 21:54:01,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:01,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1258152540, now seen corresponding path program 1 times [2023-11-06 21:54:01,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:01,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557982083] [2023-11-06 21:54:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:01,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:01,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:01,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557982083] [2023-11-06 21:54:01,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557982083] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:01,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363947946] [2023-11-06 21:54:01,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:01,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:01,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:01,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:01,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:54:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:01,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:54:01,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:01,784 INFO L351 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 [2023-11-06 21:54:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:01,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:01,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363947946] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:01,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:01,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-06 21:54:01,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199613476] [2023-11-06 21:54:01,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:01,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:54:01,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:01,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:54:01,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:54:02,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 268 [2023-11-06 21:54:02,055 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) [2023-11-06 21:54:02,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:02,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 268 [2023-11-06 21:54:02,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:02,251 INFO L124 PetriNetUnfolderBase]: 331/682 cut-off events. [2023-11-06 21:54:02,251 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2023-11-06 21:54:02,254 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. [2023-11-06 21:54:02,259 INFO L140 encePairwiseOnDemand]: 264/268 looper letters, 42 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-11-06 21:54:02,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 216 flow [2023-11-06 21:54:02,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:54:02,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:54:02,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 624 transitions. [2023-11-06 21:54:02,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46567164179104475 [2023-11-06 21:54:02,264 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 624 transitions. [2023-11-06 21:54:02,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 624 transitions. [2023-11-06 21:54:02,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:02,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 624 transitions. [2023-11-06 21:54:02,268 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) [2023-11-06 21:54:02,272 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) [2023-11-06 21:54:02,272 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) [2023-11-06 21:54:02,273 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 120 flow. Second operand 5 states and 624 transitions. [2023-11-06 21:54:02,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 216 flow [2023-11-06 21:54:02,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:54:02,278 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-11-06 21:54:02,278 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} [2023-11-06 21:54:02,280 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -10 predicate places. [2023-11-06 21:54:02,280 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-11-06 21:54:02,280 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) [2023-11-06 21:54:02,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:02,281 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 21:54:02,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 21:54:02,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 21:54:02,487 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)] === [2023-11-06 21:54:02,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:02,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1863865578, now seen corresponding path program 1 times [2023-11-06 21:54:02,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:02,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867446448] [2023-11-06 21:54:02,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:02,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:54:02,508 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 21:54:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:54:02,538 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 21:54:02,538 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 21:54:02,538 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-06 21:54:02,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-06 21:54:02,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-06 21:54:02,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-06 21:54:02,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-06 21:54:02,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-06 21:54:02,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-06 21:54:02,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 21:54:02,540 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-06 21:54:02,541 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 21:54:02,541 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 21:54:02,577 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 21:54:02,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 180 transitions, 387 flow [2023-11-06 21:54:02,689 INFO L124 PetriNetUnfolderBase]: 62/449 cut-off events. [2023-11-06 21:54:02,689 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 21:54:02,692 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. [2023-11-06 21:54:02,692 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 180 transitions, 387 flow [2023-11-06 21:54:02,697 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 180 transitions, 387 flow [2023-11-06 21:54:02,697 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:54:02,697 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 180 transitions, 387 flow [2023-11-06 21:54:02,698 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 180 transitions, 387 flow [2023-11-06 21:54:02,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 180 transitions, 387 flow [2023-11-06 21:54:02,761 INFO L124 PetriNetUnfolderBase]: 62/449 cut-off events. [2023-11-06 21:54:02,761 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 21:54:02,764 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. [2023-11-06 21:54:02,784 INFO L119 LiptonReduction]: Number of co-enabled transitions 15960 [2023-11-06 21:54:06,015 INFO L134 LiptonReduction]: Checked pairs total: 37840 [2023-11-06 21:54:06,015 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-11-06 21:54:06,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:54:06,017 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;@69084a63, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:54:06,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 21:54:06,019 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:54:06,019 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-06 21:54:06,020 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:54:06,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:06,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 21:54:06,020 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)] === [2023-11-06 21:54:06,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:06,020 INFO L85 PathProgramCache]: Analyzing trace with hash 35541, now seen corresponding path program 1 times [2023-11-06 21:54:06,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:06,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547262128] [2023-11-06 21:54:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:06,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:06,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:06,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547262128] [2023-11-06 21:54:06,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547262128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:06,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:06,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:54:06,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989859076] [2023-11-06 21:54:06,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:06,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:06,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:06,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:06,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:06,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 312 [2023-11-06 21:54:06,088 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) [2023-11-06 21:54:06,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:06,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 312 [2023-11-06 21:54:06,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:11,088 INFO L124 PetriNetUnfolderBase]: 26456/39784 cut-off events. [2023-11-06 21:54:11,089 INFO L125 PetriNetUnfolderBase]: For 889/889 co-relation queries the response was YES. [2023-11-06 21:54:11,166 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. [2023-11-06 21:54:11,385 INFO L140 encePairwiseOnDemand]: 286/312 looper letters, 64 selfloop transitions, 2 changer transitions 1/81 dead transitions. [2023-11-06 21:54:11,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 81 transitions, 323 flow [2023-11-06 21:54:11,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:11,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:54:11,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2023-11-06 21:54:11,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608974358974359 [2023-11-06 21:54:11,388 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2023-11-06 21:54:11,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2023-11-06 21:54:11,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:11,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2023-11-06 21:54:11,391 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) [2023-11-06 21:54:11,393 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) [2023-11-06 21:54:11,394 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) [2023-11-06 21:54:11,394 INFO L175 Difference]: Start difference. First operand has 64 places, 82 transitions, 191 flow. Second operand 3 states and 525 transitions. [2023-11-06 21:54:11,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 81 transitions, 323 flow [2023-11-06 21:54:11,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 323 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 21:54:11,402 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 147 flow [2023-11-06 21:54:11,403 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} [2023-11-06 21:54:11,404 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places. [2023-11-06 21:54:11,404 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 147 flow [2023-11-06 21:54:11,405 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) [2023-11-06 21:54:11,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:11,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 21:54:11,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 21:54:11,405 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)] === [2023-11-06 21:54:11,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:11,407 INFO L85 PathProgramCache]: Analyzing trace with hash 35542, now seen corresponding path program 1 times [2023-11-06 21:54:11,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:11,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788109687] [2023-11-06 21:54:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:11,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:11,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:11,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788109687] [2023-11-06 21:54:11,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788109687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:11,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:11,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:54:11,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558713377] [2023-11-06 21:54:11,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:11,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:11,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:11,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:11,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:11,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 312 [2023-11-06 21:54:11,517 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) [2023-11-06 21:54:11,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:11,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 312 [2023-11-06 21:54:11,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:14,888 INFO L124 PetriNetUnfolderBase]: 24574/36637 cut-off events. [2023-11-06 21:54:14,889 INFO L125 PetriNetUnfolderBase]: For 1480/1480 co-relation queries the response was YES. [2023-11-06 21:54:14,943 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. [2023-11-06 21:54:15,252 INFO L140 encePairwiseOnDemand]: 308/312 looper letters, 52 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-11-06 21:54:15,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 68 transitions, 275 flow [2023-11-06 21:54:15,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:15,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:54:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2023-11-06 21:54:15,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117521367521367 [2023-11-06 21:54:15,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2023-11-06 21:54:15,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2023-11-06 21:54:15,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:15,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2023-11-06 21:54:15,258 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) [2023-11-06 21:54:15,261 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) [2023-11-06 21:54:15,262 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) [2023-11-06 21:54:15,262 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 147 flow. Second operand 3 states and 479 transitions. [2023-11-06 21:54:15,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 68 transitions, 275 flow [2023-11-06 21:54:15,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 68 transitions, 271 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:54:15,339 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 157 flow [2023-11-06 21:54:15,339 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} [2023-11-06 21:54:15,342 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places. [2023-11-06 21:54:15,342 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 157 flow [2023-11-06 21:54:15,343 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) [2023-11-06 21:54:15,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:15,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 21:54:15,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 21:54:15,343 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)] === [2023-11-06 21:54:15,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:15,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1508802659, now seen corresponding path program 1 times [2023-11-06 21:54:15,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:15,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557343744] [2023-11-06 21:54:15,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:15,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:15,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:15,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557343744] [2023-11-06 21:54:15,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557343744] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:15,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459973343] [2023-11-06 21:54:15,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:15,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:15,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:15,461 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:15,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:54:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:15,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:54:15,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:15,571 INFO L351 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 [2023-11-06 21:54:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:15,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:15,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459973343] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:15,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:15,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-06 21:54:15,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670877244] [2023-11-06 21:54:15,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:15,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:54:15,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:15,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:54:15,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:54:15,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 312 [2023-11-06 21:54:15,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 157 flow. Second operand has 7 states, 7 states have (on average 139.71428571428572) internal successors, (978), 7 states have internal predecessors, (978), 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) [2023-11-06 21:54:15,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:15,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 312 [2023-11-06 21:54:15,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:18,904 INFO L124 PetriNetUnfolderBase]: 22862/33209 cut-off events. [2023-11-06 21:54:18,904 INFO L125 PetriNetUnfolderBase]: For 3132/3132 co-relation queries the response was YES. [2023-11-06 21:54:18,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67300 conditions, 33209 events. 22862/33209 cut-off events. For 3132/3132 co-relation queries the response was YES. Maximal size of possible extension queue 966. Compared 231328 event pairs, 582 based on Foata normal form. 9/30284 useless extension candidates. Maximal degree in co-relation 59789. Up to 25812 conditions per place. [2023-11-06 21:54:19,150 INFO L140 encePairwiseOnDemand]: 308/312 looper letters, 111 selfloop transitions, 6 changer transitions 0/131 dead transitions. [2023-11-06 21:54:19,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 131 transitions, 537 flow [2023-11-06 21:54:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:54:19,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:54:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 949 transitions. [2023-11-06 21:54:19,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2023-11-06 21:54:19,158 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 949 transitions. [2023-11-06 21:54:19,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 949 transitions. [2023-11-06 21:54:19,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:19,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 949 transitions. [2023-11-06 21:54:19,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.16666666666666) internal successors, (949), 6 states have internal predecessors, (949), 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) [2023-11-06 21:54:19,170 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) [2023-11-06 21:54:19,172 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) [2023-11-06 21:54:19,172 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 157 flow. Second operand 6 states and 949 transitions. [2023-11-06 21:54:19,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 131 transitions, 537 flow [2023-11-06 21:54:19,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 131 transitions, 535 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:54:19,185 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 171 flow [2023-11-06 21:54:19,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=171, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-11-06 21:54:19,187 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 3 predicate places. [2023-11-06 21:54:19,187 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 171 flow [2023-11-06 21:54:19,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 139.71428571428572) internal successors, (978), 7 states have internal predecessors, (978), 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) [2023-11-06 21:54:19,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:19,188 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:19,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:19,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ee9d95-a7d4-4cac-8d1e-ed7d2360b449/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 21:54:19,394 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 21:54:19,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:19,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1980737302, now seen corresponding path program 1 times [2023-11-06 21:54:19,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:19,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112852734] [2023-11-06 21:54:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:19,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:54:19,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:19,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112852734] [2023-11-06 21:54:19,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112852734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:19,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:19,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:54:19,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137524584] [2023-11-06 21:54:19,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:19,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:19,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:19,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:19,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:19,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 312 [2023-11-06 21:54:19,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 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) [2023-11-06 21:54:19,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:19,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 312 [2023-11-06 21:54:19,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:25,707 INFO L124 PetriNetUnfolderBase]: 42002/61592 cut-off events. [2023-11-06 21:54:25,707 INFO L125 PetriNetUnfolderBase]: For 6268/6268 co-relation queries the response was YES. [2023-11-06 21:54:25,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125079 conditions, 61592 events. 42002/61592 cut-off events. For 6268/6268 co-relation queries the response was YES. Maximal size of possible extension queue 1580. Compared 437197 event pairs, 14953 based on Foata normal form. 0/56035 useless extension candidates. Maximal degree in co-relation 69941. Up to 41954 conditions per place. [2023-11-06 21:54:26,032 INFO L140 encePairwiseOnDemand]: 303/312 looper letters, 85 selfloop transitions, 8 changer transitions 0/105 dead transitions. [2023-11-06 21:54:26,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 105 transitions, 488 flow [2023-11-06 21:54:26,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:26,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:54:26,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-11-06 21:54:26,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5459401709401709 [2023-11-06 21:54:26,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-11-06 21:54:26,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-11-06 21:54:26,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:26,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-11-06 21:54:26,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 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) [2023-11-06 21:54:26,044 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) [2023-11-06 21:54:26,045 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) [2023-11-06 21:54:26,045 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 171 flow. Second operand 3 states and 511 transitions. [2023-11-06 21:54:26,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 105 transitions, 488 flow [2023-11-06 21:54:26,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 105 transitions, 461 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-11-06 21:54:26,055 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 218 flow [2023-11-06 21:54:26,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2023-11-06 21:54:26,058 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 4 predicate places. [2023-11-06 21:54:26,058 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 218 flow [2023-11-06 21:54:26,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 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) [2023-11-06 21:54:26,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:26,059 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-06 21:54:26,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 21:54:26,059 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 21:54:26,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:26,060 INFO L85 PathProgramCache]: Analyzing trace with hash 391348266, now seen corresponding path program 1 times [2023-11-06 21:54:26,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:26,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510036513] [2023-11-06 21:54:26,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:26,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:54:26,090 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 21:54:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:54:26,122 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 21:54:26,124 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 21:54:26,125 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-06 21:54:26,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-06 21:54:26,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-06 21:54:26,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-06 21:54:26,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-06 21:54:26,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-06 21:54:26,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-06 21:54:26,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 21:54:26,127 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-06 21:54:26,128 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 21:54:26,128 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-06 21:54:26,169 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 21:54:26,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 210 transitions, 460 flow [2023-11-06 21:54:26,273 INFO L124 PetriNetUnfolderBase]: 96/701 cut-off events. [2023-11-06 21:54:26,274 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-06 21:54:26,279 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. [2023-11-06 21:54:26,279 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 210 transitions, 460 flow [2023-11-06 21:54:26,285 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 210 transitions, 460 flow [2023-11-06 21:54:26,286 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:54:26,286 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 210 transitions, 460 flow [2023-11-06 21:54:26,286 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 210 transitions, 460 flow [2023-11-06 21:54:26,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 210 transitions, 460 flow [2023-11-06 21:54:26,382 INFO L124 PetriNetUnfolderBase]: 96/701 cut-off events. [2023-11-06 21:54:26,383 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-06 21:54:26,388 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. [2023-11-06 21:54:26,416 INFO L119 LiptonReduction]: Number of co-enabled transitions 24752 [2023-11-06 21:54:29,900 INFO L134 LiptonReduction]: Checked pairs total: 64724 [2023-11-06 21:54:29,900 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-11-06 21:54:29,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:54:29,903 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;@69084a63, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:54:29,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 21:54:29,904 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:54:29,905 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-11-06 21:54:29,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:54:29,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:29,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 21:54:29,905 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)] === [2023-11-06 21:54:29,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:29,906 INFO L85 PathProgramCache]: Analyzing trace with hash 47957, now seen corresponding path program 1 times [2023-11-06 21:54:29,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:29,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045515188] [2023-11-06 21:54:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:29,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:29,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:29,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045515188] [2023-11-06 21:54:29,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045515188] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:29,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:29,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:54:29,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632215623] [2023-11-06 21:54:29,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:29,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:29,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:29,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:29,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:29,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 358 [2023-11-06 21:54:29,979 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) [2023-11-06 21:54:29,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:29,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 358 [2023-11-06 21:54:29,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand