./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-lit/sssc12.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_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/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_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-lit/sssc12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/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_c8306a87-455b-4b58-b04b-68ed01103ccf/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 f04269da33313e0538e960083eba1e7b90d9e89847d2a89d06392d6991a3ed98 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:12:53,684 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:12:53,806 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:12:53,817 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:12:53,817 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:12:53,857 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:12:53,858 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:12:53,859 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:12:53,860 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:12:53,865 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:12:53,866 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:12:53,867 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:12:53,867 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:12:53,869 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:12:53,869 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:12:53,870 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:12:53,870 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:12:53,871 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:12:53,871 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:12:53,871 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:12:53,872 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:12:53,872 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:12:53,873 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:12:53,873 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:12:53,874 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:12:53,874 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:12:53,875 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:12:53,875 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:12:53,876 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:12:53,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:12:53,877 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:12:53,878 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:12:53,878 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:12:53,878 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:12:53,878 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:12:53,878 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:12:53,879 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:12:53,879 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:12:53,879 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_c8306a87-455b-4b58-b04b-68ed01103ccf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f04269da33313e0538e960083eba1e7b90d9e89847d2a89d06392d6991a3ed98 [2023-11-06 22:12:54,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:12:54,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:12:54,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:12:54,202 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:12:54,202 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:12:54,204 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-lit/sssc12.i [2023-11-06 22:12:57,325 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:12:57,646 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:12:57,647 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/sv-benchmarks/c/pthread-lit/sssc12.i [2023-11-06 22:12:57,667 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP/data/ebde05534/b3ae496d1ca04ed1b3f63d91d241dbfa/FLAG4553dee57 [2023-11-06 22:12:57,683 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP/data/ebde05534/b3ae496d1ca04ed1b3f63d91d241dbfa [2023-11-06 22:12:57,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:12:57,688 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:12:57,689 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:12:57,690 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:12:57,695 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:12:57,696 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:12:57" (1/1) ... [2023-11-06 22:12:57,698 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ca19104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:57, skipping insertion in model container [2023-11-06 22:12:57,698 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:12:57" (1/1) ... [2023-11-06 22:12:57,758 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:12:58,343 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:12:58,355 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:12:58,435 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:12:58,555 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:12:58,555 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:12:58,563 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:12:58,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:58 WrapperNode [2023-11-06 22:12:58,563 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:12:58,564 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:12:58,565 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:12:58,565 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:12:58,598 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:58" (1/1) ... [2023-11-06 22:12:58,627 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:58" (1/1) ... [2023-11-06 22:12:58,665 INFO L138 Inliner]: procedures = 275, calls = 24, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 85 [2023-11-06 22:12:58,665 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:12:58,666 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:12:58,666 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:12:58,667 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:12:58,676 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:58" (1/1) ... [2023-11-06 22:12:58,676 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:58" (1/1) ... [2023-11-06 22:12:58,679 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:58" (1/1) ... [2023-11-06 22:12:58,679 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:58" (1/1) ... [2023-11-06 22:12:58,692 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:58" (1/1) ... [2023-11-06 22:12:58,695 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:58" (1/1) ... [2023-11-06 22:12:58,697 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:58" (1/1) ... [2023-11-06 22:12:58,698 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:58" (1/1) ... [2023-11-06 22:12:58,702 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:12:58,703 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:12:58,703 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:12:58,703 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:12:58,704 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:58" (1/1) ... [2023-11-06 22:12:58,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:12:58,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:58,750 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:12:58,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:12:58,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:12:58,793 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2023-11-06 22:12:58,793 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2023-11-06 22:12:58,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:12:58,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:12:58,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:12:58,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:12:58,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:12:58,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:12:58,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:12:58,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:12:58,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:12:58,797 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 22:12:58,942 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:12:58,943 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:12:59,168 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:12:59,236 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:12:59,237 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:12:59,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:12:59 BoogieIcfgContainer [2023-11-06 22:12:59,239 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:12:59,242 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:12:59,242 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:12:59,249 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:12:59,249 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:12:57" (1/3) ... [2023-11-06 22:12:59,250 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d5389c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:12:59, skipping insertion in model container [2023-11-06 22:12:59,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:12:58" (2/3) ... [2023-11-06 22:12:59,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d5389c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:12:59, skipping insertion in model container [2023-11-06 22:12:59,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:12:59" (3/3) ... [2023-11-06 22:12:59,255 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12.i [2023-11-06 22:12:59,275 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:12:59,276 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-06 22:12:59,277 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:12:59,337 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:12:59,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 91 transitions, 186 flow [2023-11-06 22:12:59,429 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-06 22:12:59,430 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:59,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 108 events. 8/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 150 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-11-06 22:12:59,436 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 91 transitions, 186 flow [2023-11-06 22:12:59,442 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 91 transitions, 186 flow [2023-11-06 22:12:59,445 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:12:59,456 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 91 transitions, 186 flow [2023-11-06 22:12:59,459 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 91 transitions, 186 flow [2023-11-06 22:12:59,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 91 transitions, 186 flow [2023-11-06 22:12:59,495 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-06 22:12:59,502 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:59,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 108 events. 8/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 150 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-11-06 22:12:59,506 INFO L119 LiptonReduction]: Number of co-enabled transitions 1560 [2023-11-06 22:13:03,413 INFO L134 LiptonReduction]: Checked pairs total: 1590 [2023-11-06 22:13:03,413 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-11-06 22:13:03,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:13:03,436 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;@45d83d6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:13:03,436 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-06 22:13:03,438 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:13:03,439 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 22:13:03,439 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:13:03,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:03,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:13:03,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-06 22:13:03,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:03,446 INFO L85 PathProgramCache]: Analyzing trace with hash 13757, now seen corresponding path program 1 times [2023-11-06 22:13:03,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:03,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301609991] [2023-11-06 22:13:03,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:03,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:03,914 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 22:13:03,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:03,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301609991] [2023-11-06 22:13:03,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301609991] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:03,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:03,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:13:03,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533878497] [2023-11-06 22:13:03,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:03,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:03,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:03,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:03,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:04,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 192 [2023-11-06 22:13:04,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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 22:13:04,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:04,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 192 [2023-11-06 22:13:04,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:04,056 INFO L124 PetriNetUnfolderBase]: 19/47 cut-off events. [2023-11-06 22:13:04,056 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:13:04,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 47 events. 19/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 123 event pairs, 15 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 84. Up to 46 conditions per place. [2023-11-06 22:13:04,058 INFO L140 encePairwiseOnDemand]: 188/192 looper letters, 10 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2023-11-06 22:13:04,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 12 transitions, 50 flow [2023-11-06 22:13:04,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:04,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:04,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-11-06 22:13:04,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4149305555555556 [2023-11-06 22:13:04,075 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-11-06 22:13:04,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-11-06 22:13:04,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:04,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-11-06 22:13:04,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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 22:13:04,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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 22:13:04,090 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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 22:13:04,092 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 34 flow. Second operand 3 states and 239 transitions. [2023-11-06 22:13:04,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 12 transitions, 50 flow [2023-11-06 22:13:04,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 12 transitions, 50 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:13:04,097 INFO L231 Difference]: Finished difference. Result has 16 places, 12 transitions, 30 flow [2023-11-06 22:13:04,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=30, PETRI_PLACES=16, PETRI_TRANSITIONS=12} [2023-11-06 22:13:04,103 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, -1 predicate places. [2023-11-06 22:13:04,103 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 12 transitions, 30 flow [2023-11-06 22:13:04,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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 22:13:04,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:04,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:13:04,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:13:04,104 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-06 22:13:04,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:04,105 INFO L85 PathProgramCache]: Analyzing trace with hash 13755, now seen corresponding path program 1 times [2023-11-06 22:13:04,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:04,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201196902] [2023-11-06 22:13:04,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:04,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:04,168 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 22:13:04,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:04,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201196902] [2023-11-06 22:13:04,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201196902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:04,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:04,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:13:04,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900993529] [2023-11-06 22:13:04,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:04,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:04,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:04,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:04,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:04,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 192 [2023-11-06 22:13:04,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 12 transitions, 30 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 22:13:04,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:04,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 192 [2023-11-06 22:13:04,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:04,262 INFO L124 PetriNetUnfolderBase]: 13/34 cut-off events. [2023-11-06 22:13:04,262 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:13:04,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 34 events. 13/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 77 event pairs, 10 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 67. Up to 33 conditions per place. [2023-11-06 22:13:04,264 INFO L140 encePairwiseOnDemand]: 190/192 looper letters, 9 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2023-11-06 22:13:04,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 11 transitions, 48 flow [2023-11-06 22:13:04,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:04,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-11-06 22:13:04,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045138888888889 [2023-11-06 22:13:04,272 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-11-06 22:13:04,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-11-06 22:13:04,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:04,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-11-06 22:13:04,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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 22:13:04,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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 22:13:04,280 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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 22:13:04,280 INFO L175 Difference]: Start difference. First operand has 16 places, 12 transitions, 30 flow. Second operand 3 states and 233 transitions. [2023-11-06 22:13:04,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 11 transitions, 48 flow [2023-11-06 22:13:04,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 11 transitions, 47 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:04,282 INFO L231 Difference]: Finished difference. Result has 16 places, 11 transitions, 29 flow [2023-11-06 22:13:04,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=27, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=29, PETRI_PLACES=16, PETRI_TRANSITIONS=11} [2023-11-06 22:13:04,286 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, -1 predicate places. [2023-11-06 22:13:04,287 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 11 transitions, 29 flow [2023-11-06 22:13:04,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 22:13:04,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:04,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:13:04,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:13:04,289 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-06 22:13:04,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:04,297 INFO L85 PathProgramCache]: Analyzing trace with hash 410106055, now seen corresponding path program 1 times [2023-11-06 22:13:04,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:04,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314755003] [2023-11-06 22:13:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:04,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:04,551 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 22:13:04,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:04,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314755003] [2023-11-06 22:13:04,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314755003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:04,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:04,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:13:04,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456494060] [2023-11-06 22:13:04,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:04,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:13:04,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:04,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:13:04,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:13:04,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 192 [2023-11-06 22:13:04,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 11 transitions, 29 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 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 22:13:04,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:04,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 192 [2023-11-06 22:13:04,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:04,673 INFO L124 PetriNetUnfolderBase]: 21/54 cut-off events. [2023-11-06 22:13:04,673 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:13:04,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 54 events. 21/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 153 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 107. Up to 29 conditions per place. [2023-11-06 22:13:04,674 INFO L140 encePairwiseOnDemand]: 188/192 looper letters, 15 selfloop transitions, 3 changer transitions 0/19 dead transitions. [2023-11-06 22:13:04,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 19 transitions, 81 flow [2023-11-06 22:13:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:13:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:13:04,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 307 transitions. [2023-11-06 22:13:04,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997395833333333 [2023-11-06 22:13:04,678 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 307 transitions. [2023-11-06 22:13:04,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 307 transitions. [2023-11-06 22:13:04,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:04,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 307 transitions. [2023-11-06 22:13:04,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 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 22:13:04,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 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 22:13:04,683 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 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 22:13:04,683 INFO L175 Difference]: Start difference. First operand has 16 places, 11 transitions, 29 flow. Second operand 4 states and 307 transitions. [2023-11-06 22:13:04,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 19 transitions, 81 flow [2023-11-06 22:13:04,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:04,685 INFO L231 Difference]: Finished difference. Result has 19 places, 12 transitions, 42 flow [2023-11-06 22:13:04,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=12} [2023-11-06 22:13:04,686 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 2 predicate places. [2023-11-06 22:13:04,686 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 12 transitions, 42 flow [2023-11-06 22:13:04,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 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 22:13:04,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:04,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:13:04,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:13:04,688 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-06 22:13:04,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:04,689 INFO L85 PathProgramCache]: Analyzing trace with hash 410106062, now seen corresponding path program 1 times [2023-11-06 22:13:04,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:04,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823394613] [2023-11-06 22:13:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:04,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:05,044 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 22:13:05,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:05,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823394613] [2023-11-06 22:13:05,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823394613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:05,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:05,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:13:05,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76873689] [2023-11-06 22:13:05,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:05,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:13:05,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:05,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:13:05,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:13:05,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 192 [2023-11-06 22:13:05,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 12 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 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 22:13:05,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:05,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 192 [2023-11-06 22:13:05,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:05,231 INFO L124 PetriNetUnfolderBase]: 19/49 cut-off events. [2023-11-06 22:13:05,231 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:13:05,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 49 events. 19/49 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 138 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 112. Up to 29 conditions per place. [2023-11-06 22:13:05,232 INFO L140 encePairwiseOnDemand]: 188/192 looper letters, 14 selfloop transitions, 3 changer transitions 0/18 dead transitions. [2023-11-06 22:13:05,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 18 transitions, 88 flow [2023-11-06 22:13:05,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:13:05,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:13:05,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 294 transitions. [2023-11-06 22:13:05,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3828125 [2023-11-06 22:13:05,235 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 294 transitions. [2023-11-06 22:13:05,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 294 transitions. [2023-11-06 22:13:05,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:05,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 294 transitions. [2023-11-06 22:13:05,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 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 22:13:05,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 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 22:13:05,240 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 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 22:13:05,240 INFO L175 Difference]: Start difference. First operand has 19 places, 12 transitions, 42 flow. Second operand 4 states and 294 transitions. [2023-11-06 22:13:05,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 18 transitions, 88 flow [2023-11-06 22:13:05,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 18 transitions, 84 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:13:05,242 INFO L231 Difference]: Finished difference. Result has 21 places, 12 transitions, 48 flow [2023-11-06 22:13:05,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=21, PETRI_TRANSITIONS=12} [2023-11-06 22:13:05,243 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 4 predicate places. [2023-11-06 22:13:05,243 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 12 transitions, 48 flow [2023-11-06 22:13:05,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 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 22:13:05,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:05,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:13:05,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:13:05,245 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-06 22:13:05,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:05,245 INFO L85 PathProgramCache]: Analyzing trace with hash 410106061, now seen corresponding path program 1 times [2023-11-06 22:13:05,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:05,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696519354] [2023-11-06 22:13:05,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:05,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:05,287 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 22:13:05,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:05,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696519354] [2023-11-06 22:13:05,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696519354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:05,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:05,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:13:05,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21334817] [2023-11-06 22:13:05,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:05,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:05,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:05,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:05,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:05,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 192 [2023-11-06 22:13:05,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 12 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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 22:13:05,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:05,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 192 [2023-11-06 22:13:05,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:05,341 INFO L124 PetriNetUnfolderBase]: 15/39 cut-off events. [2023-11-06 22:13:05,341 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-06 22:13:05,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 39 events. 15/39 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 86 event pairs, 12 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 101. Up to 38 conditions per place. [2023-11-06 22:13:05,342 INFO L140 encePairwiseOnDemand]: 190/192 looper letters, 9 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2023-11-06 22:13:05,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 11 transitions, 66 flow [2023-11-06 22:13:05,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:05,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2023-11-06 22:13:05,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131944444444444 [2023-11-06 22:13:05,345 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 238 transitions. [2023-11-06 22:13:05,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 238 transitions. [2023-11-06 22:13:05,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:05,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 238 transitions. [2023-11-06 22:13:05,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 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 22:13:05,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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 22:13:05,349 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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 22:13:05,349 INFO L175 Difference]: Start difference. First operand has 21 places, 12 transitions, 48 flow. Second operand 3 states and 238 transitions. [2023-11-06 22:13:05,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 11 transitions, 66 flow [2023-11-06 22:13:05,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 11 transitions, 60 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:13:05,350 INFO L231 Difference]: Finished difference. Result has 19 places, 11 transitions, 42 flow [2023-11-06 22:13:05,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=11} [2023-11-06 22:13:05,351 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 2 predicate places. [2023-11-06 22:13:05,351 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 11 transitions, 42 flow [2023-11-06 22:13:05,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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 22:13:05,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:05,352 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 22:13:05,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:13:05,353 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-06 22:13:05,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:05,353 INFO L85 PathProgramCache]: Analyzing trace with hash -171680038, now seen corresponding path program 1 times [2023-11-06 22:13:05,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:05,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176611899] [2023-11-06 22:13:05,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:05,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:13:05,366 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:13:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:13:05,392 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:13:05,393 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:13:05,394 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-06 22:13:05,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-11-06 22:13:05,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-11-06 22:13:05,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2023-11-06 22:13:05,397 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2023-11-06 22:13:05,397 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-11-06 22:13:05,397 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 10 remaining) [2023-11-06 22:13:05,397 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2023-11-06 22:13:05,398 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2023-11-06 22:13:05,398 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 10 remaining) [2023-11-06 22:13:05,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:13:05,398 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-06 22:13:05,401 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:13:05,401 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:13:05,427 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:13:05,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 131 transitions, 272 flow [2023-11-06 22:13:05,457 INFO L124 PetriNetUnfolderBase]: 14/167 cut-off events. [2023-11-06 22:13:05,457 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:13:05,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 167 events. 14/167 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 411 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 109. Up to 6 conditions per place. [2023-11-06 22:13:05,460 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 131 transitions, 272 flow [2023-11-06 22:13:05,462 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 131 transitions, 272 flow [2023-11-06 22:13:05,462 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:13:05,462 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 131 transitions, 272 flow [2023-11-06 22:13:05,463 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 131 transitions, 272 flow [2023-11-06 22:13:05,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 131 transitions, 272 flow [2023-11-06 22:13:05,498 INFO L124 PetriNetUnfolderBase]: 14/167 cut-off events. [2023-11-06 22:13:05,498 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:13:05,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 167 events. 14/167 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 411 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 109. Up to 6 conditions per place. [2023-11-06 22:13:05,505 INFO L119 LiptonReduction]: Number of co-enabled transitions 6240 [2023-11-06 22:13:09,349 INFO L134 LiptonReduction]: Checked pairs total: 11749 [2023-11-06 22:13:09,350 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-11-06 22:13:09,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:13:09,353 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;@45d83d6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:13:09,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-11-06 22:13:09,355 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:13:09,355 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-06 22:13:09,355 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:13:09,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:09,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:13:09,356 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-06 22:13:09,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:09,356 INFO L85 PathProgramCache]: Analyzing trace with hash 23594, now seen corresponding path program 1 times [2023-11-06 22:13:09,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:09,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122456148] [2023-11-06 22:13:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:09,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:09,398 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 22:13:09,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:09,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122456148] [2023-11-06 22:13:09,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122456148] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:09,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:09,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:13:09,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381917679] [2023-11-06 22:13:09,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:09,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:09,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:09,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:09,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:09,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 273 [2023-11-06 22:13:09,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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 22:13:09,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:09,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 273 [2023-11-06 22:13:09,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:09,565 INFO L124 PetriNetUnfolderBase]: 490/840 cut-off events. [2023-11-06 22:13:09,566 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-06 22:13:09,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1636 conditions, 840 events. 490/840 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 4554 event pairs, 376 based on Foata normal form. 0/451 useless extension candidates. Maximal degree in co-relation 782. Up to 763 conditions per place. [2023-11-06 22:13:09,575 INFO L140 encePairwiseOnDemand]: 269/273 looper letters, 24 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-11-06 22:13:09,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 124 flow [2023-11-06 22:13:09,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:09,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 349 transitions. [2023-11-06 22:13:09,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261294261294261 [2023-11-06 22:13:09,578 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 349 transitions. [2023-11-06 22:13:09,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 349 transitions. [2023-11-06 22:13:09,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:09,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 349 transitions. [2023-11-06 22:13:09,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 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 22:13:09,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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 22:13:09,585 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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 22:13:09,585 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 80 flow. Second operand 3 states and 349 transitions. [2023-11-06 22:13:09,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 124 flow [2023-11-06 22:13:09,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:13:09,588 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 76 flow [2023-11-06 22:13:09,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-11-06 22:13:09,590 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2023-11-06 22:13:09,590 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 76 flow [2023-11-06 22:13:09,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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 22:13:09,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:09,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:13:09,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:13:09,595 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-06 22:13:09,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:09,597 INFO L85 PathProgramCache]: Analyzing trace with hash 23593, now seen corresponding path program 1 times [2023-11-06 22:13:09,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:09,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197152170] [2023-11-06 22:13:09,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:09,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:09,665 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 22:13:09,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:09,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197152170] [2023-11-06 22:13:09,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197152170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:09,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:09,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:13:09,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110554013] [2023-11-06 22:13:09,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:09,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:09,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:09,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:09,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:09,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-11-06 22:13:09,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 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 22:13:09,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:09,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-11-06 22:13:09,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:09,798 INFO L124 PetriNetUnfolderBase]: 300/539 cut-off events. [2023-11-06 22:13:09,798 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-06 22:13:09,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 539 events. 300/539 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2624 event pairs, 224 based on Foata normal form. 0/336 useless extension candidates. Maximal degree in co-relation 1048. Up to 482 conditions per place. [2023-11-06 22:13:09,802 INFO L140 encePairwiseOnDemand]: 271/273 looper letters, 23 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-11-06 22:13:09,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 122 flow [2023-11-06 22:13:09,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:09,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 349 transitions. [2023-11-06 22:13:09,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261294261294261 [2023-11-06 22:13:09,805 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 349 transitions. [2023-11-06 22:13:09,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 349 transitions. [2023-11-06 22:13:09,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:09,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 349 transitions. [2023-11-06 22:13:09,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 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 22:13:09,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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 22:13:09,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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 22:13:09,810 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 76 flow. Second operand 3 states and 349 transitions. [2023-11-06 22:13:09,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 122 flow [2023-11-06 22:13:09,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 121 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:09,813 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 75 flow [2023-11-06 22:13:09,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-06 22:13:09,815 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2023-11-06 22:13:09,815 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 75 flow [2023-11-06 22:13:09,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 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 22:13:09,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:09,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:09,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:13:09,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-06 22:13:09,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:09,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1743309400, now seen corresponding path program 1 times [2023-11-06 22:13:09,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:09,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926012406] [2023-11-06 22:13:09,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:09,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:09,932 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 22:13:09,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:09,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926012406] [2023-11-06 22:13:09,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926012406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:09,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:09,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:13:09,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936155113] [2023-11-06 22:13:09,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:09,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:13:09,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:09,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:13:09,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:13:09,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-11-06 22:13:09,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 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 22:13:09,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:09,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-11-06 22:13:09,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:10,133 INFO L124 PetriNetUnfolderBase]: 486/836 cut-off events. [2023-11-06 22:13:10,134 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-06 22:13:10,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1678 conditions, 836 events. 486/836 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4831 event pairs, 197 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 1669. Up to 431 conditions per place. [2023-11-06 22:13:10,141 INFO L140 encePairwiseOnDemand]: 268/273 looper letters, 38 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2023-11-06 22:13:10,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 48 transitions, 198 flow [2023-11-06 22:13:10,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:13:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:13:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2023-11-06 22:13:10,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434981684981685 [2023-11-06 22:13:10,144 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2023-11-06 22:13:10,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2023-11-06 22:13:10,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:10,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2023-11-06 22:13:10,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 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 22:13:10,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 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 22:13:10,153 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 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 22:13:10,153 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 75 flow. Second operand 4 states and 475 transitions. [2023-11-06 22:13:10,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 48 transitions, 198 flow [2023-11-06 22:13:10,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 48 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:10,156 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 91 flow [2023-11-06 22:13:10,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-11-06 22:13:10,159 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-11-06 22:13:10,159 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 91 flow [2023-11-06 22:13:10,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 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 22:13:10,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:10,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:10,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:13:10,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-06 22:13:10,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:10,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1743309420, now seen corresponding path program 1 times [2023-11-06 22:13:10,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:10,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098517677] [2023-11-06 22:13:10,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:10,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:10,220 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 22:13:10,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:10,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098517677] [2023-11-06 22:13:10,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098517677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:10,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:10,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:13:10,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771004401] [2023-11-06 22:13:10,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:10,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:10,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:10,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:10,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:10,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-11-06 22:13:10,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 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 22:13:10,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:10,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-11-06 22:13:10,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:10,422 INFO L124 PetriNetUnfolderBase]: 435/741 cut-off events. [2023-11-06 22:13:10,422 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-06 22:13:10,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1611 conditions, 741 events. 435/741 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3934 event pairs, 224 based on Foata normal form. 20/519 useless extension candidates. Maximal degree in co-relation 1600. Up to 463 conditions per place. [2023-11-06 22:13:10,429 INFO L140 encePairwiseOnDemand]: 268/273 looper letters, 38 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-11-06 22:13:10,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 199 flow [2023-11-06 22:13:10,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:10,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-11-06 22:13:10,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481074481074481 [2023-11-06 22:13:10,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-11-06 22:13:10,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-11-06 22:13:10,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:10,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-11-06 22:13:10,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 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 22:13:10,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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 22:13:10,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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 22:13:10,436 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 91 flow. Second operand 3 states and 367 transitions. [2023-11-06 22:13:10,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 199 flow [2023-11-06 22:13:10,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 193 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:13:10,441 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 90 flow [2023-11-06 22:13:10,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=35, 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=90, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-11-06 22:13:10,442 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-11-06 22:13:10,442 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 90 flow [2023-11-06 22:13:10,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 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 22:13:10,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:10,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:10,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:13:10,443 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-06 22:13:10,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:10,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1441648002, now seen corresponding path program 1 times [2023-11-06 22:13:10,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:10,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395784716] [2023-11-06 22:13:10,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:10,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:10,718 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 22:13:10,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:10,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395784716] [2023-11-06 22:13:10,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395784716] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:10,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:10,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:13:10,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509371558] [2023-11-06 22:13:10,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:10,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:13:10,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:10,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:13:10,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:13:11,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 273 [2023-11-06 22:13:11,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 90 flow. Second operand has 6 states, 6 states have (on average 96.66666666666667) internal successors, (580), 6 states have internal predecessors, (580), 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 22:13:11,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:11,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 273 [2023-11-06 22:13:11,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:11,440 INFO L124 PetriNetUnfolderBase]: 774/1348 cut-off events. [2023-11-06 22:13:11,440 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2023-11-06 22:13:11,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2992 conditions, 1348 events. 774/1348 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8211 event pairs, 146 based on Foata normal form. 0/970 useless extension candidates. Maximal degree in co-relation 2981. Up to 540 conditions per place. [2023-11-06 22:13:11,452 INFO L140 encePairwiseOnDemand]: 263/273 looper letters, 85 selfloop transitions, 10 changer transitions 0/101 dead transitions. [2023-11-06 22:13:11,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 101 transitions, 466 flow [2023-11-06 22:13:11,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:13:11,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:13:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 669 transitions. [2023-11-06 22:13:11,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4084249084249084 [2023-11-06 22:13:11,456 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 669 transitions. [2023-11-06 22:13:11,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 669 transitions. [2023-11-06 22:13:11,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:11,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 669 transitions. [2023-11-06 22:13:11,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 111.5) internal successors, (669), 6 states have internal predecessors, (669), 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 22:13:11,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 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 22:13:11,463 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 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 22:13:11,463 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 90 flow. Second operand 6 states and 669 transitions. [2023-11-06 22:13:11,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 101 transitions, 466 flow [2023-11-06 22:13:11,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 101 transitions, 452 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:13:11,467 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 174 flow [2023-11-06 22:13:11,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=174, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-11-06 22:13:11,469 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2023-11-06 22:13:11,469 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 174 flow [2023-11-06 22:13:11,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 96.66666666666667) internal successors, (580), 6 states have internal predecessors, (580), 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 22:13:11,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:11,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:11,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:13:11,470 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-06 22:13:11,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:11,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1441648001, now seen corresponding path program 1 times [2023-11-06 22:13:11,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:11,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794617390] [2023-11-06 22:13:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:11,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:11,516 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 22:13:11,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:11,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794617390] [2023-11-06 22:13:11,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794617390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:11,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:11,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:13:11,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008286385] [2023-11-06 22:13:11,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:11,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:11,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:11,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:11,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:11,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 273 [2023-11-06 22:13:11,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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 22:13:11,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:11,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 273 [2023-11-06 22:13:11,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:11,719 INFO L124 PetriNetUnfolderBase]: 591/1068 cut-off events. [2023-11-06 22:13:11,720 INFO L125 PetriNetUnfolderBase]: For 774/813 co-relation queries the response was YES. [2023-11-06 22:13:11,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2705 conditions, 1068 events. 591/1068 cut-off events. For 774/813 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6248 event pairs, 457 based on Foata normal form. 55/988 useless extension candidates. Maximal degree in co-relation 2689. Up to 971 conditions per place. [2023-11-06 22:13:11,730 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 28 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-11-06 22:13:11,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 226 flow [2023-11-06 22:13:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:11,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-11-06 22:13:11,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42124542124542125 [2023-11-06 22:13:11,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-11-06 22:13:11,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-11-06 22:13:11,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:11,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-11-06 22:13:11,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 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 22:13:11,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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 22:13:11,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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 22:13:11,737 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 174 flow. Second operand 3 states and 345 transitions. [2023-11-06 22:13:11,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 226 flow [2023-11-06 22:13:11,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 38 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:11,743 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 166 flow [2023-11-06 22:13:11,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-11-06 22:13:11,744 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2023-11-06 22:13:11,744 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 166 flow [2023-11-06 22:13:11,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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 22:13:11,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:11,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:11,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 22:13:11,747 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thrErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-06 22:13:11,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:11,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1441648022, now seen corresponding path program 1 times [2023-11-06 22:13:11,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:11,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091380968] [2023-11-06 22:13:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:11,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:11,871 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 22:13:11,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:11,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091380968] [2023-11-06 22:13:11,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091380968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:11,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:11,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:13:11,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658298137] [2023-11-06 22:13:11,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:11,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:13:11,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:11,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:13:11,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:13:11,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-11-06 22:13:11,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 106.25) internal successors, (425), 4 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 22:13:11,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:11,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-11-06 22:13:11,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:12,187 INFO L124 PetriNetUnfolderBase]: 672/1161 cut-off events. [2023-11-06 22:13:12,187 INFO L125 PetriNetUnfolderBase]: For 706/722 co-relation queries the response was YES. [2023-11-06 22:13:12,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3040 conditions, 1161 events. 672/1161 cut-off events. For 706/722 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 6954 event pairs, 72 based on Foata normal form. 30/1051 useless extension candidates. Maximal degree in co-relation 3023. Up to 425 conditions per place. [2023-11-06 22:13:12,198 INFO L140 encePairwiseOnDemand]: 266/273 looper letters, 64 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2023-11-06 22:13:12,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 80 transitions, 455 flow [2023-11-06 22:13:12,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:12,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:13:12,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 589 transitions. [2023-11-06 22:13:12,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315018315018315 [2023-11-06 22:13:12,202 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 589 transitions. [2023-11-06 22:13:12,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 589 transitions. [2023-11-06 22:13:12,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:12,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 589 transitions. [2023-11-06 22:13:12,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 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 22:13:12,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 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 22:13:12,210 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 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 22:13:12,210 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 166 flow. Second operand 5 states and 589 transitions. [2023-11-06 22:13:12,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 80 transitions, 455 flow [2023-11-06 22:13:12,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 80 transitions, 454 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:12,217 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 219 flow [2023-11-06 22:13:12,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=219, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2023-11-06 22:13:12,218 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 13 predicate places. [2023-11-06 22:13:12,218 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 219 flow [2023-11-06 22:13:12,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.25) internal successors, (425), 4 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 22:13:12,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:12,218 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 22:13:12,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 22:13:12,219 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-06 22:13:12,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:12,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1229485326, now seen corresponding path program 1 times [2023-11-06 22:13:12,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:12,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717863950] [2023-11-06 22:13:12,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:12,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:13:12,234 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:13:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:13:12,251 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:13:12,251 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:13:12,252 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2023-11-06 22:13:12,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2023-11-06 22:13:12,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2023-11-06 22:13:12,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2023-11-06 22:13:12,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (8 of 13 remaining) [2023-11-06 22:13:12,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-11-06 22:13:12,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2023-11-06 22:13:12,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (5 of 13 remaining) [2023-11-06 22:13:12,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2023-11-06 22:13:12,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining) [2023-11-06 22:13:12,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 13 remaining) [2023-11-06 22:13:12,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2023-11-06 22:13:12,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 13 remaining) [2023-11-06 22:13:12,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:13:12,254 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:12,255 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:13:12,255 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:13:12,289 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:13:12,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 171 transitions, 360 flow [2023-11-06 22:13:12,326 INFO L124 PetriNetUnfolderBase]: 20/226 cut-off events. [2023-11-06 22:13:12,327 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:13:12,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 226 events. 20/226 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 657 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-11-06 22:13:12,328 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 171 transitions, 360 flow [2023-11-06 22:13:12,331 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 171 transitions, 360 flow [2023-11-06 22:13:12,332 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:13:12,332 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 171 transitions, 360 flow [2023-11-06 22:13:12,332 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 171 transitions, 360 flow [2023-11-06 22:13:12,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 171 transitions, 360 flow [2023-11-06 22:13:12,370 INFO L124 PetriNetUnfolderBase]: 20/226 cut-off events. [2023-11-06 22:13:12,371 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:13:12,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 226 events. 20/226 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 657 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-11-06 22:13:12,383 INFO L119 LiptonReduction]: Number of co-enabled transitions 14040 [2023-11-06 22:13:17,434 INFO L134 LiptonReduction]: Checked pairs total: 27219 [2023-11-06 22:13:17,434 INFO L136 LiptonReduction]: Total number of compositions: 186 [2023-11-06 22:13:17,436 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:13:17,437 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;@45d83d6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:13:17,437 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-11-06 22:13:17,438 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:13:17,439 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-06 22:13:17,439 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:13:17,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:17,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:13:17,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:13:17,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:17,440 INFO L85 PathProgramCache]: Analyzing trace with hash 36443, now seen corresponding path program 1 times [2023-11-06 22:13:17,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:17,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891489575] [2023-11-06 22:13:17,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:17,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:17,487 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 22:13:17,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:17,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891489575] [2023-11-06 22:13:17,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891489575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:17,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:17,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:13:17,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562231534] [2023-11-06 22:13:17,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:17,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:17,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:17,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:17,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:17,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 357 [2023-11-06 22:13:17,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 116 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 22:13:17,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:17,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 357 [2023-11-06 22:13:17,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:18,926 INFO L124 PetriNetUnfolderBase]: 7834/11230 cut-off events. [2023-11-06 22:13:18,926 INFO L125 PetriNetUnfolderBase]: For 631/631 co-relation queries the response was YES. [2023-11-06 22:13:18,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22125 conditions, 11230 events. 7834/11230 cut-off events. For 631/631 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 68778 event pairs, 6154 based on Foata normal form. 0/6026 useless extension candidates. Maximal degree in co-relation 2362. Up to 10537 conditions per place. [2023-11-06 22:13:19,032 INFO L140 encePairwiseOnDemand]: 353/357 looper letters, 36 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-06 22:13:19,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 184 flow [2023-11-06 22:13:19,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:19,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-11-06 22:13:19,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4323062558356676 [2023-11-06 22:13:19,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-11-06 22:13:19,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-11-06 22:13:19,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:19,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-11-06 22:13:19,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 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 22:13:19,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 22:13:19,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 22:13:19,042 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 116 flow. Second operand 3 states and 463 transitions. [2023-11-06 22:13:19,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 184 flow [2023-11-06 22:13:19,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 182 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-06 22:13:19,046 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 110 flow [2023-11-06 22:13:19,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-11-06 22:13:19,047 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-11-06 22:13:19,047 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 110 flow [2023-11-06 22:13:19,048 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 22:13:19,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:19,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:13:19,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 22:13:19,048 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:13:19,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:19,049 INFO L85 PathProgramCache]: Analyzing trace with hash 36441, now seen corresponding path program 1 times [2023-11-06 22:13:19,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:19,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492905530] [2023-11-06 22:13:19,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:19,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:19,096 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 22:13:19,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:19,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492905530] [2023-11-06 22:13:19,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492905530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:19,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:19,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:13:19,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58470772] [2023-11-06 22:13:19,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:19,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:19,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:19,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:19,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:19,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 357 [2023-11-06 22:13:19,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 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 22:13:19,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:19,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 357 [2023-11-06 22:13:19,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:19,994 INFO L124 PetriNetUnfolderBase]: 4953/7266 cut-off events. [2023-11-06 22:13:19,994 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2023-11-06 22:13:20,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14300 conditions, 7266 events. 4953/7266 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 42081 event pairs, 3833 based on Foata normal form. 0/4363 useless extension candidates. Maximal degree in co-relation 14291. Up to 6755 conditions per place. [2023-11-06 22:13:20,046 INFO L140 encePairwiseOnDemand]: 355/357 looper letters, 35 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-06 22:13:20,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 45 transitions, 180 flow [2023-11-06 22:13:20,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:20,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-11-06 22:13:20,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42670401493930904 [2023-11-06 22:13:20,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-11-06 22:13:20,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-11-06 22:13:20,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:20,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-11-06 22:13:20,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 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 22:13:20,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 22:13:20,055 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 22:13:20,055 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 110 flow. Second operand 3 states and 457 transitions. [2023-11-06 22:13:20,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 45 transitions, 180 flow [2023-11-06 22:13:20,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 45 transitions, 179 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:20,058 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 109 flow [2023-11-06 22:13:20,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=107, 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=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-11-06 22:13:20,059 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-11-06 22:13:20,059 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 109 flow [2023-11-06 22:13:20,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 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 22:13:20,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:20,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:20,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 22:13:20,060 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:13:20,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:20,061 INFO L85 PathProgramCache]: Analyzing trace with hash 511404961, now seen corresponding path program 1 times [2023-11-06 22:13:20,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:20,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033805653] [2023-11-06 22:13:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:20,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:20,100 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 22:13:20,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:20,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033805653] [2023-11-06 22:13:20,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033805653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:20,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:20,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:13:20,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723926370] [2023-11-06 22:13:20,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:20,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:20,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:20,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:20,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:20,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 357 [2023-11-06 22:13:20,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 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 22:13:20,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:20,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 357 [2023-11-06 22:13:20,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:21,577 INFO L124 PetriNetUnfolderBase]: 7393/10676 cut-off events. [2023-11-06 22:13:21,577 INFO L125 PetriNetUnfolderBase]: For 549/549 co-relation queries the response was YES. [2023-11-06 22:13:21,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21301 conditions, 10676 events. 7393/10676 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 66135 event pairs, 3833 based on Foata normal form. 0/6712 useless extension candidates. Maximal degree in co-relation 21291. Up to 6556 conditions per place. [2023-11-06 22:13:21,651 INFO L140 encePairwiseOnDemand]: 351/357 looper letters, 62 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-11-06 22:13:21,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 71 transitions, 299 flow [2023-11-06 22:13:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:21,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:21,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2023-11-06 22:13:21,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584500466853408 [2023-11-06 22:13:21,654 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2023-11-06 22:13:21,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2023-11-06 22:13:21,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:21,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2023-11-06 22:13:21,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 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 22:13:21,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 22:13:21,660 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 22:13:21,660 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 109 flow. Second operand 3 states and 491 transitions. [2023-11-06 22:13:21,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 71 transitions, 299 flow [2023-11-06 22:13:21,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:21,665 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 122 flow [2023-11-06 22:13:21,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-11-06 22:13:21,667 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2023-11-06 22:13:21,667 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 122 flow [2023-11-06 22:13:21,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 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 22:13:21,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:21,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:21,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-06 22:13:21,668 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:13:21,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:21,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1727729294, now seen corresponding path program 1 times [2023-11-06 22:13:21,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:21,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600729542] [2023-11-06 22:13:21,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:21,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:21,884 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 22:13:21,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:21,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600729542] [2023-11-06 22:13:21,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600729542] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:21,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:21,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:13:21,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152689927] [2023-11-06 22:13:21,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:21,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:13:21,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:21,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:13:21,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:13:22,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 357 [2023-11-06 22:13:22,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 128.8) internal successors, (644), 5 states have internal predecessors, (644), 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 22:13:22,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:22,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 357 [2023-11-06 22:13:22,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:24,159 INFO L124 PetriNetUnfolderBase]: 9221/14217 cut-off events. [2023-11-06 22:13:24,160 INFO L125 PetriNetUnfolderBase]: For 1505/1505 co-relation queries the response was YES. [2023-11-06 22:13:24,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29470 conditions, 14217 events. 9221/14217 cut-off events. For 1505/1505 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 102300 event pairs, 3287 based on Foata normal form. 0/10268 useless extension candidates. Maximal degree in co-relation 29459. Up to 6551 conditions per place. [2023-11-06 22:13:24,281 INFO L140 encePairwiseOnDemand]: 342/357 looper letters, 102 selfloop transitions, 15 changer transitions 0/125 dead transitions. [2023-11-06 22:13:24,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 125 transitions, 568 flow [2023-11-06 22:13:24,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:13:24,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:13:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 896 transitions. [2023-11-06 22:13:24,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41830065359477125 [2023-11-06 22:13:24,287 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 896 transitions. [2023-11-06 22:13:24,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 896 transitions. [2023-11-06 22:13:24,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:24,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 896 transitions. [2023-11-06 22:13:24,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.33333333333334) internal successors, (896), 6 states have internal predecessors, (896), 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 22:13:24,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 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 22:13:24,298 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 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 22:13:24,298 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 122 flow. Second operand 6 states and 896 transitions. [2023-11-06 22:13:24,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 125 transitions, 568 flow [2023-11-06 22:13:24,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 125 transitions, 560 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:13:24,319 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 240 flow [2023-11-06 22:13:24,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-11-06 22:13:24,321 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2023-11-06 22:13:24,321 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 240 flow [2023-11-06 22:13:24,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.8) internal successors, (644), 5 states have internal predecessors, (644), 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 22:13:24,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:24,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:24,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-06 22:13:24,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:13:24,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:24,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1727729284, now seen corresponding path program 1 times [2023-11-06 22:13:24,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:24,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562379832] [2023-11-06 22:13:24,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:24,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:24,461 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 22:13:24,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:24,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562379832] [2023-11-06 22:13:24,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562379832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:24,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:24,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:13:24,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756105366] [2023-11-06 22:13:24,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:24,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:13:24,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:24,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:13:24,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:13:24,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 357 [2023-11-06 22:13:24,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 131.8) internal successors, (659), 5 states have internal predecessors, (659), 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 22:13:24,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:24,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 357 [2023-11-06 22:13:24,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:27,931 INFO L124 PetriNetUnfolderBase]: 19502/29094 cut-off events. [2023-11-06 22:13:27,931 INFO L125 PetriNetUnfolderBase]: For 19818/20156 co-relation queries the response was YES. [2023-11-06 22:13:28,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74231 conditions, 29094 events. 19502/29094 cut-off events. For 19818/20156 co-relation queries the response was YES. Maximal size of possible extension queue 2049. Compared 219147 event pairs, 3742 based on Foata normal form. 140/22713 useless extension candidates. Maximal degree in co-relation 74215. Up to 11726 conditions per place. [2023-11-06 22:13:28,194 INFO L140 encePairwiseOnDemand]: 343/357 looper letters, 174 selfloop transitions, 34 changer transitions 0/216 dead transitions. [2023-11-06 22:13:28,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 216 transitions, 1290 flow [2023-11-06 22:13:28,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:13:28,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:13:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1091 transitions. [2023-11-06 22:13:28,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365746298519408 [2023-11-06 22:13:28,202 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1091 transitions. [2023-11-06 22:13:28,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1091 transitions. [2023-11-06 22:13:28,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:28,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1091 transitions. [2023-11-06 22:13:28,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 155.85714285714286) internal successors, (1091), 7 states have internal predecessors, (1091), 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 22:13:28,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 357.0) internal successors, (2856), 8 states have internal predecessors, (2856), 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 22:13:28,213 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 357.0) internal successors, (2856), 8 states have internal predecessors, (2856), 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 22:13:28,213 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 240 flow. Second operand 7 states and 1091 transitions. [2023-11-06 22:13:28,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 216 transitions, 1290 flow [2023-11-06 22:13:28,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 216 transitions, 1289 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:28,236 INFO L231 Difference]: Finished difference. Result has 65 places, 89 transitions, 632 flow [2023-11-06 22:13:28,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=632, PETRI_PLACES=65, PETRI_TRANSITIONS=89} [2023-11-06 22:13:28,237 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2023-11-06 22:13:28,237 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 89 transitions, 632 flow [2023-11-06 22:13:28,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.8) internal successors, (659), 5 states have internal predecessors, (659), 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 22:13:28,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:28,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:28,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-06 22:13:28,238 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:13:28,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:28,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1727729293, now seen corresponding path program 1 times [2023-11-06 22:13:28,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:28,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545731193] [2023-11-06 22:13:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:28,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:28,282 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 22:13:28,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:28,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545731193] [2023-11-06 22:13:28,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545731193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:28,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:28,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:13:28,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218865336] [2023-11-06 22:13:28,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:28,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:28,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:28,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:28,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:28,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 357 [2023-11-06 22:13:28,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 89 transitions, 632 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 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 22:13:28,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:28,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 357 [2023-11-06 22:13:28,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:30,355 INFO L124 PetriNetUnfolderBase]: 12341/18733 cut-off events. [2023-11-06 22:13:30,356 INFO L125 PetriNetUnfolderBase]: For 40981/41941 co-relation queries the response was YES. [2023-11-06 22:13:30,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57356 conditions, 18733 events. 12341/18733 cut-off events. For 40981/41941 co-relation queries the response was YES. Maximal size of possible extension queue 1340. Compared 135226 event pairs, 8098 based on Foata normal form. 1178/16675 useless extension candidates. Maximal degree in co-relation 57334. Up to 17017 conditions per place. [2023-11-06 22:13:30,518 INFO L140 encePairwiseOnDemand]: 353/357 looper letters, 71 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-11-06 22:13:30,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 768 flow [2023-11-06 22:13:30,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:30,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2023-11-06 22:13:30,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173669467787115 [2023-11-06 22:13:30,521 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2023-11-06 22:13:30,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2023-11-06 22:13:30,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:30,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2023-11-06 22:13:30,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 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 22:13:30,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 22:13:30,526 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 22:13:30,526 INFO L175 Difference]: Start difference. First operand has 65 places, 89 transitions, 632 flow. Second operand 3 states and 447 transitions. [2023-11-06 22:13:30,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 768 flow [2023-11-06 22:13:30,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 86 transitions, 768 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:13:30,608 INFO L231 Difference]: Finished difference. Result has 64 places, 86 transitions, 626 flow [2023-11-06 22:13:30,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=626, PETRI_PLACES=64, PETRI_TRANSITIONS=86} [2023-11-06 22:13:30,609 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 14 predicate places. [2023-11-06 22:13:30,609 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 86 transitions, 626 flow [2023-11-06 22:13:30,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 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 22:13:30,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:30,610 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:30,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-06 22:13:30,610 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thrErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:13:30,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:30,610 INFO L85 PathProgramCache]: Analyzing trace with hash 464563011, now seen corresponding path program 1 times [2023-11-06 22:13:30,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:30,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373874968] [2023-11-06 22:13:30,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:30,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:13:30,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:30,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373874968] [2023-11-06 22:13:30,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373874968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:30,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:30,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:13:30,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135915821] [2023-11-06 22:13:30,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:30,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:30,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:30,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:30,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:30,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 357 [2023-11-06 22:13:30,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 86 transitions, 626 flow. Second operand has 3 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 22:13:30,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:30,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 357 [2023-11-06 22:13:30,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:33,864 INFO L124 PetriNetUnfolderBase]: 17520/25835 cut-off events. [2023-11-06 22:13:33,865 INFO L125 PetriNetUnfolderBase]: For 50267/51704 co-relation queries the response was YES. [2023-11-06 22:13:33,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77575 conditions, 25835 events. 17520/25835 cut-off events. For 50267/51704 co-relation queries the response was YES. Maximal size of possible extension queue 1823. Compared 189070 event pairs, 7792 based on Foata normal form. 707/22801 useless extension candidates. Maximal degree in co-relation 77551. Up to 15416 conditions per place. [2023-11-06 22:13:34,067 INFO L140 encePairwiseOnDemand]: 353/357 looper letters, 119 selfloop transitions, 2 changer transitions 0/133 dead transitions. [2023-11-06 22:13:34,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 133 transitions, 1213 flow [2023-11-06 22:13:34,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:34,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:34,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-11-06 22:13:34,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446311858076564 [2023-11-06 22:13:34,070 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-11-06 22:13:34,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-11-06 22:13:34,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:34,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-11-06 22:13:34,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 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 22:13:34,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 22:13:34,075 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 22:13:34,075 INFO L175 Difference]: Start difference. First operand has 64 places, 86 transitions, 626 flow. Second operand 3 states and 478 transitions. [2023-11-06 22:13:34,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 133 transitions, 1213 flow [2023-11-06 22:13:34,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 133 transitions, 1212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:34,150 INFO L231 Difference]: Finished difference. Result has 66 places, 86 transitions, 635 flow [2023-11-06 22:13:34,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=635, PETRI_PLACES=66, PETRI_TRANSITIONS=86} [2023-11-06 22:13:34,151 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2023-11-06 22:13:34,151 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 86 transitions, 635 flow [2023-11-06 22:13:34,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 22:13:34,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:34,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:34,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-06 22:13:34,152 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thrErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:13:34,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:34,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2020001686, now seen corresponding path program 1 times [2023-11-06 22:13:34,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:34,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783342016] [2023-11-06 22:13:34,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:34,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:34,254 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 22:13:34,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:34,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783342016] [2023-11-06 22:13:34,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783342016] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:34,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173559396] [2023-11-06 22:13:34,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:34,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:34,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:34,260 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:34,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:13:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:34,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:13:34,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:34,464 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 22:13:34,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:34,542 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 22:13:34,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173559396] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:34,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:34,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-06 22:13:34,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016240313] [2023-11-06 22:13:34,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:34,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:13:34,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:34,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:13:34,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:13:34,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 357 [2023-11-06 22:13:34,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 86 transitions, 635 flow. Second operand has 8 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 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 22:13:34,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:34,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 357 [2023-11-06 22:13:34,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:39,137 INFO L124 PetriNetUnfolderBase]: 20000/30528 cut-off events. [2023-11-06 22:13:39,137 INFO L125 PetriNetUnfolderBase]: For 59709/60439 co-relation queries the response was YES. [2023-11-06 22:13:39,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95136 conditions, 30528 events. 20000/30528 cut-off events. For 59709/60439 co-relation queries the response was YES. Maximal size of possible extension queue 1948. Compared 238913 event pairs, 5299 based on Foata normal form. 1394/28569 useless extension candidates. Maximal degree in co-relation 95111. Up to 9798 conditions per place. [2023-11-06 22:13:39,383 INFO L140 encePairwiseOnDemand]: 348/357 looper letters, 251 selfloop transitions, 75 changer transitions 0/334 dead transitions. [2023-11-06 22:13:39,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 334 transitions, 2543 flow [2023-11-06 22:13:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:13:39,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:13:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1961 transitions. [2023-11-06 22:13:39,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42253824606765783 [2023-11-06 22:13:39,392 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1961 transitions. [2023-11-06 22:13:39,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1961 transitions. [2023-11-06 22:13:39,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:39,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1961 transitions. [2023-11-06 22:13:39,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 150.84615384615384) internal successors, (1961), 13 states have internal predecessors, (1961), 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 22:13:39,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 357.0) internal successors, (4998), 14 states have internal predecessors, (4998), 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 22:13:39,410 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 357.0) internal successors, (4998), 14 states have internal predecessors, (4998), 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 22:13:39,411 INFO L175 Difference]: Start difference. First operand has 66 places, 86 transitions, 635 flow. Second operand 13 states and 1961 transitions. [2023-11-06 22:13:39,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 334 transitions, 2543 flow [2023-11-06 22:13:39,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 334 transitions, 2517 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:13:39,514 INFO L231 Difference]: Finished difference. Result has 84 places, 127 transitions, 1292 flow [2023-11-06 22:13:39,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1292, PETRI_PLACES=84, PETRI_TRANSITIONS=127} [2023-11-06 22:13:39,514 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 34 predicate places. [2023-11-06 22:13:39,514 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 127 transitions, 1292 flow [2023-11-06 22:13:39,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 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 22:13:39,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:39,515 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:39,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:39,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:39,721 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thrErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:13:39,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:39,722 INFO L85 PathProgramCache]: Analyzing trace with hash 169804150, now seen corresponding path program 1 times [2023-11-06 22:13:39,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:39,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540939848] [2023-11-06 22:13:39,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:39,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:13:39,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:39,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540939848] [2023-11-06 22:13:39,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540939848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:39,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:39,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:13:39,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268101349] [2023-11-06 22:13:39,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:39,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:13:39,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:39,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:13:39,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:13:40,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 357 [2023-11-06 22:13:40,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 127 transitions, 1292 flow. Second operand has 5 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 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 22:13:40,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:40,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 357 [2023-11-06 22:13:40,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:48,874 INFO L124 PetriNetUnfolderBase]: 43317/63883 cut-off events. [2023-11-06 22:13:48,874 INFO L125 PetriNetUnfolderBase]: For 208630/210286 co-relation queries the response was YES. [2023-11-06 22:13:49,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216038 conditions, 63883 events. 43317/63883 cut-off events. For 208630/210286 co-relation queries the response was YES. Maximal size of possible extension queue 4251. Compared 516114 event pairs, 10471 based on Foata normal form. 710/57256 useless extension candidates. Maximal degree in co-relation 216006. Up to 28596 conditions per place. [2023-11-06 22:13:49,402 INFO L140 encePairwiseOnDemand]: 343/357 looper letters, 265 selfloop transitions, 96 changer transitions 0/374 dead transitions. [2023-11-06 22:13:49,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 374 transitions, 4267 flow [2023-11-06 22:13:49,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:13:49,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:13:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1069 transitions. [2023-11-06 22:13:49,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777110844337735 [2023-11-06 22:13:49,408 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1069 transitions. [2023-11-06 22:13:49,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1069 transitions. [2023-11-06 22:13:49,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:49,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1069 transitions. [2023-11-06 22:13:49,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 152.71428571428572) internal successors, (1069), 7 states have internal predecessors, (1069), 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 22:13:49,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 357.0) internal successors, (2856), 8 states have internal predecessors, (2856), 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 22:13:49,420 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 357.0) internal successors, (2856), 8 states have internal predecessors, (2856), 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 22:13:49,420 INFO L175 Difference]: Start difference. First operand has 84 places, 127 transitions, 1292 flow. Second operand 7 states and 1069 transitions. [2023-11-06 22:13:49,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 374 transitions, 4267 flow [2023-11-06 22:13:51,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 374 transitions, 3907 flow, removed 80 selfloop flow, removed 3 redundant places. [2023-11-06 22:13:51,778 INFO L231 Difference]: Finished difference. Result has 92 places, 222 transitions, 2694 flow [2023-11-06 22:13:51,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2694, PETRI_PLACES=92, PETRI_TRANSITIONS=222} [2023-11-06 22:13:51,780 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 42 predicate places. [2023-11-06 22:13:51,780 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 222 transitions, 2694 flow [2023-11-06 22:13:51,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 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 22:13:51,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:51,781 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:51,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-06 22:13:51,781 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thrErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-06 22:13:51,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:51,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1084867332, now seen corresponding path program 2 times [2023-11-06 22:13:51,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:51,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081877229] [2023-11-06 22:13:51,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:51,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:52,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:52,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081877229] [2023-11-06 22:13:52,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081877229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:52,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930847956] [2023-11-06 22:13:52,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:13:52,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:52,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:52,030 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:52,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8306a87-455b-4b58-b04b-68ed01103ccf/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:13:52,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:13:52,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:52,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:13:52,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:52,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:52,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930847956] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:52,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:52,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 22:13:52,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628251695] [2023-11-06 22:13:52,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:52,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:13:52,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:52,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:13:52,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:13:52,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 357 [2023-11-06 22:13:52,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 222 transitions, 2694 flow. Second operand has 14 states, 14 states have (on average 131.57142857142858) internal successors, (1842), 14 states have internal predecessors, (1842), 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 22:13:52,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:52,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 357 [2023-11-06 22:13:52,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand