./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.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_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/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_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/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_39c42982-a429-43ae-bf77-ebc929343cb1/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 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:49:04,096 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:49:04,216 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:49:04,227 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:49:04,228 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:49:04,266 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:49:04,267 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:49:04,267 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:49:04,268 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:49:04,274 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:49:04,275 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:49:04,276 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:49:04,276 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:49:04,278 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:49:04,279 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:49:04,279 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:49:04,279 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:49:04,280 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:49:04,280 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:49:04,281 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:49:04,281 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:49:04,282 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:49:04,282 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:49:04,283 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:49:04,283 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:49:04,284 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:49:04,285 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:49:04,285 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:49:04,286 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:49:04,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:49:04,288 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:49:04,288 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:49:04,289 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:49:04,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:49:04,289 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:49:04,290 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:49:04,290 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:49:04,290 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:49:04,291 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_39c42982-a429-43ae-bf77-ebc929343cb1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 [2023-11-06 22:49:04,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:49:04,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:49:04,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:49:04,618 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:49:04,619 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:49:04,621 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-11-06 22:49:07,662 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:49:07,976 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:49:07,977 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-11-06 22:49:07,999 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/data/b26a30365/4e4c14fd056a451dbaeaa22b320b8253/FLAGe425b4f53 [2023-11-06 22:49:08,014 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/data/b26a30365/4e4c14fd056a451dbaeaa22b320b8253 [2023-11-06 22:49:08,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:49:08,018 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:49:08,020 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:49:08,020 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:49:08,026 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:49:08,027 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:08" (1/1) ... [2023-11-06 22:49:08,028 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d99d068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:08, skipping insertion in model container [2023-11-06 22:49:08,028 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:08" (1/1) ... [2023-11-06 22:49:08,109 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:49:08,782 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:49:08,820 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:49:08,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:49:09,023 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:49:09,024 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:09 WrapperNode [2023-11-06 22:49:09,024 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:49:09,026 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:49:09,026 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:49:09,026 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:49:09,035 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:09" (1/1) ... [2023-11-06 22:49:09,072 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:09" (1/1) ... [2023-11-06 22:49:09,135 INFO L138 Inliner]: procedures = 271, calls = 42, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 261 [2023-11-06 22:49:09,136 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:49:09,137 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:49:09,137 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:49:09,138 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:49:09,149 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:09" (1/1) ... [2023-11-06 22:49:09,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:09" (1/1) ... [2023-11-06 22:49:09,173 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:09" (1/1) ... [2023-11-06 22:49:09,173 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:09" (1/1) ... [2023-11-06 22:49:09,200 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:09" (1/1) ... [2023-11-06 22:49:09,207 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:09" (1/1) ... [2023-11-06 22:49:09,210 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:09" (1/1) ... [2023-11-06 22:49:09,212 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:09" (1/1) ... [2023-11-06 22:49:09,216 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:49:09,217 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:49:09,218 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:49:09,218 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:49:09,219 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:09" (1/1) ... [2023-11-06 22:49:09,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:49:09,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:09,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:49:09,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:49:09,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:49:09,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:49:09,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:49:09,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:49:09,368 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:49:09,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:49:09,369 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 22:49:09,369 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 22:49:09,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:49:09,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:49:09,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:49:09,371 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 22:49:09,572 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:49:09,574 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:49:10,058 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:49:10,069 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:49:10,069 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-11-06 22:49:10,078 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:10 BoogieIcfgContainer [2023-11-06 22:49:10,079 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:49:10,081 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:49:10,081 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:49:10,084 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:49:10,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:49:08" (1/3) ... [2023-11-06 22:49:10,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de53776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:10, skipping insertion in model container [2023-11-06 22:49:10,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:09" (2/3) ... [2023-11-06 22:49:10,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de53776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:10, skipping insertion in model container [2023-11-06 22:49:10,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:10" (3/3) ... [2023-11-06 22:49:10,087 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_72-funloop_hard_racing.i [2023-11-06 22:49:10,109 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:49:10,109 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-11-06 22:49:10,109 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:49:10,233 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 22:49:10,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 310 transitions, 627 flow [2023-11-06 22:49:10,449 INFO L124 PetriNetUnfolderBase]: 78/490 cut-off events. [2023-11-06 22:49:10,449 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:49:10,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 490 events. 78/490 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2634 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 272. Up to 8 conditions per place. [2023-11-06 22:49:10,464 INFO L82 GeneralOperation]: Start removeDead. Operand has 265 places, 310 transitions, 627 flow [2023-11-06 22:49:10,479 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 265 places, 310 transitions, 627 flow [2023-11-06 22:49:10,483 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:49:10,495 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 265 places, 310 transitions, 627 flow [2023-11-06 22:49:10,499 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 265 places, 310 transitions, 627 flow [2023-11-06 22:49:10,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 310 transitions, 627 flow [2023-11-06 22:49:10,637 INFO L124 PetriNetUnfolderBase]: 78/490 cut-off events. [2023-11-06 22:49:10,638 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:49:10,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 490 events. 78/490 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2634 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 272. Up to 8 conditions per place. [2023-11-06 22:49:10,666 INFO L119 LiptonReduction]: Number of co-enabled transitions 32364 [2023-11-06 22:49:17,336 INFO L134 LiptonReduction]: Checked pairs total: 59896 [2023-11-06 22:49:17,336 INFO L136 LiptonReduction]: Total number of compositions: 295 [2023-11-06 22:49:17,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:49:17,374 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;@20a4fe59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:49:17,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-11-06 22:49:17,377 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:49:17,377 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2023-11-06 22:49:17,377 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:49:17,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:17,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:49:17,379 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:49:17,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:17,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1211998, now seen corresponding path program 1 times [2023-11-06 22:49:17,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:17,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399389436] [2023-11-06 22:49:17,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:17,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:17,643 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 22:49:17,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:17,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399389436] [2023-11-06 22:49:17,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399389436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:17,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:49:17,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:49:17,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651869832] [2023-11-06 22:49:17,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:17,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:49:17,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:49:17,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:49:17,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 605 [2023-11-06 22:49:17,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 136 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 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 22:49:17,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:17,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 605 [2023-11-06 22:49:17,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:18,247 INFO L124 PetriNetUnfolderBase]: 1146/2489 cut-off events. [2023-11-06 22:49:18,248 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:49:18,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4651 conditions, 2489 events. 1146/2489 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 17589 event pairs, 980 based on Foata normal form. 188/1722 useless extension candidates. Maximal degree in co-relation 4524. Up to 2156 conditions per place. [2023-11-06 22:49:18,269 INFO L140 encePairwiseOnDemand]: 559/605 looper letters, 76 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-11-06 22:49:18,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 351 flow [2023-11-06 22:49:18,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:49:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:49:18,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 896 transitions. [2023-11-06 22:49:18,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49366391184573005 [2023-11-06 22:49:18,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 896 transitions. [2023-11-06 22:49:18,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 896 transitions. [2023-11-06 22:49:18,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:18,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 896 transitions. [2023-11-06 22:49:18,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 298.6666666666667) internal successors, (896), 3 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 22:49:18,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 605.0) internal successors, (2420), 4 states have internal predecessors, (2420), 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 22:49:18,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 605.0) internal successors, (2420), 4 states have internal predecessors, (2420), 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 22:49:18,323 INFO L175 Difference]: Start difference. First operand has 99 places, 136 transitions, 279 flow. Second operand 3 states and 896 transitions. [2023-11-06 22:49:18,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 351 flow [2023-11-06 22:49:18,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 94 transitions, 351 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:49:18,333 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 205 flow [2023-11-06 22:49:18,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=605, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2023-11-06 22:49:18,340 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -7 predicate places. [2023-11-06 22:49:18,341 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 205 flow [2023-11-06 22:49:18,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 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 22:49:18,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:18,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:49:18,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:49:18,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:49:18,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:18,344 INFO L85 PathProgramCache]: Analyzing trace with hash 37564706, now seen corresponding path program 1 times [2023-11-06 22:49:18,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:18,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814262890] [2023-11-06 22:49:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:18,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:18,538 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 22:49:18,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:18,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814262890] [2023-11-06 22:49:18,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814262890] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:18,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420134281] [2023-11-06 22:49:18,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:18,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:18,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:18,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:18,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:49:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:18,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:49:18,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:18,699 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 22:49:18,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:18,726 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 22:49:18,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420134281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:49:18,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:49:18,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:49:18,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160938090] [2023-11-06 22:49:18,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:18,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:49:18,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:18,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:49:18,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:49:18,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 605 [2023-11-06 22:49:18,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 205 flow. Second operand has 7 states, 7 states have (on average 258.2857142857143) internal successors, (1808), 7 states have internal predecessors, (1808), 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 22:49:18,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:18,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 605 [2023-11-06 22:49:18,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:19,346 INFO L124 PetriNetUnfolderBase]: 1146/2492 cut-off events. [2023-11-06 22:49:19,346 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:49:19,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4667 conditions, 2492 events. 1146/2492 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 17597 event pairs, 980 based on Foata normal form. 0/1537 useless extension candidates. Maximal degree in co-relation 4655. Up to 2156 conditions per place. [2023-11-06 22:49:19,365 INFO L140 encePairwiseOnDemand]: 602/605 looper letters, 76 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-11-06 22:49:19,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 379 flow [2023-11-06 22:49:19,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:49:19,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:49:19,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1626 transitions. [2023-11-06 22:49:19,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479338842975207 [2023-11-06 22:49:19,372 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1626 transitions. [2023-11-06 22:49:19,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1626 transitions. [2023-11-06 22:49:19,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:19,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1626 transitions. [2023-11-06 22:49:19,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 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 22:49:19,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 605.0) internal successors, (4235), 7 states have internal predecessors, (4235), 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 22:49:19,391 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 605.0) internal successors, (4235), 7 states have internal predecessors, (4235), 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 22:49:19,391 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 205 flow. Second operand 6 states and 1626 transitions. [2023-11-06 22:49:19,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 379 flow [2023-11-06 22:49:19,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 375 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:49:19,396 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 237 flow [2023-11-06 22:49:19,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=605, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=237, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2023-11-06 22:49:19,398 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2023-11-06 22:49:19,398 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 237 flow [2023-11-06 22:49:19,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 258.2857142857143) internal successors, (1808), 7 states have internal predecessors, (1808), 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 22:49:19,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:19,400 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-06 22:49:19,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:49:19,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 22:49:19,607 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:49:19,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:19,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1903489186, now seen corresponding path program 2 times [2023-11-06 22:49:19,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:19,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543776262] [2023-11-06 22:49:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:19,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:49:19,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:19,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543776262] [2023-11-06 22:49:19,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543776262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:19,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:49:19,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:49:19,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747415707] [2023-11-06 22:49:19,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:19,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:49:19,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:19,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:49:19,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:49:19,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 605 [2023-11-06 22:49:19,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 237 flow. Second operand has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 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 22:49:19,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:19,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 605 [2023-11-06 22:49:19,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:20,269 INFO L124 PetriNetUnfolderBase]: 1100/2390 cut-off events. [2023-11-06 22:49:20,269 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:49:20,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4492 conditions, 2390 events. 1100/2390 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16809 event pairs, 900 based on Foata normal form. 0/1500 useless extension candidates. Maximal degree in co-relation 4458. Up to 1981 conditions per place. [2023-11-06 22:49:20,287 INFO L140 encePairwiseOnDemand]: 600/605 looper letters, 97 selfloop transitions, 3 changer transitions 0/116 dead transitions. [2023-11-06 22:49:20,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 116 transitions, 475 flow [2023-11-06 22:49:20,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:49:20,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:49:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 863 transitions. [2023-11-06 22:49:20,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47548209366391186 [2023-11-06 22:49:20,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 863 transitions. [2023-11-06 22:49:20,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 863 transitions. [2023-11-06 22:49:20,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:20,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 863 transitions. [2023-11-06 22:49:20,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 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 22:49:20,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 605.0) internal successors, (2420), 4 states have internal predecessors, (2420), 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 22:49:20,303 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 605.0) internal successors, (2420), 4 states have internal predecessors, (2420), 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 22:49:20,303 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 237 flow. Second operand 3 states and 863 transitions. [2023-11-06 22:49:20,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 116 transitions, 475 flow [2023-11-06 22:49:20,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 116 transitions, 461 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 22:49:20,309 INFO L231 Difference]: Finished difference. Result has 98 places, 95 transitions, 225 flow [2023-11-06 22:49:20,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=605, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=98, PETRI_TRANSITIONS=95} [2023-11-06 22:49:20,310 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -1 predicate places. [2023-11-06 22:49:20,310 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 95 transitions, 225 flow [2023-11-06 22:49:20,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 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 22:49:20,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:20,312 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-06 22:49:20,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:49:20,312 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:49:20,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:20,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1903489185, now seen corresponding path program 1 times [2023-11-06 22:49:20,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:20,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764126024] [2023-11-06 22:49:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:20,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:20,400 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 22:49:20,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:20,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764126024] [2023-11-06 22:49:20,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764126024] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:20,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502420381] [2023-11-06 22:49:20,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:20,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:20,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:20,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:20,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:49:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:20,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:49:20,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:20,547 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 22:49:20,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:20,613 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 22:49:20,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502420381] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:49:20,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:49:20,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:49:20,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006459594] [2023-11-06 22:49:20,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:20,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:49:20,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:20,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:49:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:49:20,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 605 [2023-11-06 22:49:20,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 95 transitions, 225 flow. Second operand has 13 states, 13 states have (on average 258.15384615384613) internal successors, (3356), 13 states have internal predecessors, (3356), 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 22:49:20,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:20,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 605 [2023-11-06 22:49:20,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:21,103 INFO L124 PetriNetUnfolderBase]: 1102/2402 cut-off events. [2023-11-06 22:49:21,103 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-06 22:49:21,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4561 conditions, 2402 events. 1102/2402 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16802 event pairs, 940 based on Foata normal form. 6/1539 useless extension candidates. Maximal degree in co-relation 4509. Up to 2070 conditions per place. [2023-11-06 22:49:21,177 INFO L140 encePairwiseOnDemand]: 602/605 looper letters, 74 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2023-11-06 22:49:21,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 101 transitions, 431 flow [2023-11-06 22:49:21,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:49:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:49:21,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3175 transitions. [2023-11-06 22:49:21,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43732782369146006 [2023-11-06 22:49:21,189 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3175 transitions. [2023-11-06 22:49:21,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3175 transitions. [2023-11-06 22:49:21,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:21,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3175 transitions. [2023-11-06 22:49:21,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 264.5833333333333) internal successors, (3175), 12 states have internal predecessors, (3175), 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 22:49:21,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 605.0) internal successors, (7865), 13 states have internal predecessors, (7865), 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 22:49:21,223 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 605.0) internal successors, (7865), 13 states have internal predecessors, (7865), 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 22:49:21,223 INFO L175 Difference]: Start difference. First operand has 98 places, 95 transitions, 225 flow. Second operand 12 states and 3175 transitions. [2023-11-06 22:49:21,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 101 transitions, 431 flow [2023-11-06 22:49:21,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 101 transitions, 425 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:49:21,228 INFO L231 Difference]: Finished difference. Result has 113 places, 101 transitions, 303 flow [2023-11-06 22:49:21,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=605, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=303, PETRI_PLACES=113, PETRI_TRANSITIONS=101} [2023-11-06 22:49:21,230 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 14 predicate places. [2023-11-06 22:49:21,230 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 101 transitions, 303 flow [2023-11-06 22:49:21,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 258.15384615384613) internal successors, (3356), 13 states have internal predecessors, (3356), 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 22:49:21,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:21,232 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-06 22:49:21,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:49:21,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-06 22:49:21,438 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:49:21,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:21,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1409874143, now seen corresponding path program 2 times [2023-11-06 22:49:21,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:21,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659890876] [2023-11-06 22:49:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:21,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:49:21,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:21,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659890876] [2023-11-06 22:49:21,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659890876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:21,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:49:21,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:49:21,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89687929] [2023-11-06 22:49:21,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:21,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:49:21,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:21,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:49:21,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:49:21,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 605 [2023-11-06 22:49:21,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 101 transitions, 303 flow. Second operand has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 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 22:49:21,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:21,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 605 [2023-11-06 22:49:21,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:22,177 INFO L124 PetriNetUnfolderBase]: 1098/2342 cut-off events. [2023-11-06 22:49:22,178 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-06 22:49:22,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4444 conditions, 2342 events. 1098/2342 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16238 event pairs, 460 based on Foata normal form. 0/1478 useless extension candidates. Maximal degree in co-relation 4368. Up to 2014 conditions per place. [2023-11-06 22:49:22,195 INFO L140 encePairwiseOnDemand]: 601/605 looper letters, 105 selfloop transitions, 2 changer transitions 0/123 dead transitions. [2023-11-06 22:49:22,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 123 transitions, 561 flow [2023-11-06 22:49:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:49:22,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:49:22,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 870 transitions. [2023-11-06 22:49:22,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793388429752066 [2023-11-06 22:49:22,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 870 transitions. [2023-11-06 22:49:22,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 870 transitions. [2023-11-06 22:49:22,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:22,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 870 transitions. [2023-11-06 22:49:22,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.0) internal successors, (870), 3 states have internal predecessors, (870), 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 22:49:22,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 605.0) internal successors, (2420), 4 states have internal predecessors, (2420), 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 22:49:22,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 605.0) internal successors, (2420), 4 states have internal predecessors, (2420), 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 22:49:22,208 INFO L175 Difference]: Start difference. First operand has 113 places, 101 transitions, 303 flow. Second operand 3 states and 870 transitions. [2023-11-06 22:49:22,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 123 transitions, 561 flow [2023-11-06 22:49:22,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 123 transitions, 513 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-06 22:49:22,215 INFO L231 Difference]: Finished difference. Result has 111 places, 101 transitions, 265 flow [2023-11-06 22:49:22,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=605, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=111, PETRI_TRANSITIONS=101} [2023-11-06 22:49:22,216 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 12 predicate places. [2023-11-06 22:49:22,216 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 101 transitions, 265 flow [2023-11-06 22:49:22,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 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 22:49:22,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:22,217 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:22,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:49:22,218 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:49:22,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:22,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1076336583, now seen corresponding path program 1 times [2023-11-06 22:49:22,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:22,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557517611] [2023-11-06 22:49:22,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:22,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:49:22,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:22,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557517611] [2023-11-06 22:49:22,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557517611] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:22,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337664819] [2023-11-06 22:49:22,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:22,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:22,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:22,415 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:22,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:49:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:22,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:49:22,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:22,599 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:49:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:49:22,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:49:22,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337664819] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:49:22,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:49:22,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-06 22:49:22,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451584700] [2023-11-06 22:49:22,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:22,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:49:22,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:22,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:49:22,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:49:23,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 605 [2023-11-06 22:49:23,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 101 transitions, 265 flow. Second operand has 8 states, 8 states have (on average 255.125) internal successors, (2041), 8 states have internal predecessors, (2041), 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 22:49:23,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:23,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 605 [2023-11-06 22:49:23,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:23,317 INFO L124 PetriNetUnfolderBase]: 45/148 cut-off events. [2023-11-06 22:49:23,318 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2023-11-06 22:49:23,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 148 events. 45/148 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 567 event pairs, 0 based on Foata normal form. 21/143 useless extension candidates. Maximal degree in co-relation 299. Up to 84 conditions per place. [2023-11-06 22:49:23,319 INFO L140 encePairwiseOnDemand]: 601/605 looper letters, 57 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-11-06 22:49:23,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 67 transitions, 308 flow [2023-11-06 22:49:23,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:49:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:49:23,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1063 transitions. [2023-11-06 22:49:23,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43925619834710744 [2023-11-06 22:49:23,325 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1063 transitions. [2023-11-06 22:49:23,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1063 transitions. [2023-11-06 22:49:23,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:23,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1063 transitions. [2023-11-06 22:49:23,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 265.75) internal successors, (1063), 4 states have internal predecessors, (1063), 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 22:49:23,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 605.0) internal successors, (3025), 5 states have internal predecessors, (3025), 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 22:49:23,337 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 605.0) internal successors, (3025), 5 states have internal predecessors, (3025), 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 22:49:23,337 INFO L175 Difference]: Start difference. First operand has 111 places, 101 transitions, 265 flow. Second operand 4 states and 1063 transitions. [2023-11-06 22:49:23,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 67 transitions, 308 flow [2023-11-06 22:49:23,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 302 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:49:23,341 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 144 flow [2023-11-06 22:49:23,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=605, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=56, 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=4, PETRI_FLOW=144, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2023-11-06 22:49:23,345 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -40 predicate places. [2023-11-06 22:49:23,345 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 144 flow [2023-11-06 22:49:23,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 255.125) internal successors, (2041), 8 states have internal predecessors, (2041), 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 22:49:23,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:23,347 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-06 22:49:23,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:49:23,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:49:23,554 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:49:23,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:23,554 INFO L85 PathProgramCache]: Analyzing trace with hash -993303366, now seen corresponding path program 1 times [2023-11-06 22:49:23,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:23,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426733879] [2023-11-06 22:49:23,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:23,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:49:23,586 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:49:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:49:23,633 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:49:23,634 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:49:23,635 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2023-11-06 22:49:23,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2023-11-06 22:49:23,638 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2023-11-06 22:49:23,638 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2023-11-06 22:49:23,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2023-11-06 22:49:23,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2023-11-06 22:49:23,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2023-11-06 22:49:23,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2023-11-06 22:49:23,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2023-11-06 22:49:23,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK (40 of 50 remaining) [2023-11-06 22:49:23,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2023-11-06 22:49:23,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2023-11-06 22:49:23,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2023-11-06 22:49:23,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2023-11-06 22:49:23,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2023-11-06 22:49:23,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2023-11-06 22:49:23,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 50 remaining) [2023-11-06 22:49:23,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2023-11-06 22:49:23,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2023-11-06 22:49:23,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2023-11-06 22:49:23,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2023-11-06 22:49:23,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2023-11-06 22:49:23,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2023-11-06 22:49:23,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2023-11-06 22:49:23,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2023-11-06 22:49:23,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2023-11-06 22:49:23,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK (23 of 50 remaining) [2023-11-06 22:49:23,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2023-11-06 22:49:23,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2023-11-06 22:49:23,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2023-11-06 22:49:23,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2023-11-06 22:49:23,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2023-11-06 22:49:23,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2023-11-06 22:49:23,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2023-11-06 22:49:23,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2023-11-06 22:49:23,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2023-11-06 22:49:23,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2023-11-06 22:49:23,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2023-11-06 22:49:23,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2023-11-06 22:49:23,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2023-11-06 22:49:23,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2023-11-06 22:49:23,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2023-11-06 22:49:23,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2023-11-06 22:49:23,656 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2023-11-06 22:49:23,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2023-11-06 22:49:23,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2023-11-06 22:49:23,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2023-11-06 22:49:23,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2023-11-06 22:49:23,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2023-11-06 22:49:23,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2023-11-06 22:49:23,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:49:23,659 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2023-11-06 22:49:23,662 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:49:23,662 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:49:23,722 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:49:23,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 340 places, 399 transitions, 814 flow [2023-11-06 22:49:23,872 INFO L124 PetriNetUnfolderBase]: 126/790 cut-off events. [2023-11-06 22:49:23,872 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:49:23,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 790 events. 126/790 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4684 event pairs, 0 based on Foata normal form. 0/554 useless extension candidates. Maximal degree in co-relation 492. Up to 12 conditions per place. [2023-11-06 22:49:23,882 INFO L82 GeneralOperation]: Start removeDead. Operand has 340 places, 399 transitions, 814 flow [2023-11-06 22:49:23,900 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 340 places, 399 transitions, 814 flow [2023-11-06 22:49:23,901 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:49:23,901 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 340 places, 399 transitions, 814 flow [2023-11-06 22:49:23,902 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 340 places, 399 transitions, 814 flow [2023-11-06 22:49:23,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 340 places, 399 transitions, 814 flow [2023-11-06 22:49:24,047 INFO L124 PetriNetUnfolderBase]: 126/790 cut-off events. [2023-11-06 22:49:24,047 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:49:24,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 790 events. 126/790 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4684 event pairs, 0 based on Foata normal form. 0/554 useless extension candidates. Maximal degree in co-relation 492. Up to 12 conditions per place. [2023-11-06 22:49:24,167 INFO L119 LiptonReduction]: Number of co-enabled transitions 81780 [2023-11-06 22:49:31,863 INFO L134 LiptonReduction]: Checked pairs total: 171150 [2023-11-06 22:49:31,864 INFO L136 LiptonReduction]: Total number of compositions: 380 [2023-11-06 22:49:31,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:49:31,867 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;@20a4fe59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:49:31,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2023-11-06 22:49:31,869 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:49:31,870 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-06 22:49:31,870 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:49:31,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:31,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:49:31,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-11-06 22:49:31,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:31,871 INFO L85 PathProgramCache]: Analyzing trace with hash 2066680, now seen corresponding path program 1 times [2023-11-06 22:49:31,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:31,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41655506] [2023-11-06 22:49:31,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:31,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:31,899 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 22:49:31,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:31,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41655506] [2023-11-06 22:49:31,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41655506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:31,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:49:31,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:49:31,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767934535] [2023-11-06 22:49:31,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:31,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:49:31,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:31,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:49:31,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:49:31,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 779 [2023-11-06 22:49:31,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 180 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 332.0) internal successors, (996), 3 states have internal predecessors, (996), 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 22:49:31,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:31,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 779 [2023-11-06 22:49:31,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:40,848 INFO L124 PetriNetUnfolderBase]: 52380/83658 cut-off events. [2023-11-06 22:49:40,848 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2023-11-06 22:49:40,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158972 conditions, 83658 events. 52380/83658 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 3295. Compared 739287 event pairs, 46880 based on Foata normal form. 6544/61443 useless extension candidates. Maximal degree in co-relation 64311. Up to 75193 conditions per place. [2023-11-06 22:49:41,347 INFO L140 encePairwiseOnDemand]: 721/779 looper letters, 101 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2023-11-06 22:49:41,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 126 transitions, 474 flow [2023-11-06 22:49:41,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:49:41,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:49:41,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1152 transitions. [2023-11-06 22:49:41,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49293966623876767 [2023-11-06 22:49:41,359 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1152 transitions. [2023-11-06 22:49:41,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1152 transitions. [2023-11-06 22:49:41,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:41,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1152 transitions. [2023-11-06 22:49:41,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 384.0) internal successors, (1152), 3 states have internal predecessors, (1152), 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 22:49:41,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 779.0) internal successors, (3116), 4 states have internal predecessors, (3116), 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 22:49:41,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 779.0) internal successors, (3116), 4 states have internal predecessors, (3116), 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 22:49:41,374 INFO L175 Difference]: Start difference. First operand has 132 places, 180 transitions, 376 flow. Second operand 3 states and 1152 transitions. [2023-11-06 22:49:41,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 126 transitions, 474 flow [2023-11-06 22:49:41,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 126 transitions, 474 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:49:41,379 INFO L231 Difference]: Finished difference. Result has 123 places, 126 transitions, 278 flow [2023-11-06 22:49:41,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=779, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=123, PETRI_TRANSITIONS=126} [2023-11-06 22:49:41,382 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -9 predicate places. [2023-11-06 22:49:41,383 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 126 transitions, 278 flow [2023-11-06 22:49:41,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 332.0) internal successors, (996), 3 states have internal predecessors, (996), 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 22:49:41,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:41,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:49:41,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:49:41,385 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-11-06 22:49:41,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:41,386 INFO L85 PathProgramCache]: Analyzing trace with hash 64063673, now seen corresponding path program 1 times [2023-11-06 22:49:41,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:41,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054833306] [2023-11-06 22:49:41,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:41,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:41,425 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 22:49:41,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:41,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054833306] [2023-11-06 22:49:41,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054833306] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:41,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484051775] [2023-11-06 22:49:41,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:41,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:41,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:41,428 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:41,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:49:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:41,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:49:41,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:41,551 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 22:49:41,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:41,566 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 22:49:41,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484051775] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:49:41,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:49:41,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-06 22:49:41,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203064302] [2023-11-06 22:49:41,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:41,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:49:41,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:41,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:49:41,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:49:41,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 779 [2023-11-06 22:49:41,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 126 transitions, 278 flow. Second operand has 6 states, 6 states have (on average 331.1666666666667) internal successors, (1987), 6 states have internal predecessors, (1987), 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 22:49:41,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:41,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 779 [2023-11-06 22:49:41,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:49,591 INFO L124 PetriNetUnfolderBase]: 52380/83661 cut-off events. [2023-11-06 22:49:49,592 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2023-11-06 22:49:49,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158988 conditions, 83661 events. 52380/83661 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 3295. Compared 739366 event pairs, 46880 based on Foata normal form. 0/54902 useless extension candidates. Maximal degree in co-relation 158975. Up to 75193 conditions per place. [2023-11-06 22:49:50,059 INFO L140 encePairwiseOnDemand]: 776/779 looper letters, 101 selfloop transitions, 5 changer transitions 0/129 dead transitions. [2023-11-06 22:49:50,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 129 transitions, 502 flow [2023-11-06 22:49:50,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:49:50,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:49:50,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2089 transitions. [2023-11-06 22:49:50,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4469405220367993 [2023-11-06 22:49:50,070 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2089 transitions. [2023-11-06 22:49:50,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2089 transitions. [2023-11-06 22:49:50,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:50,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2089 transitions. [2023-11-06 22:49:50,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 348.1666666666667) internal successors, (2089), 6 states have internal predecessors, (2089), 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 22:49:50,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 779.0) internal successors, (5453), 7 states have internal predecessors, (5453), 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 22:49:50,093 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 779.0) internal successors, (5453), 7 states have internal predecessors, (5453), 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 22:49:50,093 INFO L175 Difference]: Start difference. First operand has 123 places, 126 transitions, 278 flow. Second operand 6 states and 2089 transitions. [2023-11-06 22:49:50,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 129 transitions, 502 flow [2023-11-06 22:49:50,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 129 transitions, 498 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:49:50,099 INFO L231 Difference]: Finished difference. Result has 130 places, 129 transitions, 310 flow [2023-11-06 22:49:50,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=779, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=130, PETRI_TRANSITIONS=129} [2023-11-06 22:49:50,103 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -2 predicate places. [2023-11-06 22:49:50,103 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 129 transitions, 310 flow [2023-11-06 22:49:50,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 331.1666666666667) internal successors, (1987), 6 states have internal predecessors, (1987), 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 22:49:50,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:50,105 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-06 22:49:50,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:49:50,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:50,311 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-11-06 22:49:50,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:50,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1552019768, now seen corresponding path program 2 times [2023-11-06 22:49:50,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:50,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319565806] [2023-11-06 22:49:50,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:50,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:49:50,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:50,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319565806] [2023-11-06 22:49:50,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319565806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:50,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:49:50,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:49:50,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305916949] [2023-11-06 22:49:50,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:50,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:49:50,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:50,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:49:50,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:49:50,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 779 [2023-11-06 22:49:50,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 129 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 329.3333333333333) internal successors, (988), 3 states have internal predecessors, (988), 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 22:49:50,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:50,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 779 [2023-11-06 22:49:50,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:58,782 INFO L124 PetriNetUnfolderBase]: 50210/79993 cut-off events. [2023-11-06 22:49:58,782 INFO L125 PetriNetUnfolderBase]: For 185/185 co-relation queries the response was YES. [2023-11-06 22:49:58,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152299 conditions, 79993 events. 50210/79993 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 3161. Compared 703446 event pairs, 43044 based on Foata normal form. 0/52972 useless extension candidates. Maximal degree in co-relation 152264. Up to 69080 conditions per place. [2023-11-06 22:49:59,239 INFO L140 encePairwiseOnDemand]: 774/779 looper letters, 145 selfloop transitions, 3 changer transitions 0/171 dead transitions. [2023-11-06 22:49:59,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 171 transitions, 690 flow [2023-11-06 22:49:59,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:49:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:49:59,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1130 transitions. [2023-11-06 22:49:59,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48352588789045786 [2023-11-06 22:49:59,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1130 transitions. [2023-11-06 22:49:59,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1130 transitions. [2023-11-06 22:49:59,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:59,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1130 transitions. [2023-11-06 22:49:59,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 376.6666666666667) internal successors, (1130), 3 states have internal predecessors, (1130), 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 22:49:59,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 779.0) internal successors, (3116), 4 states have internal predecessors, (3116), 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 22:49:59,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 779.0) internal successors, (3116), 4 states have internal predecessors, (3116), 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 22:49:59,265 INFO L175 Difference]: Start difference. First operand has 130 places, 129 transitions, 310 flow. Second operand 3 states and 1130 transitions. [2023-11-06 22:49:59,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 171 transitions, 690 flow [2023-11-06 22:49:59,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 171 transitions, 676 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 22:49:59,271 INFO L231 Difference]: Finished difference. Result has 129 places, 127 transitions, 298 flow [2023-11-06 22:49:59,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=779, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=129, PETRI_TRANSITIONS=127} [2023-11-06 22:49:59,273 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -3 predicate places. [2023-11-06 22:49:59,273 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 127 transitions, 298 flow [2023-11-06 22:49:59,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 329.3333333333333) internal successors, (988), 3 states have internal predecessors, (988), 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 22:49:59,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:59,275 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-06 22:49:59,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:49:59,275 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-11-06 22:49:59,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:59,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1552019767, now seen corresponding path program 1 times [2023-11-06 22:49:59,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:59,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853487695] [2023-11-06 22:49:59,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:59,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:59,346 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 22:49:59,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:59,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853487695] [2023-11-06 22:49:59,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853487695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:59,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59746397] [2023-11-06 22:49:59,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:59,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:59,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:59,349 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:59,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:49:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:59,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:49:59,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:59,483 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 22:49:59,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:59,545 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 22:49:59,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59746397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:49:59,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:49:59,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:49:59,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547800186] [2023-11-06 22:49:59,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:59,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:49:59,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:59,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:49:59,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:49:59,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 779 [2023-11-06 22:49:59,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 127 transitions, 298 flow. Second operand has 13 states, 13 states have (on average 331.15384615384613) internal successors, (4305), 13 states have internal predecessors, (4305), 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 22:49:59,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:59,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 779 [2023-11-06 22:49:59,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:50:08,572 INFO L124 PetriNetUnfolderBase]: 50296/80315 cut-off events. [2023-11-06 22:50:08,572 INFO L125 PetriNetUnfolderBase]: For 713/713 co-relation queries the response was YES. [2023-11-06 22:50:08,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153690 conditions, 80315 events. 50296/80315 cut-off events. For 713/713 co-relation queries the response was YES. Maximal size of possible extension queue 3145. Compared 706517 event pairs, 44972 based on Foata normal form. 6/53849 useless extension candidates. Maximal degree in co-relation 153637. Up to 72159 conditions per place. [2023-11-06 22:50:09,061 INFO L140 encePairwiseOnDemand]: 776/779 looper letters, 99 selfloop transitions, 11 changer transitions 0/133 dead transitions. [2023-11-06 22:50:09,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 133 transitions, 554 flow [2023-11-06 22:50:09,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:50:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:50:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4076 transitions. [2023-11-06 22:50:09,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4360290971330766 [2023-11-06 22:50:09,083 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4076 transitions. [2023-11-06 22:50:09,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4076 transitions. [2023-11-06 22:50:09,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:50:09,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4076 transitions. [2023-11-06 22:50:09,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 339.6666666666667) internal successors, (4076), 12 states have internal predecessors, (4076), 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 22:50:09,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 779.0) internal successors, (10127), 13 states have internal predecessors, (10127), 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 22:50:09,121 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 779.0) internal successors, (10127), 13 states have internal predecessors, (10127), 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 22:50:09,121 INFO L175 Difference]: Start difference. First operand has 129 places, 127 transitions, 298 flow. Second operand 12 states and 4076 transitions. [2023-11-06 22:50:09,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 133 transitions, 554 flow [2023-11-06 22:50:09,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 133 transitions, 548 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:50:09,151 INFO L231 Difference]: Finished difference. Result has 144 places, 133 transitions, 376 flow [2023-11-06 22:50:09,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=779, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=376, PETRI_PLACES=144, PETRI_TRANSITIONS=133} [2023-11-06 22:50:09,153 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, 12 predicate places. [2023-11-06 22:50:09,153 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 133 transitions, 376 flow [2023-11-06 22:50:09,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 331.15384615384613) internal successors, (4305), 13 states have internal predecessors, (4305), 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 22:50:09,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:50:09,155 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-06 22:50:09,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 22:50:09,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c42982-a429-43ae-bf77-ebc929343cb1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:09,361 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-11-06 22:50:09,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:09,362 INFO L85 PathProgramCache]: Analyzing trace with hash 273420695, now seen corresponding path program 2 times [2023-11-06 22:50:09,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:09,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791155451] [2023-11-06 22:50:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:09,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:50:09,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:09,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791155451] [2023-11-06 22:50:09,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791155451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:50:09,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:50:09,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:50:09,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32492617] [2023-11-06 22:50:09,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:50:09,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:50:09,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:09,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:50:09,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:50:09,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 779 [2023-11-06 22:50:09,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 133 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 331.3333333333333) internal successors, (994), 3 states have internal predecessors, (994), 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 22:50:09,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:50:09,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 779 [2023-11-06 22:50:09,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand