./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c --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_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/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_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/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_6698f653-e270-45f9-bee6-2a03e6a44364/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 b869eaba59e8dca8d7cb2d1135193e506b8377811cada7a7f67b6d0824dd2d3d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:14:41,262 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:14:41,386 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 21:14:41,396 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:14:41,397 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:14:41,437 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:14:41,439 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:14:41,440 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:14:41,441 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:14:41,446 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:14:41,447 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:14:41,448 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:14:41,448 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:14:41,450 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:14:41,451 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:14:41,451 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:14:41,452 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:14:41,452 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:14:41,453 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:14:41,463 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:14:41,463 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:14:41,464 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:14:41,465 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:14:41,465 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:14:41,466 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:14:41,466 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:14:41,467 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:14:41,468 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:14:41,469 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:14:41,469 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:41,471 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:14:41,471 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:14:41,471 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:14:41,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:14:41,472 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:14:41,472 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:14:41,473 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:14:41,473 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:14:41,473 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_6698f653-e270-45f9-bee6-2a03e6a44364/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b869eaba59e8dca8d7cb2d1135193e506b8377811cada7a7f67b6d0824dd2d3d [2023-11-06 21:14:41,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:14:41,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:14:41,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:14:41,795 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:14:41,796 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:14:41,797 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2023-11-06 21:14:44,910 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:14:45,207 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:14:45,208 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2023-11-06 21:14:45,225 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/data/cfc76b328/b1716ede2251460988112ffef9b88283/FLAGae8c6020f [2023-11-06 21:14:45,245 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/data/cfc76b328/b1716ede2251460988112ffef9b88283 [2023-11-06 21:14:45,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:14:45,254 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:14:45,259 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:45,259 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:14:45,264 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:14:45,265 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:45" (1/1) ... [2023-11-06 21:14:45,266 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f8b53d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:45, skipping insertion in model container [2023-11-06 21:14:45,266 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:45" (1/1) ... [2023-11-06 21:14:45,314 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:14:45,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:45,574 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:14:45,629 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:45,651 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:14:45,651 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:45 WrapperNode [2023-11-06 21:14:45,652 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:45,654 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:45,654 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:14:45,655 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:14:45,663 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:45" (1/1) ... [2023-11-06 21:14:45,684 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:45" (1/1) ... [2023-11-06 21:14:45,735 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 22, calls inlined = 30, statements flattened = 409 [2023-11-06 21:14:45,736 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:45,736 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:14:45,737 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:14:45,737 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:14:45,747 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:45" (1/1) ... [2023-11-06 21:14:45,747 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:45" (1/1) ... [2023-11-06 21:14:45,754 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:45" (1/1) ... [2023-11-06 21:14:45,754 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:45" (1/1) ... [2023-11-06 21:14:45,771 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:45" (1/1) ... [2023-11-06 21:14:45,777 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:45" (1/1) ... [2023-11-06 21:14:45,780 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:45" (1/1) ... [2023-11-06 21:14:45,783 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:45" (1/1) ... [2023-11-06 21:14:45,790 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:14:45,791 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:14:45,791 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:14:45,791 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:14:45,792 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:45" (1/1) ... [2023-11-06 21:14:45,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:45,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:45,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:14:45,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:14:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:14:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:14:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:14:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:14:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 21:14:45,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 21:14:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 21:14:45,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 21:14:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:14:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:14:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:14:45,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:14:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:14:45,882 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:14:46,038 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:14:46,040 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:14:46,932 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:14:46,945 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:14:46,946 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 21:14:46,953 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:46 BoogieIcfgContainer [2023-11-06 21:14:46,953 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:14:46,957 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:14:46,958 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:14:46,961 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:14:46,961 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:14:45" (1/3) ... [2023-11-06 21:14:46,962 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a0f6a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:46, skipping insertion in model container [2023-11-06 21:14:46,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:45" (2/3) ... [2023-11-06 21:14:46,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a0f6a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:46, skipping insertion in model container [2023-11-06 21:14:46,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:46" (3/3) ... [2023-11-06 21:14:46,968 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2023-11-06 21:14:46,989 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:14:46,989 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2023-11-06 21:14:46,989 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:14:47,225 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 21:14:47,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 541 places, 583 transitions, 1180 flow [2023-11-06 21:14:47,554 INFO L124 PetriNetUnfolderBase]: 49/581 cut-off events. [2023-11-06 21:14:47,554 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 21:14:47,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 590 conditions, 581 events. 49/581 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1866 event pairs, 0 based on Foata normal form. 0/486 useless extension candidates. Maximal degree in co-relation 393. Up to 2 conditions per place. [2023-11-06 21:14:47,576 INFO L82 GeneralOperation]: Start removeDead. Operand has 541 places, 583 transitions, 1180 flow [2023-11-06 21:14:47,598 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 534 places, 576 transitions, 1164 flow [2023-11-06 21:14:47,602 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:14:47,618 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 534 places, 576 transitions, 1164 flow [2023-11-06 21:14:47,623 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 534 places, 576 transitions, 1164 flow [2023-11-06 21:14:47,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 534 places, 576 transitions, 1164 flow [2023-11-06 21:14:47,807 INFO L124 PetriNetUnfolderBase]: 49/576 cut-off events. [2023-11-06 21:14:47,808 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 21:14:47,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 576 events. 49/576 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1868 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 393. Up to 2 conditions per place. [2023-11-06 21:14:47,861 INFO L119 LiptonReduction]: Number of co-enabled transitions 80136 [2023-11-06 21:15:20,030 INFO L134 LiptonReduction]: Checked pairs total: 86043 [2023-11-06 21:15:20,034 INFO L136 LiptonReduction]: Total number of compositions: 777 [2023-11-06 21:15:20,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:15:20,071 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;@18433f5b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:15:20,071 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2023-11-06 21:15:20,074 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:15:20,074 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 21:15:20,074 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:15:20,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:20,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 21:15:20,076 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:15:20,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:20,081 INFO L85 PathProgramCache]: Analyzing trace with hash 81401, now seen corresponding path program 1 times [2023-11-06 21:15:20,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:20,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531890117] [2023-11-06 21:15:20,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:20,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:20,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:20,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531890117] [2023-11-06 21:15:20,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531890117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:20,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:20,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:15:20,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190008059] [2023-11-06 21:15:20,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:20,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:15:20,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:20,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:15:20,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:15:20,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 535 out of 1360 [2023-11-06 21:15:20,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 535.6666666666666) internal successors, (1607), 3 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:20,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:20,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 535 of 1360 [2023-11-06 21:15:21,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:21,800 INFO L124 PetriNetUnfolderBase]: 1907/2918 cut-off events. [2023-11-06 21:15:21,800 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-11-06 21:15:21,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5900 conditions, 2918 events. 1907/2918 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 14939 event pairs, 1505 based on Foata normal form. 0/850 useless extension candidates. Maximal degree in co-relation 5696. Up to 2915 conditions per place. [2023-11-06 21:15:21,825 INFO L140 encePairwiseOnDemand]: 1338/1360 looper letters, 63 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-11-06 21:15:21,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 280 flow [2023-11-06 21:15:21,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:15:21,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:15:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1691 transitions. [2023-11-06 21:15:21,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144607843137255 [2023-11-06 21:15:21,849 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1691 transitions. [2023-11-06 21:15:21,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1691 transitions. [2023-11-06 21:15:21,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:21,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1691 transitions. [2023-11-06 21:15:21,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 563.6666666666666) internal successors, (1691), 3 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:21,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1360.0) internal successors, (5440), 4 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:21,884 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1360.0) internal successors, (5440), 4 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:21,887 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 164 flow. Second operand 3 states and 1691 transitions. [2023-11-06 21:15:21,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 280 flow [2023-11-06 21:15:21,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 272 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 21:15:21,896 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 160 flow [2023-11-06 21:15:21,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=60, PETRI_TRANSITIONS=65} [2023-11-06 21:15:21,902 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -14 predicate places. [2023-11-06 21:15:21,902 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 160 flow [2023-11-06 21:15:21,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 535.6666666666666) internal successors, (1607), 3 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:21,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:21,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 21:15:21,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:15:21,905 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:15:21,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:21,906 INFO L85 PathProgramCache]: Analyzing trace with hash 81400, now seen corresponding path program 1 times [2023-11-06 21:15:21,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:21,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095344958] [2023-11-06 21:15:21,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:21,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:21,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:21,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095344958] [2023-11-06 21:15:21,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095344958] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:21,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:21,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:15:21,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174550547] [2023-11-06 21:15:21,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:21,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:15:21,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:21,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:15:21,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:15:22,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 541 out of 1360 [2023-11-06 21:15:22,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 65 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 541.6666666666666) internal successors, (1625), 3 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:22,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:22,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 541 of 1360 [2023-11-06 21:15:22,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:22,751 INFO L124 PetriNetUnfolderBase]: 1907/2914 cut-off events. [2023-11-06 21:15:22,751 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 21:15:22,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5870 conditions, 2914 events. 1907/2914 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 14842 event pairs, 1505 based on Foata normal form. 4/855 useless extension candidates. Maximal degree in co-relation 5846. Up to 2907 conditions per place. [2023-11-06 21:15:22,773 INFO L140 encePairwiseOnDemand]: 1354/1360 looper letters, 59 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2023-11-06 21:15:22,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 282 flow [2023-11-06 21:15:22,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:15:22,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:15:22,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1686 transitions. [2023-11-06 21:15:22,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41323529411764703 [2023-11-06 21:15:22,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1686 transitions. [2023-11-06 21:15:22,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1686 transitions. [2023-11-06 21:15:22,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:22,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1686 transitions. [2023-11-06 21:15:22,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 562.0) internal successors, (1686), 3 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:22,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1360.0) internal successors, (5440), 4 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:22,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1360.0) internal successors, (5440), 4 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:22,803 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 160 flow. Second operand 3 states and 1686 transitions. [2023-11-06 21:15:22,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 282 flow [2023-11-06 21:15:22,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 63 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:15:22,806 INFO L231 Difference]: Finished difference. Result has 59 places, 63 transitions, 160 flow [2023-11-06 21:15:22,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=59, PETRI_TRANSITIONS=63} [2023-11-06 21:15:22,807 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -15 predicate places. [2023-11-06 21:15:22,808 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 63 transitions, 160 flow [2023-11-06 21:15:22,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 541.6666666666666) internal successors, (1625), 3 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:22,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:22,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 21:15:22,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:15:22,810 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:15:22,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:22,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2529750, now seen corresponding path program 1 times [2023-11-06 21:15:22,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:22,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602590014] [2023-11-06 21:15:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:22,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:23,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:23,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602590014] [2023-11-06 21:15:23,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602590014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:23,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465193481] [2023-11-06 21:15:23,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:23,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:23,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:23,027 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:23,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:15:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:23,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 21:15:23,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:23,280 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 21:15:23,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:23,294 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:15:23,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:23,314 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 21:15:23,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:23,322 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:15:23,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:23,329 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:15:23,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:23,336 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:15:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:23,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:23,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465193481] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:23,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:15:23,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-06 21:15:23,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140661198] [2023-11-06 21:15:23,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:23,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:15:23,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:23,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:15:23,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:15:24,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 529 out of 1360 [2023-11-06 21:15:24,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 63 transitions, 160 flow. Second operand has 8 states, 8 states have (on average 530.125) internal successors, (4241), 8 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:24,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:24,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 529 of 1360 [2023-11-06 21:15:24,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:25,073 INFO L124 PetriNetUnfolderBase]: 1915/2928 cut-off events. [2023-11-06 21:15:25,074 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 21:15:25,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5920 conditions, 2928 events. 1915/2928 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 14849 event pairs, 1505 based on Foata normal form. 1/860 useless extension candidates. Maximal degree in co-relation 5831. Up to 2919 conditions per place. [2023-11-06 21:15:25,097 INFO L140 encePairwiseOnDemand]: 1351/1360 looper letters, 59 selfloop transitions, 18 changer transitions 0/77 dead transitions. [2023-11-06 21:15:25,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 77 transitions, 382 flow [2023-11-06 21:15:25,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:15:25,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:15:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3261 transitions. [2023-11-06 21:15:25,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3996323529411765 [2023-11-06 21:15:25,111 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3261 transitions. [2023-11-06 21:15:25,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3261 transitions. [2023-11-06 21:15:25,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:25,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3261 transitions. [2023-11-06 21:15:25,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 543.5) internal successors, (3261), 6 states have internal predecessors, (3261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:25,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1360.0) internal successors, (9520), 7 states have internal predecessors, (9520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:25,150 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1360.0) internal successors, (9520), 7 states have internal predecessors, (9520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:25,150 INFO L175 Difference]: Start difference. First operand has 59 places, 63 transitions, 160 flow. Second operand 6 states and 3261 transitions. [2023-11-06 21:15:25,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 77 transitions, 382 flow [2023-11-06 21:15:25,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:15:25,154 INFO L231 Difference]: Finished difference. Result has 65 places, 77 transitions, 286 flow [2023-11-06 21:15:25,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=65, PETRI_TRANSITIONS=77} [2023-11-06 21:15:25,155 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -9 predicate places. [2023-11-06 21:15:25,155 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 77 transitions, 286 flow [2023-11-06 21:15:25,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 530.125) internal successors, (4241), 8 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:25,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:25,160 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 21:15:25,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:25,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:25,366 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:15:25,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:25,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1939354311, now seen corresponding path program 2 times [2023-11-06 21:15:25,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:25,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002599523] [2023-11-06 21:15:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:25,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:25,759 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 21:15:25,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:25,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002599523] [2023-11-06 21:15:25,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002599523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:25,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809550912] [2023-11-06 21:15:25,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:15:25,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:25,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:25,762 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:25,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:15:25,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:15:25,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:15:25,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 21:15:25,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:25,916 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 7 [2023-11-06 21:15:25,924 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:15:25,930 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:15:25,935 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:15:25,948 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:15:25,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 21:15:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:26,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:15:26,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809550912] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:26,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:15:26,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2023-11-06 21:15:26,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782464211] [2023-11-06 21:15:26,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:26,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:15:26,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:26,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:15:26,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:15:26,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 537 out of 1360 [2023-11-06 21:15:26,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 77 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 537.8571428571429) internal successors, (3765), 7 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:26,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:26,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 537 of 1360 [2023-11-06 21:15:26,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:27,597 INFO L124 PetriNetUnfolderBase]: 1915/2926 cut-off events. [2023-11-06 21:15:27,598 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-06 21:15:27,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5944 conditions, 2926 events. 1915/2926 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 14578 event pairs, 1505 based on Foata normal form. 2/860 useless extension candidates. Maximal degree in co-relation 5887. Up to 2913 conditions per place. [2023-11-06 21:15:27,621 INFO L140 encePairwiseOnDemand]: 1351/1360 looper letters, 54 selfloop transitions, 21 changer transitions 0/75 dead transitions. [2023-11-06 21:15:27,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 75 transitions, 416 flow [2023-11-06 21:15:27,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:15:27,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 21:15:27,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3836 transitions. [2023-11-06 21:15:27,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40294117647058825 [2023-11-06 21:15:27,638 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3836 transitions. [2023-11-06 21:15:27,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3836 transitions. [2023-11-06 21:15:27,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:27,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3836 transitions. [2023-11-06 21:15:27,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 548.0) internal successors, (3836), 7 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:27,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1360.0) internal successors, (10880), 8 states have internal predecessors, (10880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:27,688 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1360.0) internal successors, (10880), 8 states have internal predecessors, (10880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:27,696 INFO L175 Difference]: Start difference. First operand has 65 places, 77 transitions, 286 flow. Second operand 7 states and 3836 transitions. [2023-11-06 21:15:27,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 75 transitions, 416 flow [2023-11-06 21:15:27,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 75 transitions, 350 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-11-06 21:15:27,700 INFO L231 Difference]: Finished difference. Result has 64 places, 75 transitions, 242 flow [2023-11-06 21:15:27,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=242, PETRI_PLACES=64, PETRI_TRANSITIONS=75} [2023-11-06 21:15:27,703 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -10 predicate places. [2023-11-06 21:15:27,704 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 75 transitions, 242 flow [2023-11-06 21:15:27,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 537.8571428571429) internal successors, (3765), 7 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:27,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:27,706 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-06 21:15:27,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:27,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:27,914 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:15:27,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:27,914 INFO L85 PathProgramCache]: Analyzing trace with hash 15953125, now seen corresponding path program 1 times [2023-11-06 21:15:27,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:27,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865310787] [2023-11-06 21:15:27,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:27,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:15:28,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:28,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865310787] [2023-11-06 21:15:28,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865310787] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:28,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223424050] [2023-11-06 21:15:28,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:28,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:28,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:28,081 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:28,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:15:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:28,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:15:28,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:15:28,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:15:28,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223424050] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:28,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:15:28,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-11-06 21:15:28,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205185384] [2023-11-06 21:15:28,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:28,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 21:15:28,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:28,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 21:15:28,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:15:28,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 537 out of 1360 [2023-11-06 21:15:28,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 75 transitions, 242 flow. Second operand has 11 states, 11 states have (on average 538.4545454545455) internal successors, (5923), 11 states have internal predecessors, (5923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:28,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:28,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 537 of 1360 [2023-11-06 21:15:28,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:29,128 INFO L124 PetriNetUnfolderBase]: 1907/2920 cut-off events. [2023-11-06 21:15:29,129 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 21:15:29,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5899 conditions, 2920 events. 1907/2920 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 14688 event pairs, 1505 based on Foata normal form. 2/862 useless extension candidates. Maximal degree in co-relation 5831. Up to 2911 conditions per place. [2023-11-06 21:15:29,157 INFO L140 encePairwiseOnDemand]: 1353/1360 looper letters, 57 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2023-11-06 21:15:29,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 340 flow [2023-11-06 21:15:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:15:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 21:15:29,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3840 transitions. [2023-11-06 21:15:29,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40336134453781514 [2023-11-06 21:15:29,172 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3840 transitions. [2023-11-06 21:15:29,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3840 transitions. [2023-11-06 21:15:29,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:29,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3840 transitions. [2023-11-06 21:15:29,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 548.5714285714286) internal successors, (3840), 7 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:29,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1360.0) internal successors, (10880), 8 states have internal predecessors, (10880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:29,207 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1360.0) internal successors, (10880), 8 states have internal predecessors, (10880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:29,208 INFO L175 Difference]: Start difference. First operand has 64 places, 75 transitions, 242 flow. Second operand 7 states and 3840 transitions. [2023-11-06 21:15:29,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 340 flow [2023-11-06 21:15:29,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 320 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-06 21:15:29,216 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 220 flow [2023-11-06 21:15:29,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=220, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2023-11-06 21:15:29,219 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2023-11-06 21:15:29,219 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 220 flow [2023-11-06 21:15:29,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 538.4545454545455) internal successors, (5923), 11 states have internal predecessors, (5923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:29,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:29,221 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2023-11-06 21:15:29,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 21:15:29,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:29,427 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:15:29,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:29,427 INFO L85 PathProgramCache]: Analyzing trace with hash 142236004, now seen corresponding path program 2 times [2023-11-06 21:15:29,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:29,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122367421] [2023-11-06 21:15:29,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:29,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:15:30,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:30,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122367421] [2023-11-06 21:15:30,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122367421] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:30,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866515901] [2023-11-06 21:15:30,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:15:30,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:30,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:30,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:30,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:15:30,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 21:15:30,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:15:30,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 21:15:30,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:30,251 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 21:15:30,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:30,260 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 21:15:30,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:30,326 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 21:15:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:15:30,363 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:15:30,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866515901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:30,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:15:30,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2023-11-06 21:15:30,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244063106] [2023-11-06 21:15:30,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:30,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:15:30,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:30,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:15:30,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:15:30,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 545 out of 1360 [2023-11-06 21:15:30,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 546.25) internal successors, (2185), 4 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:30,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:30,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 545 of 1360 [2023-11-06 21:15:30,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:31,048 INFO L124 PetriNetUnfolderBase]: 1415/2211 cut-off events. [2023-11-06 21:15:31,048 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 21:15:31,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4488 conditions, 2211 events. 1415/2211 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 10887 event pairs, 1106 based on Foata normal form. 0/731 useless extension candidates. Maximal degree in co-relation 4427. Up to 2211 conditions per place. [2023-11-06 21:15:31,059 INFO L140 encePairwiseOnDemand]: 1357/1360 looper letters, 66 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-11-06 21:15:31,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 67 transitions, 345 flow [2023-11-06 21:15:31,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:15:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:15:31,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1694 transitions. [2023-11-06 21:15:31,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4151960784313726 [2023-11-06 21:15:31,067 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1694 transitions. [2023-11-06 21:15:31,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1694 transitions. [2023-11-06 21:15:31,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:31,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1694 transitions. [2023-11-06 21:15:31,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 564.6666666666666) internal successors, (1694), 3 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:31,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1360.0) internal successors, (5440), 4 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:31,083 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1360.0) internal successors, (5440), 4 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:31,083 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 220 flow. Second operand 3 states and 1694 transitions. [2023-11-06 21:15:31,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 67 transitions, 345 flow [2023-11-06 21:15:31,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 67 transitions, 325 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-06 21:15:31,086 INFO L231 Difference]: Finished difference. Result has 62 places, 67 transitions, 193 flow [2023-11-06 21:15:31,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=193, PETRI_PLACES=62, PETRI_TRANSITIONS=67} [2023-11-06 21:15:31,087 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -12 predicate places. [2023-11-06 21:15:31,087 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 67 transitions, 193 flow [2023-11-06 21:15:31,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 546.25) internal successors, (2185), 4 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:31,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:31,088 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2023-11-06 21:15:31,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:31,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 21:15:31,294 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:15:31,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:31,294 INFO L85 PathProgramCache]: Analyzing trace with hash 142236006, now seen corresponding path program 1 times [2023-11-06 21:15:31,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:31,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240057791] [2023-11-06 21:15:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:31,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 21:15:31,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:31,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240057791] [2023-11-06 21:15:31,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240057791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:31,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:31,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:15:31,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459439697] [2023-11-06 21:15:31,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:31,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:15:31,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:31,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:15:31,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:15:31,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 533 out of 1360 [2023-11-06 21:15:31,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 67 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 534.2) internal successors, (2671), 5 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:31,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:31,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 533 of 1360 [2023-11-06 21:15:31,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:32,133 INFO L124 PetriNetUnfolderBase]: 923/1502 cut-off events. [2023-11-06 21:15:32,133 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-06 21:15:32,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3060 conditions, 1502 events. 923/1502 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7307 event pairs, 707 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 3050. Up to 1488 conditions per place. [2023-11-06 21:15:32,141 INFO L140 encePairwiseOnDemand]: 1356/1360 looper letters, 63 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-06 21:15:32,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 314 flow [2023-11-06 21:15:32,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:15:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:15:32,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2189 transitions. [2023-11-06 21:15:32,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40238970588235295 [2023-11-06 21:15:32,150 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2189 transitions. [2023-11-06 21:15:32,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2189 transitions. [2023-11-06 21:15:32,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:32,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2189 transitions. [2023-11-06 21:15:32,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 547.25) internal successors, (2189), 4 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:32,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1360.0) internal successors, (6800), 5 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:32,169 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1360.0) internal successors, (6800), 5 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:32,169 INFO L175 Difference]: Start difference. First operand has 62 places, 67 transitions, 193 flow. Second operand 4 states and 2189 transitions. [2023-11-06 21:15:32,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 314 flow [2023-11-06 21:15:32,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 313 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:15:32,172 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 187 flow [2023-11-06 21:15:32,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2023-11-06 21:15:32,173 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -12 predicate places. [2023-11-06 21:15:32,173 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 187 flow [2023-11-06 21:15:32,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 534.2) internal successors, (2671), 5 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:32,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:32,174 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-11-06 21:15:32,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:15:32,174 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:15:32,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:32,174 INFO L85 PathProgramCache]: Analyzing trace with hash -750096093, now seen corresponding path program 1 times [2023-11-06 21:15:32,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:32,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999404086] [2023-11-06 21:15:32,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:32,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:15:32,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:32,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999404086] [2023-11-06 21:15:32,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999404086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:32,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:32,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:15:32,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670219462] [2023-11-06 21:15:32,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:32,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:15:32,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:32,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:15:32,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:15:32,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 539 out of 1360 [2023-11-06 21:15:32,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 187 flow. Second operand has 4 states, 4 states have (on average 540.75) internal successors, (2163), 4 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:32,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:32,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 539 of 1360 [2023-11-06 21:15:32,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:32,957 INFO L124 PetriNetUnfolderBase]: 885/1431 cut-off events. [2023-11-06 21:15:32,957 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-06 21:15:32,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2920 conditions, 1431 events. 885/1431 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 6751 event pairs, 676 based on Foata normal form. 0/591 useless extension candidates. Maximal degree in co-relation 2909. Up to 1417 conditions per place. [2023-11-06 21:15:32,964 INFO L140 encePairwiseOnDemand]: 1356/1360 looper letters, 61 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-11-06 21:15:32,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 63 transitions, 309 flow [2023-11-06 21:15:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:15:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:15:32,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2211 transitions. [2023-11-06 21:15:32,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40643382352941176 [2023-11-06 21:15:32,974 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2211 transitions. [2023-11-06 21:15:32,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2211 transitions. [2023-11-06 21:15:32,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:32,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2211 transitions. [2023-11-06 21:15:32,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 552.75) internal successors, (2211), 4 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:32,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1360.0) internal successors, (6800), 5 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:32,995 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1360.0) internal successors, (6800), 5 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:32,996 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 187 flow. Second operand 4 states and 2211 transitions. [2023-11-06 21:15:32,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 63 transitions, 309 flow [2023-11-06 21:15:32,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 63 transitions, 306 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:15:32,998 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 184 flow [2023-11-06 21:15:32,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2023-11-06 21:15:32,999 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -13 predicate places. [2023-11-06 21:15:32,999 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 184 flow [2023-11-06 21:15:33,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 540.75) internal successors, (2163), 4 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:33,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:33,001 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-11-06 21:15:33,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 21:15:33,001 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:15:33,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:33,002 INFO L85 PathProgramCache]: Analyzing trace with hash -750096094, now seen corresponding path program 1 times [2023-11-06 21:15:33,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:33,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388411002] [2023-11-06 21:15:33,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:33,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 21:15:33,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:33,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388411002] [2023-11-06 21:15:33,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388411002] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:33,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:33,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:15:33,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159834839] [2023-11-06 21:15:33,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:33,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:15:33,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:33,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:15:33,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:15:33,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 533 out of 1360 [2023-11-06 21:15:33,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 534.6) internal successors, (2673), 5 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:33,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:33,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 533 of 1360 [2023-11-06 21:15:33,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:33,756 INFO L124 PetriNetUnfolderBase]: 847/1360 cut-off events. [2023-11-06 21:15:33,756 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-06 21:15:33,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2779 conditions, 1360 events. 847/1360 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 6259 event pairs, 645 based on Foata normal form. 0/580 useless extension candidates. Maximal degree in co-relation 2768. Up to 1346 conditions per place. [2023-11-06 21:15:33,763 INFO L140 encePairwiseOnDemand]: 1356/1360 looper letters, 59 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-11-06 21:15:33,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 302 flow [2023-11-06 21:15:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:15:33,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:15:33,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2185 transitions. [2023-11-06 21:15:33,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4016544117647059 [2023-11-06 21:15:33,772 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2185 transitions. [2023-11-06 21:15:33,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2185 transitions. [2023-11-06 21:15:33,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:33,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2185 transitions. [2023-11-06 21:15:33,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 546.25) internal successors, (2185), 4 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:33,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1360.0) internal successors, (6800), 5 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:33,788 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1360.0) internal successors, (6800), 5 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:33,789 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 184 flow. Second operand 4 states and 2185 transitions. [2023-11-06 21:15:33,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 302 flow [2023-11-06 21:15:33,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 61 transitions, 299 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:15:33,791 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 181 flow [2023-11-06 21:15:33,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-11-06 21:15:33,792 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -14 predicate places. [2023-11-06 21:15:33,792 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 181 flow [2023-11-06 21:15:33,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 534.6) internal successors, (2673), 5 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:33,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:33,793 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:33,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 21:15:33,794 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:15:33,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:33,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1778136369, now seen corresponding path program 1 times [2023-11-06 21:15:33,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:33,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803256616] [2023-11-06 21:15:33,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:33,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 21:15:34,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:34,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803256616] [2023-11-06 21:15:34,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803256616] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:34,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892307976] [2023-11-06 21:15:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:34,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:34,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:34,271 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:34,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:15:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:34,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 21:15:34,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:34,487 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 21:15:34,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:34,497 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:15:34,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:34,508 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:15:34,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:34,513 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:15:34,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:34,524 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:15:34,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:34,534 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 21:15:34,704 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-06 21:15:34,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-06 21:15:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:15:34,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:15:35,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892307976] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:35,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:15:35,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 21 [2023-11-06 21:15:35,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574314399] [2023-11-06 21:15:35,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:35,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:15:35,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:35,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:15:35,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2023-11-06 21:15:36,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 521 out of 1360 [2023-11-06 21:15:36,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 181 flow. Second operand has 10 states, 10 states have (on average 522.2) internal successors, (5222), 10 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:36,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:36,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 521 of 1360 [2023-11-06 21:15:36,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:37,071 INFO L124 PetriNetUnfolderBase]: 958/1511 cut-off events. [2023-11-06 21:15:37,072 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-06 21:15:37,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3083 conditions, 1511 events. 958/1511 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 7544 event pairs, 132 based on Foata normal form. 0/639 useless extension candidates. Maximal degree in co-relation 3072. Up to 1200 conditions per place. [2023-11-06 21:15:37,081 INFO L140 encePairwiseOnDemand]: 1348/1360 looper letters, 73 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2023-11-06 21:15:37,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 390 flow [2023-11-06 21:15:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:15:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:15:37,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3201 transitions. [2023-11-06 21:15:37,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3922794117647059 [2023-11-06 21:15:37,095 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3201 transitions. [2023-11-06 21:15:37,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3201 transitions. [2023-11-06 21:15:37,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:37,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3201 transitions. [2023-11-06 21:15:37,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 533.5) internal successors, (3201), 6 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:37,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1360.0) internal successors, (9520), 7 states have internal predecessors, (9520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:37,118 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1360.0) internal successors, (9520), 7 states have internal predecessors, (9520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:37,119 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 181 flow. Second operand 6 states and 3201 transitions. [2023-11-06 21:15:37,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 390 flow [2023-11-06 21:15:37,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 387 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:15:37,122 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 223 flow [2023-11-06 21:15:37,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2023-11-06 21:15:37,123 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -11 predicate places. [2023-11-06 21:15:37,124 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 223 flow [2023-11-06 21:15:37,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 522.2) internal successors, (5222), 10 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:37,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:37,125 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:37,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:37,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:15:37,331 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:15:37,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:37,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1778136372, now seen corresponding path program 1 times [2023-11-06 21:15:37,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:37,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197114754] [2023-11-06 21:15:37,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:37,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:15:37,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:37,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197114754] [2023-11-06 21:15:37,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197114754] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:37,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571881009] [2023-11-06 21:15:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:37,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:37,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:37,707 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:37,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:15:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:37,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:15:37,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:15:38,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:38,122 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-06 21:15:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:15:38,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571881009] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:38,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:15:38,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 21:15:38,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946961912] [2023-11-06 21:15:38,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:38,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:15:38,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:38,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:15:38,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:15:40,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 521 out of 1360 [2023-11-06 21:15:40,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 223 flow. Second operand has 25 states, 25 states have (on average 522.28) internal successors, (13057), 25 states have internal predecessors, (13057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:40,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:40,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 521 of 1360 [2023-11-06 21:15:40,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:41,524 INFO L124 PetriNetUnfolderBase]: 1968/3141 cut-off events. [2023-11-06 21:15:41,524 INFO L125 PetriNetUnfolderBase]: For 209/209 co-relation queries the response was YES. [2023-11-06 21:15:41,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6917 conditions, 3141 events. 1968/3141 cut-off events. For 209/209 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 15379 event pairs, 591 based on Foata normal form. 0/1593 useless extension candidates. Maximal degree in co-relation 6904. Up to 1184 conditions per place. [2023-11-06 21:15:41,544 INFO L140 encePairwiseOnDemand]: 1346/1360 looper letters, 115 selfloop transitions, 17 changer transitions 0/132 dead transitions. [2023-11-06 21:15:41,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 132 transitions, 651 flow [2023-11-06 21:15:41,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 21:15:41,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 21:15:41,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 5348 transitions. [2023-11-06 21:15:41,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39323529411764707 [2023-11-06 21:15:41,559 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 5348 transitions. [2023-11-06 21:15:41,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 5348 transitions. [2023-11-06 21:15:41,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:41,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 5348 transitions. [2023-11-06 21:15:41,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 534.8) internal successors, (5348), 10 states have internal predecessors, (5348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:41,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 1360.0) internal successors, (14960), 11 states have internal predecessors, (14960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:41,597 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 1360.0) internal successors, (14960), 11 states have internal predecessors, (14960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:41,597 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 223 flow. Second operand 10 states and 5348 transitions. [2023-11-06 21:15:41,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 132 transitions, 651 flow [2023-11-06 21:15:41,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 132 transitions, 635 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 21:15:41,601 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 293 flow [2023-11-06 21:15:41,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=293, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2023-11-06 21:15:41,602 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2023-11-06 21:15:41,603 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 293 flow [2023-11-06 21:15:41,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 522.28) internal successors, (13057), 25 states have internal predecessors, (13057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:41,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:41,605 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:41,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:41,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 21:15:41,811 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:15:41,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:41,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1778136370, now seen corresponding path program 1 times [2023-11-06 21:15:41,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:41,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774245494] [2023-11-06 21:15:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:41,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 21:15:41,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:41,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774245494] [2023-11-06 21:15:41,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774245494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:41,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:41,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:15:41,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253939651] [2023-11-06 21:15:41,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:41,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:15:41,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:41,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:15:41,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:15:42,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 523 out of 1360 [2023-11-06 21:15:42,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 293 flow. Second operand has 4 states, 4 states have (on average 525.25) internal successors, (2101), 4 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:42,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:42,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 523 of 1360 [2023-11-06 21:15:42,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:42,678 INFO L124 PetriNetUnfolderBase]: 1441/2282 cut-off events. [2023-11-06 21:15:42,679 INFO L125 PetriNetUnfolderBase]: For 481/481 co-relation queries the response was YES. [2023-11-06 21:15:42,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5415 conditions, 2282 events. 1441/2282 cut-off events. For 481/481 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 10485 event pairs, 1057 based on Foata normal form. 54/1368 useless extension candidates. Maximal degree in co-relation 5399. Up to 2268 conditions per place. [2023-11-06 21:15:42,695 INFO L140 encePairwiseOnDemand]: 1353/1360 looper letters, 59 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-11-06 21:15:42,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 61 transitions, 398 flow [2023-11-06 21:15:42,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:15:42,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:15:42,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2141 transitions. [2023-11-06 21:15:42,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935661764705882 [2023-11-06 21:15:42,702 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2141 transitions. [2023-11-06 21:15:42,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2141 transitions. [2023-11-06 21:15:42,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:42,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2141 transitions. [2023-11-06 21:15:42,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 535.25) internal successors, (2141), 4 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:42,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1360.0) internal successors, (6800), 5 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:42,714 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1360.0) internal successors, (6800), 5 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:42,714 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 293 flow. Second operand 4 states and 2141 transitions. [2023-11-06 21:15:42,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 61 transitions, 398 flow [2023-11-06 21:15:42,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 377 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 21:15:42,718 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 259 flow [2023-11-06 21:15:42,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=259, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2023-11-06 21:15:42,720 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -11 predicate places. [2023-11-06 21:15:42,720 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 259 flow [2023-11-06 21:15:42,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 525.25) internal successors, (2101), 4 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:42,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:42,721 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:42,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 21:15:42,721 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:15:42,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:42,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1778136367, now seen corresponding path program 1 times [2023-11-06 21:15:42,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:42,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239643295] [2023-11-06 21:15:42,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:42,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-06 21:15:42,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:42,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239643295] [2023-11-06 21:15:42,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239643295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:42,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:42,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:15:42,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565418421] [2023-11-06 21:15:42,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:42,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:15:42,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:42,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:15:42,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:15:43,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 523 out of 1360 [2023-11-06 21:15:43,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 259 flow. Second operand has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:43,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:43,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 523 of 1360 [2023-11-06 21:15:43,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:43,575 INFO L124 PetriNetUnfolderBase]: 933/1464 cut-off events. [2023-11-06 21:15:43,575 INFO L125 PetriNetUnfolderBase]: For 371/371 co-relation queries the response was YES. [2023-11-06 21:15:43,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3594 conditions, 1464 events. 933/1464 cut-off events. For 371/371 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5701 event pairs, 629 based on Foata normal form. 0/968 useless extension candidates. Maximal degree in co-relation 3578. Up to 1450 conditions per place. [2023-11-06 21:15:43,585 INFO L140 encePairwiseOnDemand]: 1352/1360 looper letters, 53 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-11-06 21:15:43,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 361 flow [2023-11-06 21:15:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:15:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:15:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2659 transitions. [2023-11-06 21:15:43,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3910294117647059 [2023-11-06 21:15:43,593 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2659 transitions. [2023-11-06 21:15:43,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2659 transitions. [2023-11-06 21:15:43,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:43,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2659 transitions. [2023-11-06 21:15:43,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 531.8) internal successors, (2659), 5 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:43,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1360.0) internal successors, (8160), 6 states have internal predecessors, (8160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:43,608 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1360.0) internal successors, (8160), 6 states have internal predecessors, (8160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:43,608 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 259 flow. Second operand 5 states and 2659 transitions. [2023-11-06 21:15:43,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 361 flow [2023-11-06 21:15:43,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 56 transitions, 358 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:15:43,612 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 252 flow [2023-11-06 21:15:43,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=252, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2023-11-06 21:15:43,613 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -14 predicate places. [2023-11-06 21:15:43,613 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 252 flow [2023-11-06 21:15:43,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 525.0) internal successors, (2625), 5 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:43,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:43,614 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:43,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 21:15:43,614 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:15:43,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:43,615 INFO L85 PathProgramCache]: Analyzing trace with hash 603836502, now seen corresponding path program 1 times [2023-11-06 21:15:43,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:43,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528627207] [2023-11-06 21:15:43,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:43,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 21:15:43,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:43,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528627207] [2023-11-06 21:15:43,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528627207] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:43,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034647204] [2023-11-06 21:15:43,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:43,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:43,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:43,988 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:44,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:15:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:44,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 21:15:44,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:44,198 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 21:15:44,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:44,204 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:15:44,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:44,209 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:15:44,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:44,215 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:15:44,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:44,224 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 21:15:44,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:44,230 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:15:44,363 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-06 21:15:44,363 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-06 21:15:44,490 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:15:44,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:15:44,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034647204] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:44,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:15:44,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 21 [2023-11-06 21:15:44,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489381417] [2023-11-06 21:15:44,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:44,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:15:44,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:44,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:15:44,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-11-06 21:15:46,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 521 out of 1360 [2023-11-06 21:15:46,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 252 flow. Second operand has 10 states, 10 states have (on average 522.4) internal successors, (5224), 10 states have internal predecessors, (5224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:46,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:46,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 521 of 1360 [2023-11-06 21:15:46,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:46,823 INFO L124 PetriNetUnfolderBase]: 1317/2076 cut-off events. [2023-11-06 21:15:46,823 INFO L125 PetriNetUnfolderBase]: For 790/790 co-relation queries the response was YES. [2023-11-06 21:15:46,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5072 conditions, 2076 events. 1317/2076 cut-off events. For 790/790 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9333 event pairs, 629 based on Foata normal form. 0/1378 useless extension candidates. Maximal degree in co-relation 5056. Up to 1450 conditions per place. [2023-11-06 21:15:46,836 INFO L140 encePairwiseOnDemand]: 1353/1360 looper letters, 85 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2023-11-06 21:15:46,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 575 flow [2023-11-06 21:15:46,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:15:46,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:15:46,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3194 transitions. [2023-11-06 21:15:46,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391421568627451 [2023-11-06 21:15:46,845 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3194 transitions. [2023-11-06 21:15:46,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3194 transitions. [2023-11-06 21:15:46,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:46,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3194 transitions. [2023-11-06 21:15:46,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 532.3333333333334) internal successors, (3194), 6 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:46,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1360.0) internal successors, (9520), 7 states have internal predecessors, (9520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:46,862 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1360.0) internal successors, (9520), 7 states have internal predecessors, (9520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:46,862 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 252 flow. Second operand 6 states and 3194 transitions. [2023-11-06 21:15:46,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 575 flow [2023-11-06 21:15:46,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 570 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 21:15:46,867 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 267 flow [2023-11-06 21:15:46,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-11-06 21:15:46,868 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -11 predicate places. [2023-11-06 21:15:46,868 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 267 flow [2023-11-06 21:15:46,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 522.4) internal successors, (5224), 10 states have internal predecessors, (5224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:46,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:46,869 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:46,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:47,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 21:15:47,075 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:15:47,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:47,076 INFO L85 PathProgramCache]: Analyzing trace with hash 603836430, now seen corresponding path program 1 times [2023-11-06 21:15:47,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:47,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236682589] [2023-11-06 21:15:47,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:47,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:15:47,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:47,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236682589] [2023-11-06 21:15:47,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236682589] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:47,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391424061] [2023-11-06 21:15:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:47,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:47,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:47,527 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:47,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:15:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:47,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:15:47,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:15:47,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:47,984 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-06 21:15:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:15:48,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391424061] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:48,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:15:48,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 21:15:48,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833552482] [2023-11-06 21:15:48,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:48,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:15:48,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:48,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:15:48,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:15:50,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 519 out of 1360 [2023-11-06 21:15:50,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 267 flow. Second operand has 25 states, 25 states have (on average 520.52) internal successors, (13013), 25 states have internal predecessors, (13013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:50,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:50,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 519 of 1360 [2023-11-06 21:15:50,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:51,644 INFO L124 PetriNetUnfolderBase]: 1593/2432 cut-off events. [2023-11-06 21:15:51,645 INFO L125 PetriNetUnfolderBase]: For 1344/1344 co-relation queries the response was YES. [2023-11-06 21:15:51,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6536 conditions, 2432 events. 1593/2432 cut-off events. For 1344/1344 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 10693 event pairs, 417 based on Foata normal form. 0/1864 useless extension candidates. Maximal degree in co-relation 6519. Up to 1046 conditions per place. [2023-11-06 21:15:51,663 INFO L140 encePairwiseOnDemand]: 1350/1360 looper letters, 108 selfloop transitions, 16 changer transitions 0/124 dead transitions. [2023-11-06 21:15:51,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 124 transitions, 805 flow [2023-11-06 21:15:51,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 21:15:51,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 21:15:51,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 5293 transitions. [2023-11-06 21:15:51,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38919117647058826 [2023-11-06 21:15:51,677 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 5293 transitions. [2023-11-06 21:15:51,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 5293 transitions. [2023-11-06 21:15:51,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:51,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 5293 transitions. [2023-11-06 21:15:51,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 529.3) internal successors, (5293), 10 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:51,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 1360.0) internal successors, (14960), 11 states have internal predecessors, (14960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:51,700 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 1360.0) internal successors, (14960), 11 states have internal predecessors, (14960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:51,700 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 267 flow. Second operand 10 states and 5293 transitions. [2023-11-06 21:15:51,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 124 transitions, 805 flow [2023-11-06 21:15:51,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 124 transitions, 797 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 21:15:51,759 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 324 flow [2023-11-06 21:15:51,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=324, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2023-11-06 21:15:51,759 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2023-11-06 21:15:51,759 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 324 flow [2023-11-06 21:15:51,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 520.52) internal successors, (13013), 25 states have internal predecessors, (13013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:51,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:51,761 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:51,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:51,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 21:15:51,962 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:15:51,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:51,962 INFO L85 PathProgramCache]: Analyzing trace with hash 466375286, now seen corresponding path program 1 times [2023-11-06 21:15:51,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:51,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612771920] [2023-11-06 21:15:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:51,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-06 21:15:52,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:52,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612771920] [2023-11-06 21:15:52,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612771920] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:52,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628728592] [2023-11-06 21:15:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:52,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:52,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:52,627 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:52,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:15:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:52,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 21:15:52,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:52,893 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 21:15:52,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:52,901 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:15:52,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:52,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:15:52,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:52,922 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:15:52,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:52,932 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:15:52,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:52,936 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:15:53,076 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-06 21:15:53,076 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-06 21:15:53,332 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-06 21:15:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:15:53,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:53,528 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 64 [2023-11-06 21:15:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:15:54,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628728592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:54,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:15:54,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 25 [2023-11-06 21:15:54,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072568836] [2023-11-06 21:15:54,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:54,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 21:15:54,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:54,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 21:15:54,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2023-11-06 21:16:02,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 509 out of 1360 [2023-11-06 21:16:02,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 324 flow. Second operand has 27 states, 27 states have (on average 510.6666666666667) internal successors, (13788), 27 states have internal predecessors, (13788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:02,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:02,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 509 of 1360 [2023-11-06 21:16:02,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:04,978 INFO L124 PetriNetUnfolderBase]: 2341/3716 cut-off events. [2023-11-06 21:16:04,978 INFO L125 PetriNetUnfolderBase]: For 3220/3220 co-relation queries the response was YES. [2023-11-06 21:16:04,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10887 conditions, 3716 events. 2341/3716 cut-off events. For 3220/3220 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 18635 event pairs, 417 based on Foata normal form. 370/3762 useless extension candidates. Maximal degree in co-relation 10867. Up to 1046 conditions per place. [2023-11-06 21:16:05,005 INFO L140 encePairwiseOnDemand]: 1351/1360 looper letters, 203 selfloop transitions, 19 changer transitions 0/222 dead transitions. [2023-11-06 21:16:05,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 222 transitions, 1471 flow [2023-11-06 21:16:05,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 21:16:05,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 21:16:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 10370 transitions. [2023-11-06 21:16:05,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2023-11-06 21:16:05,032 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 10370 transitions. [2023-11-06 21:16:05,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 10370 transitions. [2023-11-06 21:16:05,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:05,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 10370 transitions. [2023-11-06 21:16:05,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 518.5) internal successors, (10370), 20 states have internal predecessors, (10370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:05,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 1360.0) internal successors, (28560), 21 states have internal predecessors, (28560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:05,079 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 1360.0) internal successors, (28560), 21 states have internal predecessors, (28560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:05,079 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 324 flow. Second operand 20 states and 10370 transitions. [2023-11-06 21:16:05,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 222 transitions, 1471 flow [2023-11-06 21:16:05,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 222 transitions, 1440 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-11-06 21:16:05,090 INFO L231 Difference]: Finished difference. Result has 79 places, 59 transitions, 323 flow [2023-11-06 21:16:05,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=323, PETRI_PLACES=79, PETRI_TRANSITIONS=59} [2023-11-06 21:16:05,091 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2023-11-06 21:16:05,091 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 59 transitions, 323 flow [2023-11-06 21:16:05,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 510.6666666666667) internal successors, (13788), 27 states have internal predecessors, (13788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:05,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:05,093 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:05,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:05,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:05,300 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:16:05,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:05,301 INFO L85 PathProgramCache]: Analyzing trace with hash 466375214, now seen corresponding path program 1 times [2023-11-06 21:16:05,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:05,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129819881] [2023-11-06 21:16:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:05,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 21:16:05,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:05,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129819881] [2023-11-06 21:16:05,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129819881] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:05,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401694040] [2023-11-06 21:16:05,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:05,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:05,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:05,992 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:06,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:16:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:06,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:16:06,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:16:06,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:06,645 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 64 [2023-11-06 21:16:06,745 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-11-06 21:16:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:16:06,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401694040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:06,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:06,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 29 [2023-11-06 21:16:06,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464794137] [2023-11-06 21:16:06,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:06,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 21:16:06,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:06,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 21:16:06,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:16:10,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 521 out of 1360 [2023-11-06 21:16:10,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 59 transitions, 323 flow. Second operand has 30 states, 30 states have (on average 522.4666666666667) internal successors, (15674), 30 states have internal predecessors, (15674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:10,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:10,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 521 of 1360 [2023-11-06 21:16:10,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:11,895 INFO L124 PetriNetUnfolderBase]: 1883/3042 cut-off events. [2023-11-06 21:16:11,895 INFO L125 PetriNetUnfolderBase]: For 2151/2151 co-relation queries the response was YES. [2023-11-06 21:16:11,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8918 conditions, 3042 events. 1883/3042 cut-off events. For 2151/2151 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 14891 event pairs, 205 based on Foata normal form. 296/3068 useless extension candidates. Maximal degree in co-relation 8899. Up to 518 conditions per place. [2023-11-06 21:16:11,910 INFO L140 encePairwiseOnDemand]: 1352/1360 looper letters, 232 selfloop transitions, 17 changer transitions 0/249 dead transitions. [2023-11-06 21:16:11,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 249 transitions, 1647 flow [2023-11-06 21:16:11,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 21:16:11,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 21:16:11,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 7496 transitions. [2023-11-06 21:16:11,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3936974789915966 [2023-11-06 21:16:11,922 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 7496 transitions. [2023-11-06 21:16:11,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 7496 transitions. [2023-11-06 21:16:11,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:11,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 7496 transitions. [2023-11-06 21:16:11,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 535.4285714285714) internal successors, (7496), 14 states have internal predecessors, (7496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:11,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 1360.0) internal successors, (20400), 15 states have internal predecessors, (20400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:11,953 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 1360.0) internal successors, (20400), 15 states have internal predecessors, (20400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:11,954 INFO L175 Difference]: Start difference. First operand has 79 places, 59 transitions, 323 flow. Second operand 14 states and 7496 transitions. [2023-11-06 21:16:11,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 249 transitions, 1647 flow [2023-11-06 21:16:11,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 249 transitions, 1572 flow, removed 18 selfloop flow, removed 13 redundant places. [2023-11-06 21:16:11,966 INFO L231 Difference]: Finished difference. Result has 78 places, 58 transitions, 276 flow [2023-11-06 21:16:11,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=276, PETRI_PLACES=78, PETRI_TRANSITIONS=58} [2023-11-06 21:16:11,966 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2023-11-06 21:16:11,966 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 58 transitions, 276 flow [2023-11-06 21:16:11,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 522.4666666666667) internal successors, (15674), 30 states have internal predecessors, (15674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:11,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:11,969 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:11,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:12,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:12,174 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:16:12,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:12,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1283657161, now seen corresponding path program 1 times [2023-11-06 21:16:12,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:12,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820143] [2023-11-06 21:16:12,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:12,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 21:16:12,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:12,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820143] [2023-11-06 21:16:12,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:12,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877663935] [2023-11-06 21:16:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:12,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:12,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:12,606 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:12,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:16:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:12,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:16:12,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:16:13,003 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:16:13,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877663935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:16:13,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:16:13,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-06 21:16:13,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605638892] [2023-11-06 21:16:13,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:16:13,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:16:13,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:13,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:16:13,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:16:13,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 519 out of 1360 [2023-11-06 21:16:13,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 58 transitions, 276 flow. Second operand has 5 states, 5 states have (on average 521.6) internal successors, (2608), 5 states have internal predecessors, (2608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:13,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:13,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 519 of 1360 [2023-11-06 21:16:13,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:14,216 INFO L124 PetriNetUnfolderBase]: 2381/3838 cut-off events. [2023-11-06 21:16:14,216 INFO L125 PetriNetUnfolderBase]: For 2585/2585 co-relation queries the response was YES. [2023-11-06 21:16:14,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10570 conditions, 3838 events. 2381/3838 cut-off events. For 2585/2585 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 19634 event pairs, 1225 based on Foata normal form. 0/3508 useless extension candidates. Maximal degree in co-relation 10555. Up to 2618 conditions per place. [2023-11-06 21:16:14,243 INFO L140 encePairwiseOnDemand]: 1351/1360 looper letters, 102 selfloop transitions, 13 changer transitions 0/115 dead transitions. [2023-11-06 21:16:14,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 115 transitions, 727 flow [2023-11-06 21:16:14,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:16:14,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:16:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2676 transitions. [2023-11-06 21:16:14,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935294117647059 [2023-11-06 21:16:14,249 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2676 transitions. [2023-11-06 21:16:14,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2676 transitions. [2023-11-06 21:16:14,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:14,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2676 transitions. [2023-11-06 21:16:14,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 535.2) internal successors, (2676), 5 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:14,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1360.0) internal successors, (8160), 6 states have internal predecessors, (8160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:14,262 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1360.0) internal successors, (8160), 6 states have internal predecessors, (8160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:14,262 INFO L175 Difference]: Start difference. First operand has 78 places, 58 transitions, 276 flow. Second operand 5 states and 2676 transitions. [2023-11-06 21:16:14,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 115 transitions, 727 flow [2023-11-06 21:16:14,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 115 transitions, 661 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-06 21:16:14,269 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 341 flow [2023-11-06 21:16:14,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=341, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2023-11-06 21:16:14,270 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2023-11-06 21:16:14,271 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 341 flow [2023-11-06 21:16:14,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 521.6) internal successors, (2608), 5 states have internal predecessors, (2608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:14,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:14,271 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:14,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:14,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:14,477 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:16:14,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:14,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1041987949, now seen corresponding path program 1 times [2023-11-06 21:16:14,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:14,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279915734] [2023-11-06 21:16:14,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:14,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 21:16:14,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:14,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279915734] [2023-11-06 21:16:14,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279915734] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:14,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271382994] [2023-11-06 21:16:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:14,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:14,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:14,967 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:14,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:16:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:15,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:16:15,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:15,436 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-06 21:16:15,441 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 6 [2023-11-06 21:16:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:16:15,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:16:15,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271382994] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:15,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:16:15,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 15 [2023-11-06 21:16:15,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701223566] [2023-11-06 21:16:15,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:16:15,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:16:15,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:15,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:16:15,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-11-06 21:16:16,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 535 out of 1360 [2023-11-06 21:16:16,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 341 flow. Second operand has 4 states, 4 states have (on average 538.5) internal successors, (2154), 4 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:16,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:16,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 535 of 1360 [2023-11-06 21:16:16,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:17,281 INFO L124 PetriNetUnfolderBase]: 2599/4248 cut-off events. [2023-11-06 21:16:17,281 INFO L125 PetriNetUnfolderBase]: For 3300/3300 co-relation queries the response was YES. [2023-11-06 21:16:17,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12425 conditions, 4248 events. 2599/4248 cut-off events. For 3300/3300 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 22011 event pairs, 1610 based on Foata normal form. 150/4188 useless extension candidates. Maximal degree in co-relation 12408. Up to 3253 conditions per place. [2023-11-06 21:16:17,307 INFO L140 encePairwiseOnDemand]: 1354/1360 looper letters, 84 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2023-11-06 21:16:17,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 87 transitions, 591 flow [2023-11-06 21:16:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:16:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:16:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1658 transitions. [2023-11-06 21:16:17,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40637254901960784 [2023-11-06 21:16:17,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1658 transitions. [2023-11-06 21:16:17,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1658 transitions. [2023-11-06 21:16:17,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:17,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1658 transitions. [2023-11-06 21:16:17,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 552.6666666666666) internal successors, (1658), 3 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:17,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1360.0) internal successors, (5440), 4 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:17,318 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1360.0) internal successors, (5440), 4 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:17,318 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 341 flow. Second operand 3 states and 1658 transitions. [2023-11-06 21:16:17,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 87 transitions, 591 flow [2023-11-06 21:16:17,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 87 transitions, 591 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 21:16:17,330 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 365 flow [2023-11-06 21:16:17,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=365, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2023-11-06 21:16:17,330 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2023-11-06 21:16:17,331 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 365 flow [2023-11-06 21:16:17,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 538.5) internal successors, (2154), 4 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:17,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:17,331 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:17,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:17,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:17,538 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:16:17,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:17,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1136411965, now seen corresponding path program 1 times [2023-11-06 21:16:17,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:17,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772736705] [2023-11-06 21:16:17,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:17,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 21:16:18,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:18,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772736705] [2023-11-06 21:16:18,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772736705] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:18,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688117698] [2023-11-06 21:16:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:18,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:18,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:18,129 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:18,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:16:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:18,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 21:16:18,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:18,393 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 21:16:18,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:16:18,399 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:16:18,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:16:18,405 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:16:18,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:16:18,413 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 21:16:18,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:16:18,419 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 21:16:18,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:16:18,423 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 21:16:18,571 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-06 21:16:18,572 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-06 21:16:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:16:18,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:18,935 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 108 [2023-11-06 21:16:18,943 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 106 [2023-11-06 21:16:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:16:19,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688117698] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:19,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:19,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-11-06 21:16:19,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210187176] [2023-11-06 21:16:19,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:19,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 21:16:19,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:19,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 21:16:19,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2023-11-06 21:16:26,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 506 out of 1360 [2023-11-06 21:16:26,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 365 flow. Second operand has 27 states, 27 states have (on average 507.9259259259259) internal successors, (13714), 27 states have internal predecessors, (13714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:26,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:26,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 506 of 1360 [2023-11-06 21:16:26,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:29,519 INFO L124 PetriNetUnfolderBase]: 4245/6878 cut-off events. [2023-11-06 21:16:29,519 INFO L125 PetriNetUnfolderBase]: For 5939/5939 co-relation queries the response was YES. [2023-11-06 21:16:29,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21199 conditions, 6878 events. 4245/6878 cut-off events. For 5939/5939 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 36230 event pairs, 508 based on Foata normal form. 90/6638 useless extension candidates. Maximal degree in co-relation 21180. Up to 1864 conditions per place. [2023-11-06 21:16:29,550 INFO L140 encePairwiseOnDemand]: 1348/1360 looper letters, 165 selfloop transitions, 27 changer transitions 0/192 dead transitions. [2023-11-06 21:16:29,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 192 transitions, 1280 flow [2023-11-06 21:16:29,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 21:16:29,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 21:16:29,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 10265 transitions. [2023-11-06 21:16:29,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37738970588235293 [2023-11-06 21:16:29,562 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 10265 transitions. [2023-11-06 21:16:29,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 10265 transitions. [2023-11-06 21:16:29,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:29,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 10265 transitions. [2023-11-06 21:16:29,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 513.25) internal successors, (10265), 20 states have internal predecessors, (10265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:29,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 1360.0) internal successors, (28560), 21 states have internal predecessors, (28560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:29,602 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 1360.0) internal successors, (28560), 21 states have internal predecessors, (28560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:29,603 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 365 flow. Second operand 20 states and 10265 transitions. [2023-11-06 21:16:29,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 192 transitions, 1280 flow [2023-11-06 21:16:29,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 192 transitions, 1270 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:16:29,654 INFO L231 Difference]: Finished difference. Result has 100 places, 77 transitions, 518 flow [2023-11-06 21:16:29,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=518, PETRI_PLACES=100, PETRI_TRANSITIONS=77} [2023-11-06 21:16:29,655 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 26 predicate places. [2023-11-06 21:16:29,655 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 77 transitions, 518 flow [2023-11-06 21:16:29,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 507.9259259259259) internal successors, (13714), 27 states have internal predecessors, (13714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:29,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:29,658 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:29,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:29,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:29,864 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:16:29,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:29,864 INFO L85 PathProgramCache]: Analyzing trace with hash -902860305, now seen corresponding path program 1 times [2023-11-06 21:16:29,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:29,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180949325] [2023-11-06 21:16:29,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:29,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:16:30,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:30,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180949325] [2023-11-06 21:16:30,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180949325] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:16:30,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:16:30,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:16:30,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590236539] [2023-11-06 21:16:30,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:16:30,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:16:30,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:30,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:16:30,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:16:30,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 531 out of 1360 [2023-11-06 21:16:30,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 77 transitions, 518 flow. Second operand has 4 states, 4 states have (on average 534.75) internal successors, (2139), 4 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:30,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:30,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 531 of 1360 [2023-11-06 21:16:30,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:32,365 INFO L124 PetriNetUnfolderBase]: 4240/6878 cut-off events. [2023-11-06 21:16:32,365 INFO L125 PetriNetUnfolderBase]: For 8000/8000 co-relation queries the response was YES. [2023-11-06 21:16:32,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22680 conditions, 6878 events. 4240/6878 cut-off events. For 8000/8000 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 36724 event pairs, 3307 based on Foata normal form. 5/6553 useless extension candidates. Maximal degree in co-relation 22655. Up to 6735 conditions per place. [2023-11-06 21:16:32,401 INFO L140 encePairwiseOnDemand]: 1356/1360 looper letters, 88 selfloop transitions, 1 changer transitions 7/96 dead transitions. [2023-11-06 21:16:32,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 96 transitions, 770 flow [2023-11-06 21:16:32,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:16:32,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:16:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2176 transitions. [2023-11-06 21:16:32,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-06 21:16:32,405 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2176 transitions. [2023-11-06 21:16:32,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2176 transitions. [2023-11-06 21:16:32,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:32,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2176 transitions. [2023-11-06 21:16:32,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 544.0) internal successors, (2176), 4 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:32,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1360.0) internal successors, (6800), 5 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:32,413 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1360.0) internal successors, (6800), 5 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:32,413 INFO L175 Difference]: Start difference. First operand has 100 places, 77 transitions, 518 flow. Second operand 4 states and 2176 transitions. [2023-11-06 21:16:32,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 96 transitions, 770 flow [2023-11-06 21:16:32,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 96 transitions, 738 flow, removed 1 selfloop flow, removed 14 redundant places. [2023-11-06 21:16:32,451 INFO L231 Difference]: Finished difference. Result has 91 places, 77 transitions, 495 flow [2023-11-06 21:16:32,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=495, PETRI_PLACES=91, PETRI_TRANSITIONS=77} [2023-11-06 21:16:32,452 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 17 predicate places. [2023-11-06 21:16:32,452 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 77 transitions, 495 flow [2023-11-06 21:16:32,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 534.75) internal successors, (2139), 4 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:32,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:32,453 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:32,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-06 21:16:32,453 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:16:32,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:32,454 INFO L85 PathProgramCache]: Analyzing trace with hash -438974083, now seen corresponding path program 2 times [2023-11-06 21:16:32,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:32,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154575031] [2023-11-06 21:16:32,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:32,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:16:33,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:33,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154575031] [2023-11-06 21:16:33,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154575031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:16:33,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:16:33,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:16:33,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158496531] [2023-11-06 21:16:33,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:16:33,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:16:33,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:33,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:16:33,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:16:33,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 531 out of 1360 [2023-11-06 21:16:33,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 77 transitions, 495 flow. Second operand has 4 states, 4 states have (on average 534.75) internal successors, (2139), 4 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:33,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:33,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 531 of 1360 [2023-11-06 21:16:33,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:36,187 INFO L124 PetriNetUnfolderBase]: 7102/11554 cut-off events. [2023-11-06 21:16:36,187 INFO L125 PetriNetUnfolderBase]: For 16623/16623 co-relation queries the response was YES. [2023-11-06 21:16:36,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38327 conditions, 11554 events. 7102/11554 cut-off events. For 16623/16623 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 70585 event pairs, 1263 based on Foata normal form. 1/10931 useless extension candidates. Maximal degree in co-relation 38301. Up to 6898 conditions per place. [2023-11-06 21:16:36,259 INFO L140 encePairwiseOnDemand]: 1353/1360 looper letters, 127 selfloop transitions, 13 changer transitions 1/141 dead transitions. [2023-11-06 21:16:36,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 141 transitions, 1202 flow [2023-11-06 21:16:36,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:16:36,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:16:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2197 transitions. [2023-11-06 21:16:36,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40386029411764707 [2023-11-06 21:16:36,266 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2197 transitions. [2023-11-06 21:16:36,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2197 transitions. [2023-11-06 21:16:36,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:36,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2197 transitions. [2023-11-06 21:16:36,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 549.25) internal successors, (2197), 4 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:36,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1360.0) internal successors, (6800), 5 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:36,276 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1360.0) internal successors, (6800), 5 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:36,277 INFO L175 Difference]: Start difference. First operand has 91 places, 77 transitions, 495 flow. Second operand 4 states and 2197 transitions. [2023-11-06 21:16:36,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 141 transitions, 1202 flow [2023-11-06 21:16:36,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 141 transitions, 1196 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 21:16:36,321 INFO L231 Difference]: Finished difference. Result has 94 places, 89 transitions, 624 flow [2023-11-06 21:16:36,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=624, PETRI_PLACES=94, PETRI_TRANSITIONS=89} [2023-11-06 21:16:36,322 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 20 predicate places. [2023-11-06 21:16:36,322 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 89 transitions, 624 flow [2023-11-06 21:16:36,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 534.75) internal successors, (2139), 4 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:36,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:36,323 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:36,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-06 21:16:36,323 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:16:36,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:36,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1205689956, now seen corresponding path program 1 times [2023-11-06 21:16:36,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:36,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813228714] [2023-11-06 21:16:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:36,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:16:36,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:36,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813228714] [2023-11-06 21:16:36,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813228714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:16:36,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:16:36,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:16:36,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962747560] [2023-11-06 21:16:36,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:16:36,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:16:36,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:36,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:16:36,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:16:36,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 547 out of 1360 [2023-11-06 21:16:36,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 89 transitions, 624 flow. Second operand has 3 states, 3 states have (on average 552.3333333333334) internal successors, (1657), 3 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:36,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:36,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 547 of 1360 [2023-11-06 21:16:36,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:39,867 INFO L124 PetriNetUnfolderBase]: 6876/11264 cut-off events. [2023-11-06 21:16:39,867 INFO L125 PetriNetUnfolderBase]: For 22271/22271 co-relation queries the response was YES. [2023-11-06 21:16:39,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43266 conditions, 11264 events. 6876/11264 cut-off events. For 22271/22271 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 66912 event pairs, 2054 based on Foata normal form. 188/10828 useless extension candidates. Maximal degree in co-relation 43239. Up to 11227 conditions per place. [2023-11-06 21:16:39,948 INFO L140 encePairwiseOnDemand]: 1356/1360 looper letters, 86 selfloop transitions, 3 changer transitions 5/94 dead transitions. [2023-11-06 21:16:39,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 94 transitions, 847 flow [2023-11-06 21:16:39,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:16:39,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:16:39,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1687 transitions. [2023-11-06 21:16:39,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134803921568627 [2023-11-06 21:16:39,951 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1687 transitions. [2023-11-06 21:16:39,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1687 transitions. [2023-11-06 21:16:39,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:39,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1687 transitions. [2023-11-06 21:16:39,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 562.3333333333334) internal successors, (1687), 3 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:39,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1360.0) internal successors, (5440), 4 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:39,956 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1360.0) internal successors, (5440), 4 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:39,956 INFO L175 Difference]: Start difference. First operand has 94 places, 89 transitions, 624 flow. Second operand 3 states and 1687 transitions. [2023-11-06 21:16:39,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 94 transitions, 847 flow [2023-11-06 21:16:39,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 94 transitions, 847 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 21:16:39,999 INFO L231 Difference]: Finished difference. Result has 97 places, 86 transitions, 639 flow [2023-11-06 21:16:39,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=639, PETRI_PLACES=97, PETRI_TRANSITIONS=86} [2023-11-06 21:16:40,000 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 23 predicate places. [2023-11-06 21:16:40,000 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 86 transitions, 639 flow [2023-11-06 21:16:40,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 552.3333333333334) internal successors, (1657), 3 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:40,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:40,000 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:40,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-06 21:16:40,000 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:16:40,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:40,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1841904028, now seen corresponding path program 2 times [2023-11-06 21:16:40,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:40,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266024327] [2023-11-06 21:16:40,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:40,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:16:40,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:40,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266024327] [2023-11-06 21:16:40,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266024327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:16:40,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:16:40,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:16:40,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792876728] [2023-11-06 21:16:40,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:16:40,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:16:40,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:40,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:16:40,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:16:40,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 545 out of 1360 [2023-11-06 21:16:40,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 86 transitions, 639 flow. Second operand has 3 states, 3 states have (on average 550.3333333333334) internal successors, (1651), 3 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:40,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:40,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 545 of 1360 [2023-11-06 21:16:40,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:42,623 INFO L124 PetriNetUnfolderBase]: 6755/10962 cut-off events. [2023-11-06 21:16:42,623 INFO L125 PetriNetUnfolderBase]: For 21744/21744 co-relation queries the response was YES. [2023-11-06 21:16:42,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42213 conditions, 10962 events. 6755/10962 cut-off events. For 21744/21744 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 63907 event pairs, 3870 based on Foata normal form. 2/10364 useless extension candidates. Maximal degree in co-relation 42185. Up to 10960 conditions per place. [2023-11-06 21:16:42,713 INFO L140 encePairwiseOnDemand]: 1358/1360 looper letters, 84 selfloop transitions, 0 changer transitions 2/86 dead transitions. [2023-11-06 21:16:42,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 86 transitions, 793 flow [2023-11-06 21:16:42,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:16:42,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:16:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1672 transitions. [2023-11-06 21:16:42,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40980392156862744 [2023-11-06 21:16:42,716 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1672 transitions. [2023-11-06 21:16:42,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1672 transitions. [2023-11-06 21:16:42,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:42,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1672 transitions. [2023-11-06 21:16:42,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 557.3333333333334) internal successors, (1672), 3 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:42,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1360.0) internal successors, (5440), 4 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:42,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1360.0) internal successors, (5440), 4 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:42,724 INFO L175 Difference]: Start difference. First operand has 97 places, 86 transitions, 639 flow. Second operand 3 states and 1672 transitions. [2023-11-06 21:16:42,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 86 transitions, 793 flow [2023-11-06 21:16:42,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 86 transitions, 774 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-06 21:16:42,787 INFO L231 Difference]: Finished difference. Result has 94 places, 84 transitions, 595 flow [2023-11-06 21:16:42,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=595, PETRI_PLACES=94, PETRI_TRANSITIONS=84} [2023-11-06 21:16:42,788 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 20 predicate places. [2023-11-06 21:16:42,788 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 84 transitions, 595 flow [2023-11-06 21:16:42,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 550.3333333333334) internal successors, (1651), 3 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:42,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:42,789 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:42,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-06 21:16:42,789 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:16:42,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:42,790 INFO L85 PathProgramCache]: Analyzing trace with hash -609321081, now seen corresponding path program 1 times [2023-11-06 21:16:42,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:42,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328448302] [2023-11-06 21:16:42,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:42,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:16:42,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:42,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328448302] [2023-11-06 21:16:42,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328448302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:16:42,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:16:42,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:16:42,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146894281] [2023-11-06 21:16:42,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:16:42,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:16:42,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:16:42,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:16:43,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 546 out of 1360 [2023-11-06 21:16:43,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 84 transitions, 595 flow. Second operand has 3 states, 3 states have (on average 551.6666666666666) internal successors, (1655), 3 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:43,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:43,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 546 of 1360 [2023-11-06 21:16:43,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:46,475 INFO L124 PetriNetUnfolderBase]: 6636/10719 cut-off events. [2023-11-06 21:16:46,475 INFO L125 PetriNetUnfolderBase]: For 16725/16725 co-relation queries the response was YES. [2023-11-06 21:16:46,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41167 conditions, 10719 events. 6636/10719 cut-off events. For 16725/16725 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 61127 event pairs, 3380 based on Foata normal form. 50/10169 useless extension candidates. Maximal degree in co-relation 41144. Up to 9522 conditions per place. [2023-11-06 21:16:46,549 INFO L140 encePairwiseOnDemand]: 1355/1360 looper letters, 98 selfloop transitions, 8 changer transitions 0/106 dead transitions. [2023-11-06 21:16:46,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 106 transitions, 925 flow [2023-11-06 21:16:46,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:16:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:16:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1688 transitions. [2023-11-06 21:16:46,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137254901960784 [2023-11-06 21:16:46,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1688 transitions. [2023-11-06 21:16:46,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1688 transitions. [2023-11-06 21:16:46,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:46,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1688 transitions. [2023-11-06 21:16:46,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 562.6666666666666) internal successors, (1688), 3 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:46,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1360.0) internal successors, (5440), 4 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:46,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1360.0) internal successors, (5440), 4 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:46,556 INFO L175 Difference]: Start difference. First operand has 94 places, 84 transitions, 595 flow. Second operand 3 states and 1688 transitions. [2023-11-06 21:16:46,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 106 transitions, 925 flow [2023-11-06 21:16:46,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 106 transitions, 923 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-06 21:16:46,591 INFO L231 Difference]: Finished difference. Result has 96 places, 84 transitions, 619 flow [2023-11-06 21:16:46,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=619, PETRI_PLACES=96, PETRI_TRANSITIONS=84} [2023-11-06 21:16:46,591 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 22 predicate places. [2023-11-06 21:16:46,591 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 84 transitions, 619 flow [2023-11-06 21:16:46,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 551.6666666666666) internal successors, (1655), 3 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:46,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:46,592 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:46,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-06 21:16:46,592 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:16:46,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:46,592 INFO L85 PathProgramCache]: Analyzing trace with hash 983479592, now seen corresponding path program 1 times [2023-11-06 21:16:46,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:46,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603270452] [2023-11-06 21:16:46,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:46,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:16:47,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:47,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603270452] [2023-11-06 21:16:47,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603270452] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:47,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868470158] [2023-11-06 21:16:47,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:47,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:47,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:47,196 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:47,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 21:16:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:47,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:16:47,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:16:47,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:48,081 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 108 [2023-11-06 21:16:48,088 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 106 [2023-11-06 21:16:48,226 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-11-06 21:16:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:16:48,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868470158] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:48,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:48,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 33 [2023-11-06 21:16:48,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012184796] [2023-11-06 21:16:48,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:48,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 21:16:48,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:48,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 21:16:48,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 21:16:52,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 516 out of 1360 [2023-11-06 21:16:52,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 84 transitions, 619 flow. Second operand has 34 states, 34 states have (on average 518.0) internal successors, (17612), 34 states have internal predecessors, (17612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:52,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:52,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 516 of 1360 [2023-11-06 21:16:52,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:16:56,966 INFO L124 PetriNetUnfolderBase]: 8494/13699 cut-off events. [2023-11-06 21:16:56,966 INFO L125 PetriNetUnfolderBase]: For 23387/23387 co-relation queries the response was YES. [2023-11-06 21:16:57,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52974 conditions, 13699 events. 8494/13699 cut-off events. For 23387/23387 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 77291 event pairs, 1118 based on Foata normal form. 550/13449 useless extension candidates. Maximal degree in co-relation 52949. Up to 3443 conditions per place. [2023-11-06 21:16:57,082 INFO L140 encePairwiseOnDemand]: 1346/1360 looper letters, 248 selfloop transitions, 31 changer transitions 0/279 dead transitions. [2023-11-06 21:16:57,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 279 transitions, 2273 flow [2023-11-06 21:16:57,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 21:16:57,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 21:16:57,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 7914 transitions. [2023-11-06 21:16:57,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38794117647058823 [2023-11-06 21:16:57,090 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 7914 transitions. [2023-11-06 21:16:57,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 7914 transitions. [2023-11-06 21:16:57,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:16:57,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 7914 transitions. [2023-11-06 21:16:57,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 527.6) internal successors, (7914), 15 states have internal predecessors, (7914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:57,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 1360.0) internal successors, (21760), 16 states have internal predecessors, (21760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:57,120 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 1360.0) internal successors, (21760), 16 states have internal predecessors, (21760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:57,120 INFO L175 Difference]: Start difference. First operand has 96 places, 84 transitions, 619 flow. Second operand 15 states and 7914 transitions. [2023-11-06 21:16:57,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 279 transitions, 2273 flow [2023-11-06 21:16:57,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 279 transitions, 2265 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:16:57,184 INFO L231 Difference]: Finished difference. Result has 114 places, 91 transitions, 794 flow [2023-11-06 21:16:57,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=794, PETRI_PLACES=114, PETRI_TRANSITIONS=91} [2023-11-06 21:16:57,185 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 40 predicate places. [2023-11-06 21:16:57,185 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 91 transitions, 794 flow [2023-11-06 21:16:57,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 518.0) internal successors, (17612), 34 states have internal predecessors, (17612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:57,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:16:57,188 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:57,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:57,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 21:16:57,394 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:16:57,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:57,395 INFO L85 PathProgramCache]: Analyzing trace with hash -98377577, now seen corresponding path program 1 times [2023-11-06 21:16:57,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:57,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813286167] [2023-11-06 21:16:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:57,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:57,602 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:16:57,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:57,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813286167] [2023-11-06 21:16:57,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813286167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:16:57,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:16:57,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:16:57,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471002691] [2023-11-06 21:16:57,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:16:57,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:16:57,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:57,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:16:57,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:16:57,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 546 out of 1360 [2023-11-06 21:16:57,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 91 transitions, 794 flow. Second operand has 3 states, 3 states have (on average 553.3333333333334) internal successors, (1660), 3 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:57,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:16:57,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 546 of 1360 [2023-11-06 21:16:57,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:17:00,970 INFO L124 PetriNetUnfolderBase]: 7991/12770 cut-off events. [2023-11-06 21:17:00,970 INFO L125 PetriNetUnfolderBase]: For 30091/30091 co-relation queries the response was YES. [2023-11-06 21:17:01,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51994 conditions, 12770 events. 7991/12770 cut-off events. For 30091/30091 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 71393 event pairs, 4183 based on Foata normal form. 206/12286 useless extension candidates. Maximal degree in co-relation 51964. Up to 12209 conditions per place. [2023-11-06 21:17:01,066 INFO L140 encePairwiseOnDemand]: 1357/1360 looper letters, 139 selfloop transitions, 3 changer transitions 0/142 dead transitions. [2023-11-06 21:17:01,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 142 transitions, 1581 flow [2023-11-06 21:17:01,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:17:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:17:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1695 transitions. [2023-11-06 21:17:01,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41544117647058826 [2023-11-06 21:17:01,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1695 transitions. [2023-11-06 21:17:01,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1695 transitions. [2023-11-06 21:17:01,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:17:01,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1695 transitions. [2023-11-06 21:17:01,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 565.0) internal successors, (1695), 3 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:01,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1360.0) internal successors, (5440), 4 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:01,076 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1360.0) internal successors, (5440), 4 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:01,076 INFO L175 Difference]: Start difference. First operand has 114 places, 91 transitions, 794 flow. Second operand 3 states and 1695 transitions. [2023-11-06 21:17:01,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 142 transitions, 1581 flow [2023-11-06 21:17:01,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 142 transitions, 1515 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-11-06 21:17:01,157 INFO L231 Difference]: Finished difference. Result has 107 places, 91 transitions, 759 flow [2023-11-06 21:17:01,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=759, PETRI_PLACES=107, PETRI_TRANSITIONS=91} [2023-11-06 21:17:01,158 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 33 predicate places. [2023-11-06 21:17:01,158 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 91 transitions, 759 flow [2023-11-06 21:17:01,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 553.3333333333334) internal successors, (1660), 3 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:01,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:17:01,159 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:01,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-06 21:17:01,160 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:17:01,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:01,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2138766062, now seen corresponding path program 1 times [2023-11-06 21:17:01,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:01,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372250633] [2023-11-06 21:17:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:01,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-06 21:17:02,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:02,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372250633] [2023-11-06 21:17:02,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372250633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:17:02,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:17:02,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 21:17:02,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112513237] [2023-11-06 21:17:02,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:17:02,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:17:02,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:02,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:17:02,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:17:02,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 521 out of 1360 [2023-11-06 21:17:02,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 91 transitions, 759 flow. Second operand has 8 states, 8 states have (on average 523.875) internal successors, (4191), 8 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:02,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:17:02,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 521 of 1360 [2023-11-06 21:17:02,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:17:06,467 INFO L124 PetriNetUnfolderBase]: 8304/13371 cut-off events. [2023-11-06 21:17:06,467 INFO L125 PetriNetUnfolderBase]: For 32214/32214 co-relation queries the response was YES. [2023-11-06 21:17:06,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54459 conditions, 13371 events. 8304/13371 cut-off events. For 32214/32214 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 76378 event pairs, 3045 based on Foata normal form. 301/12911 useless extension candidates. Maximal degree in co-relation 54428. Up to 8768 conditions per place. [2023-11-06 21:17:06,552 INFO L140 encePairwiseOnDemand]: 1349/1360 looper letters, 127 selfloop transitions, 24 changer transitions 0/151 dead transitions. [2023-11-06 21:17:06,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 151 transitions, 1432 flow [2023-11-06 21:17:06,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:17:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 21:17:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3706 transitions. [2023-11-06 21:17:06,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2023-11-06 21:17:06,557 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3706 transitions. [2023-11-06 21:17:06,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3706 transitions. [2023-11-06 21:17:06,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:17:06,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3706 transitions. [2023-11-06 21:17:06,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 529.4285714285714) internal successors, (3706), 7 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:06,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1360.0) internal successors, (10880), 8 states have internal predecessors, (10880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:06,564 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1360.0) internal successors, (10880), 8 states have internal predecessors, (10880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:06,564 INFO L175 Difference]: Start difference. First operand has 107 places, 91 transitions, 759 flow. Second operand 7 states and 3706 transitions. [2023-11-06 21:17:06,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 151 transitions, 1432 flow [2023-11-06 21:17:06,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 151 transitions, 1414 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 21:17:06,647 INFO L231 Difference]: Finished difference. Result has 112 places, 96 transitions, 887 flow [2023-11-06 21:17:06,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=887, PETRI_PLACES=112, PETRI_TRANSITIONS=96} [2023-11-06 21:17:06,648 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 38 predicate places. [2023-11-06 21:17:06,648 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 96 transitions, 887 flow [2023-11-06 21:17:06,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 523.875) internal successors, (4191), 8 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:06,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:17:06,649 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:06,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-06 21:17:06,649 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-11-06 21:17:06,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:06,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1930446802, now seen corresponding path program 1 times [2023-11-06 21:17:06,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:06,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129724682] [2023-11-06 21:17:06,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:06,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:17:08,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:08,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129724682] [2023-11-06 21:17:08,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129724682] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:08,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787500349] [2023-11-06 21:17:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:08,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:08,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:08,806 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:08,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6698f653-e270-45f9-bee6-2a03e6a44364/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 21:17:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:09,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 21:17:09,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:10,055 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:17:10,056 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 428 treesize of output 364 [2023-11-06 21:17:10,148 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:17:10,148 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 80 [2023-11-06 21:17:10,170 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:17:10,170 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 66 [2023-11-06 21:17:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:17:10,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:13,826 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:17:13,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 337 treesize of output 323 [2023-11-06 21:17:13,846 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:17:13,846 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 323 treesize of output 317 [2023-11-06 21:17:18,643 INFO L322 Elim1Store]: treesize reduction 29, result has 94.5 percent of original size [2023-11-06 21:17:18,643 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 183 treesize of output 617 [2023-11-06 21:17:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:17:34,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787500349] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:34,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:34,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-11-06 21:17:34,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430070121] [2023-11-06 21:17:34,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:34,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 21:17:34,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:34,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 21:17:34,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2023-11-06 21:17:36,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:17:38,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:17:40,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:17:43,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:17:45,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:17:51,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:17:53,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:17:57,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:17:59,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:18:02,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:18:04,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:18:06,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:18:08,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 21:18:14,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]