./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/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_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:13:19,327 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:13:19,470 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:13:19,475 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:13:19,476 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:13:19,502 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:13:19,503 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:13:19,504 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:13:19,505 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:13:19,505 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:13:19,506 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:13:19,507 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:13:19,508 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:13:19,508 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:13:19,509 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:13:19,510 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:13:19,510 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:13:19,511 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:13:19,512 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:13:19,512 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:13:19,513 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:13:19,514 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:13:19,515 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:13:19,515 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:13:19,516 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:13:19,517 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:13:19,517 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:13:19,518 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:13:19,518 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:13:19,519 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:13:19,520 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:13:19,520 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:13:19,521 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:13:19,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:13:19,522 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:13:19,522 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:13:19,522 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:13:19,523 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:13:19,523 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:13:19,523 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_5557eeca-e619-40ae-a490-84245df32b4e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 [2023-11-06 22:13:19,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:13:19,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:13:19,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:13:19,896 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:13:19,897 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:13:19,898 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2023-11-06 22:13:23,103 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:13:23,350 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:13:23,351 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2023-11-06 22:13:23,361 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/data/e4ea88979/e08e5d7fa00644eb888daa15bd2b3fba/FLAGfffe95889 [2023-11-06 22:13:23,377 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/data/e4ea88979/e08e5d7fa00644eb888daa15bd2b3fba [2023-11-06 22:13:23,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:13:23,382 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:13:23,384 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:13:23,384 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:13:23,390 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:13:23,391 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:13:23" (1/1) ... [2023-11-06 22:13:23,392 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43422038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:23, skipping insertion in model container [2023-11-06 22:13:23,393 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:13:23" (1/1) ... [2023-11-06 22:13:23,460 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:13:23,739 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2023-11-06 22:13:23,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:13:23,774 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:13:23,810 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2023-11-06 22:13:23,817 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:13:23,844 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:13:23,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:23 WrapperNode [2023-11-06 22:13:23,845 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:13:23,848 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:13:23,848 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:13:23,848 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:13:23,858 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:23" (1/1) ... [2023-11-06 22:13:23,889 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:23" (1/1) ... [2023-11-06 22:13:23,956 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 227 [2023-11-06 22:13:23,956 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:13:23,957 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:13:23,957 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:13:23,958 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:13:23,972 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:23" (1/1) ... [2023-11-06 22:13:23,972 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:23" (1/1) ... [2023-11-06 22:13:23,994 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:23" (1/1) ... [2023-11-06 22:13:23,994 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:23" (1/1) ... [2023-11-06 22:13:24,006 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:23" (1/1) ... [2023-11-06 22:13:24,025 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:23" (1/1) ... [2023-11-06 22:13:24,028 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:23" (1/1) ... [2023-11-06 22:13:24,030 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:23" (1/1) ... [2023-11-06 22:13:24,034 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:13:24,036 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:13:24,036 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:13:24,036 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:13:24,037 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:23" (1/1) ... [2023-11-06 22:13:24,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:13:24,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:24,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:13:24,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:13:24,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:13:24,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:13:24,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:13:24,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:13:24,160 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:13:24,160 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:13:24,160 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:13:24,161 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:13:24,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:13:24,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:13:24,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:13:24,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:13:24,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:13:24,166 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:13:24,362 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:13:24,367 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:13:24,863 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:13:24,880 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:13:24,880 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:13:24,884 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:13:24 BoogieIcfgContainer [2023-11-06 22:13:24,884 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:13:24,888 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:13:24,888 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:13:24,899 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:13:24,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:13:23" (1/3) ... [2023-11-06 22:13:24,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5d8245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:13:24, skipping insertion in model container [2023-11-06 22:13:24,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:23" (2/3) ... [2023-11-06 22:13:24,903 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5d8245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:13:24, skipping insertion in model container [2023-11-06 22:13:24,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:13:24" (3/3) ... [2023-11-06 22:13:24,905 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2023-11-06 22:13:24,915 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:13:24,925 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:13:24,925 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:13:24,926 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:13:25,131 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:13:25,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 283 transitions, 580 flow [2023-11-06 22:13:25,435 INFO L124 PetriNetUnfolderBase]: 19/281 cut-off events. [2023-11-06 22:13:25,435 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:13:25,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 281 events. 19/281 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 506 event pairs, 0 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 185. Up to 2 conditions per place. [2023-11-06 22:13:25,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 283 transitions, 580 flow [2023-11-06 22:13:25,472 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 260 places, 272 transitions, 556 flow [2023-11-06 22:13:25,478 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:13:25,493 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 260 places, 272 transitions, 556 flow [2023-11-06 22:13:25,496 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 260 places, 272 transitions, 556 flow [2023-11-06 22:13:25,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 272 transitions, 556 flow [2023-11-06 22:13:25,589 INFO L124 PetriNetUnfolderBase]: 19/272 cut-off events. [2023-11-06 22:13:25,590 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:13:25,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 272 events. 19/272 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 504 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 185. Up to 2 conditions per place. [2023-11-06 22:13:25,604 INFO L119 LiptonReduction]: Number of co-enabled transitions 12212 [2023-11-06 22:13:36,052 INFO L134 LiptonReduction]: Checked pairs total: 10918 [2023-11-06 22:13:36,053 INFO L136 LiptonReduction]: Total number of compositions: 318 [2023-11-06 22:13:36,070 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:13:36,077 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@5cf09426, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:13:36,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:13:36,084 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:13:36,084 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-06 22:13:36,084 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:13:36,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:36,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:36,086 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:36,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:36,092 INFO L85 PathProgramCache]: Analyzing trace with hash -96913585, now seen corresponding path program 1 times [2023-11-06 22:13:36,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:36,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745230956] [2023-11-06 22:13:36,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:36,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:36,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:36,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745230956] [2023-11-06 22:13:36,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745230956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:36,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:36,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:13:36,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763615045] [2023-11-06 22:13:36,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:36,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:13:36,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:36,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:13:36,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:13:36,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 601 [2023-11-06 22:13:36,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:36,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:36,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 601 [2023-11-06 22:13:36,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:36,913 INFO L124 PetriNetUnfolderBase]: 41/76 cut-off events. [2023-11-06 22:13:36,913 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-06 22:13:36,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 76 events. 41/76 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 127 event pairs, 24 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-11-06 22:13:36,917 INFO L140 encePairwiseOnDemand]: 598/601 looper letters, 16 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-11-06 22:13:36,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 84 flow [2023-11-06 22:13:36,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:13:36,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:13:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 793 transitions. [2023-11-06 22:13:36,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43982251802551303 [2023-11-06 22:13:36,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 793 transitions. [2023-11-06 22:13:36,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 793 transitions. [2023-11-06 22:13:36,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:36,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 793 transitions. [2023-11-06 22:13:36,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:36,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:36,983 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:36,985 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 793 transitions. [2023-11-06 22:13:36,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 84 flow [2023-11-06 22:13:36,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 76 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:13:36,992 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-11-06 22:13:36,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-11-06 22:13:37,000 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-06 22:13:37,000 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-11-06 22:13:37,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:37,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:37,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:37,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:13:37,003 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:37,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:37,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1901399348, now seen corresponding path program 1 times [2023-11-06 22:13:37,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:37,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737460721] [2023-11-06 22:13:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:37,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:37,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:37,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737460721] [2023-11-06 22:13:37,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737460721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:37,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819767457] [2023-11-06 22:13:37,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:37,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:37,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:37,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:37,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:13:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:37,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:13:37,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:37,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:37,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819767457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:37,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:37,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-06 22:13:37,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778469008] [2023-11-06 22:13:37,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:37,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:13:37,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:37,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:13:37,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:13:37,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 601 [2023-11-06 22:13:37,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 8 states, 8 states have (on average 258.625) internal successors, (2069), 8 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:37,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:37,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 601 [2023-11-06 22:13:37,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:37,777 INFO L124 PetriNetUnfolderBase]: 41/78 cut-off events. [2023-11-06 22:13:37,778 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:13:37,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 78 events. 41/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 127 event pairs, 24 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 160. Up to 76 conditions per place. [2023-11-06 22:13:37,779 INFO L140 encePairwiseOnDemand]: 598/601 looper letters, 16 selfloop transitions, 4 changer transitions 0/20 dead transitions. [2023-11-06 22:13:37,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 20 transitions, 98 flow [2023-11-06 22:13:37,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:37,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:13:37,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1302 transitions. [2023-11-06 22:13:37,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43327787021630615 [2023-11-06 22:13:37,786 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1302 transitions. [2023-11-06 22:13:37,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1302 transitions. [2023-11-06 22:13:37,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:37,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1302 transitions. [2023-11-06 22:13:37,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 260.4) internal successors, (1302), 5 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:37,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:37,803 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:37,804 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 1302 transitions. [2023-11-06 22:13:37,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 20 transitions, 98 flow [2023-11-06 22:13:37,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 20 transitions, 94 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:37,806 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 72 flow [2023-11-06 22:13:37,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=72, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2023-11-06 22:13:37,807 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 4 predicate places. [2023-11-06 22:13:37,808 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 72 flow [2023-11-06 22:13:37,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 258.625) internal successors, (2069), 8 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:37,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:37,810 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:37,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:38,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:38,017 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:38,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:38,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1630199404, now seen corresponding path program 2 times [2023-11-06 22:13:38,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:38,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643306476] [2023-11-06 22:13:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:38,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:38,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:38,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643306476] [2023-11-06 22:13:38,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643306476] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:38,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:38,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:13:38,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954977904] [2023-11-06 22:13:38,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:38,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:13:38,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:38,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:13:38,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:13:38,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 601 [2023-11-06 22:13:38,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 72 flow. Second operand has 6 states, 6 states have (on average 239.5) internal successors, (1437), 6 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:38,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:38,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 601 [2023-11-06 22:13:38,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:39,097 INFO L124 PetriNetUnfolderBase]: 57/107 cut-off events. [2023-11-06 22:13:39,097 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:13:39,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 107 events. 57/107 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 251 event pairs, 2 based on Foata normal form. 1/82 useless extension candidates. Maximal degree in co-relation 211. Up to 68 conditions per place. [2023-11-06 22:13:39,100 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 28 selfloop transitions, 8 changer transitions 3/39 dead transitions. [2023-11-06 22:13:39,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 39 transitions, 192 flow [2023-11-06 22:13:39,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:39,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:13:39,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1222 transitions. [2023-11-06 22:13:39,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40665557404326125 [2023-11-06 22:13:39,108 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1222 transitions. [2023-11-06 22:13:39,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1222 transitions. [2023-11-06 22:13:39,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:39,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1222 transitions. [2023-11-06 22:13:39,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 244.4) internal successors, (1222), 5 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:39,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:39,126 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:39,127 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 72 flow. Second operand 5 states and 1222 transitions. [2023-11-06 22:13:39,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 39 transitions, 192 flow [2023-11-06 22:13:39,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 39 transitions, 182 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:39,131 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 119 flow [2023-11-06 22:13:39,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-11-06 22:13:39,133 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-11-06 22:13:39,133 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 119 flow [2023-11-06 22:13:39,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 239.5) internal successors, (1437), 6 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:39,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:39,137 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:39,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:13:39,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:39,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:39,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1445254762, now seen corresponding path program 3 times [2023-11-06 22:13:39,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:39,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659396079] [2023-11-06 22:13:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:39,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:39,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:39,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659396079] [2023-11-06 22:13:39,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659396079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:39,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:39,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:13:39,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605188251] [2023-11-06 22:13:39,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:39,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:13:39,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:39,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:13:39,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:13:39,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 601 [2023-11-06 22:13:39,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 239.5) internal successors, (1437), 6 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:39,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:39,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 601 [2023-11-06 22:13:39,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:40,137 INFO L124 PetriNetUnfolderBase]: 79/154 cut-off events. [2023-11-06 22:13:40,137 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-11-06 22:13:40,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 154 events. 79/154 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 441 event pairs, 18 based on Foata normal form. 1/123 useless extension candidates. Maximal degree in co-relation 431. Up to 85 conditions per place. [2023-11-06 22:13:40,144 INFO L140 encePairwiseOnDemand]: 595/601 looper letters, 36 selfloop transitions, 6 changer transitions 6/48 dead transitions. [2023-11-06 22:13:40,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 48 transitions, 284 flow [2023-11-06 22:13:40,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:40,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:13:40,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1225 transitions. [2023-11-06 22:13:40,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40765391014975044 [2023-11-06 22:13:40,152 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1225 transitions. [2023-11-06 22:13:40,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1225 transitions. [2023-11-06 22:13:40,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:40,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1225 transitions. [2023-11-06 22:13:40,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:40,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:40,172 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:40,172 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 119 flow. Second operand 5 states and 1225 transitions. [2023-11-06 22:13:40,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 48 transitions, 284 flow [2023-11-06 22:13:40,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 48 transitions, 279 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:40,180 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 154 flow [2023-11-06 22:13:40,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-11-06 22:13:40,183 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-11-06 22:13:40,183 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 154 flow [2023-11-06 22:13:40,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 239.5) internal successors, (1437), 6 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:40,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:40,185 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:40,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:13:40,189 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:40,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:40,191 INFO L85 PathProgramCache]: Analyzing trace with hash -824312150, now seen corresponding path program 4 times [2023-11-06 22:13:40,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:40,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869403628] [2023-11-06 22:13:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:40,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:40,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:40,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869403628] [2023-11-06 22:13:40,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869403628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:40,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:40,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:13:40,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620201480] [2023-11-06 22:13:40,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:40,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:13:40,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:40,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:13:40,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:13:40,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 601 [2023-11-06 22:13:40,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 235.5) internal successors, (1413), 6 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:40,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:40,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 601 [2023-11-06 22:13:40,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:41,090 INFO L124 PetriNetUnfolderBase]: 95/184 cut-off events. [2023-11-06 22:13:41,090 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2023-11-06 22:13:41,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 184 events. 95/184 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 600 event pairs, 8 based on Foata normal form. 1/173 useless extension candidates. Maximal degree in co-relation 641. Up to 98 conditions per place. [2023-11-06 22:13:41,093 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 37 selfloop transitions, 10 changer transitions 4/51 dead transitions. [2023-11-06 22:13:41,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 351 flow [2023-11-06 22:13:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:41,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:13:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1204 transitions. [2023-11-06 22:13:41,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40066555740432613 [2023-11-06 22:13:41,099 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1204 transitions. [2023-11-06 22:13:41,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1204 transitions. [2023-11-06 22:13:41,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:41,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1204 transitions. [2023-11-06 22:13:41,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 240.8) internal successors, (1204), 5 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:41,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:41,114 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:41,114 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 154 flow. Second operand 5 states and 1204 transitions. [2023-11-06 22:13:41,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 351 flow [2023-11-06 22:13:41,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 321 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-11-06 22:13:41,119 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 205 flow [2023-11-06 22:13:41,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=205, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-11-06 22:13:41,120 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2023-11-06 22:13:41,121 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 205 flow [2023-11-06 22:13:41,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 235.5) internal successors, (1413), 6 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:41,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:41,122 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:41,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:13:41,122 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:41,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:41,123 INFO L85 PathProgramCache]: Analyzing trace with hash 684363272, now seen corresponding path program 5 times [2023-11-06 22:13:41,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:41,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708732397] [2023-11-06 22:13:41,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:41,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:41,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:41,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708732397] [2023-11-06 22:13:41,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708732397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:41,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:41,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:13:41,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846928401] [2023-11-06 22:13:41,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:41,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:13:41,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:41,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:13:41,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:13:42,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 601 [2023-11-06 22:13:42,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 205 flow. Second operand has 6 states, 6 states have (on average 234.5) internal successors, (1407), 6 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:42,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:42,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 601 [2023-11-06 22:13:42,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:42,328 INFO L124 PetriNetUnfolderBase]: 97/193 cut-off events. [2023-11-06 22:13:42,328 INFO L125 PetriNetUnfolderBase]: For 355/355 co-relation queries the response was YES. [2023-11-06 22:13:42,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757 conditions, 193 events. 97/193 cut-off events. For 355/355 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 635 event pairs, 20 based on Foata normal form. 1/162 useless extension candidates. Maximal degree in co-relation 727. Up to 91 conditions per place. [2023-11-06 22:13:42,331 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 42 selfloop transitions, 10 changer transitions 4/56 dead transitions. [2023-11-06 22:13:42,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 56 transitions, 419 flow [2023-11-06 22:13:42,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:42,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:13:42,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1203 transitions. [2023-11-06 22:13:42,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40033277870216305 [2023-11-06 22:13:42,337 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1203 transitions. [2023-11-06 22:13:42,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1203 transitions. [2023-11-06 22:13:42,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:42,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1203 transitions. [2023-11-06 22:13:42,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 240.6) internal successors, (1203), 5 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:42,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:42,351 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:42,351 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 205 flow. Second operand 5 states and 1203 transitions. [2023-11-06 22:13:42,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 56 transitions, 419 flow [2023-11-06 22:13:42,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 56 transitions, 400 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-06 22:13:42,356 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 255 flow [2023-11-06 22:13:42,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-11-06 22:13:42,357 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-11-06 22:13:42,357 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 255 flow [2023-11-06 22:13:42,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 234.5) internal successors, (1407), 6 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:42,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:42,359 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:42,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:13:42,359 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:42,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:42,360 INFO L85 PathProgramCache]: Analyzing trace with hash -618292970, now seen corresponding path program 6 times [2023-11-06 22:13:42,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:42,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673482839] [2023-11-06 22:13:42,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:42,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:42,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:42,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673482839] [2023-11-06 22:13:42,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673482839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:42,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:42,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:13:42,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604089270] [2023-11-06 22:13:42,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:42,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:13:42,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:42,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:13:42,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:13:42,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 601 [2023-11-06 22:13:42,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 255 flow. Second operand has 6 states, 6 states have (on average 234.5) internal successors, (1407), 6 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:42,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:42,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 601 [2023-11-06 22:13:42,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:43,217 INFO L124 PetriNetUnfolderBase]: 182/369 cut-off events. [2023-11-06 22:13:43,218 INFO L125 PetriNetUnfolderBase]: For 859/859 co-relation queries the response was YES. [2023-11-06 22:13:43,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1522 conditions, 369 events. 182/369 cut-off events. For 859/859 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1626 event pairs, 45 based on Foata normal form. 2/303 useless extension candidates. Maximal degree in co-relation 1491. Up to 201 conditions per place. [2023-11-06 22:13:43,223 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 60 selfloop transitions, 13 changer transitions 3/76 dead transitions. [2023-11-06 22:13:43,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 76 transitions, 636 flow [2023-11-06 22:13:43,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:43,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:13:43,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1205 transitions. [2023-11-06 22:13:43,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40099833610648916 [2023-11-06 22:13:43,230 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1205 transitions. [2023-11-06 22:13:43,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1205 transitions. [2023-11-06 22:13:43,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:43,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1205 transitions. [2023-11-06 22:13:43,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 241.0) internal successors, (1205), 5 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:43,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:43,245 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:43,245 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 255 flow. Second operand 5 states and 1205 transitions. [2023-11-06 22:13:43,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 76 transitions, 636 flow [2023-11-06 22:13:43,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 76 transitions, 598 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:43,252 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 384 flow [2023-11-06 22:13:43,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=384, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-11-06 22:13:43,253 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-11-06 22:13:43,253 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 384 flow [2023-11-06 22:13:43,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 234.5) internal successors, (1407), 6 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:43,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:43,255 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:43,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:13:43,255 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:43,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:43,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1441500918, now seen corresponding path program 7 times [2023-11-06 22:13:43,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:43,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079101667] [2023-11-06 22:13:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:43,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:43,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:43,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079101667] [2023-11-06 22:13:43,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079101667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:43,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:43,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:13:43,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081362783] [2023-11-06 22:13:43,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:43,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:13:43,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:43,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:13:43,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:13:43,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 601 [2023-11-06 22:13:43,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 384 flow. Second operand has 6 states, 6 states have (on average 241.5) internal successors, (1449), 6 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:43,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:43,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 601 [2023-11-06 22:13:43,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:44,167 INFO L124 PetriNetUnfolderBase]: 171/344 cut-off events. [2023-11-06 22:13:44,167 INFO L125 PetriNetUnfolderBase]: For 1122/1122 co-relation queries the response was YES. [2023-11-06 22:13:44,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1541 conditions, 344 events. 171/344 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1429 event pairs, 46 based on Foata normal form. 6/320 useless extension candidates. Maximal degree in co-relation 1507. Up to 198 conditions per place. [2023-11-06 22:13:44,172 INFO L140 encePairwiseOnDemand]: 595/601 looper letters, 48 selfloop transitions, 9 changer transitions 6/63 dead transitions. [2023-11-06 22:13:44,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 63 transitions, 581 flow [2023-11-06 22:13:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:13:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1236 transitions. [2023-11-06 22:13:44,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4113144758735441 [2023-11-06 22:13:44,180 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1236 transitions. [2023-11-06 22:13:44,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1236 transitions. [2023-11-06 22:13:44,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:44,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1236 transitions. [2023-11-06 22:13:44,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 247.2) internal successors, (1236), 5 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:44,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:44,193 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:44,193 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 384 flow. Second operand 5 states and 1236 transitions. [2023-11-06 22:13:44,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 63 transitions, 581 flow [2023-11-06 22:13:44,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 576 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:44,203 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 371 flow [2023-11-06 22:13:44,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=371, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2023-11-06 22:13:44,207 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2023-11-06 22:13:44,207 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 371 flow [2023-11-06 22:13:44,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 241.5) internal successors, (1449), 6 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:44,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:44,208 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:44,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:13:44,209 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:44,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:44,210 INFO L85 PathProgramCache]: Analyzing trace with hash 27494286, now seen corresponding path program 1 times [2023-11-06 22:13:44,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:44,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260306815] [2023-11-06 22:13:44,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:44,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:44,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:44,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260306815] [2023-11-06 22:13:44,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260306815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:44,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:44,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:13:44,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018221885] [2023-11-06 22:13:44,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:44,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:13:44,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:44,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:13:44,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:13:44,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 601 [2023-11-06 22:13:44,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 371 flow. Second operand has 5 states, 5 states have (on average 250.2) internal successors, (1251), 5 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:44,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:44,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 601 [2023-11-06 22:13:44,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:44,713 INFO L124 PetriNetUnfolderBase]: 167/320 cut-off events. [2023-11-06 22:13:44,714 INFO L125 PetriNetUnfolderBase]: For 1199/1199 co-relation queries the response was YES. [2023-11-06 22:13:44,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1530 conditions, 320 events. 167/320 cut-off events. For 1199/1199 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1228 event pairs, 14 based on Foata normal form. 4/292 useless extension candidates. Maximal degree in co-relation 1495. Up to 151 conditions per place. [2023-11-06 22:13:44,718 INFO L140 encePairwiseOnDemand]: 596/601 looper letters, 53 selfloop transitions, 10 changer transitions 0/63 dead transitions. [2023-11-06 22:13:44,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 63 transitions, 621 flow [2023-11-06 22:13:44,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:13:44,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1273 transitions. [2023-11-06 22:13:44,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236272878535774 [2023-11-06 22:13:44,724 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1273 transitions. [2023-11-06 22:13:44,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1273 transitions. [2023-11-06 22:13:44,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:44,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1273 transitions. [2023-11-06 22:13:44,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 254.6) internal successors, (1273), 5 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:44,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:44,736 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:44,736 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 371 flow. Second operand 5 states and 1273 transitions. [2023-11-06 22:13:44,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 63 transitions, 621 flow [2023-11-06 22:13:44,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 571 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-11-06 22:13:44,744 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 393 flow [2023-11-06 22:13:44,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=393, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-11-06 22:13:44,745 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 32 predicate places. [2023-11-06 22:13:44,745 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 393 flow [2023-11-06 22:13:44,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 250.2) internal successors, (1251), 5 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:44,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:44,746 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:44,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:13:44,747 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:44,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:44,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1031539490, now seen corresponding path program 2 times [2023-11-06 22:13:44,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:44,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145751778] [2023-11-06 22:13:44,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:44,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:44,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:44,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145751778] [2023-11-06 22:13:44,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145751778] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:44,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:44,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:13:44,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032892684] [2023-11-06 22:13:44,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:44,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:13:44,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:44,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:13:44,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:13:45,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 601 [2023-11-06 22:13:45,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 393 flow. Second operand has 5 states, 5 states have (on average 249.2) internal successors, (1246), 5 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:45,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:45,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 601 [2023-11-06 22:13:45,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:45,197 INFO L124 PetriNetUnfolderBase]: 163/316 cut-off events. [2023-11-06 22:13:45,197 INFO L125 PetriNetUnfolderBase]: For 1253/1253 co-relation queries the response was YES. [2023-11-06 22:13:45,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1482 conditions, 316 events. 163/316 cut-off events. For 1253/1253 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1229 event pairs, 43 based on Foata normal form. 4/288 useless extension candidates. Maximal degree in co-relation 1447. Up to 178 conditions per place. [2023-11-06 22:13:45,201 INFO L140 encePairwiseOnDemand]: 596/601 looper letters, 52 selfloop transitions, 11 changer transitions 8/71 dead transitions. [2023-11-06 22:13:45,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 676 flow [2023-11-06 22:13:45,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:45,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:13:45,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1271 transitions. [2023-11-06 22:13:45,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229617304492512 [2023-11-06 22:13:45,207 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1271 transitions. [2023-11-06 22:13:45,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1271 transitions. [2023-11-06 22:13:45,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:45,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1271 transitions. [2023-11-06 22:13:45,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 254.2) internal successors, (1271), 5 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:45,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:45,218 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:45,218 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 393 flow. Second operand 5 states and 1271 transitions. [2023-11-06 22:13:45,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 676 flow [2023-11-06 22:13:45,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 71 transitions, 652 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-06 22:13:45,226 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 426 flow [2023-11-06 22:13:45,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=426, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-11-06 22:13:45,226 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 37 predicate places. [2023-11-06 22:13:45,227 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 426 flow [2023-11-06 22:13:45,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 249.2) internal successors, (1246), 5 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:45,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:45,228 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:45,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:13:45,228 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:45,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:45,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2049368345, now seen corresponding path program 1 times [2023-11-06 22:13:45,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:45,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077588177] [2023-11-06 22:13:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:45,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:45,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:45,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077588177] [2023-11-06 22:13:45,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077588177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:45,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:45,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:13:45,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341127416] [2023-11-06 22:13:45,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:45,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:13:45,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:45,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:13:45,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:13:45,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 601 [2023-11-06 22:13:45,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 426 flow. Second operand has 5 states, 5 states have (on average 250.2) internal successors, (1251), 5 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:45,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:45,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 601 [2023-11-06 22:13:45,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:45,690 INFO L124 PetriNetUnfolderBase]: 157/300 cut-off events. [2023-11-06 22:13:45,690 INFO L125 PetriNetUnfolderBase]: For 1207/1207 co-relation queries the response was YES. [2023-11-06 22:13:45,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1481 conditions, 300 events. 157/300 cut-off events. For 1207/1207 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1109 event pairs, 25 based on Foata normal form. 12/282 useless extension candidates. Maximal degree in co-relation 1443. Up to 133 conditions per place. [2023-11-06 22:13:45,694 INFO L140 encePairwiseOnDemand]: 596/601 looper letters, 56 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2023-11-06 22:13:45,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 650 flow [2023-11-06 22:13:45,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:13:45,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1277 transitions. [2023-11-06 22:13:45,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249584026622296 [2023-11-06 22:13:45,700 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1277 transitions. [2023-11-06 22:13:45,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1277 transitions. [2023-11-06 22:13:45,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:45,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1277 transitions. [2023-11-06 22:13:45,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 255.4) internal successors, (1277), 5 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:45,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:45,711 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:45,712 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 426 flow. Second operand 5 states and 1277 transitions. [2023-11-06 22:13:45,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 650 flow [2023-11-06 22:13:45,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 626 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-06 22:13:45,720 INFO L231 Difference]: Finished difference. Result has 60 places, 47 transitions, 443 flow [2023-11-06 22:13:45,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=443, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2023-11-06 22:13:45,721 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 39 predicate places. [2023-11-06 22:13:45,721 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 443 flow [2023-11-06 22:13:45,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 250.2) internal successors, (1251), 5 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:45,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:45,722 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:45,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:13:45,723 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:45,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:45,723 INFO L85 PathProgramCache]: Analyzing trace with hash 823399881, now seen corresponding path program 2 times [2023-11-06 22:13:45,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:45,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060996075] [2023-11-06 22:13:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:45,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:45,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:45,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060996075] [2023-11-06 22:13:45,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060996075] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:45,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:45,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:13:45,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122635973] [2023-11-06 22:13:45,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:45,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:13:45,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:45,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:13:45,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:13:46,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 601 [2023-11-06 22:13:46,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 443 flow. Second operand has 5 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:46,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:46,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 601 [2023-11-06 22:13:46,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:46,301 INFO L124 PetriNetUnfolderBase]: 155/298 cut-off events. [2023-11-06 22:13:46,301 INFO L125 PetriNetUnfolderBase]: For 1435/1435 co-relation queries the response was YES. [2023-11-06 22:13:46,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1479 conditions, 298 events. 155/298 cut-off events. For 1435/1435 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1101 event pairs, 47 based on Foata normal form. 2/270 useless extension candidates. Maximal degree in co-relation 1441. Up to 175 conditions per place. [2023-11-06 22:13:46,305 INFO L140 encePairwiseOnDemand]: 596/601 looper letters, 48 selfloop transitions, 10 changer transitions 2/60 dead transitions. [2023-11-06 22:13:46,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 60 transitions, 596 flow [2023-11-06 22:13:46,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:13:46,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1253 transitions. [2023-11-06 22:13:46,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169717138103161 [2023-11-06 22:13:46,312 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1253 transitions. [2023-11-06 22:13:46,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1253 transitions. [2023-11-06 22:13:46,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:46,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1253 transitions. [2023-11-06 22:13:46,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 250.6) internal successors, (1253), 5 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:46,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:46,323 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:46,324 INFO L175 Difference]: Start difference. First operand has 60 places, 47 transitions, 443 flow. Second operand 5 states and 1253 transitions. [2023-11-06 22:13:46,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 60 transitions, 596 flow [2023-11-06 22:13:46,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 60 transitions, 576 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-06 22:13:46,331 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 415 flow [2023-11-06 22:13:46,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=415, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-11-06 22:13:46,333 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2023-11-06 22:13:46,333 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 415 flow [2023-11-06 22:13:46,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:46,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:46,334 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:46,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 22:13:46,335 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:46,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:46,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1351907974, now seen corresponding path program 3 times [2023-11-06 22:13:46,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:46,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973104460] [2023-11-06 22:13:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:46,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:46,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:46,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973104460] [2023-11-06 22:13:46,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973104460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:46,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:46,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:13:46,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615878239] [2023-11-06 22:13:46,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:46,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:13:46,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:46,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:13:46,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:13:46,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 601 [2023-11-06 22:13:46,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 415 flow. Second operand has 5 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:46,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:46,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 601 [2023-11-06 22:13:46,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:46,889 INFO L124 PetriNetUnfolderBase]: 150/291 cut-off events. [2023-11-06 22:13:46,890 INFO L125 PetriNetUnfolderBase]: For 1283/1283 co-relation queries the response was YES. [2023-11-06 22:13:46,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1422 conditions, 291 events. 150/291 cut-off events. For 1283/1283 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1065 event pairs, 49 based on Foata normal form. 4/265 useless extension candidates. Maximal degree in co-relation 1385. Up to 175 conditions per place. [2023-11-06 22:13:46,894 INFO L140 encePairwiseOnDemand]: 596/601 looper letters, 45 selfloop transitions, 9 changer transitions 4/58 dead transitions. [2023-11-06 22:13:46,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 58 transitions, 563 flow [2023-11-06 22:13:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:13:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1252 transitions. [2023-11-06 22:13:46,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166389351081531 [2023-11-06 22:13:46,900 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1252 transitions. [2023-11-06 22:13:46,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1252 transitions. [2023-11-06 22:13:46,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:46,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1252 transitions. [2023-11-06 22:13:46,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 250.4) internal successors, (1252), 5 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:46,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:46,912 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:46,912 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 415 flow. Second operand 5 states and 1252 transitions. [2023-11-06 22:13:46,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 58 transitions, 563 flow [2023-11-06 22:13:46,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 58 transitions, 542 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:46,926 INFO L231 Difference]: Finished difference. Result has 62 places, 43 transitions, 383 flow [2023-11-06 22:13:46,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=383, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2023-11-06 22:13:46,928 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2023-11-06 22:13:46,928 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 383 flow [2023-11-06 22:13:46,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:46,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:46,929 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:46,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 22:13:46,930 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:46,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:46,930 INFO L85 PathProgramCache]: Analyzing trace with hash -794993171, now seen corresponding path program 3 times [2023-11-06 22:13:46,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:46,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961464427] [2023-11-06 22:13:46,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:46,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:47,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:47,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961464427] [2023-11-06 22:13:47,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961464427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:47,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:47,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:13:47,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937487771] [2023-11-06 22:13:47,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:47,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:13:47,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:47,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:13:47,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:13:47,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 601 [2023-11-06 22:13:47,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 383 flow. Second operand has 5 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:47,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:47,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 601 [2023-11-06 22:13:47,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:47,440 INFO L124 PetriNetUnfolderBase]: 139/261 cut-off events. [2023-11-06 22:13:47,440 INFO L125 PetriNetUnfolderBase]: For 1141/1141 co-relation queries the response was YES. [2023-11-06 22:13:47,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1264 conditions, 261 events. 139/261 cut-off events. For 1141/1141 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 883 event pairs, 41 based on Foata normal form. 6/239 useless extension candidates. Maximal degree in co-relation 1227. Up to 140 conditions per place. [2023-11-06 22:13:47,444 INFO L140 encePairwiseOnDemand]: 596/601 looper letters, 46 selfloop transitions, 10 changer transitions 0/56 dead transitions. [2023-11-06 22:13:47,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 56 transitions, 533 flow [2023-11-06 22:13:47,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:47,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:13:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1254 transitions. [2023-11-06 22:13:47,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173044925124792 [2023-11-06 22:13:47,451 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1254 transitions. [2023-11-06 22:13:47,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1254 transitions. [2023-11-06 22:13:47,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:47,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1254 transitions. [2023-11-06 22:13:47,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 250.8) internal successors, (1254), 5 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:47,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:47,464 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:47,465 INFO L175 Difference]: Start difference. First operand has 62 places, 43 transitions, 383 flow. Second operand 5 states and 1254 transitions. [2023-11-06 22:13:47,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 56 transitions, 533 flow [2023-11-06 22:13:47,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 56 transitions, 487 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-11-06 22:13:47,472 INFO L231 Difference]: Finished difference. Result has 58 places, 40 transitions, 337 flow [2023-11-06 22:13:47,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=337, PETRI_PLACES=58, PETRI_TRANSITIONS=40} [2023-11-06 22:13:47,473 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 37 predicate places. [2023-11-06 22:13:47,474 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 40 transitions, 337 flow [2023-11-06 22:13:47,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:47,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:47,475 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:47,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:13:47,475 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:47,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:47,476 INFO L85 PathProgramCache]: Analyzing trace with hash -497372250, now seen corresponding path program 4 times [2023-11-06 22:13:47,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:47,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32258267] [2023-11-06 22:13:47,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:47,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:47,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:47,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32258267] [2023-11-06 22:13:47,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32258267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:47,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:47,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:13:47,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980091866] [2023-11-06 22:13:47,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:47,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:13:47,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:47,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:13:47,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:13:47,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 601 [2023-11-06 22:13:47,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 40 transitions, 337 flow. Second operand has 5 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:47,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:47,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 601 [2023-11-06 22:13:47,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:47,971 INFO L124 PetriNetUnfolderBase]: 123/226 cut-off events. [2023-11-06 22:13:47,971 INFO L125 PetriNetUnfolderBase]: For 858/858 co-relation queries the response was YES. [2023-11-06 22:13:47,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 226 events. 123/226 cut-off events. For 858/858 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 703 event pairs, 39 based on Foata normal form. 4/210 useless extension candidates. Maximal degree in co-relation 1055. Up to 150 conditions per place. [2023-11-06 22:13:47,974 INFO L140 encePairwiseOnDemand]: 596/601 looper letters, 42 selfloop transitions, 9 changer transitions 0/51 dead transitions. [2023-11-06 22:13:47,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 466 flow [2023-11-06 22:13:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:47,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:13:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1252 transitions. [2023-11-06 22:13:47,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166389351081531 [2023-11-06 22:13:47,980 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1252 transitions. [2023-11-06 22:13:47,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1252 transitions. [2023-11-06 22:13:47,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:47,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1252 transitions. [2023-11-06 22:13:47,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 250.4) internal successors, (1252), 5 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:47,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:47,991 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:47,992 INFO L175 Difference]: Start difference. First operand has 58 places, 40 transitions, 337 flow. Second operand 5 states and 1252 transitions. [2023-11-06 22:13:47,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 466 flow [2023-11-06 22:13:47,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 51 transitions, 419 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-11-06 22:13:47,997 INFO L231 Difference]: Finished difference. Result has 55 places, 37 transitions, 294 flow [2023-11-06 22:13:47,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=55, PETRI_TRANSITIONS=37} [2023-11-06 22:13:47,998 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 34 predicate places. [2023-11-06 22:13:47,998 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 37 transitions, 294 flow [2023-11-06 22:13:47,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:47,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:47,999 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:47,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 22:13:47,999 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:48,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:48,000 INFO L85 PathProgramCache]: Analyzing trace with hash -710628936, now seen corresponding path program 5 times [2023-11-06 22:13:48,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:48,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609566826] [2023-11-06 22:13:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:48,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:48,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:48,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609566826] [2023-11-06 22:13:48,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609566826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:48,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:48,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:13:48,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525034869] [2023-11-06 22:13:48,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:48,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:13:48,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:48,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:13:48,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:13:48,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 601 [2023-11-06 22:13:48,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 37 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:48,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:48,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 601 [2023-11-06 22:13:48,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:48,479 INFO L124 PetriNetUnfolderBase]: 119/222 cut-off events. [2023-11-06 22:13:48,479 INFO L125 PetriNetUnfolderBase]: For 785/785 co-relation queries the response was YES. [2023-11-06 22:13:48,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1003 conditions, 222 events. 119/222 cut-off events. For 785/785 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 689 event pairs, 40 based on Foata normal form. 4/206 useless extension candidates. Maximal degree in co-relation 969. Up to 167 conditions per place. [2023-11-06 22:13:48,482 INFO L140 encePairwiseOnDemand]: 596/601 looper letters, 33 selfloop transitions, 12 changer transitions 4/49 dead transitions. [2023-11-06 22:13:48,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 49 transitions, 450 flow [2023-11-06 22:13:48,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:13:48,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1247 transitions. [2023-11-06 22:13:48,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4149750415973378 [2023-11-06 22:13:48,488 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1247 transitions. [2023-11-06 22:13:48,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1247 transitions. [2023-11-06 22:13:48,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:48,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1247 transitions. [2023-11-06 22:13:48,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 249.4) internal successors, (1247), 5 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:48,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:48,501 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:48,501 INFO L175 Difference]: Start difference. First operand has 55 places, 37 transitions, 294 flow. Second operand 5 states and 1247 transitions. [2023-11-06 22:13:48,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 49 transitions, 450 flow [2023-11-06 22:13:48,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 418 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-06 22:13:48,506 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 309 flow [2023-11-06 22:13:48,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=55, PETRI_TRANSITIONS=39} [2023-11-06 22:13:48,507 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 34 predicate places. [2023-11-06 22:13:48,507 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 309 flow [2023-11-06 22:13:48,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:48,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:48,508 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:48,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 22:13:48,508 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:48,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:48,509 INFO L85 PathProgramCache]: Analyzing trace with hash 433042858, now seen corresponding path program 6 times [2023-11-06 22:13:48,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:48,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632517363] [2023-11-06 22:13:48,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:48,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:48,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:48,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632517363] [2023-11-06 22:13:48,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632517363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:48,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:48,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:13:48,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155038588] [2023-11-06 22:13:48,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:48,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:13:48,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:48,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:13:48,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:13:48,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 601 [2023-11-06 22:13:48,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 309 flow. Second operand has 5 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:48,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:48,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 601 [2023-11-06 22:13:48,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:49,023 INFO L124 PetriNetUnfolderBase]: 108/197 cut-off events. [2023-11-06 22:13:49,024 INFO L125 PetriNetUnfolderBase]: For 802/802 co-relation queries the response was YES. [2023-11-06 22:13:49,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 197 events. 108/197 cut-off events. For 802/802 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 572 event pairs, 32 based on Foata normal form. 4/185 useless extension candidates. Maximal degree in co-relation 891. Up to 139 conditions per place. [2023-11-06 22:13:49,027 INFO L140 encePairwiseOnDemand]: 596/601 looper letters, 35 selfloop transitions, 13 changer transitions 1/49 dead transitions. [2023-11-06 22:13:49,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 49 transitions, 451 flow [2023-11-06 22:13:49,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:13:49,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:13:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1247 transitions. [2023-11-06 22:13:49,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4149750415973378 [2023-11-06 22:13:49,034 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1247 transitions. [2023-11-06 22:13:49,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1247 transitions. [2023-11-06 22:13:49,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:49,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1247 transitions. [2023-11-06 22:13:49,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 249.4) internal successors, (1247), 5 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:49,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:49,047 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:49,048 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 309 flow. Second operand 5 states and 1247 transitions. [2023-11-06 22:13:49,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 49 transitions, 451 flow [2023-11-06 22:13:49,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 49 transitions, 437 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 22:13:49,053 INFO L231 Difference]: Finished difference. Result has 58 places, 39 transitions, 322 flow [2023-11-06 22:13:49,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=58, PETRI_TRANSITIONS=39} [2023-11-06 22:13:49,054 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 37 predicate places. [2023-11-06 22:13:49,054 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 39 transitions, 322 flow [2023-11-06 22:13:49,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:49,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:49,055 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:49,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-06 22:13:49,056 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:49,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:49,057 INFO L85 PathProgramCache]: Analyzing trace with hash 721405881, now seen corresponding path program 1 times [2023-11-06 22:13:49,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:49,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680139392] [2023-11-06 22:13:49,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:49,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:50,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:50,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680139392] [2023-11-06 22:13:50,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680139392] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:50,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633659629] [2023-11-06 22:13:50,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:50,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:50,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:50,415 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:50,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:13:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:50,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:13:50,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:51,187 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 122 treesize of output 78 [2023-11-06 22:13:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:51,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:52,805 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:13:52,806 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 271 treesize of output 163 [2023-11-06 22:13:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:53,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633659629] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:53,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:53,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-06 22:13:53,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37302205] [2023-11-06 22:13:53,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:53,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:13:53,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:53,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:13:53,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:13:54,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 601 [2023-11-06 22:13:54,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 39 transitions, 322 flow. Second operand has 20 states, 20 states have (on average 218.05) internal successors, (4361), 20 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:54,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:54,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 601 [2023-11-06 22:13:54,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:56,463 INFO L124 PetriNetUnfolderBase]: 236/434 cut-off events. [2023-11-06 22:13:56,464 INFO L125 PetriNetUnfolderBase]: For 1438/1438 co-relation queries the response was YES. [2023-11-06 22:13:56,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1903 conditions, 434 events. 236/434 cut-off events. For 1438/1438 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1765 event pairs, 11 based on Foata normal form. 3/393 useless extension candidates. Maximal degree in co-relation 1867. Up to 145 conditions per place. [2023-11-06 22:13:56,469 INFO L140 encePairwiseOnDemand]: 591/601 looper letters, 85 selfloop transitions, 44 changer transitions 24/153 dead transitions. [2023-11-06 22:13:56,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 153 transitions, 1242 flow [2023-11-06 22:13:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:13:56,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:13:56,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5092 transitions. [2023-11-06 22:13:56,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36837155465528465 [2023-11-06 22:13:56,492 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5092 transitions. [2023-11-06 22:13:56,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5092 transitions. [2023-11-06 22:13:56,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:56,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5092 transitions. [2023-11-06 22:13:56,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 221.3913043478261) internal successors, (5092), 23 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:56,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 601.0) internal successors, (14424), 24 states have internal predecessors, (14424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:56,570 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 601.0) internal successors, (14424), 24 states have internal predecessors, (14424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:56,570 INFO L175 Difference]: Start difference. First operand has 58 places, 39 transitions, 322 flow. Second operand 23 states and 5092 transitions. [2023-11-06 22:13:56,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 153 transitions, 1242 flow [2023-11-06 22:13:56,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 153 transitions, 1159 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-11-06 22:13:56,579 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 723 flow [2023-11-06 22:13:56,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=723, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2023-11-06 22:13:56,580 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 64 predicate places. [2023-11-06 22:13:56,580 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 723 flow [2023-11-06 22:13:56,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 218.05) internal successors, (4361), 20 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:56,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:56,582 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:56,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:13:56,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:13:56,787 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:13:56,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:56,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1249537859, now seen corresponding path program 2 times [2023-11-06 22:13:56,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:56,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860183269] [2023-11-06 22:13:56,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:56,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:57,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:57,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860183269] [2023-11-06 22:13:57,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860183269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:57,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036016588] [2023-11-06 22:13:57,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:13:57,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:57,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:57,990 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:58,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:13:58,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:13:58,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:58,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:13:58,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:58,445 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 182 treesize of output 118 [2023-11-06 22:13:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:13:58,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:00,251 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:14:00,251 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 268 treesize of output 180 [2023-11-06 22:14:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:00,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036016588] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:00,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:14:00,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-11-06 22:14:00,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178390667] [2023-11-06 22:14:00,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:00,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:14:00,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:00,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:14:00,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:14:02,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 601 [2023-11-06 22:14:02,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 75 transitions, 723 flow. Second operand has 21 states, 21 states have (on average 218.04761904761904) internal successors, (4579), 21 states have internal predecessors, (4579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:02,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:02,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 601 [2023-11-06 22:14:02,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:05,147 INFO L124 PetriNetUnfolderBase]: 284/547 cut-off events. [2023-11-06 22:14:05,147 INFO L125 PetriNetUnfolderBase]: For 3372/3372 co-relation queries the response was YES. [2023-11-06 22:14:05,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2888 conditions, 547 events. 284/547 cut-off events. For 3372/3372 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2476 event pairs, 29 based on Foata normal form. 8/551 useless extension candidates. Maximal degree in co-relation 2841. Up to 199 conditions per place. [2023-11-06 22:14:05,155 INFO L140 encePairwiseOnDemand]: 592/601 looper letters, 98 selfloop transitions, 50 changer transitions 14/162 dead transitions. [2023-11-06 22:14:05,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 162 transitions, 1582 flow [2023-11-06 22:14:05,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:14:05,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:14:05,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4864 transitions. [2023-11-06 22:14:05,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3678717289366208 [2023-11-06 22:14:05,168 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4864 transitions. [2023-11-06 22:14:05,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4864 transitions. [2023-11-06 22:14:05,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:05,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4864 transitions. [2023-11-06 22:14:05,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 221.0909090909091) internal successors, (4864), 22 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:05,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 601.0) internal successors, (13823), 23 states have internal predecessors, (13823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:05,197 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 601.0) internal successors, (13823), 23 states have internal predecessors, (13823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:05,197 INFO L175 Difference]: Start difference. First operand has 85 places, 75 transitions, 723 flow. Second operand 22 states and 4864 transitions. [2023-11-06 22:14:05,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 162 transitions, 1582 flow [2023-11-06 22:14:05,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 162 transitions, 1345 flow, removed 108 selfloop flow, removed 8 redundant places. [2023-11-06 22:14:05,218 INFO L231 Difference]: Finished difference. Result has 102 places, 101 transitions, 978 flow [2023-11-06 22:14:05,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=978, PETRI_PLACES=102, PETRI_TRANSITIONS=101} [2023-11-06 22:14:05,219 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 81 predicate places. [2023-11-06 22:14:05,220 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 101 transitions, 978 flow [2023-11-06 22:14:05,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 218.04761904761904) internal successors, (4579), 21 states have internal predecessors, (4579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:05,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:05,221 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:05,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:05,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:05,431 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:14:05,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:05,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2052028475, now seen corresponding path program 3 times [2023-11-06 22:14:05,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:05,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452290615] [2023-11-06 22:14:05,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:05,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:06,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:06,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452290615] [2023-11-06 22:14:06,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452290615] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:06,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832150479] [2023-11-06 22:14:06,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:14:06,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:06,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:06,448 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:06,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:14:06,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:14:06,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:14:06,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:14:06,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:06,886 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 204 treesize of output 132 [2023-11-06 22:14:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:07,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:08,705 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:14:08,706 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 277 treesize of output 181 [2023-11-06 22:14:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:08,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832150479] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:08,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:14:08,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-11-06 22:14:08,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130673994] [2023-11-06 22:14:08,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:08,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:14:08,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:08,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:14:08,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:14:10,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 601 [2023-11-06 22:14:10,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 101 transitions, 978 flow. Second operand has 21 states, 21 states have (on average 217.95238095238096) internal successors, (4577), 21 states have internal predecessors, (4577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:10,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:10,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 601 [2023-11-06 22:14:10,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:12,905 INFO L124 PetriNetUnfolderBase]: 347/686 cut-off events. [2023-11-06 22:14:12,905 INFO L125 PetriNetUnfolderBase]: For 5590/5590 co-relation queries the response was YES. [2023-11-06 22:14:12,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3765 conditions, 686 events. 347/686 cut-off events. For 5590/5590 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3394 event pairs, 72 based on Foata normal form. 2/674 useless extension candidates. Maximal degree in co-relation 3716. Up to 427 conditions per place. [2023-11-06 22:14:12,915 INFO L140 encePairwiseOnDemand]: 592/601 looper letters, 126 selfloop transitions, 58 changer transitions 8/192 dead transitions. [2023-11-06 22:14:12,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 192 transitions, 2023 flow [2023-11-06 22:14:12,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:14:12,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:14:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5078 transitions. [2023-11-06 22:14:12,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367358749909571 [2023-11-06 22:14:12,927 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5078 transitions. [2023-11-06 22:14:12,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5078 transitions. [2023-11-06 22:14:12,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:12,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5078 transitions. [2023-11-06 22:14:12,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 220.7826086956522) internal successors, (5078), 23 states have internal predecessors, (5078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:12,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 601.0) internal successors, (14424), 24 states have internal predecessors, (14424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:12,956 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 601.0) internal successors, (14424), 24 states have internal predecessors, (14424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:12,957 INFO L175 Difference]: Start difference. First operand has 102 places, 101 transitions, 978 flow. Second operand 23 states and 5078 transitions. [2023-11-06 22:14:12,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 192 transitions, 2023 flow [2023-11-06 22:14:12,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 192 transitions, 1897 flow, removed 60 selfloop flow, removed 5 redundant places. [2023-11-06 22:14:12,996 INFO L231 Difference]: Finished difference. Result has 126 places, 137 transitions, 1495 flow [2023-11-06 22:14:12,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1495, PETRI_PLACES=126, PETRI_TRANSITIONS=137} [2023-11-06 22:14:12,997 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 105 predicate places. [2023-11-06 22:14:12,997 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 137 transitions, 1495 flow [2023-11-06 22:14:12,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 217.95238095238096) internal successors, (4577), 21 states have internal predecessors, (4577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:12,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:12,999 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:13,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:13,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-11-06 22:14:13,206 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:14:13,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:13,207 INFO L85 PathProgramCache]: Analyzing trace with hash 653403239, now seen corresponding path program 4 times [2023-11-06 22:14:13,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:13,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359799952] [2023-11-06 22:14:13,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:13,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:14,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:14,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359799952] [2023-11-06 22:14:14,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359799952] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:14,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439315063] [2023-11-06 22:14:14,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:14:14,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:14,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:14,311 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:14,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:14:14,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:14:14,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:14:14,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:14:14,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:14,875 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 183 treesize of output 119 [2023-11-06 22:14:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:15,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:16,900 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:14:16,901 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 222 treesize of output 137 [2023-11-06 22:14:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:17,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439315063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:17,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:14:17,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-06 22:14:17,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593931424] [2023-11-06 22:14:17,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:17,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:14:17,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:17,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:14:17,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:14:19,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 601 [2023-11-06 22:14:19,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 137 transitions, 1495 flow. Second operand has 20 states, 20 states have (on average 218.05) internal successors, (4361), 20 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:19,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:19,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 601 [2023-11-06 22:14:19,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:25,240 INFO L124 PetriNetUnfolderBase]: 580/1212 cut-off events. [2023-11-06 22:14:25,240 INFO L125 PetriNetUnfolderBase]: For 14088/14088 co-relation queries the response was YES. [2023-11-06 22:14:25,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7255 conditions, 1212 events. 580/1212 cut-off events. For 14088/14088 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7358 event pairs, 17 based on Foata normal form. 9/1215 useless extension candidates. Maximal degree in co-relation 7199. Up to 375 conditions per place. [2023-11-06 22:14:25,257 INFO L140 encePairwiseOnDemand]: 591/601 looper letters, 164 selfloop transitions, 150 changer transitions 15/329 dead transitions. [2023-11-06 22:14:25,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 329 transitions, 3763 flow [2023-11-06 22:14:25,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 22:14:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-06 22:14:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 7297 transitions. [2023-11-06 22:14:25,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36792214995210004 [2023-11-06 22:14:25,274 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 7297 transitions. [2023-11-06 22:14:25,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 7297 transitions. [2023-11-06 22:14:25,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:25,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 7297 transitions. [2023-11-06 22:14:25,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 221.12121212121212) internal successors, (7297), 33 states have internal predecessors, (7297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:25,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 601.0) internal successors, (20434), 34 states have internal predecessors, (20434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:25,315 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 601.0) internal successors, (20434), 34 states have internal predecessors, (20434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:25,315 INFO L175 Difference]: Start difference. First operand has 126 places, 137 transitions, 1495 flow. Second operand 33 states and 7297 transitions. [2023-11-06 22:14:25,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 329 transitions, 3763 flow [2023-11-06 22:14:25,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 329 transitions, 3360 flow, removed 181 selfloop flow, removed 6 redundant places. [2023-11-06 22:14:25,389 INFO L231 Difference]: Finished difference. Result has 159 places, 209 transitions, 2516 flow [2023-11-06 22:14:25,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2516, PETRI_PLACES=159, PETRI_TRANSITIONS=209} [2023-11-06 22:14:25,390 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 138 predicate places. [2023-11-06 22:14:25,390 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 209 transitions, 2516 flow [2023-11-06 22:14:25,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 218.05) internal successors, (4361), 20 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:25,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:25,391 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:25,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:25,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 22:14:25,598 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:14:25,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:25,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1328614555, now seen corresponding path program 5 times [2023-11-06 22:14:25,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:25,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912395820] [2023-11-06 22:14:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:25,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:26,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:26,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912395820] [2023-11-06 22:14:26,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912395820] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:26,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713687232] [2023-11-06 22:14:26,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:14:26,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:26,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:26,459 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:26,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:14:26,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:14:26,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:14:26,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:14:26,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:27,182 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 164 treesize of output 104 [2023-11-06 22:14:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:27,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:28,685 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:14:28,686 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 345 treesize of output 209 [2023-11-06 22:14:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:29,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713687232] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:29,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:14:29,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-11-06 22:14:29,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990013191] [2023-11-06 22:14:29,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:29,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:14:29,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:29,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:14:29,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:14:30,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 601 [2023-11-06 22:14:30,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 209 transitions, 2516 flow. Second operand has 21 states, 21 states have (on average 218.0) internal successors, (4578), 21 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:30,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:30,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 601 [2023-11-06 22:14:30,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:31,986 INFO L124 PetriNetUnfolderBase]: 602/1237 cut-off events. [2023-11-06 22:14:31,986 INFO L125 PetriNetUnfolderBase]: For 13382/13382 co-relation queries the response was YES. [2023-11-06 22:14:31,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7704 conditions, 1237 events. 602/1237 cut-off events. For 13382/13382 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7417 event pairs, 120 based on Foata normal form. 6/1243 useless extension candidates. Maximal degree in co-relation 7641. Up to 727 conditions per place. [2023-11-06 22:14:32,012 INFO L140 encePairwiseOnDemand]: 592/601 looper letters, 157 selfloop transitions, 100 changer transitions 15/272 dead transitions. [2023-11-06 22:14:32,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 272 transitions, 3486 flow [2023-11-06 22:14:32,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:14:32,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:14:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 4194 transitions. [2023-11-06 22:14:32,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36728259917681055 [2023-11-06 22:14:32,022 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 4194 transitions. [2023-11-06 22:14:32,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 4194 transitions. [2023-11-06 22:14:32,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:32,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 4194 transitions. [2023-11-06 22:14:32,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 220.73684210526315) internal successors, (4194), 19 states have internal predecessors, (4194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:32,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 601.0) internal successors, (12020), 20 states have internal predecessors, (12020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:32,043 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 601.0) internal successors, (12020), 20 states have internal predecessors, (12020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:32,044 INFO L175 Difference]: Start difference. First operand has 159 places, 209 transitions, 2516 flow. Second operand 19 states and 4194 transitions. [2023-11-06 22:14:32,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 272 transitions, 3486 flow [2023-11-06 22:14:32,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 272 transitions, 2864 flow, removed 293 selfloop flow, removed 5 redundant places. [2023-11-06 22:14:32,168 INFO L231 Difference]: Finished difference. Result has 176 places, 231 transitions, 2413 flow [2023-11-06 22:14:32,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2413, PETRI_PLACES=176, PETRI_TRANSITIONS=231} [2023-11-06 22:14:32,169 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 155 predicate places. [2023-11-06 22:14:32,169 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 231 transitions, 2413 flow [2023-11-06 22:14:32,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 218.0) internal successors, (4578), 21 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:32,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:32,170 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:32,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:32,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:14:32,376 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:14:32,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:32,377 INFO L85 PathProgramCache]: Analyzing trace with hash 36803715, now seen corresponding path program 6 times [2023-11-06 22:14:32,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:32,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002321854] [2023-11-06 22:14:32,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:32,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:33,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:33,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002321854] [2023-11-06 22:14:33,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002321854] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:33,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218582123] [2023-11-06 22:14:33,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:14:33,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:33,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:33,313 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:33,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:14:33,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:14:33,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:14:33,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:14:33,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:33,839 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 161 treesize of output 105 [2023-11-06 22:14:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:34,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:35,661 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:14:35,661 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 311 treesize of output 199 [2023-11-06 22:14:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:35,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218582123] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:35,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:14:35,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-06 22:14:35,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924712527] [2023-11-06 22:14:35,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:35,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:14:35,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:35,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:14:35,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:14:37,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 601 [2023-11-06 22:14:37,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 231 transitions, 2413 flow. Second operand has 20 states, 20 states have (on average 218.0) internal successors, (4360), 20 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:37,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:37,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 601 [2023-11-06 22:14:37,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:40,729 INFO L124 PetriNetUnfolderBase]: 630/1325 cut-off events. [2023-11-06 22:14:40,729 INFO L125 PetriNetUnfolderBase]: For 6898/6898 co-relation queries the response was YES. [2023-11-06 22:14:40,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6538 conditions, 1325 events. 630/1325 cut-off events. For 6898/6898 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8221 event pairs, 100 based on Foata normal form. 10/1333 useless extension candidates. Maximal degree in co-relation 6472. Up to 552 conditions per place. [2023-11-06 22:14:40,750 INFO L140 encePairwiseOnDemand]: 592/601 looper letters, 209 selfloop transitions, 109 changer transitions 20/338 dead transitions. [2023-11-06 22:14:40,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 338 transitions, 3843 flow [2023-11-06 22:14:40,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:14:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:14:40,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4876 transitions. [2023-11-06 22:14:40,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687793072152473 [2023-11-06 22:14:40,760 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4876 transitions. [2023-11-06 22:14:40,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4876 transitions. [2023-11-06 22:14:40,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:40,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4876 transitions. [2023-11-06 22:14:40,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 221.63636363636363) internal successors, (4876), 22 states have internal predecessors, (4876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:40,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 601.0) internal successors, (13823), 23 states have internal predecessors, (13823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:40,788 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 601.0) internal successors, (13823), 23 states have internal predecessors, (13823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:40,788 INFO L175 Difference]: Start difference. First operand has 176 places, 231 transitions, 2413 flow. Second operand 22 states and 4876 transitions. [2023-11-06 22:14:40,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 338 transitions, 3843 flow [2023-11-06 22:14:40,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 338 transitions, 3614 flow, removed 68 selfloop flow, removed 9 redundant places. [2023-11-06 22:14:40,932 INFO L231 Difference]: Finished difference. Result has 192 places, 249 transitions, 2699 flow [2023-11-06 22:14:40,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=2212, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2699, PETRI_PLACES=192, PETRI_TRANSITIONS=249} [2023-11-06 22:14:40,933 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 171 predicate places. [2023-11-06 22:14:40,933 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 249 transitions, 2699 flow [2023-11-06 22:14:40,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 218.0) internal successors, (4360), 20 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:40,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:40,934 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:40,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:41,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:41,142 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:14:41,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:41,142 INFO L85 PathProgramCache]: Analyzing trace with hash -551667623, now seen corresponding path program 7 times [2023-11-06 22:14:41,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:41,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886106181] [2023-11-06 22:14:41,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:41,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:42,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:42,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886106181] [2023-11-06 22:14:42,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886106181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:42,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324067326] [2023-11-06 22:14:42,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:14:42,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:42,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:42,155 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:42,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:14:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:42,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:14:42,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:42,614 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 137 treesize of output 89 [2023-11-06 22:14:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:42,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:44,010 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:14:44,011 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 269 treesize of output 189 [2023-11-06 22:14:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:44,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324067326] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:44,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:14:44,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-11-06 22:14:44,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365223055] [2023-11-06 22:14:44,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:44,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:14:44,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:44,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:14:44,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:14:46,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 601 [2023-11-06 22:14:46,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 249 transitions, 2699 flow. Second operand has 21 states, 21 states have (on average 218.0) internal successors, (4578), 21 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:46,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:46,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 601 [2023-11-06 22:14:46,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:47,898 INFO L124 PetriNetUnfolderBase]: 639/1328 cut-off events. [2023-11-06 22:14:47,898 INFO L125 PetriNetUnfolderBase]: For 7595/7595 co-relation queries the response was YES. [2023-11-06 22:14:47,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6846 conditions, 1328 events. 639/1328 cut-off events. For 7595/7595 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8200 event pairs, 134 based on Foata normal form. 15/1341 useless extension candidates. Maximal degree in co-relation 6776. Up to 763 conditions per place. [2023-11-06 22:14:47,915 INFO L140 encePairwiseOnDemand]: 593/601 looper letters, 180 selfloop transitions, 96 changer transitions 17/293 dead transitions. [2023-11-06 22:14:47,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 293 transitions, 3542 flow [2023-11-06 22:14:47,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:14:47,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:14:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3096 transitions. [2023-11-06 22:14:47,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36795816496315664 [2023-11-06 22:14:47,925 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3096 transitions. [2023-11-06 22:14:47,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3096 transitions. [2023-11-06 22:14:47,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:47,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3096 transitions. [2023-11-06 22:14:47,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 221.14285714285714) internal successors, (3096), 14 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:47,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 601.0) internal successors, (9015), 15 states have internal predecessors, (9015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:47,941 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 601.0) internal successors, (9015), 15 states have internal predecessors, (9015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:47,942 INFO L175 Difference]: Start difference. First operand has 192 places, 249 transitions, 2699 flow. Second operand 14 states and 3096 transitions. [2023-11-06 22:14:47,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 293 transitions, 3542 flow [2023-11-06 22:14:48,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 293 transitions, 3348 flow, removed 87 selfloop flow, removed 9 redundant places. [2023-11-06 22:14:48,030 INFO L231 Difference]: Finished difference. Result has 197 places, 250 transitions, 2739 flow [2023-11-06 22:14:48,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=2513, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2739, PETRI_PLACES=197, PETRI_TRANSITIONS=250} [2023-11-06 22:14:48,031 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 176 predicate places. [2023-11-06 22:14:48,032 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 250 transitions, 2739 flow [2023-11-06 22:14:48,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 218.0) internal successors, (4578), 21 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:48,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:48,033 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:48,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:48,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:48,239 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:14:48,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:48,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1063236219, now seen corresponding path program 8 times [2023-11-06 22:14:48,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:48,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866538220] [2023-11-06 22:14:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:48,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:49,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:49,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866538220] [2023-11-06 22:14:49,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866538220] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:49,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966753851] [2023-11-06 22:14:49,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:14:49,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:49,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:49,605 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:49,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:14:49,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:14:49,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:14:49,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 22:14:49,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:49,794 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 26 treesize of output 24 [2023-11-06 22:14:49,951 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 44 treesize of output 35 [2023-11-06 22:14:50,251 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 158 treesize of output 102 [2023-11-06 22:14:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:50,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:51,532 WARN L839 $PredicateComparison]: unable to prove that (or (= c_~name_1~0 c_~name_2~0) (let ((.cse0 (forall ((v_ArrVal_534 (Array Int Int))) (not (= c_~name_1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_534) c_~nondet_0~0.base) c_~nondet_0~0.offset))))) (.cse1 (forall ((v_ArrVal_534 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_534) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_2~0))))) (and (or .cse0 (< 0 c_~result_3~0)) (or (and (or .cse1 (< c_~name_1~0 c_~name_2~0)) (or (< c_~name_2~0 c_~name_1~0) .cse0)) (< (+ 2147483647 c_~name_2~0) c_~name_1~0) (< (+ c_~name_1~0 2147483648) c_~name_2~0) (< c_~i_4~0 3)) (or (< c_~result_3~0 0) .cse1)))) is different from false [2023-11-06 22:14:51,652 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:14:51,653 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 225 treesize of output 169 [2023-11-06 22:14:51,666 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 112 treesize of output 110 [2023-11-06 22:14:51,678 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 110 treesize of output 108 [2023-11-06 22:14:51,689 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 22:14:51,698 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 106 treesize of output 104 [2023-11-06 22:14:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:51,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966753851] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:51,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:14:51,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 22:14:51,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334878393] [2023-11-06 22:14:51,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:52,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:14:52,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:52,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:14:52,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=517, Unknown=1, NotChecked=46, Total=650 [2023-11-06 22:14:52,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 601 [2023-11-06 22:14:52,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 250 transitions, 2739 flow. Second operand has 26 states, 26 states have (on average 194.76923076923077) internal successors, (5064), 26 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:52,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:52,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 601 [2023-11-06 22:14:52,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:54,494 INFO L124 PetriNetUnfolderBase]: 715/1510 cut-off events. [2023-11-06 22:14:54,494 INFO L125 PetriNetUnfolderBase]: For 9863/9863 co-relation queries the response was YES. [2023-11-06 22:14:54,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7942 conditions, 1510 events. 715/1510 cut-off events. For 9863/9863 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9644 event pairs, 73 based on Foata normal form. 2/1510 useless extension candidates. Maximal degree in co-relation 7873. Up to 385 conditions per place. [2023-11-06 22:14:54,512 INFO L140 encePairwiseOnDemand]: 592/601 looper letters, 152 selfloop transitions, 187 changer transitions 7/346 dead transitions. [2023-11-06 22:14:54,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 346 transitions, 4336 flow [2023-11-06 22:14:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:14:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:14:54,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3957 transitions. [2023-11-06 22:14:54,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32920133111480865 [2023-11-06 22:14:54,519 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3957 transitions. [2023-11-06 22:14:54,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3957 transitions. [2023-11-06 22:14:54,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:54,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3957 transitions. [2023-11-06 22:14:54,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 197.85) internal successors, (3957), 20 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:54,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 601.0) internal successors, (12621), 21 states have internal predecessors, (12621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:54,541 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 601.0) internal successors, (12621), 21 states have internal predecessors, (12621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:54,541 INFO L175 Difference]: Start difference. First operand has 197 places, 250 transitions, 2739 flow. Second operand 20 states and 3957 transitions. [2023-11-06 22:14:54,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 346 transitions, 4336 flow [2023-11-06 22:14:54,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 346 transitions, 4156 flow, removed 18 selfloop flow, removed 11 redundant places. [2023-11-06 22:14:54,640 INFO L231 Difference]: Finished difference. Result has 211 places, 296 transitions, 3784 flow [2023-11-06 22:14:54,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=2605, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3784, PETRI_PLACES=211, PETRI_TRANSITIONS=296} [2023-11-06 22:14:54,641 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 190 predicate places. [2023-11-06 22:14:54,641 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 296 transitions, 3784 flow [2023-11-06 22:14:54,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 194.76923076923077) internal successors, (5064), 26 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:54,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:54,642 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:54,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:54,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:54,854 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:14:54,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:54,855 INFO L85 PathProgramCache]: Analyzing trace with hash -707666618, now seen corresponding path program 9 times [2023-11-06 22:14:54,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:54,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635511074] [2023-11-06 22:14:54,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:54,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:55,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:55,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635511074] [2023-11-06 22:14:55,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635511074] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:55,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168056359] [2023-11-06 22:14:55,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:14:55,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:55,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:55,399 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:55,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:14:55,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:14:55,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:14:55,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:14:55,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:55,722 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 17 treesize of output 9 [2023-11-06 22:14:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:55,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:56,025 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:14:56,025 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 40 treesize of output 19 [2023-11-06 22:14:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:56,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168056359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:56,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:14:56,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-06 22:14:56,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087890415] [2023-11-06 22:14:56,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:56,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:14:56,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:56,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:14:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:14:57,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 601 [2023-11-06 22:14:57,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 296 transitions, 3784 flow. Second operand has 17 states, 17 states have (on average 231.47058823529412) internal successors, (3935), 17 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:57,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:14:57,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 601 [2023-11-06 22:14:57,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:14:58,827 INFO L124 PetriNetUnfolderBase]: 731/1534 cut-off events. [2023-11-06 22:14:58,827 INFO L125 PetriNetUnfolderBase]: For 10854/10854 co-relation queries the response was YES. [2023-11-06 22:14:58,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8684 conditions, 1534 events. 731/1534 cut-off events. For 10854/10854 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 9769 event pairs, 52 based on Foata normal form. 8/1540 useless extension candidates. Maximal degree in co-relation 8610. Up to 233 conditions per place. [2023-11-06 22:14:58,842 INFO L140 encePairwiseOnDemand]: 592/601 looper letters, 189 selfloop transitions, 197 changer transitions 1/387 dead transitions. [2023-11-06 22:14:58,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 387 transitions, 5243 flow [2023-11-06 22:14:58,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:14:58,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:14:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5144 transitions. [2023-11-06 22:14:58,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3890485554379065 [2023-11-06 22:14:58,850 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5144 transitions. [2023-11-06 22:14:58,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5144 transitions. [2023-11-06 22:14:58,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:14:58,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5144 transitions. [2023-11-06 22:14:58,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 233.8181818181818) internal successors, (5144), 22 states have internal predecessors, (5144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:58,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 601.0) internal successors, (13823), 23 states have internal predecessors, (13823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:58,873 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 601.0) internal successors, (13823), 23 states have internal predecessors, (13823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:58,873 INFO L175 Difference]: Start difference. First operand has 211 places, 296 transitions, 3784 flow. Second operand 22 states and 5144 transitions. [2023-11-06 22:14:58,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 387 transitions, 5243 flow [2023-11-06 22:14:59,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 387 transitions, 5009 flow, removed 88 selfloop flow, removed 7 redundant places. [2023-11-06 22:14:59,015 INFO L231 Difference]: Finished difference. Result has 226 places, 323 transitions, 4363 flow [2023-11-06 22:14:59,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=3572, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4363, PETRI_PLACES=226, PETRI_TRANSITIONS=323} [2023-11-06 22:14:59,016 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 205 predicate places. [2023-11-06 22:14:59,016 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 323 transitions, 4363 flow [2023-11-06 22:14:59,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 231.47058823529412) internal successors, (3935), 17 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:59,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:14:59,017 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:59,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:59,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:59,217 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:14:59,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:59,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1210261921, now seen corresponding path program 10 times [2023-11-06 22:14:59,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:59,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919966632] [2023-11-06 22:14:59,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:59,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:14:59,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:59,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919966632] [2023-11-06 22:14:59,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919966632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:59,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821961899] [2023-11-06 22:14:59,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:14:59,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:59,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:59,833 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:59,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:14:59,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:14:59,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:14:59,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:14:59,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:00,193 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 91 treesize of output 59 [2023-11-06 22:15:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:00,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:00,517 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:15:00,517 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 79 treesize of output 42 [2023-11-06 22:15:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:00,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821961899] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:00,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:00,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-06 22:15:00,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764547790] [2023-11-06 22:15:00,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:00,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:15:00,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:00,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:15:00,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:15:01,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 601 [2023-11-06 22:15:01,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 323 transitions, 4363 flow. Second operand has 18 states, 18 states have (on average 230.0) internal successors, (4140), 18 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:01,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:01,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 601 [2023-11-06 22:15:01,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:02,799 INFO L124 PetriNetUnfolderBase]: 749/1570 cut-off events. [2023-11-06 22:15:02,799 INFO L125 PetriNetUnfolderBase]: For 11839/11839 co-relation queries the response was YES. [2023-11-06 22:15:02,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9127 conditions, 1570 events. 749/1570 cut-off events. For 11839/11839 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10057 event pairs, 161 based on Foata normal form. 8/1576 useless extension candidates. Maximal degree in co-relation 9054. Up to 680 conditions per place. [2023-11-06 22:15:02,819 INFO L140 encePairwiseOnDemand]: 593/601 looper letters, 236 selfloop transitions, 129 changer transitions 1/366 dead transitions. [2023-11-06 22:15:02,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 366 transitions, 5338 flow [2023-11-06 22:15:02,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:15:02,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:15:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3498 transitions. [2023-11-06 22:15:02,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880199667221298 [2023-11-06 22:15:02,825 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3498 transitions. [2023-11-06 22:15:02,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3498 transitions. [2023-11-06 22:15:02,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:02,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3498 transitions. [2023-11-06 22:15:02,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 233.2) internal successors, (3498), 15 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:02,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 601.0) internal successors, (9616), 16 states have internal predecessors, (9616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:02,843 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 601.0) internal successors, (9616), 16 states have internal predecessors, (9616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:02,843 INFO L175 Difference]: Start difference. First operand has 226 places, 323 transitions, 4363 flow. Second operand 15 states and 3498 transitions. [2023-11-06 22:15:02,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 366 transitions, 5338 flow [2023-11-06 22:15:02,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 366 transitions, 5278 flow, removed 27 selfloop flow, removed 3 redundant places. [2023-11-06 22:15:03,028 INFO L231 Difference]: Finished difference. Result has 237 places, 325 transitions, 4605 flow [2023-11-06 22:15:03,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=4309, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4605, PETRI_PLACES=237, PETRI_TRANSITIONS=325} [2023-11-06 22:15:03,029 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 216 predicate places. [2023-11-06 22:15:03,029 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 325 transitions, 4605 flow [2023-11-06 22:15:03,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 230.0) internal successors, (4140), 18 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:03,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:03,030 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:03,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-06 22:15:03,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:03,231 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:15:03,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:03,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1333246016, now seen corresponding path program 11 times [2023-11-06 22:15:03,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:03,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164745865] [2023-11-06 22:15:03,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:03,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:03,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:03,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164745865] [2023-11-06 22:15:03,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164745865] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:03,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728537773] [2023-11-06 22:15:03,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:15:03,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:03,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:03,798 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:03,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:15:03,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:15:03,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:15:03,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:15:03,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:04,092 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 17 treesize of output 9 [2023-11-06 22:15:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:04,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:04,323 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:15:04,323 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 40 treesize of output 19 [2023-11-06 22:15:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:04,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728537773] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:04,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:04,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-11-06 22:15:04,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650925462] [2023-11-06 22:15:04,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:04,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:15:04,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:04,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:15:04,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:15:05,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 601 [2023-11-06 22:15:05,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 325 transitions, 4605 flow. Second operand has 18 states, 18 states have (on average 230.05555555555554) internal successors, (4141), 18 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:05,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:05,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 601 [2023-11-06 22:15:05,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:06,679 INFO L124 PetriNetUnfolderBase]: 771/1612 cut-off events. [2023-11-06 22:15:06,679 INFO L125 PetriNetUnfolderBase]: For 12520/12520 co-relation queries the response was YES. [2023-11-06 22:15:06,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9626 conditions, 1612 events. 771/1612 cut-off events. For 12520/12520 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10376 event pairs, 158 based on Foata normal form. 8/1618 useless extension candidates. Maximal degree in co-relation 9553. Up to 581 conditions per place. [2023-11-06 22:15:06,696 INFO L140 encePairwiseOnDemand]: 593/601 looper letters, 288 selfloop transitions, 88 changer transitions 0/376 dead transitions. [2023-11-06 22:15:06,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 376 transitions, 5714 flow [2023-11-06 22:15:06,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:15:06,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:15:06,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2578 transitions. [2023-11-06 22:15:06,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38995613371653304 [2023-11-06 22:15:06,702 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2578 transitions. [2023-11-06 22:15:06,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2578 transitions. [2023-11-06 22:15:06,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:06,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2578 transitions. [2023-11-06 22:15:06,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 234.36363636363637) internal successors, (2578), 11 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:06,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 601.0) internal successors, (7212), 12 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:06,713 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 601.0) internal successors, (7212), 12 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:06,713 INFO L175 Difference]: Start difference. First operand has 237 places, 325 transitions, 4605 flow. Second operand 11 states and 2578 transitions. [2023-11-06 22:15:06,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 376 transitions, 5714 flow [2023-11-06 22:15:06,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 376 transitions, 5484 flow, removed 8 selfloop flow, removed 11 redundant places. [2023-11-06 22:15:06,857 INFO L231 Difference]: Finished difference. Result has 237 places, 330 transitions, 4660 flow [2023-11-06 22:15:06,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=4335, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4660, PETRI_PLACES=237, PETRI_TRANSITIONS=330} [2023-11-06 22:15:06,865 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 216 predicate places. [2023-11-06 22:15:06,865 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 330 transitions, 4660 flow [2023-11-06 22:15:06,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 230.05555555555554) internal successors, (4141), 18 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:06,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:06,867 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:06,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:07,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:15:07,074 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:15:07,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:07,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1987208853, now seen corresponding path program 12 times [2023-11-06 22:15:07,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:07,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322362228] [2023-11-06 22:15:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:07,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:07,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:07,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:07,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322362228] [2023-11-06 22:15:07,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322362228] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:07,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869100236] [2023-11-06 22:15:07,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:15:07,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:07,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:07,675 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:07,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:15:07,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:15:07,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:15:07,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:15:07,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:08,099 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 112 treesize of output 72 [2023-11-06 22:15:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:08,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:08,390 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:15:08,391 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 79 treesize of output 42 [2023-11-06 22:15:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:08,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869100236] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:08,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:08,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-06 22:15:08,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813763234] [2023-11-06 22:15:08,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:08,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:15:08,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:08,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:15:08,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:15:09,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 601 [2023-11-06 22:15:09,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 330 transitions, 4660 flow. Second operand has 18 states, 18 states have (on average 230.22222222222223) internal successors, (4144), 18 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:09,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:09,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 601 [2023-11-06 22:15:09,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:10,547 INFO L124 PetriNetUnfolderBase]: 755/1576 cut-off events. [2023-11-06 22:15:10,547 INFO L125 PetriNetUnfolderBase]: For 12373/12373 co-relation queries the response was YES. [2023-11-06 22:15:10,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9513 conditions, 1576 events. 755/1576 cut-off events. For 12373/12373 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10058 event pairs, 165 based on Foata normal form. 4/1578 useless extension candidates. Maximal degree in co-relation 9438. Up to 712 conditions per place. [2023-11-06 22:15:10,562 INFO L140 encePairwiseOnDemand]: 593/601 looper letters, 230 selfloop transitions, 126 changer transitions 5/361 dead transitions. [2023-11-06 22:15:10,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 361 transitions, 5514 flow [2023-11-06 22:15:10,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:15:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:15:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3262 transitions. [2023-11-06 22:15:10,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3876871880199667 [2023-11-06 22:15:10,568 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3262 transitions. [2023-11-06 22:15:10,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3262 transitions. [2023-11-06 22:15:10,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:10,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3262 transitions. [2023-11-06 22:15:10,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 233.0) internal successors, (3262), 14 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:10,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 601.0) internal successors, (9015), 15 states have internal predecessors, (9015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:10,580 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 601.0) internal successors, (9015), 15 states have internal predecessors, (9015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:10,580 INFO L175 Difference]: Start difference. First operand has 237 places, 330 transitions, 4660 flow. Second operand 14 states and 3262 transitions. [2023-11-06 22:15:10,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 361 transitions, 5514 flow [2023-11-06 22:15:10,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 361 transitions, 5389 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-11-06 22:15:10,714 INFO L231 Difference]: Finished difference. Result has 243 places, 328 transitions, 4752 flow [2023-11-06 22:15:10,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=4520, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4752, PETRI_PLACES=243, PETRI_TRANSITIONS=328} [2023-11-06 22:15:10,715 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 222 predicate places. [2023-11-06 22:15:10,715 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 328 transitions, 4752 flow [2023-11-06 22:15:10,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 230.22222222222223) internal successors, (4144), 18 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:10,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:10,717 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:10,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:10,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:15:10,924 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:15:10,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:10,924 INFO L85 PathProgramCache]: Analyzing trace with hash 687500840, now seen corresponding path program 13 times [2023-11-06 22:15:10,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:10,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313343214] [2023-11-06 22:15:10,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:10,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:11,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:11,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313343214] [2023-11-06 22:15:11,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313343214] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:11,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432009101] [2023-11-06 22:15:11,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:15:11,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:11,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:11,392 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:11,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:15:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:11,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:15:11,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:11,730 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 112 treesize of output 72 [2023-11-06 22:15:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:11,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:12,063 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:15:12,064 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 40 treesize of output 19 [2023-11-06 22:15:12,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:12,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432009101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:12,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:12,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-06 22:15:12,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949350612] [2023-11-06 22:15:12,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:12,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:15:12,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:12,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:15:12,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:15:13,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 601 [2023-11-06 22:15:13,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 328 transitions, 4752 flow. Second operand has 18 states, 18 states have (on average 230.38888888888889) internal successors, (4147), 18 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:13,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:13,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 601 [2023-11-06 22:15:13,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:14,700 INFO L124 PetriNetUnfolderBase]: 775/1626 cut-off events. [2023-11-06 22:15:14,700 INFO L125 PetriNetUnfolderBase]: For 13264/13264 co-relation queries the response was YES. [2023-11-06 22:15:14,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10037 conditions, 1626 events. 775/1626 cut-off events. For 13264/13264 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 10532 event pairs, 108 based on Foata normal form. 6/1630 useless extension candidates. Maximal degree in co-relation 9962. Up to 340 conditions per place. [2023-11-06 22:15:14,719 INFO L140 encePairwiseOnDemand]: 592/601 looper letters, 243 selfloop transitions, 169 changer transitions 1/413 dead transitions. [2023-11-06 22:15:14,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 413 transitions, 6064 flow [2023-11-06 22:15:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:15:14,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 22:15:14,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 6518 transitions. [2023-11-06 22:15:14,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38733063941050627 [2023-11-06 22:15:14,728 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 6518 transitions. [2023-11-06 22:15:14,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 6518 transitions. [2023-11-06 22:15:14,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:14,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 6518 transitions. [2023-11-06 22:15:14,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 232.78571428571428) internal successors, (6518), 28 states have internal predecessors, (6518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:14,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 601.0) internal successors, (17429), 29 states have internal predecessors, (17429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:14,752 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 601.0) internal successors, (17429), 29 states have internal predecessors, (17429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:14,753 INFO L175 Difference]: Start difference. First operand has 243 places, 328 transitions, 4752 flow. Second operand 28 states and 6518 transitions. [2023-11-06 22:15:14,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 413 transitions, 6064 flow [2023-11-06 22:15:14,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 413 transitions, 5828 flow, removed 6 selfloop flow, removed 13 redundant places. [2023-11-06 22:15:14,899 INFO L231 Difference]: Finished difference. Result has 258 places, 338 transitions, 5063 flow [2023-11-06 22:15:14,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=4524, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5063, PETRI_PLACES=258, PETRI_TRANSITIONS=338} [2023-11-06 22:15:14,900 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 237 predicate places. [2023-11-06 22:15:14,901 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 338 transitions, 5063 flow [2023-11-06 22:15:14,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 230.38888888888889) internal successors, (4147), 18 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:14,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:14,902 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:14,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:15,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:15,108 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:15:15,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:15,108 INFO L85 PathProgramCache]: Analyzing trace with hash 110510210, now seen corresponding path program 14 times [2023-11-06 22:15:15,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:15,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881218740] [2023-11-06 22:15:15,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:15,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:15,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:15,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881218740] [2023-11-06 22:15:15,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881218740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:15,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633985373] [2023-11-06 22:15:15,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:15:15,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:15,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:15,574 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:15,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:15:15,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:15:15,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:15:15,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:15:15,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:15,930 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 91 treesize of output 59 [2023-11-06 22:15:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:15,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:16,187 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:15:16,187 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 40 treesize of output 19 [2023-11-06 22:15:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:16,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633985373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:16,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:16,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-06 22:15:16,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791000005] [2023-11-06 22:15:16,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:16,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:15:16,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:16,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:15:16,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:15:17,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 601 [2023-11-06 22:15:17,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 338 transitions, 5063 flow. Second operand has 18 states, 18 states have (on average 231.0) internal successors, (4158), 18 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:17,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:17,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 601 [2023-11-06 22:15:17,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:18,646 INFO L124 PetriNetUnfolderBase]: 780/1657 cut-off events. [2023-11-06 22:15:18,646 INFO L125 PetriNetUnfolderBase]: For 13204/13204 co-relation queries the response was YES. [2023-11-06 22:15:18,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10460 conditions, 1657 events. 780/1657 cut-off events. For 13204/13204 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 10880 event pairs, 48 based on Foata normal form. 2/1657 useless extension candidates. Maximal degree in co-relation 10383. Up to 261 conditions per place. [2023-11-06 22:15:18,663 INFO L140 encePairwiseOnDemand]: 592/601 looper letters, 185 selfloop transitions, 227 changer transitions 3/415 dead transitions. [2023-11-06 22:15:18,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 415 transitions, 6295 flow [2023-11-06 22:15:18,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:15:18,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 22:15:18,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 6308 transitions. [2023-11-06 22:15:18,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3887348246749245 [2023-11-06 22:15:18,675 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 6308 transitions. [2023-11-06 22:15:18,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 6308 transitions. [2023-11-06 22:15:18,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:18,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 6308 transitions. [2023-11-06 22:15:18,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 233.62962962962962) internal successors, (6308), 27 states have internal predecessors, (6308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:18,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 601.0) internal successors, (16828), 28 states have internal predecessors, (16828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:18,698 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 601.0) internal successors, (16828), 28 states have internal predecessors, (16828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:18,698 INFO L175 Difference]: Start difference. First operand has 258 places, 338 transitions, 5063 flow. Second operand 27 states and 6308 transitions. [2023-11-06 22:15:18,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 415 transitions, 6295 flow [2023-11-06 22:15:18,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 415 transitions, 6061 flow, removed 21 selfloop flow, removed 16 redundant places. [2023-11-06 22:15:18,857 INFO L231 Difference]: Finished difference. Result has 264 places, 341 transitions, 5347 flow [2023-11-06 22:15:18,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=4768, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5347, PETRI_PLACES=264, PETRI_TRANSITIONS=341} [2023-11-06 22:15:18,858 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 243 predicate places. [2023-11-06 22:15:18,858 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 341 transitions, 5347 flow [2023-11-06 22:15:18,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 231.0) internal successors, (4158), 18 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:18,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:18,859 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:18,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:19,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:19,059 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:15:19,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:19,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1355083701, now seen corresponding path program 15 times [2023-11-06 22:15:19,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:19,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071380731] [2023-11-06 22:15:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:19,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:19,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:19,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071380731] [2023-11-06 22:15:19,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071380731] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:19,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27446138] [2023-11-06 22:15:19,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:15:19,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:19,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:19,475 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:19,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:15:19,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:15:19,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:15:19,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:15:19,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:19,917 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 82 treesize of output 50 [2023-11-06 22:15:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:19,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:20,088 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:15:20,089 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 117 treesize of output 61 [2023-11-06 22:15:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:20,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27446138] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:20,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:20,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-06 22:15:20,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114122525] [2023-11-06 22:15:20,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:20,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:15:20,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:20,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:15:20,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:15:21,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 601 [2023-11-06 22:15:21,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 341 transitions, 5347 flow. Second operand has 19 states, 19 states have (on average 233.1578947368421) internal successors, (4430), 19 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:21,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:21,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 601 [2023-11-06 22:15:21,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:21,909 INFO L124 PetriNetUnfolderBase]: 763/1618 cut-off events. [2023-11-06 22:15:21,909 INFO L125 PetriNetUnfolderBase]: For 14572/14572 co-relation queries the response was YES. [2023-11-06 22:15:21,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10573 conditions, 1618 events. 763/1618 cut-off events. For 14572/14572 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 10523 event pairs, 142 based on Foata normal form. 4/1620 useless extension candidates. Maximal degree in co-relation 10497. Up to 582 conditions per place. [2023-11-06 22:15:21,923 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 218 selfloop transitions, 130 changer transitions 8/356 dead transitions. [2023-11-06 22:15:21,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 356 transitions, 6079 flow [2023-11-06 22:15:21,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:15:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:15:21,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2593 transitions. [2023-11-06 22:15:21,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39222507941309936 [2023-11-06 22:15:21,968 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2593 transitions. [2023-11-06 22:15:21,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2593 transitions. [2023-11-06 22:15:21,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:21,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2593 transitions. [2023-11-06 22:15:21,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 235.72727272727272) internal successors, (2593), 11 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:21,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 601.0) internal successors, (7212), 12 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:21,981 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 601.0) internal successors, (7212), 12 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:21,982 INFO L175 Difference]: Start difference. First operand has 264 places, 341 transitions, 5347 flow. Second operand 11 states and 2593 transitions. [2023-11-06 22:15:21,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 356 transitions, 6079 flow [2023-11-06 22:15:22,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 356 transitions, 5701 flow, removed 3 selfloop flow, removed 20 redundant places. [2023-11-06 22:15:22,099 INFO L231 Difference]: Finished difference. Result has 251 places, 337 transitions, 5180 flow [2023-11-06 22:15:22,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=4949, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5180, PETRI_PLACES=251, PETRI_TRANSITIONS=337} [2023-11-06 22:15:22,100 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 230 predicate places. [2023-11-06 22:15:22,100 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 337 transitions, 5180 flow [2023-11-06 22:15:22,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 233.1578947368421) internal successors, (4430), 19 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:22,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:22,101 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:22,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:22,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:22,302 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:15:22,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:22,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1246163664, now seen corresponding path program 16 times [2023-11-06 22:15:22,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:22,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920806903] [2023-11-06 22:15:22,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:22,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:22,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:22,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920806903] [2023-11-06 22:15:22,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920806903] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:22,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215237065] [2023-11-06 22:15:22,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:15:22,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:22,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:22,755 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:22,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:15:22,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:15:22,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:15:22,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:15:22,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:23,266 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 17 treesize of output 9 [2023-11-06 22:15:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:23,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:23,673 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:15:23,674 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 65 treesize of output 41 [2023-11-06 22:15:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:23,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215237065] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:23,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:23,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2023-11-06 22:15:23,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442149750] [2023-11-06 22:15:23,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:23,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:15:23,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:23,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:15:23,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:15:24,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 601 [2023-11-06 22:15:24,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 337 transitions, 5180 flow. Second operand has 20 states, 20 states have (on average 230.15) internal successors, (4603), 20 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:24,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:24,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 601 [2023-11-06 22:15:24,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:25,779 INFO L124 PetriNetUnfolderBase]: 781/1646 cut-off events. [2023-11-06 22:15:25,779 INFO L125 PetriNetUnfolderBase]: For 15623/15623 co-relation queries the response was YES. [2023-11-06 22:15:25,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10763 conditions, 1646 events. 781/1646 cut-off events. For 15623/15623 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 10711 event pairs, 148 based on Foata normal form. 20/1664 useless extension candidates. Maximal degree in co-relation 10687. Up to 557 conditions per place. [2023-11-06 22:15:25,793 INFO L140 encePairwiseOnDemand]: 592/601 looper letters, 233 selfloop transitions, 146 changer transitions 0/379 dead transitions. [2023-11-06 22:15:25,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 379 transitions, 6187 flow [2023-11-06 22:15:25,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:15:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:15:25,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4188 transitions. [2023-11-06 22:15:25,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38713255684969494 [2023-11-06 22:15:25,804 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4188 transitions. [2023-11-06 22:15:25,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4188 transitions. [2023-11-06 22:15:25,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:25,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4188 transitions. [2023-11-06 22:15:25,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 232.66666666666666) internal successors, (4188), 18 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:25,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 601.0) internal successors, (11419), 19 states have internal predecessors, (11419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:25,820 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 601.0) internal successors, (11419), 19 states have internal predecessors, (11419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:25,820 INFO L175 Difference]: Start difference. First operand has 251 places, 337 transitions, 5180 flow. Second operand 18 states and 4188 transitions. [2023-11-06 22:15:25,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 379 transitions, 6187 flow [2023-11-06 22:15:25,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 379 transitions, 5935 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-06 22:15:25,962 INFO L231 Difference]: Finished difference. Result has 258 places, 345 transitions, 5404 flow [2023-11-06 22:15:25,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=4918, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5404, PETRI_PLACES=258, PETRI_TRANSITIONS=345} [2023-11-06 22:15:25,963 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 237 predicate places. [2023-11-06 22:15:25,963 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 345 transitions, 5404 flow [2023-11-06 22:15:25,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 230.15) internal successors, (4603), 20 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:25,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:25,964 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:25,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:26,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:26,171 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:15:26,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:26,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1316350759, now seen corresponding path program 17 times [2023-11-06 22:15:26,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:26,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728450028] [2023-11-06 22:15:26,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:26,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:26,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:26,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728450028] [2023-11-06 22:15:26,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728450028] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:26,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792930274] [2023-11-06 22:15:26,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:15:26,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:26,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:26,517 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:26,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:15:26,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:15:26,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:15:26,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:15:26,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:26,906 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 112 treesize of output 72 [2023-11-06 22:15:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:26,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:27,162 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:15:27,162 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 87 treesize of output 47 [2023-11-06 22:15:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:27,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792930274] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:27,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:27,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-06 22:15:27,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311784371] [2023-11-06 22:15:27,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:27,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:15:27,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:27,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:15:27,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:15:28,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 601 [2023-11-06 22:15:28,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 345 transitions, 5404 flow. Second operand has 18 states, 18 states have (on average 231.16666666666666) internal successors, (4161), 18 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:28,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:28,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 601 [2023-11-06 22:15:28,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:28,883 INFO L124 PetriNetUnfolderBase]: 805/1726 cut-off events. [2023-11-06 22:15:28,883 INFO L125 PetriNetUnfolderBase]: For 16158/16158 co-relation queries the response was YES. [2023-11-06 22:15:28,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11440 conditions, 1726 events. 805/1726 cut-off events. For 16158/16158 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11496 event pairs, 205 based on Foata normal form. 8/1732 useless extension candidates. Maximal degree in co-relation 11361. Up to 1082 conditions per place. [2023-11-06 22:15:28,900 INFO L140 encePairwiseOnDemand]: 593/601 looper letters, 253 selfloop transitions, 124 changer transitions 0/377 dead transitions. [2023-11-06 22:15:28,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 377 transitions, 6442 flow [2023-11-06 22:15:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:15:28,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:15:28,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3035 transitions. [2023-11-06 22:15:28,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38845513887111227 [2023-11-06 22:15:28,905 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3035 transitions. [2023-11-06 22:15:28,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3035 transitions. [2023-11-06 22:15:28,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:28,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3035 transitions. [2023-11-06 22:15:28,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 233.46153846153845) internal successors, (3035), 13 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:28,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 601.0) internal successors, (8414), 14 states have internal predecessors, (8414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:28,917 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 601.0) internal successors, (8414), 14 states have internal predecessors, (8414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:28,917 INFO L175 Difference]: Start difference. First operand has 258 places, 345 transitions, 5404 flow. Second operand 13 states and 3035 transitions. [2023-11-06 22:15:28,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 377 transitions, 6442 flow [2023-11-06 22:15:29,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 377 transitions, 6342 flow, removed 21 selfloop flow, removed 10 redundant places. [2023-11-06 22:15:29,048 INFO L231 Difference]: Finished difference. Result has 263 places, 351 transitions, 5702 flow [2023-11-06 22:15:29,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=5304, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5702, PETRI_PLACES=263, PETRI_TRANSITIONS=351} [2023-11-06 22:15:29,048 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 242 predicate places. [2023-11-06 22:15:29,049 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 351 transitions, 5702 flow [2023-11-06 22:15:29,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 231.16666666666666) internal successors, (4161), 18 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:29,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:29,050 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:29,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:29,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-06 22:15:29,250 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:15:29,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:29,251 INFO L85 PathProgramCache]: Analyzing trace with hash -45090664, now seen corresponding path program 18 times [2023-11-06 22:15:29,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:29,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920022620] [2023-11-06 22:15:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:29,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:29,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:29,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920022620] [2023-11-06 22:15:29,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920022620] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:29,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255849167] [2023-11-06 22:15:29,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:15:29,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:29,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:29,709 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:29,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:15:29,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:15:29,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:15:29,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:15:29,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:30,033 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 91 treesize of output 59 [2023-11-06 22:15:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:30,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:30,274 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:15:30,274 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 62 treesize of output 38 [2023-11-06 22:15:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:30,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255849167] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:30,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:30,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-06 22:15:30,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959827151] [2023-11-06 22:15:30,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:30,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:15:30,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:30,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:15:30,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:15:31,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 601 [2023-11-06 22:15:31,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 351 transitions, 5702 flow. Second operand has 18 states, 18 states have (on average 230.16666666666666) internal successors, (4143), 18 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:31,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:31,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 601 [2023-11-06 22:15:31,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:32,100 INFO L124 PetriNetUnfolderBase]: 815/1740 cut-off events. [2023-11-06 22:15:32,100 INFO L125 PetriNetUnfolderBase]: For 17777/17777 co-relation queries the response was YES. [2023-11-06 22:15:32,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11906 conditions, 1740 events. 815/1740 cut-off events. For 17777/17777 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11600 event pairs, 316 based on Foata normal form. 12/1750 useless extension candidates. Maximal degree in co-relation 11825. Up to 1559 conditions per place. [2023-11-06 22:15:32,114 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 314 selfloop transitions, 58 changer transitions 0/372 dead transitions. [2023-11-06 22:15:32,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 372 transitions, 6571 flow [2023-11-06 22:15:32,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:15:32,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:15:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2560 transitions. [2023-11-06 22:15:32,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38723339888065345 [2023-11-06 22:15:32,118 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2560 transitions. [2023-11-06 22:15:32,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2560 transitions. [2023-11-06 22:15:32,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:32,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2560 transitions. [2023-11-06 22:15:32,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 232.72727272727272) internal successors, (2560), 11 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:32,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 601.0) internal successors, (7212), 12 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:32,124 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 601.0) internal successors, (7212), 12 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:32,124 INFO L175 Difference]: Start difference. First operand has 263 places, 351 transitions, 5702 flow. Second operand 11 states and 2560 transitions. [2023-11-06 22:15:32,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 372 transitions, 6571 flow [2023-11-06 22:15:32,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 372 transitions, 6480 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-11-06 22:15:32,259 INFO L231 Difference]: Finished difference. Result has 266 places, 354 transitions, 5789 flow [2023-11-06 22:15:32,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=5555, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5789, PETRI_PLACES=266, PETRI_TRANSITIONS=354} [2023-11-06 22:15:32,260 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 245 predicate places. [2023-11-06 22:15:32,260 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 354 transitions, 5789 flow [2023-11-06 22:15:32,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 230.16666666666666) internal successors, (4143), 18 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:32,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:32,261 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:32,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:32,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-06 22:15:32,461 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:15:32,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:32,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1105636618, now seen corresponding path program 19 times [2023-11-06 22:15:32,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:32,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504070378] [2023-11-06 22:15:32,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:32,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:32,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:32,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504070378] [2023-11-06 22:15:32,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504070378] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:32,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050655952] [2023-11-06 22:15:32,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:15:32,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:32,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:32,891 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:32,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:15:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:33,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:15:33,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:33,237 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 91 treesize of output 59 [2023-11-06 22:15:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:33,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:33,518 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:15:33,518 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 117 treesize of output 61 [2023-11-06 22:15:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:33,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050655952] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:33,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:33,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-06 22:15:33,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364277388] [2023-11-06 22:15:33,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:33,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:15:33,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:33,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:15:33,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:15:34,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 601 [2023-11-06 22:15:34,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 354 transitions, 5789 flow. Second operand has 19 states, 19 states have (on average 230.31578947368422) internal successors, (4376), 19 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:34,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:34,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 601 [2023-11-06 22:15:34,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:35,611 INFO L124 PetriNetUnfolderBase]: 827/1774 cut-off events. [2023-11-06 22:15:35,611 INFO L125 PetriNetUnfolderBase]: For 18760/18760 co-relation queries the response was YES. [2023-11-06 22:15:35,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12261 conditions, 1774 events. 827/1774 cut-off events. For 18760/18760 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 11926 event pairs, 221 based on Foata normal form. 6/1778 useless extension candidates. Maximal degree in co-relation 12178. Up to 1246 conditions per place. [2023-11-06 22:15:35,634 INFO L140 encePairwiseOnDemand]: 593/601 looper letters, 269 selfloop transitions, 121 changer transitions 0/390 dead transitions. [2023-11-06 22:15:35,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 390 transitions, 6774 flow [2023-11-06 22:15:35,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:15:35,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:15:35,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3492 transitions. [2023-11-06 22:15:35,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3873544093178037 [2023-11-06 22:15:35,639 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3492 transitions. [2023-11-06 22:15:35,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3492 transitions. [2023-11-06 22:15:35,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:35,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3492 transitions. [2023-11-06 22:15:35,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 232.8) internal successors, (3492), 15 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:35,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 601.0) internal successors, (9616), 16 states have internal predecessors, (9616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:35,652 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 601.0) internal successors, (9616), 16 states have internal predecessors, (9616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:35,652 INFO L175 Difference]: Start difference. First operand has 266 places, 354 transitions, 5789 flow. Second operand 15 states and 3492 transitions. [2023-11-06 22:15:35,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 390 transitions, 6774 flow [2023-11-06 22:15:35,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 390 transitions, 6643 flow, removed 18 selfloop flow, removed 8 redundant places. [2023-11-06 22:15:35,845 INFO L231 Difference]: Finished difference. Result has 273 places, 356 transitions, 5968 flow [2023-11-06 22:15:35,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=5658, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5968, PETRI_PLACES=273, PETRI_TRANSITIONS=356} [2023-11-06 22:15:35,846 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 252 predicate places. [2023-11-06 22:15:35,846 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 356 transitions, 5968 flow [2023-11-06 22:15:35,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 230.31578947368422) internal successors, (4376), 19 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:35,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:35,848 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:35,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:36,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-06 22:15:36,053 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:15:36,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:36,054 INFO L85 PathProgramCache]: Analyzing trace with hash -628297678, now seen corresponding path program 20 times [2023-11-06 22:15:36,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:36,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601477651] [2023-11-06 22:15:36,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:36,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:36,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:36,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601477651] [2023-11-06 22:15:36,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601477651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:36,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018951442] [2023-11-06 22:15:36,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:15:36,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:36,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:36,616 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:36,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:15:36,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:15:36,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:15:36,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:15:36,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:37,015 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 61 treesize of output 37 [2023-11-06 22:15:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:37,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:37,186 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:15:37,187 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 117 treesize of output 61 [2023-11-06 22:15:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:37,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018951442] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:37,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:37,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2023-11-06 22:15:37,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221870193] [2023-11-06 22:15:37,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:37,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:15:37,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:37,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:15:37,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:15:38,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 601 [2023-11-06 22:15:38,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 356 transitions, 5968 flow. Second operand has 20 states, 20 states have (on average 229.9) internal successors, (4598), 20 states have internal predecessors, (4598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:38,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:38,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 601 [2023-11-06 22:15:38,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:39,593 INFO L124 PetriNetUnfolderBase]: 825/1772 cut-off events. [2023-11-06 22:15:39,593 INFO L125 PetriNetUnfolderBase]: For 19206/19206 co-relation queries the response was YES. [2023-11-06 22:15:39,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12448 conditions, 1772 events. 825/1772 cut-off events. For 19206/19206 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 11914 event pairs, 242 based on Foata normal form. 2/1772 useless extension candidates. Maximal degree in co-relation 12364. Up to 1311 conditions per place. [2023-11-06 22:15:39,608 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 259 selfloop transitions, 108 changer transitions 4/371 dead transitions. [2023-11-06 22:15:39,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 371 transitions, 6732 flow [2023-11-06 22:15:39,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:15:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:15:39,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3246 transitions. [2023-11-06 22:15:39,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3857855954361778 [2023-11-06 22:15:39,612 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3246 transitions. [2023-11-06 22:15:39,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3246 transitions. [2023-11-06 22:15:39,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:39,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3246 transitions. [2023-11-06 22:15:39,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 231.85714285714286) internal successors, (3246), 14 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:39,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 601.0) internal successors, (9015), 15 states have internal predecessors, (9015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:39,622 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 601.0) internal successors, (9015), 15 states have internal predecessors, (9015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:39,622 INFO L175 Difference]: Start difference. First operand has 273 places, 356 transitions, 5968 flow. Second operand 14 states and 3246 transitions. [2023-11-06 22:15:39,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 371 transitions, 6732 flow [2023-11-06 22:15:39,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 371 transitions, 6568 flow, removed 15 selfloop flow, removed 11 redundant places. [2023-11-06 22:15:39,804 INFO L231 Difference]: Finished difference. Result has 275 places, 353 transitions, 5975 flow [2023-11-06 22:15:39,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5975, PETRI_PLACES=275, PETRI_TRANSITIONS=353} [2023-11-06 22:15:39,805 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2023-11-06 22:15:39,805 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 353 transitions, 5975 flow [2023-11-06 22:15:39,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 229.9) internal successors, (4598), 20 states have internal predecessors, (4598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:39,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:39,806 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:39,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:40,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-06 22:15:40,006 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:15:40,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:40,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1026077081, now seen corresponding path program 21 times [2023-11-06 22:15:40,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:40,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886337906] [2023-11-06 22:15:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:40,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:40,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:40,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886337906] [2023-11-06 22:15:40,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886337906] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:40,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578040315] [2023-11-06 22:15:40,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:15:40,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:40,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:40,349 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:40,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:15:40,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:15:40,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:15:40,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:15:40,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:40,677 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 17 treesize of output 9 [2023-11-06 22:15:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:40,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:40,888 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:15:40,888 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 62 treesize of output 38 [2023-11-06 22:15:40,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:40,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578040315] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:40,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:40,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-06 22:15:40,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675006662] [2023-11-06 22:15:40,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:40,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:15:40,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:40,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:15:40,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:15:41,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 601 [2023-11-06 22:15:41,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 353 transitions, 5975 flow. Second operand has 18 states, 18 states have (on average 230.11111111111111) internal successors, (4142), 18 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:41,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:41,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 601 [2023-11-06 22:15:41,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:42,709 INFO L124 PetriNetUnfolderBase]: 821/1762 cut-off events. [2023-11-06 22:15:42,709 INFO L125 PetriNetUnfolderBase]: For 20053/20053 co-relation queries the response was YES. [2023-11-06 22:15:42,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12473 conditions, 1762 events. 821/1762 cut-off events. For 20053/20053 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 11807 event pairs, 337 based on Foata normal form. 10/1770 useless extension candidates. Maximal degree in co-relation 12389. Up to 1646 conditions per place. [2023-11-06 22:15:42,726 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 322 selfloop transitions, 42 changer transitions 0/364 dead transitions. [2023-11-06 22:15:42,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 364 transitions, 6809 flow [2023-11-06 22:15:42,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:15:42,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:15:42,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2091 transitions. [2023-11-06 22:15:42,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3865779256794232 [2023-11-06 22:15:42,729 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2091 transitions. [2023-11-06 22:15:42,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2091 transitions. [2023-11-06 22:15:42,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:42,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2091 transitions. [2023-11-06 22:15:42,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 232.33333333333334) internal successors, (2091), 9 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:42,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 601.0) internal successors, (6010), 10 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:42,738 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 601.0) internal successors, (6010), 10 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:42,738 INFO L175 Difference]: Start difference. First operand has 275 places, 353 transitions, 5975 flow. Second operand 9 states and 2091 transitions. [2023-11-06 22:15:42,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 364 transitions, 6809 flow [2023-11-06 22:15:42,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 364 transitions, 6585 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-11-06 22:15:42,966 INFO L231 Difference]: Finished difference. Result has 270 places, 355 transitions, 5923 flow [2023-11-06 22:15:42,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=5724, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5923, PETRI_PLACES=270, PETRI_TRANSITIONS=355} [2023-11-06 22:15:42,967 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 249 predicate places. [2023-11-06 22:15:42,967 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 355 transitions, 5923 flow [2023-11-06 22:15:42,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 230.11111111111111) internal successors, (4142), 18 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:42,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:42,968 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:42,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:43,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-06 22:15:43,171 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:15:43,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:43,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1280182087, now seen corresponding path program 22 times [2023-11-06 22:15:43,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:43,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125404999] [2023-11-06 22:15:43,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:43,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:43,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:43,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125404999] [2023-11-06 22:15:43,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125404999] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:43,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987933961] [2023-11-06 22:15:43,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:15:43,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:43,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:43,581 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:43,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:15:43,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:15:43,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:15:43,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:15:43,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:43,926 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 112 treesize of output 72 [2023-11-06 22:15:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:43,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:44,185 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:15:44,186 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 62 treesize of output 38 [2023-11-06 22:15:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:44,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987933961] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:44,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:44,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-06 22:15:44,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481379712] [2023-11-06 22:15:44,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:44,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:15:44,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:44,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:15:44,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:15:44,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 601 [2023-11-06 22:15:44,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 355 transitions, 5923 flow. Second operand has 19 states, 19 states have (on average 230.21052631578948) internal successors, (4374), 19 states have internal predecessors, (4374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:44,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:44,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 601 [2023-11-06 22:15:44,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:45,762 INFO L124 PetriNetUnfolderBase]: 819/1764 cut-off events. [2023-11-06 22:15:45,762 INFO L125 PetriNetUnfolderBase]: For 19222/19222 co-relation queries the response was YES. [2023-11-06 22:15:45,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12334 conditions, 1764 events. 819/1764 cut-off events. For 19222/19222 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 11882 event pairs, 324 based on Foata normal form. 12/1774 useless extension candidates. Maximal degree in co-relation 12249. Up to 1593 conditions per place. [2023-11-06 22:15:45,779 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 318 selfloop transitions, 52 changer transitions 4/374 dead transitions. [2023-11-06 22:15:45,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 374 transitions, 6804 flow [2023-11-06 22:15:45,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:15:45,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:15:45,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2791 transitions. [2023-11-06 22:15:45,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386993899057127 [2023-11-06 22:15:45,783 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2791 transitions. [2023-11-06 22:15:45,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2791 transitions. [2023-11-06 22:15:45,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:45,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2791 transitions. [2023-11-06 22:15:45,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 232.58333333333334) internal successors, (2791), 12 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:45,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 601.0) internal successors, (7813), 13 states have internal predecessors, (7813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:45,794 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 601.0) internal successors, (7813), 13 states have internal predecessors, (7813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:45,794 INFO L175 Difference]: Start difference. First operand has 270 places, 355 transitions, 5923 flow. Second operand 12 states and 2791 transitions. [2023-11-06 22:15:45,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 374 transitions, 6804 flow [2023-11-06 22:15:45,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 374 transitions, 6702 flow, removed 14 selfloop flow, removed 8 redundant places. [2023-11-06 22:15:45,987 INFO L231 Difference]: Finished difference. Result has 272 places, 354 transitions, 5982 flow [2023-11-06 22:15:45,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=5770, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5982, PETRI_PLACES=272, PETRI_TRANSITIONS=354} [2023-11-06 22:15:45,988 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 251 predicate places. [2023-11-06 22:15:45,988 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 354 transitions, 5982 flow [2023-11-06 22:15:45,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 230.21052631578948) internal successors, (4374), 19 states have internal predecessors, (4374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:45,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:45,990 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:45,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:46,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-06 22:15:46,190 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:15:46,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:46,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1938856098, now seen corresponding path program 23 times [2023-11-06 22:15:46,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:46,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448627453] [2023-11-06 22:15:46,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:46,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:46,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:46,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448627453] [2023-11-06 22:15:46,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448627453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:46,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859526354] [2023-11-06 22:15:46,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:15:46,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:46,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:46,579 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:46,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:15:46,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:15:46,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:15:46,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:15:46,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:46,927 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 91 treesize of output 59 [2023-11-06 22:15:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:46,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:47,169 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:15:47,169 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 117 treesize of output 61 [2023-11-06 22:15:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:47,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859526354] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:47,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:47,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2023-11-06 22:15:47,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858503315] [2023-11-06 22:15:47,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:47,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:15:47,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:47,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:15:47,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:15:48,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 601 [2023-11-06 22:15:48,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 354 transitions, 5982 flow. Second operand has 19 states, 19 states have (on average 229.89473684210526) internal successors, (4368), 19 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:48,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:48,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 601 [2023-11-06 22:15:48,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:49,237 INFO L124 PetriNetUnfolderBase]: 812/1737 cut-off events. [2023-11-06 22:15:49,237 INFO L125 PetriNetUnfolderBase]: For 19951/19951 co-relation queries the response was YES. [2023-11-06 22:15:49,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12245 conditions, 1737 events. 812/1737 cut-off events. For 19951/19951 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11557 event pairs, 221 based on Foata normal form. 2/1737 useless extension candidates. Maximal degree in co-relation 12159. Up to 1246 conditions per place. [2023-11-06 22:15:49,253 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 255 selfloop transitions, 114 changer transitions 2/371 dead transitions. [2023-11-06 22:15:49,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 371 transitions, 6782 flow [2023-11-06 22:15:49,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:15:49,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:15:49,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2788 transitions. [2023-11-06 22:15:49,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3865779256794232 [2023-11-06 22:15:49,259 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2788 transitions. [2023-11-06 22:15:49,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2788 transitions. [2023-11-06 22:15:49,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:49,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2788 transitions. [2023-11-06 22:15:49,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 232.33333333333334) internal successors, (2788), 12 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:49,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 601.0) internal successors, (7813), 13 states have internal predecessors, (7813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:49,269 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 601.0) internal successors, (7813), 13 states have internal predecessors, (7813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:49,269 INFO L175 Difference]: Start difference. First operand has 272 places, 354 transitions, 5982 flow. Second operand 12 states and 2788 transitions. [2023-11-06 22:15:49,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 371 transitions, 6782 flow [2023-11-06 22:15:49,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 371 transitions, 6677 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-11-06 22:15:49,479 INFO L231 Difference]: Finished difference. Result has 274 places, 352 transitions, 6069 flow [2023-11-06 22:15:49,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=5858, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6069, PETRI_PLACES=274, PETRI_TRANSITIONS=352} [2023-11-06 22:15:49,480 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 253 predicate places. [2023-11-06 22:15:49,480 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 352 transitions, 6069 flow [2023-11-06 22:15:49,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 229.89473684210526) internal successors, (4368), 19 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:49,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:49,481 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:49,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:49,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-06 22:15:49,682 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:15:49,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:49,682 INFO L85 PathProgramCache]: Analyzing trace with hash -164081229, now seen corresponding path program 24 times [2023-11-06 22:15:49,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:49,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490082545] [2023-11-06 22:15:49,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:49,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:50,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:50,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490082545] [2023-11-06 22:15:50,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490082545] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:50,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781568368] [2023-11-06 22:15:50,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:15:50,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:50,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:50,155 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:50,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:15:50,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:15:50,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:15:50,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:15:50,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:50,535 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 91 treesize of output 59 [2023-11-06 22:15:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:50,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:50,802 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:15:50,803 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 62 treesize of output 38 [2023-11-06 22:15:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:50,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781568368] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:50,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:50,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-06 22:15:50,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124350658] [2023-11-06 22:15:50,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:50,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:15:50,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:50,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:15:50,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:15:51,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 601 [2023-11-06 22:15:51,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 352 transitions, 6069 flow. Second operand has 18 states, 18 states have (on average 230.0) internal successors, (4140), 18 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:51,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:51,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 601 [2023-11-06 22:15:51,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:52,584 INFO L124 PetriNetUnfolderBase]: 807/1714 cut-off events. [2023-11-06 22:15:52,584 INFO L125 PetriNetUnfolderBase]: For 20490/20490 co-relation queries the response was YES. [2023-11-06 22:15:52,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12315 conditions, 1714 events. 807/1714 cut-off events. For 20490/20490 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11319 event pairs, 316 based on Foata normal form. 6/1718 useless extension candidates. Maximal degree in co-relation 12229. Up to 1575 conditions per place. [2023-11-06 22:15:52,600 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 311 selfloop transitions, 52 changer transitions 0/363 dead transitions. [2023-11-06 22:15:52,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 363 transitions, 6818 flow [2023-11-06 22:15:52,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:15:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:15:52,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2554 transitions. [2023-11-06 22:15:52,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3863258206020269 [2023-11-06 22:15:52,603 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2554 transitions. [2023-11-06 22:15:52,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2554 transitions. [2023-11-06 22:15:52,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:52,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2554 transitions. [2023-11-06 22:15:52,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 232.1818181818182) internal successors, (2554), 11 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:52,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 601.0) internal successors, (7212), 12 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:52,609 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 601.0) internal successors, (7212), 12 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:52,609 INFO L175 Difference]: Start difference. First operand has 274 places, 352 transitions, 6069 flow. Second operand 11 states and 2554 transitions. [2023-11-06 22:15:52,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 363 transitions, 6818 flow [2023-11-06 22:15:52,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 363 transitions, 6584 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-11-06 22:15:52,780 INFO L231 Difference]: Finished difference. Result has 270 places, 351 transitions, 5907 flow [2023-11-06 22:15:52,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=5743, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5907, PETRI_PLACES=270, PETRI_TRANSITIONS=351} [2023-11-06 22:15:52,781 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 249 predicate places. [2023-11-06 22:15:52,781 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 351 transitions, 5907 flow [2023-11-06 22:15:52,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 230.0) internal successors, (4140), 18 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:52,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:52,782 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:52,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:52,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-06 22:15:52,988 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:15:52,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:52,989 INFO L85 PathProgramCache]: Analyzing trace with hash 561983946, now seen corresponding path program 25 times [2023-11-06 22:15:52,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:52,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119191927] [2023-11-06 22:15:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:52,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:53,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:53,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119191927] [2023-11-06 22:15:53,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119191927] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:53,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810662447] [2023-11-06 22:15:53,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:15:53,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:53,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:53,525 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:53,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:15:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:53,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:15:53,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:53,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:53,941 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 25 treesize of output 18 [2023-11-06 22:15:54,038 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 17 treesize of output 9 [2023-11-06 22:15:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:54,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:54,262 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1079 (Array Int Int))) (not (= c_~name_1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1079) c_~nondet_0~0.base) c_~nondet_0~0.offset)))) (forall ((v_ArrVal_1079 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1079) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_2~0)))) is different from false [2023-11-06 22:15:54,323 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:15:54,324 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 70 treesize of output 54 [2023-11-06 22:15:54,328 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 39 treesize of output 37 [2023-11-06 22:15:54,333 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 37 treesize of output 35 [2023-11-06 22:15:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:54,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810662447] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:54,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:54,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 22:15:54,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417168525] [2023-11-06 22:15:54,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:54,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:15:54,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:54,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:15:54,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=463, Unknown=1, NotChecked=44, Total=600 [2023-11-06 22:15:54,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 601 [2023-11-06 22:15:54,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 351 transitions, 5907 flow. Second operand has 25 states, 25 states have (on average 203.84) internal successors, (5096), 25 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:54,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:54,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 601 [2023-11-06 22:15:54,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:55,936 INFO L124 PetriNetUnfolderBase]: 826/1749 cut-off events. [2023-11-06 22:15:55,936 INFO L125 PetriNetUnfolderBase]: For 19178/19178 co-relation queries the response was YES. [2023-11-06 22:15:55,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12447 conditions, 1749 events. 826/1749 cut-off events. For 19178/19178 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 11597 event pairs, 79 based on Foata normal form. 10/1757 useless extension candidates. Maximal degree in co-relation 12361. Up to 637 conditions per place. [2023-11-06 22:15:55,952 INFO L140 encePairwiseOnDemand]: 593/601 looper letters, 217 selfloop transitions, 184 changer transitions 0/401 dead transitions. [2023-11-06 22:15:55,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 401 transitions, 7138 flow [2023-11-06 22:15:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:15:55,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:15:55,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3110 transitions. [2023-11-06 22:15:55,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3449805879090405 [2023-11-06 22:15:55,956 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3110 transitions. [2023-11-06 22:15:55,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3110 transitions. [2023-11-06 22:15:55,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:55,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3110 transitions. [2023-11-06 22:15:55,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 207.33333333333334) internal successors, (3110), 15 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:55,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 601.0) internal successors, (9616), 16 states have internal predecessors, (9616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:55,965 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 601.0) internal successors, (9616), 16 states have internal predecessors, (9616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:55,966 INFO L175 Difference]: Start difference. First operand has 270 places, 351 transitions, 5907 flow. Second operand 15 states and 3110 transitions. [2023-11-06 22:15:55,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 401 transitions, 7138 flow [2023-11-06 22:15:56,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 401 transitions, 7034 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-11-06 22:15:56,134 INFO L231 Difference]: Finished difference. Result has 277 places, 358 transitions, 6392 flow [2023-11-06 22:15:56,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=5803, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6392, PETRI_PLACES=277, PETRI_TRANSITIONS=358} [2023-11-06 22:15:56,135 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 256 predicate places. [2023-11-06 22:15:56,135 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 358 transitions, 6392 flow [2023-11-06 22:15:56,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 203.84) internal successors, (5096), 25 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:56,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:56,137 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:56,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:56,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-06 22:15:56,342 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:15:56,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:56,342 INFO L85 PathProgramCache]: Analyzing trace with hash 248784087, now seen corresponding path program 26 times [2023-11-06 22:15:56,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:56,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715688019] [2023-11-06 22:15:56,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:56,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:56,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:56,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:56,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715688019] [2023-11-06 22:15:56,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715688019] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:56,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36160798] [2023-11-06 22:15:56,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:15:56,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:56,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:56,955 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:56,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:15:57,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:15:57,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:15:57,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:15:57,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:57,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:57,309 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 54 treesize of output 43 [2023-11-06 22:15:57,461 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 82 treesize of output 50 [2023-11-06 22:15:57,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:57,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:57,748 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:15:57,749 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 137 treesize of output 89 [2023-11-06 22:15:57,757 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 19 treesize of output 15 [2023-11-06 22:15:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:15:57,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36160798] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:57,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:57,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 22:15:57,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886477080] [2023-11-06 22:15:57,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:57,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:15:57,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:57,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:15:57,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=509, Unknown=1, NotChecked=0, Total=600 [2023-11-06 22:15:58,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 601 [2023-11-06 22:15:58,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 358 transitions, 6392 flow. Second operand has 25 states, 25 states have (on average 203.92) internal successors, (5098), 25 states have internal predecessors, (5098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:58,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:58,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 601 [2023-11-06 22:15:58,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:59,788 INFO L124 PetriNetUnfolderBase]: 825/1752 cut-off events. [2023-11-06 22:15:59,788 INFO L125 PetriNetUnfolderBase]: For 22342/22342 co-relation queries the response was YES. [2023-11-06 22:15:59,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12956 conditions, 1752 events. 825/1752 cut-off events. For 22342/22342 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 11686 event pairs, 248 based on Foata normal form. 4/1754 useless extension candidates. Maximal degree in co-relation 12868. Up to 1203 conditions per place. [2023-11-06 22:15:59,804 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 274 selfloop transitions, 94 changer transitions 12/380 dead transitions. [2023-11-06 22:15:59,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 380 transitions, 7243 flow [2023-11-06 22:15:59,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:15:59,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:15:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1868 transitions. [2023-11-06 22:15:59,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.345350342022555 [2023-11-06 22:15:59,807 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1868 transitions. [2023-11-06 22:15:59,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1868 transitions. [2023-11-06 22:15:59,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:59,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1868 transitions. [2023-11-06 22:15:59,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.55555555555554) internal successors, (1868), 9 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:59,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 601.0) internal successors, (6010), 10 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:59,812 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 601.0) internal successors, (6010), 10 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:59,812 INFO L175 Difference]: Start difference. First operand has 277 places, 358 transitions, 6392 flow. Second operand 9 states and 1868 transitions. [2023-11-06 22:15:59,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 380 transitions, 7243 flow [2023-11-06 22:15:59,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 380 transitions, 6865 flow, removed 31 selfloop flow, removed 12 redundant places. [2023-11-06 22:15:59,985 INFO L231 Difference]: Finished difference. Result has 274 places, 353 transitions, 6100 flow [2023-11-06 22:15:59,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=6014, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6100, PETRI_PLACES=274, PETRI_TRANSITIONS=353} [2023-11-06 22:15:59,986 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 253 predicate places. [2023-11-06 22:15:59,986 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 353 transitions, 6100 flow [2023-11-06 22:15:59,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 203.92) internal successors, (5098), 25 states have internal predecessors, (5098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:59,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:59,987 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:59,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-06 22:16:00,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-06 22:16:00,188 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:16:00,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:00,188 INFO L85 PathProgramCache]: Analyzing trace with hash 865722240, now seen corresponding path program 27 times [2023-11-06 22:16:00,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:00,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275095314] [2023-11-06 22:16:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:00,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:00,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:00,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275095314] [2023-11-06 22:16:00,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275095314] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:00,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917110897] [2023-11-06 22:16:00,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:16:00,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:00,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:00,914 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:00,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:16:01,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:16:01,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:16:01,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:16:01,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:01,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:01,339 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 54 treesize of output 43 [2023-11-06 22:16:01,626 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 17 treesize of output 9 [2023-11-06 22:16:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:01,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:02,186 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:16:02,187 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 74 treesize of output 58 [2023-11-06 22:16:02,192 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 43 treesize of output 41 [2023-11-06 22:16:02,197 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 41 treesize of output 39 [2023-11-06 22:16:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:02,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917110897] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:02,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:16:02,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 28 [2023-11-06 22:16:02,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915771140] [2023-11-06 22:16:02,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:02,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:16:02,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:02,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:16:02,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=694, Unknown=2, NotChecked=0, Total=812 [2023-11-06 22:16:03,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 601 [2023-11-06 22:16:03,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 353 transitions, 6100 flow. Second operand has 29 states, 29 states have (on average 194.72413793103448) internal successors, (5647), 29 states have internal predecessors, (5647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:03,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:03,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 601 [2023-11-06 22:16:03,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:05,632 INFO L124 PetriNetUnfolderBase]: 859/1811 cut-off events. [2023-11-06 22:16:05,632 INFO L125 PetriNetUnfolderBase]: For 21511/21511 co-relation queries the response was YES. [2023-11-06 22:16:05,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13198 conditions, 1811 events. 859/1811 cut-off events. For 21511/21511 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 12166 event pairs, 33 based on Foata normal form. 20/1829 useless extension candidates. Maximal degree in co-relation 13112. Up to 394 conditions per place. [2023-11-06 22:16:05,655 INFO L140 encePairwiseOnDemand]: 593/601 looper letters, 217 selfloop transitions, 228 changer transitions 1/446 dead transitions. [2023-11-06 22:16:05,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 446 transitions, 7810 flow [2023-11-06 22:16:05,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:16:05,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 22:16:05,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4953 transitions. [2023-11-06 22:16:05,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32965058236272876 [2023-11-06 22:16:05,660 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4953 transitions. [2023-11-06 22:16:05,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4953 transitions. [2023-11-06 22:16:05,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:05,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4953 transitions. [2023-11-06 22:16:05,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 198.12) internal successors, (4953), 25 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:05,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 601.0) internal successors, (15626), 26 states have internal predecessors, (15626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:05,672 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 601.0) internal successors, (15626), 26 states have internal predecessors, (15626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:05,672 INFO L175 Difference]: Start difference. First operand has 274 places, 353 transitions, 6100 flow. Second operand 25 states and 4953 transitions. [2023-11-06 22:16:05,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 446 transitions, 7810 flow [2023-11-06 22:16:05,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 446 transitions, 7637 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-11-06 22:16:05,862 INFO L231 Difference]: Finished difference. Result has 295 places, 378 transitions, 6971 flow [2023-11-06 22:16:05,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=5900, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6971, PETRI_PLACES=295, PETRI_TRANSITIONS=378} [2023-11-06 22:16:05,863 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 274 predicate places. [2023-11-06 22:16:05,863 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 378 transitions, 6971 flow [2023-11-06 22:16:05,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 194.72413793103448) internal successors, (5647), 29 states have internal predecessors, (5647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:05,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:05,864 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:05,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:06,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-06 22:16:06,070 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:16:06,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:06,071 INFO L85 PathProgramCache]: Analyzing trace with hash 241764153, now seen corresponding path program 28 times [2023-11-06 22:16:06,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:06,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951040629] [2023-11-06 22:16:06,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:06,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:06,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:06,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951040629] [2023-11-06 22:16:06,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951040629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:06,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516537605] [2023-11-06 22:16:06,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:16:06,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:06,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:06,529 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:06,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 22:16:06,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:16:06,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:16:06,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:16:06,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:06,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:06,890 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 54 treesize of output 43 [2023-11-06 22:16:07,073 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 91 treesize of output 59 [2023-11-06 22:16:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:07,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:07,445 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:16:07,446 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 107 treesize of output 75 [2023-11-06 22:16:07,453 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 19 treesize of output 15 [2023-11-06 22:16:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:07,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516537605] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:07,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:16:07,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-06 22:16:07,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086834225] [2023-11-06 22:16:07,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:07,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:16:07,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:07,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:16:07,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=554, Unknown=1, NotChecked=0, Total=650 [2023-11-06 22:16:10,189 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 22:16:11,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 601 [2023-11-06 22:16:11,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 378 transitions, 6971 flow. Second operand has 26 states, 26 states have (on average 203.84615384615384) internal successors, (5300), 26 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:11,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:11,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 601 [2023-11-06 22:16:11,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:12,403 INFO L124 PetriNetUnfolderBase]: 847/1799 cut-off events. [2023-11-06 22:16:12,403 INFO L125 PetriNetUnfolderBase]: For 23899/23899 co-relation queries the response was YES. [2023-11-06 22:16:12,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13697 conditions, 1799 events. 847/1799 cut-off events. For 23899/23899 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12123 event pairs, 251 based on Foata normal form. 12/1809 useless extension candidates. Maximal degree in co-relation 13607. Up to 1292 conditions per place. [2023-11-06 22:16:12,419 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 320 selfloop transitions, 90 changer transitions 5/415 dead transitions. [2023-11-06 22:16:12,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 415 transitions, 7965 flow [2023-11-06 22:16:12,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:16:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:16:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2291 transitions. [2023-11-06 22:16:12,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3465436393888973 [2023-11-06 22:16:12,422 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2291 transitions. [2023-11-06 22:16:12,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2291 transitions. [2023-11-06 22:16:12,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:12,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2291 transitions. [2023-11-06 22:16:12,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 208.27272727272728) internal successors, (2291), 11 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:12,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 601.0) internal successors, (7212), 12 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:12,429 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 601.0) internal successors, (7212), 12 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:12,429 INFO L175 Difference]: Start difference. First operand has 295 places, 378 transitions, 6971 flow. Second operand 11 states and 2291 transitions. [2023-11-06 22:16:12,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 415 transitions, 7965 flow [2023-11-06 22:16:12,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 415 transitions, 7614 flow, removed 67 selfloop flow, removed 13 redundant places. [2023-11-06 22:16:12,611 INFO L231 Difference]: Finished difference. Result has 293 places, 377 transitions, 6776 flow [2023-11-06 22:16:12,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=6606, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6776, PETRI_PLACES=293, PETRI_TRANSITIONS=377} [2023-11-06 22:16:12,611 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 272 predicate places. [2023-11-06 22:16:12,612 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 377 transitions, 6776 flow [2023-11-06 22:16:12,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 203.84615384615384) internal successors, (5300), 26 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:12,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:12,612 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:12,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:12,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:12,813 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:16:12,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:12,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1202479020, now seen corresponding path program 29 times [2023-11-06 22:16:12,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:12,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757306678] [2023-11-06 22:16:12,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:12,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:13,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:13,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757306678] [2023-11-06 22:16:13,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757306678] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:13,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174377358] [2023-11-06 22:16:13,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:16:13,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:13,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:13,312 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:13,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 22:16:13,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:16:13,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:16:13,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:16:13,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:13,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:13,688 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 54 treesize of output 43 [2023-11-06 22:16:13,875 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 91 treesize of output 59 [2023-11-06 22:16:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:13,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:14,275 WARN L839 $PredicateComparison]: unable to prove that (or (= c_~name_1~0 c_~name_2~0) (and (forall ((v_ArrVal_1211 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1211) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_1~0))) (forall ((v_ArrVal_1211 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1211) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_2~0)))) (not (= 0 c_~break_6~0))) is different from false [2023-11-06 22:16:14,295 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:16:14,295 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 70 treesize of output 54 [2023-11-06 22:16:14,301 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 39 treesize of output 37 [2023-11-06 22:16:14,306 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 37 treesize of output 35 [2023-11-06 22:16:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:14,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174377358] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:14,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:16:14,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-06 22:16:14,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404550509] [2023-11-06 22:16:14,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:14,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:16:14,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:14,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:16:14,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=521, Unknown=1, NotChecked=46, Total=650 [2023-11-06 22:16:14,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 601 [2023-11-06 22:16:14,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 377 transitions, 6776 flow. Second operand has 26 states, 26 states have (on average 203.69230769230768) internal successors, (5296), 26 states have internal predecessors, (5296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:14,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:14,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 601 [2023-11-06 22:16:14,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:16,648 INFO L124 PetriNetUnfolderBase]: 861/1808 cut-off events. [2023-11-06 22:16:16,648 INFO L125 PetriNetUnfolderBase]: For 21372/21372 co-relation queries the response was YES. [2023-11-06 22:16:16,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13722 conditions, 1808 events. 861/1808 cut-off events. For 21372/21372 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12081 event pairs, 26 based on Foata normal form. 6/1812 useless extension candidates. Maximal degree in co-relation 13635. Up to 546 conditions per place. [2023-11-06 22:16:16,666 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 235 selfloop transitions, 213 changer transitions 0/448 dead transitions. [2023-11-06 22:16:16,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 448 transitions, 8217 flow [2023-11-06 22:16:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:16:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:16:16,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4147 transitions. [2023-11-06 22:16:16,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34500831946755406 [2023-11-06 22:16:16,671 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4147 transitions. [2023-11-06 22:16:16,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4147 transitions. [2023-11-06 22:16:16,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:16,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4147 transitions. [2023-11-06 22:16:16,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 207.35) internal successors, (4147), 20 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:16,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 601.0) internal successors, (12621), 21 states have internal predecessors, (12621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:16,680 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 601.0) internal successors, (12621), 21 states have internal predecessors, (12621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:16,680 INFO L175 Difference]: Start difference. First operand has 293 places, 377 transitions, 6776 flow. Second operand 20 states and 4147 transitions. [2023-11-06 22:16:16,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 448 transitions, 8217 flow [2023-11-06 22:16:16,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 448 transitions, 8091 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-11-06 22:16:16,862 INFO L231 Difference]: Finished difference. Result has 305 places, 386 transitions, 7343 flow [2023-11-06 22:16:16,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=6603, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7343, PETRI_PLACES=305, PETRI_TRANSITIONS=386} [2023-11-06 22:16:16,863 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 284 predicate places. [2023-11-06 22:16:16,864 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 386 transitions, 7343 flow [2023-11-06 22:16:16,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 203.69230769230768) internal successors, (5296), 26 states have internal predecessors, (5296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:16,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:16,865 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:16,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:17,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:17,071 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:16:17,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:17,071 INFO L85 PathProgramCache]: Analyzing trace with hash -771584787, now seen corresponding path program 30 times [2023-11-06 22:16:17,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:17,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614560568] [2023-11-06 22:16:17,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:17,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:17,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:17,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614560568] [2023-11-06 22:16:17,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614560568] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:17,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846294228] [2023-11-06 22:16:17,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:16:17,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:17,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:17,596 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:17,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 22:16:17,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:16:17,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:16:17,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:16:17,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:18,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:18,032 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 54 treesize of output 43 [2023-11-06 22:16:18,283 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 61 treesize of output 37 [2023-11-06 22:16:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:18,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:18,629 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:16:18,629 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 137 treesize of output 89 [2023-11-06 22:16:18,640 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 19 treesize of output 15 [2023-11-06 22:16:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:18,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846294228] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:18,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:16:18,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-06 22:16:18,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253546446] [2023-11-06 22:16:18,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:18,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:16:18,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:18,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:16:18,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=548, Unknown=1, NotChecked=0, Total=650 [2023-11-06 22:16:20,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 601 [2023-11-06 22:16:20,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 386 transitions, 7343 flow. Second operand has 26 states, 26 states have (on average 203.69230769230768) internal successors, (5296), 26 states have internal predecessors, (5296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:20,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:20,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 601 [2023-11-06 22:16:20,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:21,432 INFO L124 PetriNetUnfolderBase]: 845/1772 cut-off events. [2023-11-06 22:16:21,432 INFO L125 PetriNetUnfolderBase]: For 25202/25202 co-relation queries the response was YES. [2023-11-06 22:16:21,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14163 conditions, 1772 events. 845/1772 cut-off events. For 25202/25202 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11733 event pairs, 152 based on Foata normal form. 4/1774 useless extension candidates. Maximal degree in co-relation 14076. Up to 827 conditions per place. [2023-11-06 22:16:21,450 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 246 selfloop transitions, 150 changer transitions 9/405 dead transitions. [2023-11-06 22:16:21,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 405 transitions, 8176 flow [2023-11-06 22:16:21,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:16:21,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:16:21,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2280 transitions. [2023-11-06 22:16:21,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.344879745878082 [2023-11-06 22:16:21,453 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2280 transitions. [2023-11-06 22:16:21,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2280 transitions. [2023-11-06 22:16:21,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:21,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2280 transitions. [2023-11-06 22:16:21,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 207.27272727272728) internal successors, (2280), 11 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:21,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 601.0) internal successors, (7212), 12 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:21,459 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 601.0) internal successors, (7212), 12 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:21,459 INFO L175 Difference]: Start difference. First operand has 305 places, 386 transitions, 7343 flow. Second operand 11 states and 2280 transitions. [2023-11-06 22:16:21,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 405 transitions, 8176 flow [2023-11-06 22:16:21,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 405 transitions, 7938 flow, removed 24 selfloop flow, removed 13 redundant places. [2023-11-06 22:16:21,700 INFO L231 Difference]: Finished difference. Result has 302 places, 381 transitions, 7318 flow [2023-11-06 22:16:21,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7318, PETRI_PLACES=302, PETRI_TRANSITIONS=381} [2023-11-06 22:16:21,701 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 281 predicate places. [2023-11-06 22:16:21,701 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 381 transitions, 7318 flow [2023-11-06 22:16:21,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 203.69230769230768) internal successors, (5296), 26 states have internal predecessors, (5296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:21,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:21,702 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:21,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:21,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:21,902 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:16:21,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:21,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1913614992, now seen corresponding path program 31 times [2023-11-06 22:16:21,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:21,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377907425] [2023-11-06 22:16:21,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:21,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:22,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:22,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377907425] [2023-11-06 22:16:22,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377907425] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:22,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194432072] [2023-11-06 22:16:22,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:16:22,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:22,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:22,327 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:22,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 22:16:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:22,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:16:22,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:22,755 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 82 treesize of output 50 [2023-11-06 22:16:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:22,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:22,936 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:16:22,936 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 79 treesize of output 42 [2023-11-06 22:16:22,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:22,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194432072] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:22,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:16:22,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-06 22:16:22,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849898705] [2023-11-06 22:16:22,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:22,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:16:22,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:22,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:16:22,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:16:24,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 601 [2023-11-06 22:16:24,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 381 transitions, 7318 flow. Second operand has 18 states, 18 states have (on average 233.0) internal successors, (4194), 18 states have internal predecessors, (4194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:24,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:24,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 601 [2023-11-06 22:16:24,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:24,988 INFO L124 PetriNetUnfolderBase]: 837/1748 cut-off events. [2023-11-06 22:16:24,988 INFO L125 PetriNetUnfolderBase]: For 24110/24110 co-relation queries the response was YES. [2023-11-06 22:16:25,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14050 conditions, 1748 events. 837/1748 cut-off events. For 24110/24110 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 11482 event pairs, 67 based on Foata normal form. 2/1748 useless extension candidates. Maximal degree in co-relation 13963. Up to 545 conditions per place. [2023-11-06 22:16:25,009 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 232 selfloop transitions, 167 changer transitions 5/404 dead transitions. [2023-11-06 22:16:25,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 404 transitions, 8247 flow [2023-11-06 22:16:25,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:16:25,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:16:25,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2360 transitions. [2023-11-06 22:16:25,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39267886855241263 [2023-11-06 22:16:25,012 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2360 transitions. [2023-11-06 22:16:25,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2360 transitions. [2023-11-06 22:16:25,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:25,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2360 transitions. [2023-11-06 22:16:25,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 236.0) internal successors, (2360), 10 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:25,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 601.0) internal successors, (6611), 11 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:25,018 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 601.0) internal successors, (6611), 11 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:25,019 INFO L175 Difference]: Start difference. First operand has 302 places, 381 transitions, 7318 flow. Second operand 10 states and 2360 transitions. [2023-11-06 22:16:25,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 404 transitions, 8247 flow [2023-11-06 22:16:25,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 404 transitions, 8018 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:16:25,214 INFO L231 Difference]: Finished difference. Result has 301 places, 376 transitions, 7299 flow [2023-11-06 22:16:25,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=7044, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7299, PETRI_PLACES=301, PETRI_TRANSITIONS=376} [2023-11-06 22:16:25,215 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 280 predicate places. [2023-11-06 22:16:25,215 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 376 transitions, 7299 flow [2023-11-06 22:16:25,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 233.0) internal successors, (4194), 18 states have internal predecessors, (4194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:25,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:25,216 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:25,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:25,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:25,422 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:16:25,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:25,423 INFO L85 PathProgramCache]: Analyzing trace with hash 655623229, now seen corresponding path program 32 times [2023-11-06 22:16:25,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:25,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003792967] [2023-11-06 22:16:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:25,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:25,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:25,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003792967] [2023-11-06 22:16:25,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003792967] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:25,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255926803] [2023-11-06 22:16:25,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:16:25,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:25,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:25,880 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:25,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-06 22:16:26,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:16:26,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:16:26,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:16:26,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:26,277 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 17 treesize of output 9 [2023-11-06 22:16:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:26,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:26,520 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:16:26,520 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 40 treesize of output 19 [2023-11-06 22:16:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:26,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255926803] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:26,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:16:26,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-06 22:16:26,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984985041] [2023-11-06 22:16:26,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:26,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:16:26,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:26,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:16:26,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:16:27,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 601 [2023-11-06 22:16:27,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 376 transitions, 7299 flow. Second operand has 18 states, 18 states have (on average 230.05555555555554) internal successors, (4141), 18 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:27,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:27,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 601 [2023-11-06 22:16:27,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:28,696 INFO L124 PetriNetUnfolderBase]: 854/1775 cut-off events. [2023-11-06 22:16:28,696 INFO L125 PetriNetUnfolderBase]: For 25257/25257 co-relation queries the response was YES. [2023-11-06 22:16:28,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14595 conditions, 1775 events. 854/1775 cut-off events. For 25257/25257 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 11658 event pairs, 30 based on Foata normal form. 12/1787 useless extension candidates. Maximal degree in co-relation 14508. Up to 922 conditions per place. [2023-11-06 22:16:28,717 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 274 selfloop transitions, 145 changer transitions 1/420 dead transitions. [2023-11-06 22:16:28,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 420 transitions, 8702 flow [2023-11-06 22:16:28,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:16:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:16:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2565 transitions. [2023-11-06 22:16:28,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879897141128422 [2023-11-06 22:16:28,721 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2565 transitions. [2023-11-06 22:16:28,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2565 transitions. [2023-11-06 22:16:28,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:28,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2565 transitions. [2023-11-06 22:16:28,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 233.1818181818182) internal successors, (2565), 11 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:28,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 601.0) internal successors, (7212), 12 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:28,730 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 601.0) internal successors, (7212), 12 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:28,730 INFO L175 Difference]: Start difference. First operand has 301 places, 376 transitions, 7299 flow. Second operand 11 states and 2565 transitions. [2023-11-06 22:16:28,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 420 transitions, 8702 flow [2023-11-06 22:16:28,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 420 transitions, 8409 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-06 22:16:28,958 INFO L231 Difference]: Finished difference. Result has 306 places, 385 transitions, 7549 flow [2023-11-06 22:16:28,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=7010, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7549, PETRI_PLACES=306, PETRI_TRANSITIONS=385} [2023-11-06 22:16:28,959 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 285 predicate places. [2023-11-06 22:16:28,959 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 385 transitions, 7549 flow [2023-11-06 22:16:28,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 230.05555555555554) internal successors, (4141), 18 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:28,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:28,960 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:28,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:29,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:29,160 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:16:29,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:29,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1724586540, now seen corresponding path program 33 times [2023-11-06 22:16:29,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:29,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366234410] [2023-11-06 22:16:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:29,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:29,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:29,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366234410] [2023-11-06 22:16:29,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366234410] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:29,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33439635] [2023-11-06 22:16:29,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:16:29,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:29,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:29,514 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:29,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-06 22:16:29,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:16:29,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:16:29,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:16:29,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:29,959 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 82 treesize of output 50 [2023-11-06 22:16:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:29,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:30,182 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:16:30,183 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 109 treesize of output 56 [2023-11-06 22:16:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:30,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33439635] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:30,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:16:30,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-06 22:16:30,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745006629] [2023-11-06 22:16:30,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:30,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:16:30,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:30,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:16:30,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:16:31,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 601 [2023-11-06 22:16:31,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 385 transitions, 7549 flow. Second operand has 17 states, 17 states have (on average 233.11764705882354) internal successors, (3963), 17 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:31,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:31,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 601 [2023-11-06 22:16:31,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:32,100 INFO L124 PetriNetUnfolderBase]: 850/1763 cut-off events. [2023-11-06 22:16:32,100 INFO L125 PetriNetUnfolderBase]: For 24359/24359 co-relation queries the response was YES. [2023-11-06 22:16:32,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14639 conditions, 1763 events. 850/1763 cut-off events. For 24359/24359 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11540 event pairs, 180 based on Foata normal form. 2/1765 useless extension candidates. Maximal degree in co-relation 14550. Up to 1048 conditions per place. [2023-11-06 22:16:32,116 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 275 selfloop transitions, 122 changer transitions 4/401 dead transitions. [2023-11-06 22:16:32,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 401 transitions, 8429 flow [2023-11-06 22:16:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:16:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:16:32,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2121 transitions. [2023-11-06 22:16:32,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39212423738214086 [2023-11-06 22:16:32,119 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2121 transitions. [2023-11-06 22:16:32,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2121 transitions. [2023-11-06 22:16:32,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:32,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2121 transitions. [2023-11-06 22:16:32,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 235.66666666666666) internal successors, (2121), 9 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:32,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 601.0) internal successors, (6010), 10 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:32,123 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 601.0) internal successors, (6010), 10 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:32,123 INFO L175 Difference]: Start difference. First operand has 306 places, 385 transitions, 7549 flow. Second operand 9 states and 2121 transitions. [2023-11-06 22:16:32,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 401 transitions, 8429 flow [2023-11-06 22:16:32,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 401 transitions, 8154 flow, removed 17 selfloop flow, removed 8 redundant places. [2023-11-06 22:16:32,328 INFO L231 Difference]: Finished difference. Result has 304 places, 381 transitions, 7441 flow [2023-11-06 22:16:32,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=7230, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7441, PETRI_PLACES=304, PETRI_TRANSITIONS=381} [2023-11-06 22:16:32,329 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 283 predicate places. [2023-11-06 22:16:32,330 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 381 transitions, 7441 flow [2023-11-06 22:16:32,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 233.11764705882354) internal successors, (3963), 17 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:32,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:32,330 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:32,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:32,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-06 22:16:32,537 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:16:32,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:32,537 INFO L85 PathProgramCache]: Analyzing trace with hash -236551477, now seen corresponding path program 34 times [2023-11-06 22:16:32,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:32,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293059445] [2023-11-06 22:16:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:32,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:32,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:32,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293059445] [2023-11-06 22:16:32,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293059445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:32,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025814887] [2023-11-06 22:16:32,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:16:32,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:32,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:32,988 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:32,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-06 22:16:33,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:16:33,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:16:33,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:16:33,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:33,392 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 112 treesize of output 72 [2023-11-06 22:16:33,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:33,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:33,834 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:16:33,834 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 44 treesize of output 28 [2023-11-06 22:16:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:33,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025814887] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:33,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:16:33,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2023-11-06 22:16:33,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878965744] [2023-11-06 22:16:33,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:33,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:16:33,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:33,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:16:33,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:16:35,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 601 [2023-11-06 22:16:35,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 381 transitions, 7441 flow. Second operand has 20 states, 20 states have (on average 229.9) internal successors, (4598), 20 states have internal predecessors, (4598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:35,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:35,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 601 [2023-11-06 22:16:35,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:37,799 INFO L124 PetriNetUnfolderBase]: 903/1880 cut-off events. [2023-11-06 22:16:37,799 INFO L125 PetriNetUnfolderBase]: For 26441/26441 co-relation queries the response was YES. [2023-11-06 22:16:37,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15579 conditions, 1880 events. 903/1880 cut-off events. For 26441/26441 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 12570 event pairs, 14 based on Foata normal form. 14/1894 useless extension candidates. Maximal degree in co-relation 15490. Up to 450 conditions per place. [2023-11-06 22:16:37,820 INFO L140 encePairwiseOnDemand]: 593/601 looper letters, 233 selfloop transitions, 273 changer transitions 1/507 dead transitions. [2023-11-06 22:16:37,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 507 transitions, 9691 flow [2023-11-06 22:16:37,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:16:37,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 22:16:37,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 7920 transitions. [2023-11-06 22:16:37,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38758931193109525 [2023-11-06 22:16:37,827 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 7920 transitions. [2023-11-06 22:16:37,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 7920 transitions. [2023-11-06 22:16:37,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:37,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 7920 transitions. [2023-11-06 22:16:37,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 232.94117647058823) internal successors, (7920), 34 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:37,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 601.0) internal successors, (21035), 35 states have internal predecessors, (21035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:37,844 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 601.0) internal successors, (21035), 35 states have internal predecessors, (21035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:37,844 INFO L175 Difference]: Start difference. First operand has 304 places, 381 transitions, 7441 flow. Second operand 34 states and 7920 transitions. [2023-11-06 22:16:37,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 507 transitions, 9691 flow [2023-11-06 22:16:38,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 507 transitions, 9441 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-11-06 22:16:38,119 INFO L231 Difference]: Finished difference. Result has 336 places, 416 transitions, 8751 flow [2023-11-06 22:16:38,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=7168, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8751, PETRI_PLACES=336, PETRI_TRANSITIONS=416} [2023-11-06 22:16:38,120 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 315 predicate places. [2023-11-06 22:16:38,120 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 416 transitions, 8751 flow [2023-11-06 22:16:38,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 229.9) internal successors, (4598), 20 states have internal predecessors, (4598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:38,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:38,121 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:38,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:38,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:38,322 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:16:38,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:38,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1609293497, now seen corresponding path program 35 times [2023-11-06 22:16:38,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:38,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705396709] [2023-11-06 22:16:38,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:38,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:38,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:38,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705396709] [2023-11-06 22:16:38,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705396709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:38,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823293165] [2023-11-06 22:16:38,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:16:38,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:38,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:38,711 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:38,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-06 22:16:38,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:16:38,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:16:38,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:16:38,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:39,106 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 17 treesize of output 9 [2023-11-06 22:16:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:39,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:39,332 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:16:39,333 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 40 treesize of output 19 [2023-11-06 22:16:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:39,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823293165] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:39,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:16:39,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-06 22:16:39,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240149061] [2023-11-06 22:16:39,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:39,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:16:39,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:39,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:16:39,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:16:40,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 601 [2023-11-06 22:16:40,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 416 transitions, 8751 flow. Second operand has 17 states, 17 states have (on average 230.23529411764707) internal successors, (3914), 17 states have internal predecessors, (3914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:40,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:40,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 601 [2023-11-06 22:16:40,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:41,530 INFO L124 PetriNetUnfolderBase]: 893/1820 cut-off events. [2023-11-06 22:16:41,530 INFO L125 PetriNetUnfolderBase]: For 29450/29450 co-relation queries the response was YES. [2023-11-06 22:16:41,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16134 conditions, 1820 events. 893/1820 cut-off events. For 29450/29450 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 11877 event pairs, 16 based on Foata normal form. 16/1836 useless extension candidates. Maximal degree in co-relation 16036. Up to 485 conditions per place. [2023-11-06 22:16:41,550 INFO L140 encePairwiseOnDemand]: 593/601 looper letters, 244 selfloop transitions, 209 changer transitions 1/454 dead transitions. [2023-11-06 22:16:41,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 454 transitions, 10037 flow [2023-11-06 22:16:41,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:16:41,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:16:41,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3260 transitions. [2023-11-06 22:16:41,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874494889469931 [2023-11-06 22:16:41,554 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3260 transitions. [2023-11-06 22:16:41,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3260 transitions. [2023-11-06 22:16:41,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:41,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3260 transitions. [2023-11-06 22:16:41,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 232.85714285714286) internal successors, (3260), 14 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:41,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 601.0) internal successors, (9015), 15 states have internal predecessors, (9015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:41,562 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 601.0) internal successors, (9015), 15 states have internal predecessors, (9015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:41,562 INFO L175 Difference]: Start difference. First operand has 336 places, 416 transitions, 8751 flow. Second operand 14 states and 3260 transitions. [2023-11-06 22:16:41,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 454 transitions, 10037 flow [2023-11-06 22:16:41,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 454 transitions, 9426 flow, removed 106 selfloop flow, removed 23 redundant places. [2023-11-06 22:16:41,846 INFO L231 Difference]: Finished difference. Result has 323 places, 415 transitions, 8653 flow [2023-11-06 22:16:41,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=7884, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8653, PETRI_PLACES=323, PETRI_TRANSITIONS=415} [2023-11-06 22:16:41,847 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 302 predicate places. [2023-11-06 22:16:41,847 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 415 transitions, 8653 flow [2023-11-06 22:16:41,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 230.23529411764707) internal successors, (3914), 17 states have internal predecessors, (3914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:41,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:41,848 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:41,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:42,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:42,048 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:16:42,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:42,049 INFO L85 PathProgramCache]: Analyzing trace with hash -433618704, now seen corresponding path program 36 times [2023-11-06 22:16:42,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:42,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955710051] [2023-11-06 22:16:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:42,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:42,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:42,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955710051] [2023-11-06 22:16:42,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955710051] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:42,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461977883] [2023-11-06 22:16:42,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:16:42,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:42,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:42,469 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:42,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-06 22:16:42,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:16:42,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:16:42,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:16:42,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:42,924 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 17 treesize of output 9 [2023-11-06 22:16:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:42,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:43,151 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:16:43,152 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 62 treesize of output 38 [2023-11-06 22:16:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:43,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461977883] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:43,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:16:43,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-06 22:16:43,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841132214] [2023-11-06 22:16:43,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:43,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:16:43,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:43,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:16:43,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:16:44,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 601 [2023-11-06 22:16:44,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 415 transitions, 8653 flow. Second operand has 18 states, 18 states have (on average 230.0) internal successors, (4140), 18 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:44,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:44,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 601 [2023-11-06 22:16:44,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:45,221 INFO L124 PetriNetUnfolderBase]: 893/1818 cut-off events. [2023-11-06 22:16:45,221 INFO L125 PetriNetUnfolderBase]: For 30950/30950 co-relation queries the response was YES. [2023-11-06 22:16:45,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15962 conditions, 1818 events. 893/1818 cut-off events. For 30950/30950 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 11795 event pairs, 154 based on Foata normal form. 12/1830 useless extension candidates. Maximal degree in co-relation 15870. Up to 958 conditions per place. [2023-11-06 22:16:45,241 INFO L140 encePairwiseOnDemand]: 594/601 looper letters, 290 selfloop transitions, 147 changer transitions 0/437 dead transitions. [2023-11-06 22:16:45,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 437 transitions, 9616 flow [2023-11-06 22:16:45,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:16:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:16:45,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2564 transitions. [2023-11-06 22:16:45,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38783845106640447 [2023-11-06 22:16:45,244 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2564 transitions. [2023-11-06 22:16:45,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2564 transitions. [2023-11-06 22:16:45,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:45,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2564 transitions. [2023-11-06 22:16:45,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 233.0909090909091) internal successors, (2564), 11 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:45,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 601.0) internal successors, (7212), 12 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:45,249 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 601.0) internal successors, (7212), 12 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:45,250 INFO L175 Difference]: Start difference. First operand has 323 places, 415 transitions, 8653 flow. Second operand 11 states and 2564 transitions. [2023-11-06 22:16:45,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 437 transitions, 9616 flow [2023-11-06 22:16:45,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 437 transitions, 9371 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-11-06 22:16:45,486 INFO L231 Difference]: Finished difference. Result has 326 places, 413 transitions, 8681 flow [2023-11-06 22:16:45,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=8300, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8681, PETRI_PLACES=326, PETRI_TRANSITIONS=413} [2023-11-06 22:16:45,487 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 305 predicate places. [2023-11-06 22:16:45,487 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 413 transitions, 8681 flow [2023-11-06 22:16:45,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 230.0) internal successors, (4140), 18 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:45,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:45,488 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:45,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-06 22:16:45,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:45,688 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:16:45,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:45,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1044972120, now seen corresponding path program 37 times [2023-11-06 22:16:45,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:45,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993195201] [2023-11-06 22:16:45,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:45,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:16:46,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:46,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993195201] [2023-11-06 22:16:46,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993195201] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:46,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595850890] [2023-11-06 22:16:46,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:16:46,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:46,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:46,012 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:46,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5557eeca-e619-40ae-a490-84245df32b4e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process