./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 c9008ebcceff34245d74f1892a84a552f8268a9318e8a2970f14b3ec6b594daf --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:55:11,303 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:55:11,417 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:55:11,426 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:55:11,427 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:55:11,463 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:55:11,467 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:55:11,468 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:55:11,469 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:55:11,474 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:55:11,475 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:55:11,476 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:55:11,476 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:55:11,478 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:55:11,479 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:55:11,479 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:55:11,480 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:55:11,480 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:55:11,481 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:55:11,481 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:55:11,482 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:55:11,483 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:55:11,483 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:55:11,485 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:55:11,485 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:55:11,486 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:55:11,487 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:55:11,487 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:55:11,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:11,488 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:55:11,490 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:55:11,490 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:55:11,490 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:55:11,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:55:11,491 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:55:11,491 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:55:11,492 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:55:11,492 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:55:11,492 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:55:11,492 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_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9008ebcceff34245d74f1892a84a552f8268a9318e8a2970f14b3ec6b594daf [2023-11-19 07:55:11,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:55:11,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:55:11,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:55:11,861 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:55:11,862 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:55:11,863 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2023-11-19 07:55:15,032 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:55:15,284 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:55:15,285 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2023-11-19 07:55:15,296 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu/data/ca2952eb9/84e9359aacbe40fcacdc5f7096940a7c/FLAGfe3aea628 [2023-11-19 07:55:15,310 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu/data/ca2952eb9/84e9359aacbe40fcacdc5f7096940a7c [2023-11-19 07:55:15,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:55:15,315 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:55:15,316 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:15,316 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:55:15,329 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:55:15,330 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,332 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5875d1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15, skipping insertion in model container [2023-11-19 07:55:15,335 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,364 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:55:15,591 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_25521c10-496a-4984-8008-10f800040bb7/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3984,3997] [2023-11-19 07:55:15,626 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:15,644 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:55:15,678 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_25521c10-496a-4984-8008-10f800040bb7/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3984,3997] [2023-11-19 07:55:15,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:15,702 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:55:15,702 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15 WrapperNode [2023-11-19 07:55:15,702 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:15,704 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:15,704 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:55:15,704 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:55:15,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,725 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,776 INFO L138 Inliner]: procedures = 27, calls = 66, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 439 [2023-11-19 07:55:15,777 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:15,777 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:55:15,778 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:55:15,778 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:55:15,788 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,795 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,796 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,813 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,819 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,823 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,826 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,833 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:55:15,834 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:55:15,834 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:55:15,834 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:55:15,835 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (1/1) ... [2023-11-19 07:55:15,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:15,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:15,899 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:15,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:55:15,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:55:15,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:55:15,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:55:15,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:55:15,951 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:55:15,951 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:55:15,951 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:55:15,953 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:55:15,953 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:55:15,953 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:55:15,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:55:15,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:55:15,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:55:15,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:55:15,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:55:15,959 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:55:16,176 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:55:16,179 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:55:17,086 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:55:17,110 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:55:17,110 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 07:55:17,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:17 BoogieIcfgContainer [2023-11-19 07:55:17,123 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:55:17,131 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:55:17,131 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:55:17,135 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:55:17,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:55:15" (1/3) ... [2023-11-19 07:55:17,136 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f6496d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:17, skipping insertion in model container [2023-11-19 07:55:17,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:15" (2/3) ... [2023-11-19 07:55:17,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f6496d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:17, skipping insertion in model container [2023-11-19 07:55:17,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:17" (3/3) ... [2023-11-19 07:55:17,138 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-trans.wvr.c [2023-11-19 07:55:17,148 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:55:17,159 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:55:17,159 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:55:17,160 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:55:17,276 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:55:17,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 536 places, 567 transitions, 1155 flow [2023-11-19 07:55:17,664 INFO L124 PetriNetUnfolderBase]: 41/564 cut-off events. [2023-11-19 07:55:17,664 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:55:17,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 564 events. 41/564 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 703 event pairs, 0 based on Foata normal form. 0/522 useless extension candidates. Maximal degree in co-relation 481. Up to 2 conditions per place. [2023-11-19 07:55:17,673 INFO L82 GeneralOperation]: Start removeDead. Operand has 536 places, 567 transitions, 1155 flow [2023-11-19 07:55:17,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 522 places, 553 transitions, 1124 flow [2023-11-19 07:55:17,687 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:55:17,697 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 522 places, 553 transitions, 1124 flow [2023-11-19 07:55:17,699 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 522 places, 553 transitions, 1124 flow [2023-11-19 07:55:17,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 522 places, 553 transitions, 1124 flow [2023-11-19 07:55:17,884 INFO L124 PetriNetUnfolderBase]: 41/553 cut-off events. [2023-11-19 07:55:17,884 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:55:17,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 553 events. 41/553 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 703 event pairs, 0 based on Foata normal form. 0/512 useless extension candidates. Maximal degree in co-relation 481. Up to 2 conditions per place. [2023-11-19 07:55:17,905 INFO L119 LiptonReduction]: Number of co-enabled transitions 22110 [2023-11-19 07:55:40,960 INFO L134 LiptonReduction]: Checked pairs total: 25175 [2023-11-19 07:55:40,960 INFO L136 LiptonReduction]: Total number of compositions: 645 [2023-11-19 07:55:40,976 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:40,983 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=LoopHeads, 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;@3e78e9df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:40,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:55:40,994 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:55:40,995 INFO L124 PetriNetUnfolderBase]: 10/41 cut-off events. [2023-11-19 07:55:40,995 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:55:40,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:40,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:40,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:41,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:41,002 INFO L85 PathProgramCache]: Analyzing trace with hash -520324327, now seen corresponding path program 1 times [2023-11-19 07:55:41,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:41,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077867327] [2023-11-19 07:55:41,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:41,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:41,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:41,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077867327] [2023-11-19 07:55:41,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077867327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:41,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:41,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:55:41,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674438237] [2023-11-19 07:55:41,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:41,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:55:41,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:41,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:55:41,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:55:41,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 531 out of 1212 [2023-11-19 07:55:41,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 102 flow. Second operand has 2 states, 2 states have (on average 543.5) internal successors, (1087), 2 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:41,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:41,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 531 of 1212 [2023-11-19 07:55:41,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:41,746 INFO L124 PetriNetUnfolderBase]: 699/1048 cut-off events. [2023-11-19 07:55:41,746 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-11-19 07:55:41,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2232 conditions, 1048 events. 699/1048 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3721 event pairs, 557 based on Foata normal form. 0/906 useless extension candidates. Maximal degree in co-relation 2016. Up to 1049 conditions per place. [2023-11-19 07:55:41,756 INFO L140 encePairwiseOnDemand]: 1211/1212 looper letters, 41 selfloop transitions, 0 changer transitions 0/41 dead transitions. [2023-11-19 07:55:41,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 182 flow [2023-11-19 07:55:41,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:55:41,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:55:41,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1104 transitions. [2023-11-19 07:55:41,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45544554455445546 [2023-11-19 07:55:41,779 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1104 transitions. [2023-11-19 07:55:41,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1104 transitions. [2023-11-19 07:55:41,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:41,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1104 transitions. [2023-11-19 07:55:41,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 552.0) internal successors, (1104), 2 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:41,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1212.0) internal successors, (3636), 3 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:41,810 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1212.0) internal successors, (3636), 3 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:41,813 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 102 flow. Second operand 2 states and 1104 transitions. [2023-11-19 07:55:41,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 182 flow [2023-11-19 07:55:41,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 41 transitions, 170 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:55:41,851 INFO L231 Difference]: Finished difference. Result has 37 places, 41 transitions, 88 flow [2023-11-19 07:55:41,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=88, PETRI_PLACES=37, PETRI_TRANSITIONS=41} [2023-11-19 07:55:41,858 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-11-19 07:55:41,858 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 41 transitions, 88 flow [2023-11-19 07:55:41,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 543.5) internal successors, (1087), 2 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:41,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:41,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:41,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:55:41,861 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:41,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:41,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1236281337, now seen corresponding path program 1 times [2023-11-19 07:55:41,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:41,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28421809] [2023-11-19 07:55:41,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:41,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:42,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:42,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28421809] [2023-11-19 07:55:42,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28421809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:42,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:42,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:55:42,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91254145] [2023-11-19 07:55:42,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:42,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:42,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:42,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:42,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:42,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 524 out of 1212 [2023-11-19 07:55:42,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 41 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 533.3333333333334) internal successors, (1600), 3 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:42,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:42,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 524 of 1212 [2023-11-19 07:55:42,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:42,451 INFO L124 PetriNetUnfolderBase]: 789/1184 cut-off events. [2023-11-19 07:55:42,452 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-19 07:55:42,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2435 conditions, 1184 events. 789/1184 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4442 event pairs, 473 based on Foata normal form. 0/1036 useless extension candidates. Maximal degree in co-relation 2432. Up to 867 conditions per place. [2023-11-19 07:55:42,460 INFO L140 encePairwiseOnDemand]: 1208/1212 looper letters, 52 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-11-19 07:55:42,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 228 flow [2023-11-19 07:55:42,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:42,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:42,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1628 transitions. [2023-11-19 07:55:42,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44774477447744776 [2023-11-19 07:55:42,468 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1628 transitions. [2023-11-19 07:55:42,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1628 transitions. [2023-11-19 07:55:42,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:42,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1628 transitions. [2023-11-19 07:55:42,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 542.6666666666666) internal successors, (1628), 3 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:42,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1212.0) internal successors, (4848), 4 states have internal predecessors, (4848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:42,493 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1212.0) internal successors, (4848), 4 states have internal predecessors, (4848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:42,494 INFO L175 Difference]: Start difference. First operand has 37 places, 41 transitions, 88 flow. Second operand 3 states and 1628 transitions. [2023-11-19 07:55:42,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 228 flow [2023-11-19 07:55:42,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:55:42,497 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 106 flow [2023-11-19 07:55:42,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2023-11-19 07:55:42,500 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-11-19 07:55:42,500 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 106 flow [2023-11-19 07:55:42,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 533.3333333333334) internal successors, (1600), 3 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:42,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:42,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:42,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:55:42,510 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:42,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:42,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1990745682, now seen corresponding path program 1 times [2023-11-19 07:55:42,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:42,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231388081] [2023-11-19 07:55:42,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:42,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:42,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:42,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231388081] [2023-11-19 07:55:42,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231388081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:42,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:42,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:55:42,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135685012] [2023-11-19 07:55:42,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:42,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:42,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:42,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:42,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:42,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 511 out of 1212 [2023-11-19 07:55:42,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 520.6666666666666) internal successors, (1562), 3 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:42,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:42,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 511 of 1212 [2023-11-19 07:55:42,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:43,274 INFO L124 PetriNetUnfolderBase]: 789/1185 cut-off events. [2023-11-19 07:55:43,274 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2023-11-19 07:55:43,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2807 conditions, 1185 events. 789/1185 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4315 event pairs, 641 based on Foata normal form. 0/1129 useless extension candidates. Maximal degree in co-relation 2802. Up to 1185 conditions per place. [2023-11-19 07:55:43,283 INFO L140 encePairwiseOnDemand]: 1209/1212 looper letters, 41 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-11-19 07:55:43,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 43 transitions, 194 flow [2023-11-19 07:55:43,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:43,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1576 transitions. [2023-11-19 07:55:43,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43344334433443343 [2023-11-19 07:55:43,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1576 transitions. [2023-11-19 07:55:43,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1576 transitions. [2023-11-19 07:55:43,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:43,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1576 transitions. [2023-11-19 07:55:43,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 525.3333333333334) internal successors, (1576), 3 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:43,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1212.0) internal successors, (4848), 4 states have internal predecessors, (4848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:43,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1212.0) internal successors, (4848), 4 states have internal predecessors, (4848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:43,313 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 106 flow. Second operand 3 states and 1576 transitions. [2023-11-19 07:55:43,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 43 transitions, 194 flow [2023-11-19 07:55:43,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:55:43,322 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 112 flow [2023-11-19 07:55:43,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=43} [2023-11-19 07:55:43,324 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2023-11-19 07:55:43,328 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 112 flow [2023-11-19 07:55:43,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 520.6666666666666) internal successors, (1562), 3 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:43,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:43,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:43,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:55:43,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:43,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:43,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1432284726, now seen corresponding path program 1 times [2023-11-19 07:55:43,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:43,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448492545] [2023-11-19 07:55:43,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:43,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:55:43,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:43,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448492545] [2023-11-19 07:55:43,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448492545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:43,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:43,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:55:43,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769832332] [2023-11-19 07:55:43,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:43,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:55:43,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:43,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:55:43,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:55:43,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 511 out of 1212 [2023-11-19 07:55:43,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 518.5) internal successors, (2074), 4 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:43,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:43,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 511 of 1212 [2023-11-19 07:55:43,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:43,989 INFO L124 PetriNetUnfolderBase]: 789/1186 cut-off events. [2023-11-19 07:55:43,990 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-11-19 07:55:43,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2677 conditions, 1186 events. 789/1186 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4315 event pairs, 641 based on Foata normal form. 0/1084 useless extension candidates. Maximal degree in co-relation 2671. Up to 1184 conditions per place. [2023-11-19 07:55:44,030 INFO L140 encePairwiseOnDemand]: 1207/1212 looper letters, 40 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2023-11-19 07:55:44,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 202 flow [2023-11-19 07:55:44,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:55:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:55:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2088 transitions. [2023-11-19 07:55:44,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306930693069307 [2023-11-19 07:55:44,039 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2088 transitions. [2023-11-19 07:55:44,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2088 transitions. [2023-11-19 07:55:44,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:44,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2088 transitions. [2023-11-19 07:55:44,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:44,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:44,064 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:44,064 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 112 flow. Second operand 4 states and 2088 transitions. [2023-11-19 07:55:44,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 202 flow [2023-11-19 07:55:44,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 198 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:55:44,067 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 126 flow [2023-11-19 07:55:44,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2023-11-19 07:55:44,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-11-19 07:55:44,069 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 126 flow [2023-11-19 07:55:44,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 518.5) internal successors, (2074), 4 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:44,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:44,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:44,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:55:44,071 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:44,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:44,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1053063921, now seen corresponding path program 1 times [2023-11-19 07:55:44,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:44,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925955646] [2023-11-19 07:55:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:44,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:55:44,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:44,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925955646] [2023-11-19 07:55:44,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925955646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:44,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:44,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:55:44,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094205609] [2023-11-19 07:55:44,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:44,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:55:44,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:44,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:55:44,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:55:44,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 511 out of 1212 [2023-11-19 07:55:44,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 518.75) internal successors, (2075), 4 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:44,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:44,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 511 of 1212 [2023-11-19 07:55:44,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:44,714 INFO L124 PetriNetUnfolderBase]: 789/1187 cut-off events. [2023-11-19 07:55:44,715 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-11-19 07:55:44,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2686 conditions, 1187 events. 789/1187 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4315 event pairs, 641 based on Foata normal form. 0/1086 useless extension candidates. Maximal degree in co-relation 2679. Up to 1186 conditions per place. [2023-11-19 07:55:44,723 INFO L140 encePairwiseOnDemand]: 1208/1212 looper letters, 42 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2023-11-19 07:55:44,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 218 flow [2023-11-19 07:55:44,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:55:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:55:44,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2087 transitions. [2023-11-19 07:55:44,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430486798679868 [2023-11-19 07:55:44,732 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2087 transitions. [2023-11-19 07:55:44,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2087 transitions. [2023-11-19 07:55:44,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:44,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2087 transitions. [2023-11-19 07:55:44,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 521.75) internal successors, (2087), 4 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:44,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:44,755 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:44,755 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 126 flow. Second operand 4 states and 2087 transitions. [2023-11-19 07:55:44,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 218 flow [2023-11-19 07:55:44,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:55:44,758 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 139 flow [2023-11-19 07:55:44,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-19 07:55:44,760 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2023-11-19 07:55:44,760 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 139 flow [2023-11-19 07:55:44,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 518.75) internal successors, (2075), 4 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:44,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:44,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:44,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:55:44,762 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:44,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:44,762 INFO L85 PathProgramCache]: Analyzing trace with hash -643470102, now seen corresponding path program 1 times [2023-11-19 07:55:44,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:44,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576957508] [2023-11-19 07:55:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:44,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:55:44,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:44,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576957508] [2023-11-19 07:55:44,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576957508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:44,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:44,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:55:44,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299737395] [2023-11-19 07:55:44,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:44,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:55:44,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:44,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:55:44,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:55:45,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 511 out of 1212 [2023-11-19 07:55:45,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:45,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:45,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 511 of 1212 [2023-11-19 07:55:45,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:45,309 INFO L124 PetriNetUnfolderBase]: 789/1188 cut-off events. [2023-11-19 07:55:45,310 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2023-11-19 07:55:45,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2695 conditions, 1188 events. 789/1188 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4315 event pairs, 641 based on Foata normal form. 0/1088 useless extension candidates. Maximal degree in co-relation 2687. Up to 1187 conditions per place. [2023-11-19 07:55:45,319 INFO L140 encePairwiseOnDemand]: 1208/1212 looper letters, 43 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-11-19 07:55:45,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 233 flow [2023-11-19 07:55:45,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:55:45,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:55:45,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2087 transitions. [2023-11-19 07:55:45,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430486798679868 [2023-11-19 07:55:45,327 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2087 transitions. [2023-11-19 07:55:45,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2087 transitions. [2023-11-19 07:55:45,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:45,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2087 transitions. [2023-11-19 07:55:45,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 521.75) internal successors, (2087), 4 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:45,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:45,348 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:45,348 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 139 flow. Second operand 4 states and 2087 transitions. [2023-11-19 07:55:45,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 233 flow [2023-11-19 07:55:45,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 227 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 07:55:45,351 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 147 flow [2023-11-19 07:55:45,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-19 07:55:45,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2023-11-19 07:55:45,352 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 147 flow [2023-11-19 07:55:45,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:45,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:45,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:45,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:55:45,355 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:45,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:45,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1440074201, now seen corresponding path program 1 times [2023-11-19 07:55:45,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:45,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005675071] [2023-11-19 07:55:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:45,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:55:45,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:45,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005675071] [2023-11-19 07:55:45,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005675071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:45,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:45,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:55:45,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940906858] [2023-11-19 07:55:45,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:45,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:55:45,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:45,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:55:45,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:55:45,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 511 out of 1212 [2023-11-19 07:55:45,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 519.25) internal successors, (2077), 4 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:45,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:45,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 511 of 1212 [2023-11-19 07:55:45,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:45,976 INFO L124 PetriNetUnfolderBase]: 789/1189 cut-off events. [2023-11-19 07:55:45,976 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-11-19 07:55:45,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2701 conditions, 1189 events. 789/1189 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4320 event pairs, 641 based on Foata normal form. 0/1090 useless extension candidates. Maximal degree in co-relation 2692. Up to 1188 conditions per place. [2023-11-19 07:55:45,987 INFO L140 encePairwiseOnDemand]: 1208/1212 looper letters, 44 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2023-11-19 07:55:45,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 243 flow [2023-11-19 07:55:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:55:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:55:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2087 transitions. [2023-11-19 07:55:45,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430486798679868 [2023-11-19 07:55:45,996 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2087 transitions. [2023-11-19 07:55:45,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2087 transitions. [2023-11-19 07:55:45,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:45,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2087 transitions. [2023-11-19 07:55:46,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 521.75) internal successors, (2087), 4 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:46,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:46,015 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:46,015 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 147 flow. Second operand 4 states and 2087 transitions. [2023-11-19 07:55:46,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 243 flow [2023-11-19 07:55:46,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 237 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 07:55:46,022 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 155 flow [2023-11-19 07:55:46,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-11-19 07:55:46,024 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2023-11-19 07:55:46,024 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 155 flow [2023-11-19 07:55:46,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 519.25) internal successors, (2077), 4 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:46,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:46,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:46,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:55:46,026 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:46,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:46,027 INFO L85 PathProgramCache]: Analyzing trace with hash 405858536, now seen corresponding path program 1 times [2023-11-19 07:55:46,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:46,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951715559] [2023-11-19 07:55:46,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:46,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:55:46,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:46,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951715559] [2023-11-19 07:55:46,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951715559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:46,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936805466] [2023-11-19 07:55:46,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:46,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:46,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:46,420 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:46,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:55:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:46,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:55:46,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:55:46,740 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:55:46,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936805466] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:46,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:55:46,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 07:55:46,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14839474] [2023-11-19 07:55:46,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:46,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:55:46,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:46,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:55:46,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:55:46,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 511 out of 1212 [2023-11-19 07:55:46,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 155 flow. Second operand has 4 states, 4 states have (on average 519.5) internal successors, (2078), 4 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:46,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:46,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 511 of 1212 [2023-11-19 07:55:46,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:47,235 INFO L124 PetriNetUnfolderBase]: 789/1190 cut-off events. [2023-11-19 07:55:47,235 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2023-11-19 07:55:47,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2707 conditions, 1190 events. 789/1190 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4320 event pairs, 641 based on Foata normal form. 0/1092 useless extension candidates. Maximal degree in co-relation 2697. Up to 1189 conditions per place. [2023-11-19 07:55:47,246 INFO L140 encePairwiseOnDemand]: 1208/1212 looper letters, 45 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-11-19 07:55:47,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 253 flow [2023-11-19 07:55:47,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:55:47,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:55:47,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2087 transitions. [2023-11-19 07:55:47,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430486798679868 [2023-11-19 07:55:47,256 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2087 transitions. [2023-11-19 07:55:47,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2087 transitions. [2023-11-19 07:55:47,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:47,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2087 transitions. [2023-11-19 07:55:47,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 521.75) internal successors, (2087), 4 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:47,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:47,278 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:47,278 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 155 flow. Second operand 4 states and 2087 transitions. [2023-11-19 07:55:47,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 253 flow [2023-11-19 07:55:47,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 247 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 07:55:47,283 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 163 flow [2023-11-19 07:55:47,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-11-19 07:55:47,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2023-11-19 07:55:47,287 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 163 flow [2023-11-19 07:55:47,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 519.5) internal successors, (2078), 4 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:47,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:47,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:47,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:47,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25521c10-496a-4984-8008-10f800040bb7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:47,504 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:47,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:47,505 INFO L85 PathProgramCache]: Analyzing trace with hash -345881631, now seen corresponding path program 1 times [2023-11-19 07:55:47,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:47,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97383989] [2023-11-19 07:55:47,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:47,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:55:48,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:48,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97383989] [2023-11-19 07:55:48,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97383989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:48,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:48,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-19 07:55:48,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112559920] [2023-11-19 07:55:48,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:48,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:55:48,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:48,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:55:48,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:55:50,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 1212 [2023-11-19 07:55:50,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 163 flow. Second operand has 12 states, 12 states have (on average 478.9166666666667) internal successors, (5747), 12 states have internal predecessors, (5747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:50,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:50,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 1212 [2023-11-19 07:55:50,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:52,203 INFO L124 PetriNetUnfolderBase]: 3431/5231 cut-off events. [2023-11-19 07:55:52,203 INFO L125 PetriNetUnfolderBase]: For 638/638 co-relation queries the response was YES. [2023-11-19 07:55:52,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11939 conditions, 5231 events. 3431/5231 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28759 event pairs, 456 based on Foata normal form. 2/4752 useless extension candidates. Maximal degree in co-relation 11928. Up to 1131 conditions per place. [2023-11-19 07:55:52,249 INFO L140 encePairwiseOnDemand]: 1200/1212 looper letters, 220 selfloop transitions, 17 changer transitions 14/251 dead transitions. [2023-11-19 07:55:52,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 251 transitions, 1205 flow [2023-11-19 07:55:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:55:52,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 07:55:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 7853 transitions. [2023-11-19 07:55:52,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4049608085808581 [2023-11-19 07:55:52,280 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 7853 transitions. [2023-11-19 07:55:52,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 7853 transitions. [2023-11-19 07:55:52,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:52,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 7853 transitions. [2023-11-19 07:55:52,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 490.8125) internal successors, (7853), 16 states have internal predecessors, (7853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:52,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 1212.0) internal successors, (20604), 17 states have internal predecessors, (20604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:52,349 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 1212.0) internal successors, (20604), 17 states have internal predecessors, (20604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:52,349 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 163 flow. Second operand 16 states and 7853 transitions. [2023-11-19 07:55:52,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 251 transitions, 1205 flow [2023-11-19 07:55:52,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 251 transitions, 1199 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 07:55:52,388 INFO L231 Difference]: Finished difference. Result has 79 places, 63 transitions, 278 flow [2023-11-19 07:55:52,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=278, PETRI_PLACES=79, PETRI_TRANSITIONS=63} [2023-11-19 07:55:52,390 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2023-11-19 07:55:52,390 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 63 transitions, 278 flow [2023-11-19 07:55:52,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 478.9166666666667) internal successors, (5747), 12 states have internal predecessors, (5747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:52,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:52,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:52,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:55:52,392 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:52,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:52,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1894546445, now seen corresponding path program 2 times [2023-11-19 07:55:52,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:52,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323862585] [2023-11-19 07:55:52,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:52,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:55:53,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:53,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323862585] [2023-11-19 07:55:53,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323862585] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:53,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:53,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-19 07:55:53,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654356545] [2023-11-19 07:55:53,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:53,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:55:53,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:53,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:55:53,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:55:55,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 1212 [2023-11-19 07:55:55,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 63 transitions, 278 flow. Second operand has 13 states, 13 states have (on average 478.6923076923077) internal successors, (6223), 13 states have internal predecessors, (6223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:55,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:55,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 1212 [2023-11-19 07:55:55,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:57,723 INFO L124 PetriNetUnfolderBase]: 5426/8441 cut-off events. [2023-11-19 07:55:57,723 INFO L125 PetriNetUnfolderBase]: For 7766/7766 co-relation queries the response was YES. [2023-11-19 07:55:57,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23945 conditions, 8441 events. 5426/8441 cut-off events. For 7766/7766 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 52352 event pairs, 640 based on Foata normal form. 1/8441 useless extension candidates. Maximal degree in co-relation 23922. Up to 3255 conditions per place. [2023-11-19 07:55:57,827 INFO L140 encePairwiseOnDemand]: 1201/1212 looper letters, 142 selfloop transitions, 18 changer transitions 7/167 dead transitions. [2023-11-19 07:55:57,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 167 transitions, 982 flow [2023-11-19 07:55:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:55:57,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:55:57,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 5368 transitions. [2023-11-19 07:55:57,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40264026402640263 [2023-11-19 07:55:57,849 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 5368 transitions. [2023-11-19 07:55:57,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 5368 transitions. [2023-11-19 07:55:57,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:57,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 5368 transitions. [2023-11-19 07:55:57,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:57,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 1212.0) internal successors, (14544), 12 states have internal predecessors, (14544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:57,891 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 1212.0) internal successors, (14544), 12 states have internal predecessors, (14544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:57,891 INFO L175 Difference]: Start difference. First operand has 79 places, 63 transitions, 278 flow. Second operand 11 states and 5368 transitions. [2023-11-19 07:55:57,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 167 transitions, 982 flow [2023-11-19 07:55:58,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 167 transitions, 959 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-11-19 07:55:58,046 INFO L231 Difference]: Finished difference. Result has 89 places, 70 transitions, 384 flow [2023-11-19 07:55:58,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=384, PETRI_PLACES=89, PETRI_TRANSITIONS=70} [2023-11-19 07:55:58,047 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2023-11-19 07:55:58,048 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 70 transitions, 384 flow [2023-11-19 07:55:58,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 478.6923076923077) internal successors, (6223), 13 states have internal predecessors, (6223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:58,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:58,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:58,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:55:58,050 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:55:58,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:58,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2068981423, now seen corresponding path program 3 times [2023-11-19 07:55:58,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:58,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167627140] [2023-11-19 07:55:58,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:58,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:55:59,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:59,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167627140] [2023-11-19 07:55:59,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167627140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:59,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:59,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-19 07:55:59,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453367587] [2023-11-19 07:55:59,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:59,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:55:59,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:59,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:55:59,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156