./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue_ok_longest.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue_ok_longest.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl --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 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:26:27,123 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:26:27,255 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:26:27,266 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:26:27,267 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:26:27,306 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:26:27,308 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:26:27,309 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:26:27,310 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:26:27,315 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:26:27,316 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:26:27,317 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:26:27,317 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:26:27,319 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:26:27,320 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:26:27,320 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:26:27,321 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:26:27,321 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:26:27,322 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:26:27,322 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:26:27,323 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:26:27,323 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:26:27,324 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:26:27,324 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:26:27,324 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:26:27,325 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:26:27,326 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:26:27,326 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:26:27,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:26:27,327 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:26:27,328 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:26:27,329 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:26:27,329 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:26:27,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:26:27,330 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:26:27,330 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:26:27,330 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:26:27,330 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:26:27,330 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:26:27,331 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_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d [2023-11-12 02:26:27,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:26:27,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:26:27,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:26:27,696 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:26:27,696 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:26:27,698 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread/queue_ok_longest.i [2023-11-12 02:26:30,925 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:26:31,277 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:26:31,278 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/sv-benchmarks/c/pthread/queue_ok_longest.i [2023-11-12 02:26:31,301 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/data/b57fe359d/37f40117081d4e8089fe43c243f4ae07/FLAG1d7f0c08c [2023-11-12 02:26:31,317 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/data/b57fe359d/37f40117081d4e8089fe43c243f4ae07 [2023-11-12 02:26:31,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:26:31,326 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:26:31,328 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:26:31,328 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:26:31,338 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:26:31,339 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:26:31" (1/1) ... [2023-11-12 02:26:31,341 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3a9765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:31, skipping insertion in model container [2023-11-12 02:26:31,342 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:26:31" (1/1) ... [2023-11-12 02:26:31,395 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:26:31,963 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_3e826229-bd21-4240-a5ce-9c6152a47352/sv-benchmarks/c/pthread/queue_ok_longest.i[43280,43293] [2023-11-12 02:26:31,975 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_3e826229-bd21-4240-a5ce-9c6152a47352/sv-benchmarks/c/pthread/queue_ok_longest.i[43553,43566] [2023-11-12 02:26:31,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:26:32,005 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:26:32,057 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_3e826229-bd21-4240-a5ce-9c6152a47352/sv-benchmarks/c/pthread/queue_ok_longest.i[43280,43293] [2023-11-12 02:26:32,061 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_3e826229-bd21-4240-a5ce-9c6152a47352/sv-benchmarks/c/pthread/queue_ok_longest.i[43553,43566] [2023-11-12 02:26:32,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:26:32,207 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:26:32,208 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:32 WrapperNode [2023-11-12 02:26:32,208 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:26:32,209 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:26:32,210 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:26:32,210 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:26:32,220 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:32" (1/1) ... [2023-11-12 02:26:32,271 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:32" (1/1) ... [2023-11-12 02:26:32,324 INFO L138 Inliner]: procedures = 274, calls = 57, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 202 [2023-11-12 02:26:32,324 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:26:32,325 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:26:32,325 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:26:32,325 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:26:32,337 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:32" (1/1) ... [2023-11-12 02:26:32,338 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:32" (1/1) ... [2023-11-12 02:26:32,357 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:32" (1/1) ... [2023-11-12 02:26:32,358 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:32" (1/1) ... [2023-11-12 02:26:32,384 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:32" (1/1) ... [2023-11-12 02:26:32,388 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:32" (1/1) ... [2023-11-12 02:26:32,391 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:32" (1/1) ... [2023-11-12 02:26:32,405 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:32" (1/1) ... [2023-11-12 02:26:32,409 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:26:32,412 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:26:32,412 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:26:32,412 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:26:32,413 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:32" (1/1) ... [2023-11-12 02:26:32,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:26:32,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:32,470 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:26:32,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:26:32,528 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-12 02:26:32,529 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-12 02:26:32,529 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-12 02:26:32,529 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-12 02:26:32,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:26:32,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:26:32,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:26:32,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:26:32,532 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:26:32,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:26:32,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:26:32,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:26:32,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:26:32,535 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:26:32,717 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:26:32,719 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:26:33,097 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:26:33,109 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:26:33,110 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:26:33,113 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:26:33 BoogieIcfgContainer [2023-11-12 02:26:33,113 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:26:33,116 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:26:33,116 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:26:33,120 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:26:33,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:26:31" (1/3) ... [2023-11-12 02:26:33,121 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3022f6cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:26:33, skipping insertion in model container [2023-11-12 02:26:33,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:32" (2/3) ... [2023-11-12 02:26:33,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3022f6cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:26:33, skipping insertion in model container [2023-11-12 02:26:33,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:26:33" (3/3) ... [2023-11-12 02:26:33,124 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longest.i [2023-11-12 02:26:33,134 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:26:33,146 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:26:33,147 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 02:26:33,147 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:26:33,288 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:26:33,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 226 transitions, 466 flow [2023-11-12 02:26:33,483 INFO L124 PetriNetUnfolderBase]: 13/224 cut-off events. [2023-11-12 02:26:33,484 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:26:33,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 224 events. 13/224 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 372 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 147. Up to 3 conditions per place. [2023-11-12 02:26:33,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 226 transitions, 466 flow [2023-11-12 02:26:33,500 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 214 transitions, 437 flow [2023-11-12 02:26:33,506 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:26:33,543 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 208 places, 214 transitions, 437 flow [2023-11-12 02:26:33,546 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 208 places, 214 transitions, 437 flow [2023-11-12 02:26:33,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 214 transitions, 437 flow [2023-11-12 02:26:33,603 INFO L124 PetriNetUnfolderBase]: 13/214 cut-off events. [2023-11-12 02:26:33,603 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:26:33,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 214 events. 13/214 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 304 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 147. Up to 3 conditions per place. [2023-11-12 02:26:33,614 INFO L119 LiptonReduction]: Number of co-enabled transitions 10812 [2023-11-12 02:26:41,282 INFO L134 LiptonReduction]: Checked pairs total: 20702 [2023-11-12 02:26:41,282 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-11-12 02:26:41,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:26:41,307 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;@4627e935, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:26:41,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-12 02:26:41,309 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:26:41,309 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-12 02:26:41,309 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:26:41,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:41,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-12 02:26:41,311 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 2 more)] === [2023-11-12 02:26:41,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:41,316 INFO L85 PathProgramCache]: Analyzing trace with hash 881, now seen corresponding path program 1 times [2023-11-12 02:26:41,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:41,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322656631] [2023-11-12 02:26:41,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:41,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:41,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:41,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322656631] [2023-11-12 02:26:41,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322656631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:41,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:41,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-12 02:26:41,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620984370] [2023-11-12 02:26:41,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:41,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:26:41,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:41,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:26:41,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:26:41,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 428 [2023-11-12 02:26:41,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 103 flow. Second operand has 2 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:41,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:41,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 428 [2023-11-12 02:26:41,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:41,822 INFO L124 PetriNetUnfolderBase]: 902/1492 cut-off events. [2023-11-12 02:26:41,823 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-12 02:26:41,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2968 conditions, 1492 events. 902/1492 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6530 event pairs, 717 based on Foata normal form. 0/1224 useless extension candidates. Maximal degree in co-relation 2805. Up to 1425 conditions per place. [2023-11-12 02:26:41,841 INFO L140 encePairwiseOnDemand]: 427/428 looper letters, 41 selfloop transitions, 0 changer transitions 0/46 dead transitions. [2023-11-12 02:26:41,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 183 flow [2023-11-12 02:26:41,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:26:41,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:26:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 472 transitions. [2023-11-12 02:26:41,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5514018691588785 [2023-11-12 02:26:41,870 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 472 transitions. [2023-11-12 02:26:41,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 472 transitions. [2023-11-12 02:26:41,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:41,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 472 transitions. [2023-11-12 02:26:41,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 236.0) internal successors, (472), 2 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:41,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 428.0) internal successors, (1284), 3 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:41,894 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 428.0) internal successors, (1284), 3 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:41,896 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 103 flow. Second operand 2 states and 472 transitions. [2023-11-12 02:26:41,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 183 flow [2023-11-12 02:26:41,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:26:41,903 INFO L231 Difference]: Finished difference. Result has 44 places, 46 transitions, 96 flow [2023-11-12 02:26:41,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=96, PETRI_PLACES=44, PETRI_TRANSITIONS=46} [2023-11-12 02:26:41,910 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2023-11-12 02:26:41,910 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 46 transitions, 96 flow [2023-11-12 02:26:41,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:41,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:41,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:41,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:26:41,912 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:26:41,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:41,914 INFO L85 PathProgramCache]: Analyzing trace with hash 832002985, now seen corresponding path program 1 times [2023-11-12 02:26:41,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:41,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448756729] [2023-11-12 02:26:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:41,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:42,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:42,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448756729] [2023-11-12 02:26:42,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448756729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:42,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:42,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:26:42,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742794176] [2023-11-12 02:26:42,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:42,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:26:42,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:42,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:26:42,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:26:42,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 428 [2023-11-12 02:26:42,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 46 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:42,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:42,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 428 [2023-11-12 02:26:42,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:42,498 INFO L124 PetriNetUnfolderBase]: 319/612 cut-off events. [2023-11-12 02:26:42,498 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-12 02:26:42,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1226 conditions, 612 events. 319/612 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2681 event pairs, 223 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 1223. Up to 368 conditions per place. [2023-11-12 02:26:42,502 INFO L140 encePairwiseOnDemand]: 424/428 looper letters, 40 selfloop transitions, 2 changer transitions 11/55 dead transitions. [2023-11-12 02:26:42,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 219 flow [2023-11-12 02:26:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:26:42,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:26:42,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2023-11-12 02:26:42,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311526479750779 [2023-11-12 02:26:42,507 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2023-11-12 02:26:42,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2023-11-12 02:26:42,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:42,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2023-11-12 02:26:42,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:42,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:42,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:42,518 INFO L175 Difference]: Start difference. First operand has 44 places, 46 transitions, 96 flow. Second operand 3 states and 682 transitions. [2023-11-12 02:26:42,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 219 flow [2023-11-12 02:26:42,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 219 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:26:42,521 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 92 flow [2023-11-12 02:26:42,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-11-12 02:26:42,522 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-11-12 02:26:42,522 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 92 flow [2023-11-12 02:26:42,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:42,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:42,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:42,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:26:42,524 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:26:42,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:42,525 INFO L85 PathProgramCache]: Analyzing trace with hash -168236240, now seen corresponding path program 1 times [2023-11-12 02:26:42,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:42,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902269349] [2023-11-12 02:26:42,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:42,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:42,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:42,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902269349] [2023-11-12 02:26:42,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902269349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:42,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:42,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:26:42,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939183410] [2023-11-12 02:26:42,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:42,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:26:42,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:42,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:26:42,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:26:42,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 428 [2023-11-12 02:26:42,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:42,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:42,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 428 [2023-11-12 02:26:42,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:42,803 INFO L124 PetriNetUnfolderBase]: 243/476 cut-off events. [2023-11-12 02:26:42,804 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-12 02:26:42,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1007 conditions, 476 events. 243/476 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1635 event pairs, 147 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 1002. Up to 339 conditions per place. [2023-11-12 02:26:42,808 INFO L140 encePairwiseOnDemand]: 424/428 looper letters, 49 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-11-12 02:26:42,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 228 flow [2023-11-12 02:26:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:26:42,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:26:42,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 686 transitions. [2023-11-12 02:26:42,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342679127725857 [2023-11-12 02:26:42,812 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 686 transitions. [2023-11-12 02:26:42,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 686 transitions. [2023-11-12 02:26:42,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:42,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 686 transitions. [2023-11-12 02:26:42,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:42,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:42,821 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:42,822 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 92 flow. Second operand 3 states and 686 transitions. [2023-11-12 02:26:42,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 228 flow [2023-11-12 02:26:42,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:26:42,824 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 107 flow [2023-11-12 02:26:42,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-12 02:26:42,825 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2023-11-12 02:26:42,826 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 107 flow [2023-11-12 02:26:42,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:42,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:42,827 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] [2023-11-12 02:26:42,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:26:42,827 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:26:42,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:42,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1851483565, now seen corresponding path program 1 times [2023-11-12 02:26:42,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:42,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933454481] [2023-11-12 02:26:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:42,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:43,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:43,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933454481] [2023-11-12 02:26:43,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933454481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:43,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:43,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:26:43,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193727496] [2023-11-12 02:26:43,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:43,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:26:43,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:43,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:26:43,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:26:43,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 428 [2023-11-12 02:26:43,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:43,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:43,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 428 [2023-11-12 02:26:43,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:43,193 INFO L124 PetriNetUnfolderBase]: 175/362 cut-off events. [2023-11-12 02:26:43,193 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:26:43,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 362 events. 175/362 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1089 event pairs, 6 based on Foata normal form. 46/382 useless extension candidates. Maximal degree in co-relation 807. Up to 331 conditions per place. [2023-11-12 02:26:43,196 INFO L140 encePairwiseOnDemand]: 425/428 looper letters, 43 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-11-12 02:26:43,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 48 transitions, 214 flow [2023-11-12 02:26:43,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:26:43,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:26:43,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2023-11-12 02:26:43,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241433021806854 [2023-11-12 02:26:43,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2023-11-12 02:26:43,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2023-11-12 02:26:43,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:43,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2023-11-12 02:26:43,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:43,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:43,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:43,210 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 107 flow. Second operand 3 states and 673 transitions. [2023-11-12 02:26:43,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 48 transitions, 214 flow [2023-11-12 02:26:43,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 48 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:26:43,214 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 110 flow [2023-11-12 02:26:43,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-11-12 02:26:43,216 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2023-11-12 02:26:43,216 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 110 flow [2023-11-12 02:26:43,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:43,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:43,218 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] [2023-11-12 02:26:43,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:26:43,218 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:26:43,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:43,220 INFO L85 PathProgramCache]: Analyzing trace with hash 573764111, now seen corresponding path program 1 times [2023-11-12 02:26:43,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:43,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517025613] [2023-11-12 02:26:43,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:43,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:43,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:43,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517025613] [2023-11-12 02:26:43,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517025613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:43,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70175740] [2023-11-12 02:26:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:43,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:43,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:43,362 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:43,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:26:43,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:43,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:26:43,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:43,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:43,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:43,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70175740] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:26:43,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:26:43,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-12 02:26:43,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031514277] [2023-11-12 02:26:43,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:26:43,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:26:43,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:43,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:26:43,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:26:43,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 428 [2023-11-12 02:26:43,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 215.85714285714286) internal successors, (1511), 7 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:43,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:43,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 428 [2023-11-12 02:26:43,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:43,882 INFO L124 PetriNetUnfolderBase]: 243/514 cut-off events. [2023-11-12 02:26:43,882 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-12 02:26:43,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 514 events. 243/514 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1368 event pairs, 85 based on Foata normal form. 12/492 useless extension candidates. Maximal degree in co-relation 1171. Up to 205 conditions per place. [2023-11-12 02:26:43,886 INFO L140 encePairwiseOnDemand]: 423/428 looper letters, 73 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2023-11-12 02:26:43,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 86 transitions, 380 flow [2023-11-12 02:26:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:26:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:26:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1346 transitions. [2023-11-12 02:26:43,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241433021806854 [2023-11-12 02:26:43,893 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1346 transitions. [2023-11-12 02:26:43,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1346 transitions. [2023-11-12 02:26:43,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:43,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1346 transitions. [2023-11-12 02:26:43,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 224.33333333333334) internal successors, (1346), 6 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:43,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 428.0) internal successors, (2996), 7 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:43,909 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 428.0) internal successors, (2996), 7 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:43,909 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 110 flow. Second operand 6 states and 1346 transitions. [2023-11-12 02:26:43,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 86 transitions, 380 flow [2023-11-12 02:26:43,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 86 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:26:43,913 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 170 flow [2023-11-12 02:26:43,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-11-12 02:26:43,914 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 6 predicate places. [2023-11-12 02:26:43,915 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 170 flow [2023-11-12 02:26:43,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 215.85714285714286) internal successors, (1511), 7 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:43,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:43,917 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:43,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:26:44,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:44,124 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:26:44,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:44,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1585663574, now seen corresponding path program 2 times [2023-11-12 02:26:44,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:44,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790284527] [2023-11-12 02:26:44,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:44,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:44,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:44,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790284527] [2023-11-12 02:26:44,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790284527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:44,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741640083] [2023-11-12 02:26:44,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:26:44,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:44,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:44,348 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:44,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:26:44,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:26:44,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:26:44,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:26:44,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:44,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:44,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741640083] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:26:44,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:26:44,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-12 02:26:44,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704439762] [2023-11-12 02:26:44,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:26:44,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:26:44,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:44,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:26:44,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:26:44,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 428 [2023-11-12 02:26:44,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 170 flow. Second operand has 13 states, 13 states have (on average 216.46153846153845) internal successors, (2814), 13 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:44,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:44,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 428 [2023-11-12 02:26:44,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:45,401 INFO L124 PetriNetUnfolderBase]: 447/958 cut-off events. [2023-11-12 02:26:45,401 INFO L125 PetriNetUnfolderBase]: For 327/327 co-relation queries the response was YES. [2023-11-12 02:26:45,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2469 conditions, 958 events. 447/958 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 2553 event pairs, 85 based on Foata normal form. 24/924 useless extension candidates. Maximal degree in co-relation 2459. Up to 205 conditions per place. [2023-11-12 02:26:45,410 INFO L140 encePairwiseOnDemand]: 423/428 looper letters, 145 selfloop transitions, 22 changer transitions 0/170 dead transitions. [2023-11-12 02:26:45,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 170 transitions, 872 flow [2023-11-12 02:26:45,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:26:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:26:45,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2693 transitions. [2023-11-12 02:26:45,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5243380062305296 [2023-11-12 02:26:45,423 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2693 transitions. [2023-11-12 02:26:45,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2693 transitions. [2023-11-12 02:26:45,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:45,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2693 transitions. [2023-11-12 02:26:45,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 224.41666666666666) internal successors, (2693), 12 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:45,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 428.0) internal successors, (5564), 13 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:45,448 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 428.0) internal successors, (5564), 13 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:45,448 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 170 flow. Second operand 12 states and 2693 transitions. [2023-11-12 02:26:45,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 170 transitions, 872 flow [2023-11-12 02:26:45,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 170 transitions, 833 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-11-12 02:26:45,460 INFO L231 Difference]: Finished difference. Result has 70 places, 60 transitions, 320 flow [2023-11-12 02:26:45,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=320, PETRI_PLACES=70, PETRI_TRANSITIONS=60} [2023-11-12 02:26:45,462 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 23 predicate places. [2023-11-12 02:26:45,462 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 60 transitions, 320 flow [2023-11-12 02:26:45,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 216.46153846153845) internal successors, (2814), 13 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:45,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:45,464 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:45,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:45,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:45,671 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:26:45,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:45,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2005191414, now seen corresponding path program 3 times [2023-11-12 02:26:45,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:45,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522175607] [2023-11-12 02:26:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:45,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:46,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:46,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522175607] [2023-11-12 02:26:46,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522175607] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:46,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919979317] [2023-11-12 02:26:46,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:26:46,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:46,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:46,224 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:46,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:26:46,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-12 02:26:46,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:26:46,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-12 02:26:47,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:47,683 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 02:26:47,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:26:47,732 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:26:47,820 INFO L322 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-12 02:26:47,821 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 29 [2023-11-12 02:26:47,896 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-12 02:26:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 76 proven. 45 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-12 02:26:47,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:48,199 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:26:48,200 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 39 [2023-11-12 02:26:48,212 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:26:48,213 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 61 [2023-11-12 02:26:48,222 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-11-12 02:26:48,243 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-12 02:26:48,269 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:26:48,269 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-12 02:26:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-12 02:26:48,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919979317] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:26:48,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:26:48,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 9] total 27 [2023-11-12 02:26:48,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992890231] [2023-11-12 02:26:48,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:26:48,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-12 02:26:48,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:48,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-12 02:26:48,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=528, Unknown=2, NotChecked=0, Total=702 [2023-11-12 02:26:50,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 428 [2023-11-12 02:26:50,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 60 transitions, 320 flow. Second operand has 27 states, 27 states have (on average 165.33333333333334) internal successors, (4464), 27 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:50,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:50,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 428 [2023-11-12 02:26:50,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:53,459 INFO L124 PetriNetUnfolderBase]: 884/1936 cut-off events. [2023-11-12 02:26:53,459 INFO L125 PetriNetUnfolderBase]: For 1952/1954 co-relation queries the response was YES. [2023-11-12 02:26:53,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5281 conditions, 1936 events. 884/1936 cut-off events. For 1952/1954 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 6688 event pairs, 69 based on Foata normal form. 25/1885 useless extension candidates. Maximal degree in co-relation 5264. Up to 275 conditions per place. [2023-11-12 02:26:53,479 INFO L140 encePairwiseOnDemand]: 416/428 looper letters, 334 selfloop transitions, 147 changer transitions 0/483 dead transitions. [2023-11-12 02:26:53,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 483 transitions, 2563 flow [2023-11-12 02:26:53,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-12 02:26:53,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-11-12 02:26:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 11540 transitions. [2023-11-12 02:26:53,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3907625626439117 [2023-11-12 02:26:53,528 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 11540 transitions. [2023-11-12 02:26:53,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 11540 transitions. [2023-11-12 02:26:53,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:53,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 11540 transitions. [2023-11-12 02:26:53,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 167.2463768115942) internal successors, (11540), 69 states have internal predecessors, (11540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:53,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 428.0) internal successors, (29960), 70 states have internal predecessors, (29960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:53,655 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 428.0) internal successors, (29960), 70 states have internal predecessors, (29960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:53,656 INFO L175 Difference]: Start difference. First operand has 70 places, 60 transitions, 320 flow. Second operand 69 states and 11540 transitions. [2023-11-12 02:26:53,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 483 transitions, 2563 flow [2023-11-12 02:26:53,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 483 transitions, 2548 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:26:53,675 INFO L231 Difference]: Finished difference. Result has 168 places, 206 transitions, 1430 flow [2023-11-12 02:26:53,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=1430, PETRI_PLACES=168, PETRI_TRANSITIONS=206} [2023-11-12 02:26:53,676 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 121 predicate places. [2023-11-12 02:26:53,677 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 206 transitions, 1430 flow [2023-11-12 02:26:53,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 165.33333333333334) internal successors, (4464), 27 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:53,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:53,679 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:53,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:53,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:26:53,889 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:26:53,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:53,889 INFO L85 PathProgramCache]: Analyzing trace with hash -168055285, now seen corresponding path program 1 times [2023-11-12 02:26:53,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:53,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154068036] [2023-11-12 02:26:53,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:53,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:54,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:54,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154068036] [2023-11-12 02:26:54,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154068036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:26:54,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115029320] [2023-11-12 02:26:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:54,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:54,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:54,802 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:54,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:26:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:55,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 02:26:55,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:55,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:26:55,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115029320] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:26:55,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:26:55,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2023-11-12 02:26:55,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854938562] [2023-11-12 02:26:55,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:26:55,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-12 02:26:55,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:55,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-12 02:26:55,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-11-12 02:26:55,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 428 [2023-11-12 02:26:55,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 206 transitions, 1430 flow. Second operand has 31 states, 31 states have (on average 217.1290322580645) internal successors, (6731), 31 states have internal predecessors, (6731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:55,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:26:55,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 428 [2023-11-12 02:26:55,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:26:57,961 INFO L124 PetriNetUnfolderBase]: 1727/3850 cut-off events. [2023-11-12 02:26:57,962 INFO L125 PetriNetUnfolderBase]: For 40196/40196 co-relation queries the response was YES. [2023-11-12 02:26:57,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17149 conditions, 3850 events. 1727/3850 cut-off events. For 40196/40196 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 13483 event pairs, 124 based on Foata normal form. 120/3946 useless extension candidates. Maximal degree in co-relation 17098. Up to 541 conditions per place. [2023-11-12 02:26:58,018 INFO L140 encePairwiseOnDemand]: 423/428 looper letters, 571 selfloop transitions, 87 changer transitions 0/661 dead transitions. [2023-11-12 02:26:58,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 661 transitions, 7048 flow [2023-11-12 02:26:58,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-12 02:26:58,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-12 02:26:58,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6734 transitions. [2023-11-12 02:26:58,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244548286604361 [2023-11-12 02:26:58,034 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6734 transitions. [2023-11-12 02:26:58,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6734 transitions. [2023-11-12 02:26:58,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:26:58,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6734 transitions. [2023-11-12 02:26:58,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 224.46666666666667) internal successors, (6734), 30 states have internal predecessors, (6734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:58,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 428.0) internal successors, (13268), 31 states have internal predecessors, (13268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:58,080 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 428.0) internal successors, (13268), 31 states have internal predecessors, (13268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:58,080 INFO L175 Difference]: Start difference. First operand has 168 places, 206 transitions, 1430 flow. Second operand 30 states and 6734 transitions. [2023-11-12 02:26:58,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 661 transitions, 7048 flow [2023-11-12 02:26:58,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 661 transitions, 6732 flow, removed 20 selfloop flow, removed 12 redundant places. [2023-11-12 02:26:58,230 INFO L231 Difference]: Finished difference. Result has 201 places, 253 transitions, 2088 flow [2023-11-12 02:26:58,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2088, PETRI_PLACES=201, PETRI_TRANSITIONS=253} [2023-11-12 02:26:58,234 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 154 predicate places. [2023-11-12 02:26:58,235 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 253 transitions, 2088 flow [2023-11-12 02:26:58,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 217.1290322580645) internal successors, (6731), 31 states have internal predecessors, (6731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:26:58,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:26:58,238 INFO L208 CegarLoopForPetriNet]: trace histogram [28, 28, 28, 28, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:58,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:58,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:26:58,445 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:26:58,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:58,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1026824214, now seen corresponding path program 2 times [2023-11-12 02:26:58,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:58,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10264739] [2023-11-12 02:26:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:58,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2373 backedges. 0 proven. 2373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:00,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:00,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10264739] [2023-11-12 02:27:00,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10264739] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:00,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385040625] [2023-11-12 02:27:00,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:27:00,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:00,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:00,735 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:00,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:27:01,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:27:01,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:27:01,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 1513 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-12 02:27:01,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2373 backedges. 0 proven. 2373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:01,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:27:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2373 backedges. 0 proven. 2373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:03,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385040625] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:27:03,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:27:03,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2023-11-12 02:27:03,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594197252] [2023-11-12 02:27:03,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:27:03,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-12 02:27:03,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:03,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-12 02:27:03,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-11-12 02:27:03,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 428 [2023-11-12 02:27:03,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 253 transitions, 2088 flow. Second operand has 61 states, 61 states have (on average 217.37704918032787) internal successors, (13260), 61 states have internal predecessors, (13260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:03,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:03,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 428 [2023-11-12 02:27:03,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:09,004 INFO L124 PetriNetUnfolderBase]: 3437/7690 cut-off events. [2023-11-12 02:27:09,004 INFO L125 PetriNetUnfolderBase]: For 151452/151452 co-relation queries the response was YES. [2023-11-12 02:27:09,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36004 conditions, 7690 events. 3437/7690 cut-off events. For 151452/151452 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 27089 event pairs, 124 based on Foata normal form. 240/7906 useless extension candidates. Maximal degree in co-relation 35938. Up to 1081 conditions per place. [2023-11-12 02:27:09,107 INFO L140 encePairwiseOnDemand]: 423/428 looper letters, 1171 selfloop transitions, 177 changer transitions 0/1351 dead transitions. [2023-11-12 02:27:09,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1351 transitions, 15015 flow [2023-11-12 02:27:09,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-12 02:27:09,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-11-12 02:27:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 13469 transitions. [2023-11-12 02:27:09,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244937694704049 [2023-11-12 02:27:09,127 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 13469 transitions. [2023-11-12 02:27:09,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 13469 transitions. [2023-11-12 02:27:09,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:09,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 13469 transitions. [2023-11-12 02:27:09,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 224.48333333333332) internal successors, (13469), 60 states have internal predecessors, (13469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:09,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 428.0) internal successors, (26108), 61 states have internal predecessors, (26108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:09,189 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 428.0) internal successors, (26108), 61 states have internal predecessors, (26108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:09,189 INFO L175 Difference]: Start difference. First operand has 201 places, 253 transitions, 2088 flow. Second operand 60 states and 13469 transitions. [2023-11-12 02:27:09,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1351 transitions, 15015 flow [2023-11-12 02:27:09,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 1351 transitions, 14946 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-12 02:27:09,672 INFO L231 Difference]: Finished difference. Result has 279 places, 345 transitions, 4006 flow [2023-11-12 02:27:09,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=2019, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=4006, PETRI_PLACES=279, PETRI_TRANSITIONS=345} [2023-11-12 02:27:09,673 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 232 predicate places. [2023-11-12 02:27:09,673 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 345 transitions, 4006 flow [2023-11-12 02:27:09,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 217.37704918032787) internal successors, (13260), 61 states have internal predecessors, (13260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:09,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:09,678 INFO L208 CegarLoopForPetriNet]: trace histogram [58, 58, 58, 58, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:09,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:09,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e826229-bd21-4240-a5ce-9c6152a47352/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:09,886 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:27:09,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:09,887 INFO L85 PathProgramCache]: Analyzing trace with hash -310905643, now seen corresponding path program 3 times [2023-11-12 02:27:09,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:09,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865362515] [2023-11-12 02:27:09,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:09,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat