./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longer-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:43:27,766 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:43:27,881 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:43:27,888 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:43:27,889 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:43:27,924 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:43:27,925 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:43:27,926 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:43:27,927 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:43:27,932 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:43:27,932 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:43:27,933 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:43:27,933 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:43:27,935 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:43:27,936 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:43:27,936 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:43:27,936 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:43:27,937 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:43:27,937 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:43:27,938 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:43:27,938 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:43:27,939 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:43:27,939 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:43:27,939 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:43:27,940 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:43:27,958 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:43:27,959 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:43:27,959 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:43:27,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:43:27,960 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:43:27,961 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:43:27,962 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:43:27,962 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:43:27,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:43:27,963 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:43:27,963 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:43:27,963 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:43:27,964 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:43:27,964 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:43:27,964 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_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 [2023-11-19 07:43:28,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:43:28,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:43:28,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:43:28,249 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:43:28,250 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:43:28,251 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/stack_longer-2.i [2023-11-19 07:43:31,292 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:43:31,638 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:43:31,639 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/sv-benchmarks/c/pthread/stack_longer-2.i [2023-11-19 07:43:31,667 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/data/98406a8bd/8816b7552d4242f8a636945692c4452c/FLAG2e6430e7e [2023-11-19 07:43:31,685 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/data/98406a8bd/8816b7552d4242f8a636945692c4452c [2023-11-19 07:43:31,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:43:31,692 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:43:31,696 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:43:31,696 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:43:31,701 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:43:31,702 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:43:31" (1/1) ... [2023-11-19 07:43:31,703 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@172dd20c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:31, skipping insertion in model container [2023-11-19 07:43:31,703 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:43:31" (1/1) ... [2023-11-19 07:43:31,765 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:43:32,260 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_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2023-11-19 07:43:32,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:43:32,302 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:43:32,342 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_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2023-11-19 07:43:32,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:43:32,425 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:43:32,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:32 WrapperNode [2023-11-19 07:43:32,426 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:43:32,427 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:43:32,427 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:43:32,428 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:43:32,436 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:32" (1/1) ... [2023-11-19 07:43:32,456 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:32" (1/1) ... [2023-11-19 07:43:32,512 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 148 [2023-11-19 07:43:32,513 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:43:32,514 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:43:32,514 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:43:32,514 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:43:32,524 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:32" (1/1) ... [2023-11-19 07:43:32,524 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:32" (1/1) ... [2023-11-19 07:43:32,529 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:32" (1/1) ... [2023-11-19 07:43:32,529 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:32" (1/1) ... [2023-11-19 07:43:32,561 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:32" (1/1) ... [2023-11-19 07:43:32,579 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:32" (1/1) ... [2023-11-19 07:43:32,582 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:32" (1/1) ... [2023-11-19 07:43:32,584 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:32" (1/1) ... [2023-11-19 07:43:32,588 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:43:32,595 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:43:32,596 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:43:32,596 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:43:32,597 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:32" (1/1) ... [2023-11-19 07:43:32,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:43:32,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:32,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:43:32,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:43:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-19 07:43:32,673 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-19 07:43:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-19 07:43:32,673 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-19 07:43:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:43:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:43:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:43:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:43:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:43:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:43:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:43:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:43:32,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:43:32,676 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:43:32,852 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:43:32,855 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:43:33,272 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:43:33,283 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:43:33,284 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:43:33,288 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:43:33 BoogieIcfgContainer [2023-11-19 07:43:33,288 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:43:33,292 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:43:33,292 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:43:33,296 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:43:33,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:43:31" (1/3) ... [2023-11-19 07:43:33,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356e2326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:43:33, skipping insertion in model container [2023-11-19 07:43:33,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:32" (2/3) ... [2023-11-19 07:43:33,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356e2326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:43:33, skipping insertion in model container [2023-11-19 07:43:33,300 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:43:33" (3/3) ... [2023-11-19 07:43:33,301 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2023-11-19 07:43:33,309 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:43:33,320 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:43:33,320 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 07:43:33,320 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:43:33,480 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:43:33,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 159 transitions, 332 flow [2023-11-19 07:43:33,635 INFO L124 PetriNetUnfolderBase]: 10/157 cut-off events. [2023-11-19 07:43:33,635 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:43:33,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 157 events. 10/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 375 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 119. Up to 3 conditions per place. [2023-11-19 07:43:33,643 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 159 transitions, 332 flow [2023-11-19 07:43:33,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 147 transitions, 303 flow [2023-11-19 07:43:33,654 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:43:33,665 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 147 transitions, 303 flow [2023-11-19 07:43:33,669 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 147 transitions, 303 flow [2023-11-19 07:43:33,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 147 transitions, 303 flow [2023-11-19 07:43:33,740 INFO L124 PetriNetUnfolderBase]: 10/147 cut-off events. [2023-11-19 07:43:33,740 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:43:33,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 147 events. 10/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 300 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 119. Up to 3 conditions per place. [2023-11-19 07:43:33,752 INFO L119 LiptonReduction]: Number of co-enabled transitions 7432 [2023-11-19 07:43:38,607 INFO L134 LiptonReduction]: Checked pairs total: 10222 [2023-11-19 07:43:38,608 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-11-19 07:43:38,642 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:43:38,651 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;@f031eb1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:43:38,653 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 07:43:38,661 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:43:38,662 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-11-19 07:43:38,662 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:43:38,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:38,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:43:38,663 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:43:38,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:38,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2002758716, now seen corresponding path program 1 times [2023-11-19 07:43:38,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:38,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541773073] [2023-11-19 07:43:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:38,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:39,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:39,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541773073] [2023-11-19 07:43:39,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541773073] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:43:39,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:43:39,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:43:39,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047789520] [2023-11-19 07:43:39,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:43:39,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:43:39,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:39,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:43:39,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:43:39,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 305 [2023-11-19 07:43:39,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:39,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:39,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 305 [2023-11-19 07:43:39,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:39,407 INFO L124 PetriNetUnfolderBase]: 539/918 cut-off events. [2023-11-19 07:43:39,408 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-11-19 07:43:39,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 918 events. 539/918 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3449 event pairs, 227 based on Foata normal form. 20/748 useless extension candidates. Maximal degree in co-relation 1680. Up to 573 conditions per place. [2023-11-19 07:43:39,420 INFO L140 encePairwiseOnDemand]: 300/305 looper letters, 46 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-11-19 07:43:39,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 215 flow [2023-11-19 07:43:39,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:43:39,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:43:39,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-11-19 07:43:39,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5180327868852459 [2023-11-19 07:43:39,447 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-11-19 07:43:39,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-11-19 07:43:39,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:39,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-11-19 07:43:39,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:39,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:39,465 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:39,467 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 73 flow. Second operand 3 states and 474 transitions. [2023-11-19 07:43:39,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 215 flow [2023-11-19 07:43:39,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 51 transitions, 207 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:43:39,474 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2023-11-19 07:43:39,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-11-19 07:43:39,479 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-11-19 07:43:39,480 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2023-11-19 07:43:39,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:39,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:39,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:43:39,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:43:39,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:43:39,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:39,482 INFO L85 PathProgramCache]: Analyzing trace with hash -827844776, now seen corresponding path program 1 times [2023-11-19 07:43:39,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:39,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639740835] [2023-11-19 07:43:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:39,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:39,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:39,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639740835] [2023-11-19 07:43:39,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639740835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:43:39,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:43:39,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:43:39,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555009501] [2023-11-19 07:43:39,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:43:39,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:43:39,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:39,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:43:39,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:43:39,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 305 [2023-11-19 07:43:39,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:39,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:39,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 305 [2023-11-19 07:43:39,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:39,836 INFO L124 PetriNetUnfolderBase]: 593/1022 cut-off events. [2023-11-19 07:43:39,836 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-11-19 07:43:39,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2144 conditions, 1022 events. 593/1022 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4473 event pairs, 271 based on Foata normal form. 0/866 useless extension candidates. Maximal degree in co-relation 1916. Up to 877 conditions per place. [2023-11-19 07:43:39,845 INFO L140 encePairwiseOnDemand]: 302/305 looper letters, 45 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-11-19 07:43:39,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 50 transitions, 222 flow [2023-11-19 07:43:39,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:43:39,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:43:39,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-11-19 07:43:39,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5245901639344263 [2023-11-19 07:43:39,849 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-11-19 07:43:39,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-11-19 07:43:39,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:39,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-11-19 07:43:39,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:39,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:39,856 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:39,857 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 3 states and 480 transitions. [2023-11-19 07:43:39,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 50 transitions, 222 flow [2023-11-19 07:43:39,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 50 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:43:39,860 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 97 flow [2023-11-19 07:43:39,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2023-11-19 07:43:39,861 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-11-19 07:43:39,862 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 97 flow [2023-11-19 07:43:39,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:39,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:39,863 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:43:39,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:43:39,863 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:43:39,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:39,864 INFO L85 PathProgramCache]: Analyzing trace with hash -619458142, now seen corresponding path program 1 times [2023-11-19 07:43:39,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:39,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085185625] [2023-11-19 07:43:39,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:39,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:40,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:40,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085185625] [2023-11-19 07:43:40,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085185625] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:43:40,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494653159] [2023-11-19 07:43:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:40,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:40,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:40,022 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:43:40,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:43:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:40,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:43:40,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:43:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:40,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:43:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:40,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494653159] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:43:40,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:43:40,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-19 07:43:40,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636992854] [2023-11-19 07:43:40,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:43:40,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:43:40,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:40,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:43:40,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:43:40,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 305 [2023-11-19 07:43:40,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 97 flow. Second operand has 10 states, 10 states have (on average 139.4) internal successors, (1394), 10 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:40,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:40,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 305 [2023-11-19 07:43:40,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:41,145 INFO L124 PetriNetUnfolderBase]: 1619/2654 cut-off events. [2023-11-19 07:43:41,146 INFO L125 PetriNetUnfolderBase]: For 839/839 co-relation queries the response was YES. [2023-11-19 07:43:41,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6125 conditions, 2654 events. 1619/2654 cut-off events. For 839/839 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 12110 event pairs, 246 based on Foata normal form. 82/2392 useless extension candidates. Maximal degree in co-relation 5686. Up to 795 conditions per place. [2023-11-19 07:43:41,167 INFO L140 encePairwiseOnDemand]: 297/305 looper letters, 155 selfloop transitions, 26 changer transitions 3/184 dead transitions. [2023-11-19 07:43:41,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 184 transitions, 855 flow [2023-11-19 07:43:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:43:41,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:43:41,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1819 transitions. [2023-11-19 07:43:41,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4969945355191257 [2023-11-19 07:43:41,175 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1819 transitions. [2023-11-19 07:43:41,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1819 transitions. [2023-11-19 07:43:41,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:41,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1819 transitions. [2023-11-19 07:43:41,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 151.58333333333334) internal successors, (1819), 12 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:41,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 305.0) internal successors, (3965), 13 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:41,196 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 305.0) internal successors, (3965), 13 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:41,196 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 97 flow. Second operand 12 states and 1819 transitions. [2023-11-19 07:43:41,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 184 transitions, 855 flow [2023-11-19 07:43:41,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 184 transitions, 840 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:43:41,205 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 309 flow [2023-11-19 07:43:41,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=309, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2023-11-19 07:43:41,206 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-11-19 07:43:41,207 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 309 flow [2023-11-19 07:43:41,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 139.4) internal successors, (1394), 10 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:41,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:41,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:43:41,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:43:41,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:41,430 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:43:41,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:41,430 INFO L85 PathProgramCache]: Analyzing trace with hash 496137188, now seen corresponding path program 1 times [2023-11-19 07:43:41,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:41,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095664179] [2023-11-19 07:43:41,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:41,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:41,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:41,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095664179] [2023-11-19 07:43:41,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095664179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:43:41,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:43:41,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:43:41,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222893408] [2023-11-19 07:43:41,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:43:41,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:43:41,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:41,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:43:41,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:43:41,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 305 [2023-11-19 07:43:41,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:41,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:41,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 305 [2023-11-19 07:43:41,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:41,745 INFO L124 PetriNetUnfolderBase]: 512/977 cut-off events. [2023-11-19 07:43:41,746 INFO L125 PetriNetUnfolderBase]: For 557/557 co-relation queries the response was YES. [2023-11-19 07:43:41,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 977 events. 512/977 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4151 event pairs, 98 based on Foata normal form. 0/889 useless extension candidates. Maximal degree in co-relation 2360. Up to 670 conditions per place. [2023-11-19 07:43:41,756 INFO L140 encePairwiseOnDemand]: 300/305 looper letters, 42 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2023-11-19 07:43:41,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 342 flow [2023-11-19 07:43:41,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:43:41,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:43:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-11-19 07:43:41,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103825136612021 [2023-11-19 07:43:41,760 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-11-19 07:43:41,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-11-19 07:43:41,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:41,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-11-19 07:43:41,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:41,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:41,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:41,767 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 309 flow. Second operand 3 states and 467 transitions. [2023-11-19 07:43:41,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 342 flow [2023-11-19 07:43:41,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 321 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-11-19 07:43:41,807 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 216 flow [2023-11-19 07:43:41,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-11-19 07:43:41,808 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2023-11-19 07:43:41,809 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 216 flow [2023-11-19 07:43:41,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:41,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:41,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:43:41,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:43:41,814 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:43:41,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:41,815 INFO L85 PathProgramCache]: Analyzing trace with hash 74118836, now seen corresponding path program 1 times [2023-11-19 07:43:41,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:41,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324698793] [2023-11-19 07:43:41,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:41,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:41,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:41,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324698793] [2023-11-19 07:43:41,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324698793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:43:41,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:43:41,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:43:41,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112305884] [2023-11-19 07:43:41,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:43:41,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:43:41,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:41,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:43:41,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:43:41,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 305 [2023-11-19 07:43:41,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:41,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:41,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 305 [2023-11-19 07:43:41,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:42,112 INFO L124 PetriNetUnfolderBase]: 575/1096 cut-off events. [2023-11-19 07:43:42,113 INFO L125 PetriNetUnfolderBase]: For 447/447 co-relation queries the response was YES. [2023-11-19 07:43:42,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2810 conditions, 1096 events. 575/1096 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 4630 event pairs, 353 based on Foata normal form. 24/1120 useless extension candidates. Maximal degree in co-relation 2270. Up to 773 conditions per place. [2023-11-19 07:43:42,122 INFO L140 encePairwiseOnDemand]: 299/305 looper letters, 50 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2023-11-19 07:43:42,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 367 flow [2023-11-19 07:43:42,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:43:42,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:43:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-11-19 07:43:42,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158469945355191 [2023-11-19 07:43:42,126 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-11-19 07:43:42,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-11-19 07:43:42,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:42,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-11-19 07:43:42,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 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) [2023-11-19 07:43:42,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:42,132 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:42,132 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 216 flow. Second operand 3 states and 472 transitions. [2023-11-19 07:43:42,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 367 flow [2023-11-19 07:43:42,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 359 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:43:42,138 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 248 flow [2023-11-19 07:43:42,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-11-19 07:43:42,139 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2023-11-19 07:43:42,139 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 248 flow [2023-11-19 07:43:42,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:42,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:42,140 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] [2023-11-19 07:43:42,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:43:42,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:43:42,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:42,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1624983047, now seen corresponding path program 1 times [2023-11-19 07:43:42,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:42,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582176998] [2023-11-19 07:43:42,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:42,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:42,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:42,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:42,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582176998] [2023-11-19 07:43:42,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582176998] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:43:42,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:43:42,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 07:43:42,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520798024] [2023-11-19 07:43:42,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:43:42,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:43:42,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:42,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:43:42,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:43:43,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 305 [2023-11-19 07:43:43,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 248 flow. Second operand has 11 states, 11 states have (on average 123.81818181818181) internal successors, (1362), 11 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:43,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:43,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 305 [2023-11-19 07:43:43,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:44,286 INFO L124 PetriNetUnfolderBase]: 808/1544 cut-off events. [2023-11-19 07:43:44,286 INFO L125 PetriNetUnfolderBase]: For 1167/1167 co-relation queries the response was YES. [2023-11-19 07:43:44,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3961 conditions, 1544 events. 808/1544 cut-off events. For 1167/1167 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 7398 event pairs, 255 based on Foata normal form. 0/1526 useless extension candidates. Maximal degree in co-relation 2318. Up to 882 conditions per place. [2023-11-19 07:43:44,299 INFO L140 encePairwiseOnDemand]: 295/305 looper letters, 79 selfloop transitions, 11 changer transitions 14/113 dead transitions. [2023-11-19 07:43:44,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 113 transitions, 670 flow [2023-11-19 07:43:44,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:43:44,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:43:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1189 transitions. [2023-11-19 07:43:44,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331511839708561 [2023-11-19 07:43:44,306 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1189 transitions. [2023-11-19 07:43:44,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1189 transitions. [2023-11-19 07:43:44,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:44,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1189 transitions. [2023-11-19 07:43:44,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:44,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 305.0) internal successors, (3050), 10 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:44,320 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 305.0) internal successors, (3050), 10 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:44,321 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 248 flow. Second operand 9 states and 1189 transitions. [2023-11-19 07:43:44,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 113 transitions, 670 flow [2023-11-19 07:43:44,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 113 transitions, 632 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-19 07:43:44,331 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 315 flow [2023-11-19 07:43:44,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=315, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-11-19 07:43:44,334 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2023-11-19 07:43:44,334 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 315 flow [2023-11-19 07:43:44,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 123.81818181818181) internal successors, (1362), 11 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:44,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:44,336 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] [2023-11-19 07:43:44,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:43:44,336 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:43:44,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:44,337 INFO L85 PathProgramCache]: Analyzing trace with hash -91579103, now seen corresponding path program 2 times [2023-11-19 07:43:44,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:44,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721029099] [2023-11-19 07:43:44,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:44,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:45,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:45,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721029099] [2023-11-19 07:43:45,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721029099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:43:45,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:43:45,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 07:43:45,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370076087] [2023-11-19 07:43:45,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:43:45,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:43:45,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:45,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:43:45,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:43:45,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 305 [2023-11-19 07:43:45,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 315 flow. Second operand has 11 states, 11 states have (on average 123.81818181818181) internal successors, (1362), 11 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:45,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:45,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 305 [2023-11-19 07:43:45,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:46,591 INFO L124 PetriNetUnfolderBase]: 1026/1951 cut-off events. [2023-11-19 07:43:46,591 INFO L125 PetriNetUnfolderBase]: For 1279/1279 co-relation queries the response was YES. [2023-11-19 07:43:46,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5302 conditions, 1951 events. 1026/1951 cut-off events. For 1279/1279 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 9758 event pairs, 341 based on Foata normal form. 0/1928 useless extension candidates. Maximal degree in co-relation 4001. Up to 831 conditions per place. [2023-11-19 07:43:46,609 INFO L140 encePairwiseOnDemand]: 296/305 looper letters, 79 selfloop transitions, 16 changer transitions 14/118 dead transitions. [2023-11-19 07:43:46,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 118 transitions, 736 flow [2023-11-19 07:43:46,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:43:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:43:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1189 transitions. [2023-11-19 07:43:46,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331511839708561 [2023-11-19 07:43:46,616 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1189 transitions. [2023-11-19 07:43:46,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1189 transitions. [2023-11-19 07:43:46,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:46,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1189 transitions. [2023-11-19 07:43:46,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:46,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 305.0) internal successors, (3050), 10 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:46,628 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 305.0) internal successors, (3050), 10 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:46,628 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 315 flow. Second operand 9 states and 1189 transitions. [2023-11-19 07:43:46,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 118 transitions, 736 flow [2023-11-19 07:43:46,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 118 transitions, 736 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:43:46,638 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 417 flow [2023-11-19 07:43:46,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=417, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2023-11-19 07:43:46,640 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 41 predicate places. [2023-11-19 07:43:46,640 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 417 flow [2023-11-19 07:43:46,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 123.81818181818181) internal successors, (1362), 11 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:46,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:46,641 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:43:46,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:43:46,642 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:43:46,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:46,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1187704404, now seen corresponding path program 1 times [2023-11-19 07:43:46,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:46,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981765773] [2023-11-19 07:43:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:46,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:46,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:46,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981765773] [2023-11-19 07:43:46,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981765773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:43:46,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967168506] [2023-11-19 07:43:46,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:46,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:46,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:46,784 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:43:46,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:43:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:46,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:43:46,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:43:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:43:46,968 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:43:46,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967168506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:43:46,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:43:46,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-19 07:43:46,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876688038] [2023-11-19 07:43:46,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:43:46,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:43:46,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:46,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:43:46,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:43:47,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 305 [2023-11-19 07:43:47,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 417 flow. Second operand has 6 states, 6 states have (on average 136.83333333333334) internal successors, (821), 6 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:47,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:47,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 305 [2023-11-19 07:43:47,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:47,481 INFO L124 PetriNetUnfolderBase]: 1110/2059 cut-off events. [2023-11-19 07:43:47,481 INFO L125 PetriNetUnfolderBase]: For 2061/2061 co-relation queries the response was YES. [2023-11-19 07:43:47,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5937 conditions, 2059 events. 1110/2059 cut-off events. For 2061/2061 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 9860 event pairs, 421 based on Foata normal form. 34/2073 useless extension candidates. Maximal degree in co-relation 4731. Up to 781 conditions per place. [2023-11-19 07:43:47,502 INFO L140 encePairwiseOnDemand]: 297/305 looper letters, 99 selfloop transitions, 16 changer transitions 0/115 dead transitions. [2023-11-19 07:43:47,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 115 transitions, 847 flow [2023-11-19 07:43:47,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:43:47,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:43:47,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 882 transitions. [2023-11-19 07:43:47,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4819672131147541 [2023-11-19 07:43:47,506 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 882 transitions. [2023-11-19 07:43:47,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 882 transitions. [2023-11-19 07:43:47,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:47,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 882 transitions. [2023-11-19 07:43:47,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:47,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:47,515 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:47,516 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 417 flow. Second operand 6 states and 882 transitions. [2023-11-19 07:43:47,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 115 transitions, 847 flow [2023-11-19 07:43:47,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 820 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-19 07:43:47,529 INFO L231 Difference]: Finished difference. Result has 79 places, 69 transitions, 499 flow [2023-11-19 07:43:47,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=499, PETRI_PLACES=79, PETRI_TRANSITIONS=69} [2023-11-19 07:43:47,530 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 45 predicate places. [2023-11-19 07:43:47,530 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 499 flow [2023-11-19 07:43:47,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 136.83333333333334) internal successors, (821), 6 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:47,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:47,531 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-11-19 07:43:47,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:43:47,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:47,744 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:43:47,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:47,745 INFO L85 PathProgramCache]: Analyzing trace with hash -259020702, now seen corresponding path program 2 times [2023-11-19 07:43:47,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:47,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651152569] [2023-11-19 07:43:47,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:47,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:48,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:48,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651152569] [2023-11-19 07:43:48,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651152569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:43:48,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976039220] [2023-11-19 07:43:48,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:43:48,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:48,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:48,120 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:43:48,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:43:48,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:43:48,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:43:48,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:43:48,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:43:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:48,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:43:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:48,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976039220] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:43:48,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:43:48,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2023-11-19 07:43:48,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173463809] [2023-11-19 07:43:48,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:43:48,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:43:48,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:48,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:43:48,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:43:48,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 305 [2023-11-19 07:43:48,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 499 flow. Second operand has 20 states, 20 states have (on average 135.3) internal successors, (2706), 20 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:48,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:48,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 305 [2023-11-19 07:43:48,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:49,739 INFO L124 PetriNetUnfolderBase]: 1558/2883 cut-off events. [2023-11-19 07:43:49,739 INFO L125 PetriNetUnfolderBase]: For 4079/4079 co-relation queries the response was YES. [2023-11-19 07:43:49,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8718 conditions, 2883 events. 1558/2883 cut-off events. For 4079/4079 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 12989 event pairs, 344 based on Foata normal form. 32/2895 useless extension candidates. Maximal degree in co-relation 7739. Up to 936 conditions per place. [2023-11-19 07:43:49,770 INFO L140 encePairwiseOnDemand]: 297/305 looper letters, 214 selfloop transitions, 43 changer transitions 6/263 dead transitions. [2023-11-19 07:43:49,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 263 transitions, 1818 flow [2023-11-19 07:43:49,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:43:49,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-19 07:43:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3012 transitions. [2023-11-19 07:43:49,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702576112412178 [2023-11-19 07:43:49,782 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3012 transitions. [2023-11-19 07:43:49,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3012 transitions. [2023-11-19 07:43:49,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:49,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3012 transitions. [2023-11-19 07:43:49,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 143.42857142857142) internal successors, (3012), 21 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:49,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:49,808 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:49,809 INFO L175 Difference]: Start difference. First operand has 79 places, 69 transitions, 499 flow. Second operand 21 states and 3012 transitions. [2023-11-19 07:43:49,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 263 transitions, 1818 flow [2023-11-19 07:43:49,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 263 transitions, 1794 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-11-19 07:43:49,835 INFO L231 Difference]: Finished difference. Result has 110 places, 96 transitions, 866 flow [2023-11-19 07:43:49,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=866, PETRI_PLACES=110, PETRI_TRANSITIONS=96} [2023-11-19 07:43:49,837 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 76 predicate places. [2023-11-19 07:43:49,837 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 96 transitions, 866 flow [2023-11-19 07:43:49,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 135.3) internal successors, (2706), 20 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:49,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:49,839 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:43:49,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:43:50,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:50,052 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:43:50,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:50,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1589662127, now seen corresponding path program 3 times [2023-11-19 07:43:50,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:50,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562532542] [2023-11-19 07:43:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:50,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:43:51,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:51,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562532542] [2023-11-19 07:43:51,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562532542] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:43:51,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:43:51,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-19 07:43:51,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126327236] [2023-11-19 07:43:51,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:43:51,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:43:51,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:51,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:43:51,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:43:52,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 305 [2023-11-19 07:43:52,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 96 transitions, 866 flow. Second operand has 15 states, 15 states have (on average 114.86666666666666) internal successors, (1723), 15 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:52,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:52,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 305 [2023-11-19 07:43:52,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:55,493 INFO L124 PetriNetUnfolderBase]: 2453/4577 cut-off events. [2023-11-19 07:43:55,493 INFO L125 PetriNetUnfolderBase]: For 8407/8407 co-relation queries the response was YES. [2023-11-19 07:43:55,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15480 conditions, 4577 events. 2453/4577 cut-off events. For 8407/8407 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 23406 event pairs, 665 based on Foata normal form. 0/4552 useless extension candidates. Maximal degree in co-relation 14271. Up to 1275 conditions per place. [2023-11-19 07:43:55,555 INFO L140 encePairwiseOnDemand]: 287/305 looper letters, 118 selfloop transitions, 125 changer transitions 1/254 dead transitions. [2023-11-19 07:43:55,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 254 transitions, 2272 flow [2023-11-19 07:43:55,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:43:55,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-19 07:43:55,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2848 transitions. [2023-11-19 07:43:55,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38907103825136613 [2023-11-19 07:43:55,567 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2848 transitions. [2023-11-19 07:43:55,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2848 transitions. [2023-11-19 07:43:55,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:55,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2848 transitions. [2023-11-19 07:43:55,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 118.66666666666667) internal successors, (2848), 24 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:55,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 305.0) internal successors, (7625), 25 states have internal predecessors, (7625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:55,612 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 305.0) internal successors, (7625), 25 states have internal predecessors, (7625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:55,613 INFO L175 Difference]: Start difference. First operand has 110 places, 96 transitions, 866 flow. Second operand 24 states and 2848 transitions. [2023-11-19 07:43:55,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 254 transitions, 2272 flow [2023-11-19 07:43:55,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 254 transitions, 2046 flow, removed 80 selfloop flow, removed 9 redundant places. [2023-11-19 07:43:55,683 INFO L231 Difference]: Finished difference. Result has 131 places, 176 transitions, 1726 flow [2023-11-19 07:43:55,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1726, PETRI_PLACES=131, PETRI_TRANSITIONS=176} [2023-11-19 07:43:55,684 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 97 predicate places. [2023-11-19 07:43:55,685 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 176 transitions, 1726 flow [2023-11-19 07:43:55,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 114.86666666666666) internal successors, (1723), 15 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:55,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:55,686 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:43:55,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:43:55,691 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 07:43:55,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:55,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1490853661, now seen corresponding path program 4 times [2023-11-19 07:43:55,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:55,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949354575] [2023-11-19 07:43:55,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:55,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:43:56,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:56,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949354575] [2023-11-19 07:43:56,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949354575] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:43:56,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781207892] [2023-11-19 07:43:56,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:43:56,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:56,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:56,846 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:43:56,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a75f2f6a-48d2-4d91-b4f8-a0421277d35e/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:43:57,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:43:57,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:43:57,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-19 07:43:57,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:43:57,490 INFO L378 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 23 treesize of output 1 [2023-11-19 07:43:57,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:43:57,572 INFO L378 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 38 treesize of output 18 [2023-11-19 07:43:58,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2023-11-19 07:43:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:58,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:43:59,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2023-11-19 07:43:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:59,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781207892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:43:59,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:43:59,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 46 [2023-11-19 07:43:59,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179313363] [2023-11-19 07:43:59,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:43:59,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-19 07:43:59,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:59,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-19 07:43:59,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2106, Unknown=0, NotChecked=0, Total=2256 [2023-11-19 07:44:08,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 305 [2023-11-19 07:44:08,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 176 transitions, 1726 flow. Second operand has 48 states, 48 states have (on average 104.75) internal successors, (5028), 48 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:08,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:44:08,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 305 [2023-11-19 07:44:08,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand