./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue_ok_longest.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/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_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue_ok_longest.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/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_ed49bb22-dcd1-40b9-906a-15e504602fa7/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 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:44:55,308 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:44:55,419 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:44:55,424 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:44:55,425 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:44:55,480 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:44:55,481 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:44:55,482 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:44:55,484 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:44:55,486 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:44:55,487 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:44:55,487 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:44:55,488 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:44:55,489 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:44:55,490 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:44:55,490 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:44:55,491 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:44:55,491 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:44:55,492 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:44:55,493 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:44:55,493 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:44:55,494 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:44:55,495 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:44:55,495 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:44:55,496 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:44:55,496 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:44:55,497 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:44:55,497 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:44:55,498 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:44:55,498 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:44:55,499 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:44:55,499 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:44:55,500 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:44:55,500 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:44:55,500 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:44:55,501 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:44:55,501 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:44:55,501 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:44:55,502 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:44:55,502 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_ed49bb22-dcd1-40b9-906a-15e504602fa7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d [2023-11-19 07:44:55,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:44:55,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:44:55,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:44:55,852 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:44:55,853 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:44:55,854 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/queue_ok_longest.i [2023-11-19 07:44:59,167 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:44:59,622 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:44:59,622 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/sv-benchmarks/c/pthread/queue_ok_longest.i [2023-11-19 07:44:59,652 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/data/8b0a1162d/b364c0c2d91340969157ee818dadcc10/FLAGa8268e8b2 [2023-11-19 07:44:59,680 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/data/8b0a1162d/b364c0c2d91340969157ee818dadcc10 [2023-11-19 07:44:59,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:44:59,688 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:44:59,691 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:59,691 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:44:59,704 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:44:59,705 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:59" (1/1) ... [2023-11-19 07:44:59,710 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65c77672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:59, skipping insertion in model container [2023-11-19 07:44:59,711 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:59" (1/1) ... [2023-11-19 07:44:59,798 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:45:00,609 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_ed49bb22-dcd1-40b9-906a-15e504602fa7/sv-benchmarks/c/pthread/queue_ok_longest.i[43280,43293] [2023-11-19 07:45:00,618 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_ed49bb22-dcd1-40b9-906a-15e504602fa7/sv-benchmarks/c/pthread/queue_ok_longest.i[43553,43566] [2023-11-19 07:45:00,626 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:45:00,641 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:45:00,710 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_ed49bb22-dcd1-40b9-906a-15e504602fa7/sv-benchmarks/c/pthread/queue_ok_longest.i[43280,43293] [2023-11-19 07:45:00,714 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_ed49bb22-dcd1-40b9-906a-15e504602fa7/sv-benchmarks/c/pthread/queue_ok_longest.i[43553,43566] [2023-11-19 07:45:00,717 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:45:00,801 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:45:00,802 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:00 WrapperNode [2023-11-19 07:45:00,802 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:45:00,803 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:45:00,803 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:45:00,804 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:45:00,813 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:00" (1/1) ... [2023-11-19 07:45:00,856 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:00" (1/1) ... [2023-11-19 07:45:00,898 INFO L138 Inliner]: procedures = 274, calls = 57, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 202 [2023-11-19 07:45:00,898 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:45:00,899 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:45:00,900 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:45:00,900 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:45:00,912 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:00" (1/1) ... [2023-11-19 07:45:00,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:00" (1/1) ... [2023-11-19 07:45:00,920 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:00" (1/1) ... [2023-11-19 07:45:00,920 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:00" (1/1) ... [2023-11-19 07:45:00,941 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:00" (1/1) ... [2023-11-19 07:45:00,967 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:00" (1/1) ... [2023-11-19 07:45:00,971 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:00" (1/1) ... [2023-11-19 07:45:00,973 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:00" (1/1) ... [2023-11-19 07:45:00,995 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:45:00,996 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:45:00,996 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:45:00,996 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:45:00,997 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:00" (1/1) ... [2023-11-19 07:45:01,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:45:01,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:01,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:45:01,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:45:01,098 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-19 07:45:01,098 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-19 07:45:01,098 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-19 07:45:01,099 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-19 07:45:01,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:45:01,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:45:01,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:45:01,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:45:01,099 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:45:01,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:45:01,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:45:01,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:45:01,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:45:01,102 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 07:45:01,296 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:45:01,300 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:45:01,846 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:45:01,864 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:45:01,864 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:45:01,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:45:01 BoogieIcfgContainer [2023-11-19 07:45:01,871 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:45:01,875 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:45:01,875 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:45:01,880 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:45:01,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:44:59" (1/3) ... [2023-11-19 07:45:01,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db7e5f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:45:01, skipping insertion in model container [2023-11-19 07:45:01,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:00" (2/3) ... [2023-11-19 07:45:01,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db7e5f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:45:01, skipping insertion in model container [2023-11-19 07:45:01,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:45:01" (3/3) ... [2023-11-19 07:45:01,884 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longest.i [2023-11-19 07:45:01,895 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:45:01,910 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:45:01,910 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 07:45:01,910 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:45:02,134 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:45:02,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 226 transitions, 466 flow [2023-11-19 07:45:02,333 INFO L124 PetriNetUnfolderBase]: 13/224 cut-off events. [2023-11-19 07:45:02,334 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:45:02,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 224 events. 13/224 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 372 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 147. Up to 3 conditions per place. [2023-11-19 07:45:02,349 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 226 transitions, 466 flow [2023-11-19 07:45:02,367 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 214 transitions, 437 flow [2023-11-19 07:45:02,380 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:45:02,401 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 208 places, 214 transitions, 437 flow [2023-11-19 07:45:02,405 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 208 places, 214 transitions, 437 flow [2023-11-19 07:45:02,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 214 transitions, 437 flow [2023-11-19 07:45:02,476 INFO L124 PetriNetUnfolderBase]: 13/214 cut-off events. [2023-11-19 07:45:02,476 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:45:02,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 214 events. 13/214 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 304 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 147. Up to 3 conditions per place. [2023-11-19 07:45:02,488 INFO L119 LiptonReduction]: Number of co-enabled transitions 10812 [2023-11-19 07:45:11,694 INFO L134 LiptonReduction]: Checked pairs total: 20702 [2023-11-19 07:45:11,694 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-11-19 07:45:11,712 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:45:11,721 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;@36d9b36, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:45:11,722 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:45:11,724 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:45:11,724 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 07:45:11,724 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:45:11,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:11,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:45:11,726 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:45:11,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:11,734 INFO L85 PathProgramCache]: Analyzing trace with hash 881, now seen corresponding path program 1 times [2023-11-19 07:45:11,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:11,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908665878] [2023-11-19 07:45:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:11,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:11,905 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 07:45:11,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:11,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908665878] [2023-11-19 07:45:11,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908665878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:11,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:11,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:45:11,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530811274] [2023-11-19 07:45:11,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:11,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:45:11,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:11,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:45:11,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:45:11,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 428 [2023-11-19 07:45:11,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 103 flow. Second operand has 2 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:11,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:11,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 428 [2023-11-19 07:45:11,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:12,271 INFO L124 PetriNetUnfolderBase]: 902/1492 cut-off events. [2023-11-19 07:45:12,272 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-19 07:45:12,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2968 conditions, 1492 events. 902/1492 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6530 event pairs, 717 based on Foata normal form. 0/1224 useless extension candidates. Maximal degree in co-relation 2805. Up to 1425 conditions per place. [2023-11-19 07:45:12,294 INFO L140 encePairwiseOnDemand]: 427/428 looper letters, 41 selfloop transitions, 0 changer transitions 0/46 dead transitions. [2023-11-19 07:45:12,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 183 flow [2023-11-19 07:45:12,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:45:12,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:45:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 472 transitions. [2023-11-19 07:45:12,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5514018691588785 [2023-11-19 07:45:12,335 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 472 transitions. [2023-11-19 07:45:12,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 472 transitions. [2023-11-19 07:45:12,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:12,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 472 transitions. [2023-11-19 07:45:12,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 236.0) internal successors, (472), 2 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:12,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 428.0) internal successors, (1284), 3 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:12,363 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 428.0) internal successors, (1284), 3 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:12,365 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 103 flow. Second operand 2 states and 472 transitions. [2023-11-19 07:45:12,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 183 flow [2023-11-19 07:45:12,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:45:12,374 INFO L231 Difference]: Finished difference. Result has 44 places, 46 transitions, 96 flow [2023-11-19 07:45:12,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=96, PETRI_PLACES=44, PETRI_TRANSITIONS=46} [2023-11-19 07:45:12,381 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2023-11-19 07:45:12,381 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 46 transitions, 96 flow [2023-11-19 07:45:12,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:12,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:12,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:12,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:45:12,384 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:45:12,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:12,385 INFO L85 PathProgramCache]: Analyzing trace with hash 832002985, now seen corresponding path program 1 times [2023-11-19 07:45:12,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:12,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695236133] [2023-11-19 07:45:12,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:12,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:12,874 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 07:45:12,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:12,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695236133] [2023-11-19 07:45:12,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695236133] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:12,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:12,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:45:12,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478878266] [2023-11-19 07:45:12,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:12,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:12,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:12,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:12,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:12,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 428 [2023-11-19 07:45:12,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 46 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:12,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:12,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 428 [2023-11-19 07:45:12,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:13,080 INFO L124 PetriNetUnfolderBase]: 319/612 cut-off events. [2023-11-19 07:45:13,080 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-19 07:45:13,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1226 conditions, 612 events. 319/612 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2681 event pairs, 223 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 1223. Up to 368 conditions per place. [2023-11-19 07:45:13,086 INFO L140 encePairwiseOnDemand]: 424/428 looper letters, 40 selfloop transitions, 2 changer transitions 11/55 dead transitions. [2023-11-19 07:45:13,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 219 flow [2023-11-19 07:45:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:45:13,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2023-11-19 07:45:13,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311526479750779 [2023-11-19 07:45:13,092 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2023-11-19 07:45:13,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2023-11-19 07:45:13,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:13,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2023-11-19 07:45:13,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:13,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:13,105 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:13,105 INFO L175 Difference]: Start difference. First operand has 44 places, 46 transitions, 96 flow. Second operand 3 states and 682 transitions. [2023-11-19 07:45:13,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 219 flow [2023-11-19 07:45:13,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 219 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:45:13,108 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 92 flow [2023-11-19 07:45:13,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-11-19 07:45:13,110 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-11-19 07:45:13,110 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 92 flow [2023-11-19 07:45:13,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:13,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:13,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:13,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:45:13,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:45:13,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:13,113 INFO L85 PathProgramCache]: Analyzing trace with hash -168236240, now seen corresponding path program 1 times [2023-11-19 07:45:13,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:13,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5119953] [2023-11-19 07:45:13,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:13,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:13,259 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 07:45:13,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:13,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5119953] [2023-11-19 07:45:13,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5119953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:13,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:13,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:45:13,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049442496] [2023-11-19 07:45:13,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:13,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:13,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:13,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:13,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:13,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 428 [2023-11-19 07:45:13,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:13,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:13,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 428 [2023-11-19 07:45:13,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:13,468 INFO L124 PetriNetUnfolderBase]: 243/476 cut-off events. [2023-11-19 07:45:13,468 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-19 07:45:13,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1007 conditions, 476 events. 243/476 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1635 event pairs, 147 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 1002. Up to 339 conditions per place. [2023-11-19 07:45:13,476 INFO L140 encePairwiseOnDemand]: 424/428 looper letters, 49 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-11-19 07:45:13,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 228 flow [2023-11-19 07:45:13,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:13,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:45:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 686 transitions. [2023-11-19 07:45:13,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342679127725857 [2023-11-19 07:45:13,481 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 686 transitions. [2023-11-19 07:45:13,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 686 transitions. [2023-11-19 07:45:13,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:13,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 686 transitions. [2023-11-19 07:45:13,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:13,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:13,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:13,493 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 92 flow. Second operand 3 states and 686 transitions. [2023-11-19 07:45:13,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 228 flow [2023-11-19 07:45:13,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:45:13,497 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 107 flow [2023-11-19 07:45:13,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-19 07:45:13,501 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2023-11-19 07:45:13,502 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 107 flow [2023-11-19 07:45:13,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:13,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:13,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:13,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:45:13,504 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:45:13,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:13,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1851483565, now seen corresponding path program 1 times [2023-11-19 07:45:13,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:13,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800014789] [2023-11-19 07:45:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:13,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:13,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:13,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800014789] [2023-11-19 07:45:13,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800014789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:13,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:13,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:45:13,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905739223] [2023-11-19 07:45:13,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:13,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:13,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:13,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:13,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:13,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 428 [2023-11-19 07:45:13,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:13,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:13,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 428 [2023-11-19 07:45:13,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:14,064 INFO L124 PetriNetUnfolderBase]: 175/362 cut-off events. [2023-11-19 07:45:14,065 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:45:14,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 362 events. 175/362 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1089 event pairs, 6 based on Foata normal form. 46/382 useless extension candidates. Maximal degree in co-relation 807. Up to 331 conditions per place. [2023-11-19 07:45:14,068 INFO L140 encePairwiseOnDemand]: 425/428 looper letters, 43 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-11-19 07:45:14,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 48 transitions, 214 flow [2023-11-19 07:45:14,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:14,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:45:14,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2023-11-19 07:45:14,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241433021806854 [2023-11-19 07:45:14,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2023-11-19 07:45:14,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2023-11-19 07:45:14,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:14,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2023-11-19 07:45:14,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:14,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:14,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:14,084 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 107 flow. Second operand 3 states and 673 transitions. [2023-11-19 07:45:14,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 48 transitions, 214 flow [2023-11-19 07:45:14,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 48 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:45:14,088 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 110 flow [2023-11-19 07:45:14,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-11-19 07:45:14,091 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2023-11-19 07:45:14,091 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 110 flow [2023-11-19 07:45:14,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:14,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:14,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:14,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:45:14,093 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:45:14,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:14,095 INFO L85 PathProgramCache]: Analyzing trace with hash 573764111, now seen corresponding path program 1 times [2023-11-19 07:45:14,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:14,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382068410] [2023-11-19 07:45:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:14,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:14,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:14,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382068410] [2023-11-19 07:45:14,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382068410] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:14,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468696656] [2023-11-19 07:45:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:14,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:14,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:14,231 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:14,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:45:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:14,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:45:14,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:14,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:14,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468696656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:14,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:45:14,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 07:45:14,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198469413] [2023-11-19 07:45:14,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:14,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:45:14,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:14,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:45:14,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:45:14,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 428 [2023-11-19 07:45:14,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 215.85714285714286) internal successors, (1511), 7 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:14,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:14,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 428 [2023-11-19 07:45:14,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:14,845 INFO L124 PetriNetUnfolderBase]: 243/514 cut-off events. [2023-11-19 07:45:14,845 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 07:45:14,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 514 events. 243/514 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1368 event pairs, 85 based on Foata normal form. 12/492 useless extension candidates. Maximal degree in co-relation 1171. Up to 205 conditions per place. [2023-11-19 07:45:14,849 INFO L140 encePairwiseOnDemand]: 423/428 looper letters, 73 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2023-11-19 07:45:14,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 86 transitions, 380 flow [2023-11-19 07:45:14,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:45:14,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:45:14,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1346 transitions. [2023-11-19 07:45:14,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241433021806854 [2023-11-19 07:45:14,855 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1346 transitions. [2023-11-19 07:45:14,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1346 transitions. [2023-11-19 07:45:14,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:14,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1346 transitions. [2023-11-19 07:45:14,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 224.33333333333334) internal successors, (1346), 6 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:14,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 428.0) internal successors, (2996), 7 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:14,871 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 428.0) internal successors, (2996), 7 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:14,871 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 110 flow. Second operand 6 states and 1346 transitions. [2023-11-19 07:45:14,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 86 transitions, 380 flow [2023-11-19 07:45:14,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 86 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:45:14,875 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 170 flow [2023-11-19 07:45:14,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-11-19 07:45:14,876 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 6 predicate places. [2023-11-19 07:45:14,876 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 170 flow [2023-11-19 07:45:14,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 215.85714285714286) internal successors, (1511), 7 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:14,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:14,878 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:14,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:15,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:15,100 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:45:15,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:15,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1585663574, now seen corresponding path program 2 times [2023-11-19 07:45:15,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:15,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491255316] [2023-11-19 07:45:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:15,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:15,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:15,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491255316] [2023-11-19 07:45:15,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491255316] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:15,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770773179] [2023-11-19 07:45:15,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:45:15,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:15,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:15,401 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:15,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:45:15,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:45:15,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:45:15,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:45:15,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:15,805 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:15,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:15,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770773179] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:15,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:45:15,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-19 07:45:15,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761937135] [2023-11-19 07:45:15,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:15,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:45:15,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:15,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:45:15,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:45:16,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 428 [2023-11-19 07:45:16,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 170 flow. Second operand has 13 states, 13 states have (on average 216.46153846153845) internal successors, (2814), 13 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:16,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:16,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 428 [2023-11-19 07:45:16,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:16,613 INFO L124 PetriNetUnfolderBase]: 447/958 cut-off events. [2023-11-19 07:45:16,613 INFO L125 PetriNetUnfolderBase]: For 327/327 co-relation queries the response was YES. [2023-11-19 07:45:16,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2469 conditions, 958 events. 447/958 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 2553 event pairs, 85 based on Foata normal form. 24/924 useless extension candidates. Maximal degree in co-relation 2459. Up to 205 conditions per place. [2023-11-19 07:45:16,622 INFO L140 encePairwiseOnDemand]: 423/428 looper letters, 145 selfloop transitions, 22 changer transitions 0/170 dead transitions. [2023-11-19 07:45:16,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 170 transitions, 872 flow [2023-11-19 07:45:16,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:45:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:45:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2693 transitions. [2023-11-19 07:45:16,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5243380062305296 [2023-11-19 07:45:16,637 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2693 transitions. [2023-11-19 07:45:16,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2693 transitions. [2023-11-19 07:45:16,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:16,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2693 transitions. [2023-11-19 07:45:16,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 224.41666666666666) internal successors, (2693), 12 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:16,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 428.0) internal successors, (5564), 13 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:16,669 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 428.0) internal successors, (5564), 13 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:16,669 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 170 flow. Second operand 12 states and 2693 transitions. [2023-11-19 07:45:16,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 170 transitions, 872 flow [2023-11-19 07:45:16,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 170 transitions, 833 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-11-19 07:45:16,686 INFO L231 Difference]: Finished difference. Result has 70 places, 60 transitions, 320 flow [2023-11-19 07:45:16,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=320, PETRI_PLACES=70, PETRI_TRANSITIONS=60} [2023-11-19 07:45:16,690 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 23 predicate places. [2023-11-19 07:45:16,691 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 60 transitions, 320 flow [2023-11-19 07:45:16,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 216.46153846153845) internal successors, (2814), 13 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:16,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:16,694 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:16,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:16,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:45:16,908 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:45:16,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:16,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2005191414, now seen corresponding path program 3 times [2023-11-19 07:45:16,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:16,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017716192] [2023-11-19 07:45:16,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:16,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:17,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:17,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017716192] [2023-11-19 07:45:17,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017716192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:17,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946440285] [2023-11-19 07:45:17,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:45:17,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:17,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:17,716 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:17,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:45:18,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 07:45:18,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:45:18,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 07:45:18,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:18,978 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 19 treesize of output 1 [2023-11-19 07:45:19,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:45:19,022 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 18 treesize of output 13 [2023-11-19 07:45:19,129 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-19 07:45:19,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 16 [2023-11-19 07:45:19,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-19 07:45:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 76 proven. 45 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-19 07:45:19,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:19,411 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_468 (Array Int Int)) (|v_t1Thread1of1ForFork1_enqueue_#t~mem36#1_49| Int) (v_ArrVal_469 Int)) (let ((.cse0 (select (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_468) |c_~#queue~0.base|)) (.cse1 (+ |c_~#queue~0.offset| 3204))) (or (< (select .cse0 .cse1) |v_t1Thread1of1ForFork1_enqueue_#t~mem36#1_49|) (< (select (store .cse0 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork1_enqueue_#t~mem36#1_49| 4)) v_ArrVal_469) .cse1) 800)))) is different from false [2023-11-19 07:45:19,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:45:19,462 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 42 [2023-11-19 07:45:19,477 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:45:19,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 76 [2023-11-19 07:45:19,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2023-11-19 07:45:19,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-19 07:45:19,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:45:19,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 47 [2023-11-19 07:45:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 68 proven. 45 refuted. 0 times theorem prover too weak. 204 trivial. 8 not checked. [2023-11-19 07:45:19,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946440285] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:19,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:45:19,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 25 [2023-11-19 07:45:19,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082515064] [2023-11-19 07:45:19,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:19,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 07:45:19,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:19,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 07:45:19,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=438, Unknown=1, NotChecked=44, Total=600 [2023-11-19 07:45:20,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 428 [2023-11-19 07:45:20,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 60 transitions, 320 flow. Second operand has 25 states, 25 states have (on average 165.6) internal successors, (4140), 25 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:20,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:20,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 428 [2023-11-19 07:45:20,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:23,936 INFO L124 PetriNetUnfolderBase]: 821/1794 cut-off events. [2023-11-19 07:45:23,936 INFO L125 PetriNetUnfolderBase]: For 1426/1428 co-relation queries the response was YES. [2023-11-19 07:45:23,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4849 conditions, 1794 events. 821/1794 cut-off events. For 1426/1428 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 6402 event pairs, 69 based on Foata normal form. 9/1731 useless extension candidates. Maximal degree in co-relation 4832. Up to 255 conditions per place. [2023-11-19 07:45:23,955 INFO L140 encePairwiseOnDemand]: 416/428 looper letters, 308 selfloop transitions, 131 changer transitions 0/441 dead transitions. [2023-11-19 07:45:23,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 441 transitions, 2325 flow [2023-11-19 07:45:23,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-19 07:45:23,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-11-19 07:45:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 10373 transitions. [2023-11-19 07:45:24,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090292432921314 [2023-11-19 07:45:24,011 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 10373 transitions. [2023-11-19 07:45:24,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 10373 transitions. [2023-11-19 07:45:24,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:24,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 10373 transitions. [2023-11-19 07:45:24,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 167.30645161290323) internal successors, (10373), 62 states have internal predecessors, (10373), 0 states have call successors, (0), 0 states 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 07:45:24,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 428.0) internal successors, (26964), 63 states have internal predecessors, (26964), 0 states have call successors, (0), 0 states 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 07:45:24,215 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 428.0) internal successors, (26964), 63 states have internal predecessors, (26964), 0 states have call successors, (0), 0 states 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 07:45:24,224 INFO L175 Difference]: Start difference. First operand has 70 places, 60 transitions, 320 flow. Second operand 62 states and 10373 transitions. [2023-11-19 07:45:24,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 441 transitions, 2325 flow [2023-11-19 07:45:24,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 441 transitions, 2310 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:45:24,260 INFO L231 Difference]: Finished difference. Result has 155 places, 189 transitions, 1266 flow [2023-11-19 07:45:24,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=1266, PETRI_PLACES=155, PETRI_TRANSITIONS=189} [2023-11-19 07:45:24,261 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 108 predicate places. [2023-11-19 07:45:24,261 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 189 transitions, 1266 flow [2023-11-19 07:45:24,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 165.6) internal successors, (4140), 25 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:45:24,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:24,264 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:24,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:24,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:45:24,487 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:45:24,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:24,488 INFO L85 PathProgramCache]: Analyzing trace with hash 697944952, now seen corresponding path program 1 times [2023-11-19 07:45:24,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:24,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139718618] [2023-11-19 07:45:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:24,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:25,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:25,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139718618] [2023-11-19 07:45:25,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139718618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:25,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950512604] [2023-11-19 07:45:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:25,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:25,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:25,116 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:25,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:45:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:25,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:45:25,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:25,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:26,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950512604] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:26,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:45:26,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-11-19 07:45:26,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787838873] [2023-11-19 07:45:26,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:26,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-19 07:45:26,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:26,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-19 07:45:26,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-11-19 07:45:26,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 428 [2023-11-19 07:45:26,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 189 transitions, 1266 flow. Second operand has 27 states, 27 states have (on average 217.07407407407408) internal successors, (5861), 27 states have internal predecessors, (5861), 0 states have call successors, (0), 0 states 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 07:45:26,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:26,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 428 [2023-11-19 07:45:26,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:28,395 INFO L124 PetriNetUnfolderBase]: 1499/3338 cut-off events. [2023-11-19 07:45:28,395 INFO L125 PetriNetUnfolderBase]: For 26394/26394 co-relation queries the response was YES. [2023-11-19 07:45:28,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14331 conditions, 3338 events. 1499/3338 cut-off events. For 26394/26394 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 11680 event pairs, 124 based on Foata normal form. 104/3418 useless extension candidates. Maximal degree in co-relation 14286. Up to 469 conditions per place. [2023-11-19 07:45:28,446 INFO L140 encePairwiseOnDemand]: 423/428 looper letters, 480 selfloop transitions, 75 changer transitions 0/558 dead transitions. [2023-11-19 07:45:28,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 558 transitions, 5745 flow [2023-11-19 07:45:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-19 07:45:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-19 07:45:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 5836 transitions. [2023-11-19 07:45:28,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244428468727534 [2023-11-19 07:45:28,467 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 5836 transitions. [2023-11-19 07:45:28,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 5836 transitions. [2023-11-19 07:45:28,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:28,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 5836 transitions. [2023-11-19 07:45:28,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 224.46153846153845) internal successors, (5836), 26 states have internal predecessors, (5836), 0 states have call successors, (0), 0 states 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 07:45:28,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 428.0) internal successors, (11556), 27 states have internal predecessors, (11556), 0 states have call successors, (0), 0 states 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 07:45:28,513 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 428.0) internal successors, (11556), 27 states have internal predecessors, (11556), 0 states have call successors, (0), 0 states 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 07:45:28,514 INFO L175 Difference]: Start difference. First operand has 155 places, 189 transitions, 1266 flow. Second operand 26 states and 5836 transitions. [2023-11-19 07:45:28,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 558 transitions, 5745 flow [2023-11-19 07:45:28,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 558 transitions, 5469 flow, removed 20 selfloop flow, removed 12 redundant places. [2023-11-19 07:45:28,625 INFO L231 Difference]: Finished difference. Result has 182 places, 227 transitions, 1763 flow [2023-11-19 07:45:28,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1763, PETRI_PLACES=182, PETRI_TRANSITIONS=227} [2023-11-19 07:45:28,626 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 135 predicate places. [2023-11-19 07:45:28,627 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 227 transitions, 1763 flow [2023-11-19 07:45:28,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 217.07407407407408) internal successors, (5861), 27 states have internal predecessors, (5861), 0 states have call successors, (0), 0 states 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 07:45:28,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:28,629 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 24, 24, 24, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:28,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:28,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:28,854 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:45:28,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:28,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1917693770, now seen corresponding path program 2 times [2023-11-19 07:45:28,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:28,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915656775] [2023-11-19 07:45:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:28,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 1734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:31,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:31,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915656775] [2023-11-19 07:45:31,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915656775] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:45:31,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638339718] [2023-11-19 07:45:31,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:45:31,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:31,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:31,366 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:31,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:45:31,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:45:31,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:45:31,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 1327 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 07:45:31,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 1734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:32,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 1734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:45:33,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638339718] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:33,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:45:33,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-11-19 07:45:33,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869689916] [2023-11-19 07:45:33,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:33,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-19 07:45:33,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:33,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-19 07:45:33,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-11-19 07:45:34,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 428 [2023-11-19 07:45:34,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 227 transitions, 1763 flow. Second operand has 53 states, 53 states have (on average 217.35849056603774) internal successors, (11520), 53 states have internal predecessors, (11520), 0 states have call successors, (0), 0 states 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 07:45:34,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:45:34,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 428 [2023-11-19 07:45:34,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:45:39,499 INFO L124 PetriNetUnfolderBase]: 2981/6666 cut-off events. [2023-11-19 07:45:39,500 INFO L125 PetriNetUnfolderBase]: For 94584/94584 co-relation queries the response was YES. [2023-11-19 07:45:39,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30172 conditions, 6666 events. 2981/6666 cut-off events. For 94584/94584 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 23469 event pairs, 124 based on Foata normal form. 208/6850 useless extension candidates. Maximal degree in co-relation 30114. Up to 937 conditions per place. [2023-11-19 07:45:39,586 INFO L140 encePairwiseOnDemand]: 423/428 looper letters, 974 selfloop transitions, 153 changer transitions 0/1130 dead transitions. [2023-11-19 07:45:39,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 1130 transitions, 12206 flow [2023-11-19 07:45:39,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-19 07:45:39,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-19 07:45:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 11673 transitions. [2023-11-19 07:45:39,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244877785765636 [2023-11-19 07:45:39,604 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 11673 transitions. [2023-11-19 07:45:39,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 11673 transitions. [2023-11-19 07:45:39,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:45:39,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 11673 transitions. [2023-11-19 07:45:39,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 224.48076923076923) internal successors, (11673), 52 states have internal predecessors, (11673), 0 states have call successors, (0), 0 states 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 07:45:39,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 428.0) internal successors, (22684), 53 states have internal predecessors, (22684), 0 states have call successors, (0), 0 states 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 07:45:39,662 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 428.0) internal successors, (22684), 53 states have internal predecessors, (22684), 0 states have call successors, (0), 0 states 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 07:45:39,663 INFO L175 Difference]: Start difference. First operand has 182 places, 227 transitions, 1763 flow. Second operand 52 states and 11673 transitions. [2023-11-19 07:45:39,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 1130 transitions, 12206 flow [2023-11-19 07:45:40,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 1130 transitions, 12143 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-11-19 07:45:40,025 INFO L231 Difference]: Finished difference. Result has 249 places, 307 transitions, 3349 flow [2023-11-19 07:45:40,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=3349, PETRI_PLACES=249, PETRI_TRANSITIONS=307} [2023-11-19 07:45:40,027 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 202 predicate places. [2023-11-19 07:45:40,027 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 307 transitions, 3349 flow [2023-11-19 07:45:40,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 217.35849056603774) internal successors, (11520), 53 states have internal predecessors, (11520), 0 states have call successors, (0), 0 states 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 07:45:40,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:40,031 INFO L208 CegarLoopForPetriNet]: trace histogram [50, 50, 50, 50, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:40,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed49bb22-dcd1-40b9-906a-15e504602fa7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0