./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/fibonacci.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/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_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/fibonacci.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/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_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/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 115f061be4541a19227bc1624a8b38d08b679b43ee58fd41d4a05fa6a8fd007e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:58:22,336 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:58:22,460 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:58:22,466 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:58:22,468 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:58:22,507 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:58:22,509 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:58:22,510 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:58:22,512 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:58:22,517 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:58:22,519 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:58:22,519 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:58:22,520 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:58:22,522 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:58:22,522 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:58:22,523 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:58:22,523 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:58:22,524 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:58:22,524 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:58:22,525 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:58:22,525 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:58:22,526 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:58:22,527 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:58:22,527 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:58:22,528 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:58:22,529 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:58:22,529 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:58:22,530 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:58:22,530 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:58:22,531 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:58:22,532 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:58:22,533 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:58:22,533 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:58:22,533 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:58:22,534 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:58:22,534 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:58:22,534 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:58:22,534 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:58:22,535 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:58:22,535 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_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 115f061be4541a19227bc1624a8b38d08b679b43ee58fd41d4a05fa6a8fd007e [2023-11-19 07:58:22,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:58:22,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:58:22,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:58:22,845 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:58:22,846 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:58:22,847 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/fibonacci.wvr.c [2023-11-19 07:58:26,017 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:58:26,280 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:58:26,280 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/sv-benchmarks/c/weaver/fibonacci.wvr.c [2023-11-19 07:58:26,288 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/data/81ee04d73/ac1e829874514bb59cb298ccc78796f2/FLAG591eec0ef [2023-11-19 07:58:26,303 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/data/81ee04d73/ac1e829874514bb59cb298ccc78796f2 [2023-11-19 07:58:26,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:58:26,308 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:58:26,309 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:58:26,310 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:58:26,317 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:58:26,318 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:58:26" (1/1) ... [2023-11-19 07:58:26,319 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f845889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:26, skipping insertion in model container [2023-11-19 07:58:26,320 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:58:26" (1/1) ... [2023-11-19 07:58:26,349 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:58:26,589 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_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/sv-benchmarks/c/weaver/fibonacci.wvr.c[2356,2369] [2023-11-19 07:58:26,612 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:58:26,627 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:58:26,679 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_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/sv-benchmarks/c/weaver/fibonacci.wvr.c[2356,2369] [2023-11-19 07:58:26,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:58:26,704 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:58:26,704 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:26 WrapperNode [2023-11-19 07:58:26,705 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:58:26,707 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:58:26,707 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:58:26,707 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:58:26,716 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:26" (1/1) ... [2023-11-19 07:58:26,742 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:26" (1/1) ... [2023-11-19 07:58:26,787 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 172 [2023-11-19 07:58:26,788 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:58:26,789 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:58:26,790 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:58:26,790 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:58:26,801 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:26" (1/1) ... [2023-11-19 07:58:26,801 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:26" (1/1) ... [2023-11-19 07:58:26,815 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:26" (1/1) ... [2023-11-19 07:58:26,820 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:26" (1/1) ... [2023-11-19 07:58:26,827 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:26" (1/1) ... [2023-11-19 07:58:26,840 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:26" (1/1) ... [2023-11-19 07:58:26,842 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:26" (1/1) ... [2023-11-19 07:58:26,855 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:26" (1/1) ... [2023-11-19 07:58:26,858 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:58:26,859 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:58:26,859 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:58:26,859 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:58:26,860 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:26" (1/1) ... [2023-11-19 07:58:26,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:58:26,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:26,902 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:58:26,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:58:26,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:58:26,950 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:58:26,951 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:58:26,951 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:58:26,951 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:58:26,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:58:26,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:58:26,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:58:26,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:58:26,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:58:26,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:58:26,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:58:26,954 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 07:58:27,102 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:58:27,104 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:58:27,477 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:58:27,491 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:58:27,492 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:58:27,497 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:58:27 BoogieIcfgContainer [2023-11-19 07:58:27,512 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:58:27,515 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:58:27,516 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:58:27,519 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:58:27,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:58:26" (1/3) ... [2023-11-19 07:58:27,520 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32145c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:58:27, skipping insertion in model container [2023-11-19 07:58:27,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:26" (2/3) ... [2023-11-19 07:58:27,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32145c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:58:27, skipping insertion in model container [2023-11-19 07:58:27,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:58:27" (3/3) ... [2023-11-19 07:58:27,523 INFO L112 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2023-11-19 07:58:27,532 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:58:27,544 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:58:27,544 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:58:27,545 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:58:27,697 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:58:27,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 227 transitions, 468 flow [2023-11-19 07:58:27,896 INFO L124 PetriNetUnfolderBase]: 14/225 cut-off events. [2023-11-19 07:58:27,897 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:58:27,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 225 events. 14/225 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 346 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 147. Up to 2 conditions per place. [2023-11-19 07:58:27,906 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 227 transitions, 468 flow [2023-11-19 07:58:27,922 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 216 transitions, 444 flow [2023-11-19 07:58:27,926 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:58:27,949 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 216 transitions, 444 flow [2023-11-19 07:58:27,953 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 216 transitions, 444 flow [2023-11-19 07:58:27,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 216 transitions, 444 flow [2023-11-19 07:58:28,034 INFO L124 PetriNetUnfolderBase]: 14/216 cut-off events. [2023-11-19 07:58:28,034 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:58:28,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 216 events. 14/216 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 303 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 147. Up to 2 conditions per place. [2023-11-19 07:58:28,046 INFO L119 LiptonReduction]: Number of co-enabled transitions 11288 [2023-11-19 07:58:35,126 INFO L134 LiptonReduction]: Checked pairs total: 9537 [2023-11-19 07:58:35,126 INFO L136 LiptonReduction]: Total number of compositions: 251 [2023-11-19 07:58:35,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:58:35,151 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;@3fd4a4ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:58:35,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:58:35,156 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:58:35,156 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-19 07:58:35,157 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:58:35,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:35,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:35,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:35,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:35,165 INFO L85 PathProgramCache]: Analyzing trace with hash -53429661, now seen corresponding path program 1 times [2023-11-19 07:58:35,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:35,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919568875] [2023-11-19 07:58:35,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:35,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:35,967 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 07:58:35,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:35,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919568875] [2023-11-19 07:58:35,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919568875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:35,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:35,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:58:35,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124071227] [2023-11-19 07:58:35,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:35,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:58:35,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:36,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:58:36,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:58:36,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:58:36,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 5 states, 5 states have (on average 200.6) internal successors, (1003), 5 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states 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 07:58:36,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:36,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:58:36,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:36,298 INFO L124 PetriNetUnfolderBase]: 73/139 cut-off events. [2023-11-19 07:58:36,299 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-19 07:58:36,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 139 events. 73/139 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 386 event pairs, 15 based on Foata normal form. 1/108 useless extension candidates. Maximal degree in co-relation 222. Up to 79 conditions per place. [2023-11-19 07:58:36,301 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 28 selfloop transitions, 5 changer transitions 5/38 dead transitions. [2023-11-19 07:58:36,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 38 transitions, 182 flow [2023-11-19 07:58:36,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:58:36,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:58:36,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1029 transitions. [2023-11-19 07:58:36,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305439330543933 [2023-11-19 07:58:36,327 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1029 transitions. [2023-11-19 07:58:36,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1029 transitions. [2023-11-19 07:58:36,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:36,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1029 transitions. [2023-11-19 07:58:36,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 205.8) internal successors, (1029), 5 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states 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 07:58:36,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 07:58:36,374 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 07:58:36,376 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 5 states and 1029 transitions. [2023-11-19 07:58:36,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 38 transitions, 182 flow [2023-11-19 07:58:36,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 38 transitions, 162 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:58:36,383 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 68 flow [2023-11-19 07:58:36,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=68, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-11-19 07:58:36,389 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-11-19 07:58:36,390 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 68 flow [2023-11-19 07:58:36,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 200.6) internal successors, (1003), 5 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states 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 07:58:36,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:36,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:36,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:58:36,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:36,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:36,395 INFO L85 PathProgramCache]: Analyzing trace with hash 461995081, now seen corresponding path program 2 times [2023-11-19 07:58:36,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:36,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253784363] [2023-11-19 07:58:36,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:36,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:36,716 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 07:58:36,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:36,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253784363] [2023-11-19 07:58:36,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253784363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:36,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:36,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:58:36,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055583835] [2023-11-19 07:58:36,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:36,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:58:36,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:36,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:58:36,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:58:36,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:58:36,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 200.6) internal successors, (1003), 5 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states 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 07:58:36,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:36,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:58:36,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:36,935 INFO L124 PetriNetUnfolderBase]: 72/132 cut-off events. [2023-11-19 07:58:36,935 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-19 07:58:36,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 132 events. 72/132 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 355 event pairs, 15 based on Foata normal form. 1/125 useless extension candidates. Maximal degree in co-relation 355. Up to 79 conditions per place. [2023-11-19 07:58:36,937 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 26 selfloop transitions, 6 changer transitions 5/37 dead transitions. [2023-11-19 07:58:36,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 37 transitions, 192 flow [2023-11-19 07:58:36,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:58:36,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:58:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1027 transitions. [2023-11-19 07:58:36,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297071129707113 [2023-11-19 07:58:36,942 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1027 transitions. [2023-11-19 07:58:36,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1027 transitions. [2023-11-19 07:58:36,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:36,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1027 transitions. [2023-11-19 07:58:36,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 205.4) internal successors, (1027), 5 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states 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 07:58:36,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 07:58:36,956 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 07:58:36,956 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 68 flow. Second operand 5 states and 1027 transitions. [2023-11-19 07:58:36,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 37 transitions, 192 flow [2023-11-19 07:58:36,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 37 transitions, 190 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:58:36,959 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 100 flow [2023-11-19 07:58:36,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-11-19 07:58:36,960 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2023-11-19 07:58:36,960 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 100 flow [2023-11-19 07:58:36,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 200.6) internal successors, (1003), 5 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states 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 07:58:36,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:36,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:36,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:58:36,962 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:36,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:36,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1237420451, now seen corresponding path program 1 times [2023-11-19 07:58:36,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:36,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273903047] [2023-11-19 07:58:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:36,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:37,036 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 07:58:37,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:37,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273903047] [2023-11-19 07:58:37,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273903047] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:37,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124681724] [2023-11-19 07:58:37,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:37,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:37,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:37,044 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:37,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:58:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:37,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:58:37,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:37,238 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 07:58:37,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:37,274 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 07:58:37,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124681724] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:37,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:37,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-19 07:58:37,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478715076] [2023-11-19 07:58:37,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:37,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:58:37,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:37,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:58:37,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:58:37,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:58:37,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 100 flow. Second operand has 10 states, 10 states have (on average 200.6) internal successors, (2006), 10 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states 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 07:58:37,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:37,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:58:37,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:37,593 INFO L124 PetriNetUnfolderBase]: 109/184 cut-off events. [2023-11-19 07:58:37,593 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2023-11-19 07:58:37,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 184 events. 109/184 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 533 event pairs, 23 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 586. Up to 91 conditions per place. [2023-11-19 07:58:37,596 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 40 selfloop transitions, 23 changer transitions 0/63 dead transitions. [2023-11-19 07:58:37,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 63 transitions, 394 flow [2023-11-19 07:58:37,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:58:37,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:58:37,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2039 transitions. [2023-11-19 07:58:37,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265690376569038 [2023-11-19 07:58:37,604 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2039 transitions. [2023-11-19 07:58:37,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2039 transitions. [2023-11-19 07:58:37,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:37,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2039 transitions. [2023-11-19 07:58:37,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 203.9) internal successors, (2039), 10 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states 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 07:58:37,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 478.0) internal successors, (5258), 11 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states 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 07:58:37,628 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 478.0) internal successors, (5258), 11 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states 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 07:58:37,628 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 100 flow. Second operand 10 states and 2039 transitions. [2023-11-19 07:58:37,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 63 transitions, 394 flow [2023-11-19 07:58:37,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 63 transitions, 374 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-19 07:58:37,633 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 282 flow [2023-11-19 07:58:37,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=282, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2023-11-19 07:58:37,634 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-11-19 07:58:37,635 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 282 flow [2023-11-19 07:58:37,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 200.6) internal successors, (2006), 10 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states 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 07:58:37,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:37,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:37,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:37,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:37,852 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:37,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:37,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2094960453, now seen corresponding path program 2 times [2023-11-19 07:58:37,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:37,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239779076] [2023-11-19 07:58:37,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:37,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:37,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:37,922 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 07:58:37,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:37,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239779076] [2023-11-19 07:58:37,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239779076] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:37,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652568919] [2023-11-19 07:58:37,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:58:37,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:37,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:37,927 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:37,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:58:38,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:58:38,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:38,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:58:38,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:38,058 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 07:58:38,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:38,092 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 07:58:38,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652568919] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:38,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:38,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-19 07:58:38,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333783478] [2023-11-19 07:58:38,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:38,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:58:38,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:38,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:58:38,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:58:38,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:58:38,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 282 flow. Second operand has 8 states, 8 states have (on average 200.75) internal successors, (1606), 8 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states 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 07:58:38,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:38,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:58:38,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:38,337 INFO L124 PetriNetUnfolderBase]: 116/205 cut-off events. [2023-11-19 07:58:38,338 INFO L125 PetriNetUnfolderBase]: For 526/526 co-relation queries the response was YES. [2023-11-19 07:58:38,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 205 events. 116/205 cut-off events. For 526/526 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 645 event pairs, 18 based on Foata normal form. 4/209 useless extension candidates. Maximal degree in co-relation 644. Up to 71 conditions per place. [2023-11-19 07:58:38,341 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 48 selfloop transitions, 18 changer transitions 0/66 dead transitions. [2023-11-19 07:58:38,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 66 transitions, 532 flow [2023-11-19 07:58:38,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:58:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:58:38,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1435 transitions. [2023-11-19 07:58:38,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42887029288702927 [2023-11-19 07:58:38,348 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1435 transitions. [2023-11-19 07:58:38,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1435 transitions. [2023-11-19 07:58:38,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:38,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1435 transitions. [2023-11-19 07:58:38,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states 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 07:58:38,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:58:38,365 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:58:38,365 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 282 flow. Second operand 7 states and 1435 transitions. [2023-11-19 07:58:38,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 66 transitions, 532 flow [2023-11-19 07:58:38,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 486 flow, removed 23 selfloop flow, removed 0 redundant places. [2023-11-19 07:58:38,375 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 291 flow [2023-11-19 07:58:38,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=291, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-11-19 07:58:38,377 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2023-11-19 07:58:38,378 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 291 flow [2023-11-19 07:58:38,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 200.75) internal successors, (1606), 8 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states 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 07:58:38,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:38,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:38,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:38,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:38,604 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:38,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:38,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1439635721, now seen corresponding path program 1 times [2023-11-19 07:58:38,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:38,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003773275] [2023-11-19 07:58:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:38,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:38,678 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 07:58:38,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:38,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003773275] [2023-11-19 07:58:38,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003773275] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:38,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:38,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:58:38,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502605530] [2023-11-19 07:58:38,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:38,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:58:38,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:38,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:58:38,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:58:38,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 478 [2023-11-19 07:58:38,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 291 flow. Second operand has 5 states, 5 states have (on average 202.8) internal successors, (1014), 5 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states 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 07:58:38,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:38,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 478 [2023-11-19 07:58:38,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:38,827 INFO L124 PetriNetUnfolderBase]: 115/208 cut-off events. [2023-11-19 07:58:38,827 INFO L125 PetriNetUnfolderBase]: For 731/731 co-relation queries the response was YES. [2023-11-19 07:58:38,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 932 conditions, 208 events. 115/208 cut-off events. For 731/731 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 676 event pairs, 30 based on Foata normal form. 4/212 useless extension candidates. Maximal degree in co-relation 686. Up to 128 conditions per place. [2023-11-19 07:58:38,830 INFO L140 encePairwiseOnDemand]: 473/478 looper letters, 47 selfloop transitions, 8 changer transitions 6/61 dead transitions. [2023-11-19 07:58:38,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 509 flow [2023-11-19 07:58:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:58:38,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:58:38,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1037 transitions. [2023-11-19 07:58:38,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43389121338912134 [2023-11-19 07:58:38,835 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1037 transitions. [2023-11-19 07:58:38,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1037 transitions. [2023-11-19 07:58:38,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:38,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1037 transitions. [2023-11-19 07:58:38,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.4) internal successors, (1037), 5 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states 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 07:58:38,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 07:58:38,845 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 07:58:38,845 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 291 flow. Second operand 5 states and 1037 transitions. [2023-11-19 07:58:38,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 509 flow [2023-11-19 07:58:38,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 471 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-11-19 07:58:38,887 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 280 flow [2023-11-19 07:58:38,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=280, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-11-19 07:58:38,889 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-11-19 07:58:38,890 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 280 flow [2023-11-19 07:58:38,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 202.8) internal successors, (1014), 5 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states 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 07:58:38,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:38,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:38,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:58:38,891 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:38,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:38,891 INFO L85 PathProgramCache]: Analyzing trace with hash 789038553, now seen corresponding path program 2 times [2023-11-19 07:58:38,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:38,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406053905] [2023-11-19 07:58:38,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:38,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:38,987 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 07:58:38,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:38,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406053905] [2023-11-19 07:58:38,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406053905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:38,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:38,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:58:38,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473607935] [2023-11-19 07:58:38,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:38,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:58:38,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:38,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:58:38,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:58:39,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 478 [2023-11-19 07:58:39,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 280 flow. Second operand has 5 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states 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 07:58:39,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:39,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 478 [2023-11-19 07:58:39,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:39,122 INFO L124 PetriNetUnfolderBase]: 125/224 cut-off events. [2023-11-19 07:58:39,123 INFO L125 PetriNetUnfolderBase]: For 857/857 co-relation queries the response was YES. [2023-11-19 07:58:39,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 993 conditions, 224 events. 125/224 cut-off events. For 857/857 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 713 event pairs, 30 based on Foata normal form. 4/228 useless extension candidates. Maximal degree in co-relation 950. Up to 164 conditions per place. [2023-11-19 07:58:39,125 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 32 selfloop transitions, 22 changer transitions 5/59 dead transitions. [2023-11-19 07:58:39,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 506 flow [2023-11-19 07:58:39,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:58:39,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:58:39,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1027 transitions. [2023-11-19 07:58:39,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297071129707113 [2023-11-19 07:58:39,130 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1027 transitions. [2023-11-19 07:58:39,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1027 transitions. [2023-11-19 07:58:39,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:39,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1027 transitions. [2023-11-19 07:58:39,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 205.4) internal successors, (1027), 5 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states 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 07:58:39,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 07:58:39,140 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 07:58:39,140 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 280 flow. Second operand 5 states and 1027 transitions. [2023-11-19 07:58:39,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 506 flow [2023-11-19 07:58:39,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 486 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-19 07:58:39,147 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 390 flow [2023-11-19 07:58:39,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=390, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2023-11-19 07:58:39,148 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-11-19 07:58:39,148 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 390 flow [2023-11-19 07:58:39,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states 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 07:58:39,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:39,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:39,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:58:39,150 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:39,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:39,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1397046899, now seen corresponding path program 3 times [2023-11-19 07:58:39,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:39,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162288682] [2023-11-19 07:58:39,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:39,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:39,206 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 07:58:39,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:39,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162288682] [2023-11-19 07:58:39,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162288682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:39,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:39,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:58:39,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629840747] [2023-11-19 07:58:39,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:39,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:58:39,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:39,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:58:39,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:58:39,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 478 [2023-11-19 07:58:39,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 390 flow. Second operand has 5 states, 5 states have (on average 202.8) internal successors, (1014), 5 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states 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 07:58:39,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:39,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 478 [2023-11-19 07:58:39,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:39,329 INFO L124 PetriNetUnfolderBase]: 122/221 cut-off events. [2023-11-19 07:58:39,329 INFO L125 PetriNetUnfolderBase]: For 960/960 co-relation queries the response was YES. [2023-11-19 07:58:39,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1081 conditions, 221 events. 122/221 cut-off events. For 960/960 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 696 event pairs, 29 based on Foata normal form. 2/223 useless extension candidates. Maximal degree in co-relation 969. Up to 137 conditions per place. [2023-11-19 07:58:39,332 INFO L140 encePairwiseOnDemand]: 473/478 looper letters, 40 selfloop transitions, 19 changer transitions 3/62 dead transitions. [2023-11-19 07:58:39,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 62 transitions, 570 flow [2023-11-19 07:58:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:58:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:58:39,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1033 transitions. [2023-11-19 07:58:39,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4322175732217573 [2023-11-19 07:58:39,337 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1033 transitions. [2023-11-19 07:58:39,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1033 transitions. [2023-11-19 07:58:39,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:39,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1033 transitions. [2023-11-19 07:58:39,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 206.6) internal successors, (1033), 5 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states 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 07:58:39,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 07:58:39,348 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 07:58:39,348 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 390 flow. Second operand 5 states and 1033 transitions. [2023-11-19 07:58:39,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 62 transitions, 570 flow [2023-11-19 07:58:39,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 516 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-11-19 07:58:39,357 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 370 flow [2023-11-19 07:58:39,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=370, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-11-19 07:58:39,358 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 34 predicate places. [2023-11-19 07:58:39,358 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 370 flow [2023-11-19 07:58:39,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 202.8) internal successors, (1014), 5 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states 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 07:58:39,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:39,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:39,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:58:39,360 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:39,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:39,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1582164463, now seen corresponding path program 3 times [2023-11-19 07:58:39,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:39,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143443282] [2023-11-19 07:58:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:39,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:39,436 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 07:58:39,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:39,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143443282] [2023-11-19 07:58:39,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143443282] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:39,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993642186] [2023-11-19 07:58:39,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:58:39,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:39,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:39,439 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:39,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:58:39,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:58:39,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:39,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:58:39,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:39,597 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 07:58:39,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:39,627 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 07:58:39,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993642186] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:39,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:39,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-19 07:58:39,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567222144] [2023-11-19 07:58:39,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:39,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:58:39,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:39,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:58:39,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:58:39,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:58:39,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 370 flow. Second operand has 8 states, 8 states have (on average 201.0) internal successors, (1608), 8 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states 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 07:58:39,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:39,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:58:39,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:39,842 INFO L124 PetriNetUnfolderBase]: 126/225 cut-off events. [2023-11-19 07:58:39,842 INFO L125 PetriNetUnfolderBase]: For 670/670 co-relation queries the response was YES. [2023-11-19 07:58:39,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1021 conditions, 225 events. 126/225 cut-off events. For 670/670 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 701 event pairs, 12 based on Foata normal form. 4/229 useless extension candidates. Maximal degree in co-relation 959. Up to 79 conditions per place. [2023-11-19 07:58:39,846 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 49 selfloop transitions, 25 changer transitions 0/74 dead transitions. [2023-11-19 07:58:39,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 645 flow [2023-11-19 07:58:39,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:58:39,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:58:39,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1431 transitions. [2023-11-19 07:58:39,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42767483562462644 [2023-11-19 07:58:39,853 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1431 transitions. [2023-11-19 07:58:39,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1431 transitions. [2023-11-19 07:58:39,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:39,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1431 transitions. [2023-11-19 07:58:39,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 204.42857142857142) internal successors, (1431), 7 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states 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 07:58:39,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:58:39,876 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:58:39,876 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 370 flow. Second operand 7 states and 1431 transitions. [2023-11-19 07:58:39,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 645 flow [2023-11-19 07:58:39,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 597 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-19 07:58:39,887 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 424 flow [2023-11-19 07:58:39,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=424, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2023-11-19 07:58:39,890 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-11-19 07:58:39,893 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 424 flow [2023-11-19 07:58:39,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 201.0) internal successors, (1608), 8 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states 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 07:58:39,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:39,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:39,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:40,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:58:40,116 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:40,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:40,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1039512931, now seen corresponding path program 4 times [2023-11-19 07:58:40,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:40,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370245784] [2023-11-19 07:58:40,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:40,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:40,191 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 07:58:40,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:40,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370245784] [2023-11-19 07:58:40,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370245784] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:40,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:40,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:58:40,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62946272] [2023-11-19 07:58:40,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:40,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:58:40,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:40,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:58:40,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:58:40,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 478 [2023-11-19 07:58:40,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 424 flow. Second operand has 5 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states 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 07:58:40,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:40,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 478 [2023-11-19 07:58:40,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:40,328 INFO L124 PetriNetUnfolderBase]: 125/226 cut-off events. [2023-11-19 07:58:40,328 INFO L125 PetriNetUnfolderBase]: For 763/763 co-relation queries the response was YES. [2023-11-19 07:58:40,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 226 events. 125/226 cut-off events. For 763/763 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 728 event pairs, 34 based on Foata normal form. 2/228 useless extension candidates. Maximal degree in co-relation 947. Up to 188 conditions per place. [2023-11-19 07:58:40,331 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 41 selfloop transitions, 15 changer transitions 2/58 dead transitions. [2023-11-19 07:58:40,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 58 transitions, 561 flow [2023-11-19 07:58:40,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:58:40,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:58:40,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1025 transitions. [2023-11-19 07:58:40,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42887029288702927 [2023-11-19 07:58:40,337 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1025 transitions. [2023-11-19 07:58:40,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1025 transitions. [2023-11-19 07:58:40,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:40,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1025 transitions. [2023-11-19 07:58:40,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states 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 07:58:40,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 07:58:40,349 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 07:58:40,349 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 424 flow. Second operand 5 states and 1025 transitions. [2023-11-19 07:58:40,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 58 transitions, 561 flow [2023-11-19 07:58:40,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 530 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 07:58:40,357 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 410 flow [2023-11-19 07:58:40,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=410, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2023-11-19 07:58:40,359 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2023-11-19 07:58:40,359 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 410 flow [2023-11-19 07:58:40,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states 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 07:58:40,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:40,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:40,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:58:40,369 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:40,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:40,370 INFO L85 PathProgramCache]: Analyzing trace with hash -56497167, now seen corresponding path program 4 times [2023-11-19 07:58:40,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:40,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594377244] [2023-11-19 07:58:40,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:40,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:40,435 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 07:58:40,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:40,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594377244] [2023-11-19 07:58:40,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594377244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:40,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:40,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:58:40,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505255710] [2023-11-19 07:58:40,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:40,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:58:40,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:40,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:58:40,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:58:40,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 478 [2023-11-19 07:58:40,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 410 flow. Second operand has 5 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states 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 07:58:40,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:40,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 478 [2023-11-19 07:58:40,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:40,605 INFO L124 PetriNetUnfolderBase]: 130/233 cut-off events. [2023-11-19 07:58:40,605 INFO L125 PetriNetUnfolderBase]: For 770/770 co-relation queries the response was YES. [2023-11-19 07:58:40,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 233 events. 130/233 cut-off events. For 770/770 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 744 event pairs, 40 based on Foata normal form. 4/237 useless extension candidates. Maximal degree in co-relation 969. Up to 192 conditions per place. [2023-11-19 07:58:40,609 INFO L140 encePairwiseOnDemand]: 473/478 looper letters, 44 selfloop transitions, 16 changer transitions 0/60 dead transitions. [2023-11-19 07:58:40,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 60 transitions, 578 flow [2023-11-19 07:58:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:58:40,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:58:40,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1027 transitions. [2023-11-19 07:58:40,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297071129707113 [2023-11-19 07:58:40,616 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1027 transitions. [2023-11-19 07:58:40,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1027 transitions. [2023-11-19 07:58:40,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:40,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1027 transitions. [2023-11-19 07:58:40,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 205.4) internal successors, (1027), 5 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states 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 07:58:40,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 07:58:40,628 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 07:58:40,628 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 410 flow. Second operand 5 states and 1027 transitions. [2023-11-19 07:58:40,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 60 transitions, 578 flow [2023-11-19 07:58:40,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 546 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:58:40,635 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 421 flow [2023-11-19 07:58:40,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=421, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2023-11-19 07:58:40,637 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2023-11-19 07:58:40,637 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 421 flow [2023-11-19 07:58:40,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states 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 07:58:40,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:40,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:40,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:58:40,638 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:40,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:40,639 INFO L85 PathProgramCache]: Analyzing trace with hash -657295333, now seen corresponding path program 5 times [2023-11-19 07:58:40,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:40,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142515642] [2023-11-19 07:58:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:40,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:40,720 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 07:58:40,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:40,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142515642] [2023-11-19 07:58:40,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142515642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:40,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:40,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:58:40,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329188859] [2023-11-19 07:58:40,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:40,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:58:40,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:40,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:58:40,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:58:40,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 478 [2023-11-19 07:58:40,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 421 flow. Second operand has 5 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states 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 07:58:40,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:40,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 478 [2023-11-19 07:58:40,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:40,880 INFO L124 PetriNetUnfolderBase]: 126/229 cut-off events. [2023-11-19 07:58:40,880 INFO L125 PetriNetUnfolderBase]: For 753/753 co-relation queries the response was YES. [2023-11-19 07:58:40,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 229 events. 126/229 cut-off events. For 753/753 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 739 event pairs, 37 based on Foata normal form. 4/233 useless extension candidates. Maximal degree in co-relation 943. Up to 183 conditions per place. [2023-11-19 07:58:40,884 INFO L140 encePairwiseOnDemand]: 473/478 looper letters, 40 selfloop transitions, 15 changer transitions 4/59 dead transitions. [2023-11-19 07:58:40,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 558 flow [2023-11-19 07:58:40,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:58:40,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:58:40,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1026 transitions. [2023-11-19 07:58:40,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292887029288703 [2023-11-19 07:58:40,889 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1026 transitions. [2023-11-19 07:58:40,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1026 transitions. [2023-11-19 07:58:40,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:40,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1026 transitions. [2023-11-19 07:58:40,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 07:58:40,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 07:58:40,900 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 07:58:40,900 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 421 flow. Second operand 5 states and 1026 transitions. [2023-11-19 07:58:40,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 558 flow [2023-11-19 07:58:40,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 534 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-19 07:58:40,906 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 411 flow [2023-11-19 07:58:40,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=411, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2023-11-19 07:58:40,907 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2023-11-19 07:58:40,907 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 411 flow [2023-11-19 07:58:40,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states 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 07:58:40,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:40,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:40,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:58:40,909 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:40,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:40,909 INFO L85 PathProgramCache]: Analyzing trace with hash -886511189, now seen corresponding path program 5 times [2023-11-19 07:58:40,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:40,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917675247] [2023-11-19 07:58:40,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:40,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:40,996 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 07:58:40,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:40,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917675247] [2023-11-19 07:58:40,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917675247] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:40,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811118875] [2023-11-19 07:58:40,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:58:40,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:40,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:40,999 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:41,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:58:41,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:58:41,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:41,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:58:41,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:41,128 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 07:58:41,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:41,162 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 07:58:41,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811118875] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:41,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:41,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-19 07:58:41,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054909321] [2023-11-19 07:58:41,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:41,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:58:41,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:41,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:58:41,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:58:41,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:58:41,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 411 flow. Second operand has 10 states, 10 states have (on average 200.4) internal successors, (2004), 10 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states 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 07:58:41,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:41,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:58:41,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:41,375 INFO L124 PetriNetUnfolderBase]: 119/218 cut-off events. [2023-11-19 07:58:41,375 INFO L125 PetriNetUnfolderBase]: For 828/828 co-relation queries the response was YES. [2023-11-19 07:58:41,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1007 conditions, 218 events. 119/218 cut-off events. For 828/828 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 689 event pairs, 34 based on Foata normal form. 6/224 useless extension candidates. Maximal degree in co-relation 951. Up to 168 conditions per place. [2023-11-19 07:58:41,379 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 41 selfloop transitions, 19 changer transitions 0/60 dead transitions. [2023-11-19 07:58:41,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 60 transitions, 553 flow [2023-11-19 07:58:41,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:58:41,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:58:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1224 transitions. [2023-11-19 07:58:41,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42677824267782427 [2023-11-19 07:58:41,385 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1224 transitions. [2023-11-19 07:58:41,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1224 transitions. [2023-11-19 07:58:41,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:41,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1224 transitions. [2023-11-19 07:58:41,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 07:58:41,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states 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 07:58:41,397 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states 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 07:58:41,397 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 411 flow. Second operand 6 states and 1224 transitions. [2023-11-19 07:58:41,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 60 transitions, 553 flow [2023-11-19 07:58:41,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 60 transitions, 507 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-19 07:58:41,409 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 396 flow [2023-11-19 07:58:41,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=396, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-11-19 07:58:41,410 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 38 predicate places. [2023-11-19 07:58:41,410 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 396 flow [2023-11-19 07:58:41,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 200.4) internal successors, (2004), 10 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states 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 07:58:41,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:41,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:41,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:41,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:58:41,628 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:41,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:41,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1217155207, now seen corresponding path program 6 times [2023-11-19 07:58:41,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:41,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636094511] [2023-11-19 07:58:41,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:41,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:41,699 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 07:58:41,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:41,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636094511] [2023-11-19 07:58:41,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636094511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:41,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:41,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:58:41,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644694843] [2023-11-19 07:58:41,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:41,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:58:41,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:41,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:58:41,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:58:41,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 478 [2023-11-19 07:58:41,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 396 flow. Second operand has 5 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states 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 07:58:41,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:41,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 478 [2023-11-19 07:58:41,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:41,836 INFO L124 PetriNetUnfolderBase]: 115/206 cut-off events. [2023-11-19 07:58:41,836 INFO L125 PetriNetUnfolderBase]: For 630/630 co-relation queries the response was YES. [2023-11-19 07:58:41,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 972 conditions, 206 events. 115/206 cut-off events. For 630/630 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 626 event pairs, 31 based on Foata normal form. 2/208 useless extension candidates. Maximal degree in co-relation 812. Up to 153 conditions per place. [2023-11-19 07:58:41,839 INFO L140 encePairwiseOnDemand]: 473/478 looper letters, 36 selfloop transitions, 17 changer transitions 2/55 dead transitions. [2023-11-19 07:58:41,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 55 transitions, 518 flow [2023-11-19 07:58:41,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:58:41,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:58:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1023 transitions. [2023-11-19 07:58:41,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280334728033473 [2023-11-19 07:58:41,844 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1023 transitions. [2023-11-19 07:58:41,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1023 transitions. [2023-11-19 07:58:41,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:41,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1023 transitions. [2023-11-19 07:58:41,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 204.6) internal successors, (1023), 5 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states 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 07:58:41,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 07:58:41,854 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 07:58:41,855 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 396 flow. Second operand 5 states and 1023 transitions. [2023-11-19 07:58:41,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 55 transitions, 518 flow [2023-11-19 07:58:41,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 55 transitions, 467 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-19 07:58:41,860 INFO L231 Difference]: Finished difference. Result has 58 places, 48 transitions, 363 flow [2023-11-19 07:58:41,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=58, PETRI_TRANSITIONS=48} [2023-11-19 07:58:41,861 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 38 predicate places. [2023-11-19 07:58:41,861 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 48 transitions, 363 flow [2023-11-19 07:58:41,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states 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 07:58:41,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:41,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:41,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:58:41,862 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:41,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:41,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1931875331, now seen corresponding path program 6 times [2023-11-19 07:58:41,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:41,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236533477] [2023-11-19 07:58:41,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:41,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:41,926 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 07:58:41,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:41,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236533477] [2023-11-19 07:58:41,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236533477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:41,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78473114] [2023-11-19 07:58:41,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:58:41,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:41,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:41,928 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:41,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:58:42,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 07:58:42,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:42,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:58:42,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:42,092 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 07:58:42,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:42,120 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 07:58:42,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78473114] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:42,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:42,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-19 07:58:42,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973265146] [2023-11-19 07:58:42,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:42,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:58:42,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:42,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:58:42,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:58:42,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:58:42,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 48 transitions, 363 flow. Second operand has 10 states, 10 states have (on average 200.5) internal successors, (2005), 10 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states 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 07:58:42,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:42,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:58:42,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:42,351 INFO L124 PetriNetUnfolderBase]: 110/193 cut-off events. [2023-11-19 07:58:42,351 INFO L125 PetriNetUnfolderBase]: For 447/447 co-relation queries the response was YES. [2023-11-19 07:58:42,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 193 events. 110/193 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 570 event pairs, 14 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 784. Up to 68 conditions per place. [2023-11-19 07:58:42,354 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 43 selfloop transitions, 28 changer transitions 0/71 dead transitions. [2023-11-19 07:58:42,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 606 flow [2023-11-19 07:58:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:58:42,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:58:42,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2029 transitions. [2023-11-19 07:58:42,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42447698744769874 [2023-11-19 07:58:42,362 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2029 transitions. [2023-11-19 07:58:42,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2029 transitions. [2023-11-19 07:58:42,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:42,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2029 transitions. [2023-11-19 07:58:42,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 202.9) internal successors, (2029), 10 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states 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 07:58:42,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 478.0) internal successors, (5258), 11 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states 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 07:58:42,379 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 478.0) internal successors, (5258), 11 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states 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 07:58:42,379 INFO L175 Difference]: Start difference. First operand has 58 places, 48 transitions, 363 flow. Second operand 10 states and 2029 transitions. [2023-11-19 07:58:42,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 606 flow [2023-11-19 07:58:42,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 71 transitions, 565 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:58:42,384 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 423 flow [2023-11-19 07:58:42,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=423, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-11-19 07:58:42,385 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2023-11-19 07:58:42,385 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 423 flow [2023-11-19 07:58:42,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 200.5) internal successors, (2005), 10 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states 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 07:58:42,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:42,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:42,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:42,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:58:42,596 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:42,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:42,597 INFO L85 PathProgramCache]: Analyzing trace with hash -158939707, now seen corresponding path program 1 times [2023-11-19 07:58:42,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:42,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377270640] [2023-11-19 07:58:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:42,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:42,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:42,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377270640] [2023-11-19 07:58:42,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377270640] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:42,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523167929] [2023-11-19 07:58:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:42,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:42,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:42,794 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:42,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:58:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:42,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:58:42,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:43,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:43,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523167929] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:43,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:43,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-19 07:58:43,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901931159] [2023-11-19 07:58:43,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:43,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:58:43,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:43,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:58:43,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:58:43,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 478 [2023-11-19 07:58:43,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 423 flow. Second operand has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states 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 07:58:43,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:43,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 478 [2023-11-19 07:58:43,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:43,700 INFO L124 PetriNetUnfolderBase]: 161/291 cut-off events. [2023-11-19 07:58:43,700 INFO L125 PetriNetUnfolderBase]: For 701/701 co-relation queries the response was YES. [2023-11-19 07:58:43,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 291 events. 161/291 cut-off events. For 701/701 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1022 event pairs, 16 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 1262. Up to 185 conditions per place. [2023-11-19 07:58:43,704 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 69 selfloop transitions, 20 changer transitions 5/94 dead transitions. [2023-11-19 07:58:43,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 94 transitions, 824 flow [2023-11-19 07:58:43,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:58:43,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:58:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1394 transitions. [2023-11-19 07:58:43,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166168559473999 [2023-11-19 07:58:43,711 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1394 transitions. [2023-11-19 07:58:43,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1394 transitions. [2023-11-19 07:58:43,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:43,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1394 transitions. [2023-11-19 07:58:43,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 199.14285714285714) internal successors, (1394), 7 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:43,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:58:43,723 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:58:43,724 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 423 flow. Second operand 7 states and 1394 transitions. [2023-11-19 07:58:43,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 94 transitions, 824 flow [2023-11-19 07:58:43,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 94 transitions, 724 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-11-19 07:58:43,730 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 514 flow [2023-11-19 07:58:43,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=514, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2023-11-19 07:58:43,731 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 44 predicate places. [2023-11-19 07:58:43,732 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 514 flow [2023-11-19 07:58:43,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states 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 07:58:43,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:43,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:43,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-19 07:58:43,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:58:43,954 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:43,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:43,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1532222787, now seen corresponding path program 2 times [2023-11-19 07:58:43,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:43,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134859042] [2023-11-19 07:58:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:43,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:44,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:44,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134859042] [2023-11-19 07:58:44,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134859042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:44,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213282718] [2023-11-19 07:58:44,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:58:44,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:44,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:44,309 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:44,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:58:44,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:58:44,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:44,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:58:44,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:44,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:44,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213282718] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:44,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:44,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-19 07:58:44,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346162444] [2023-11-19 07:58:44,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:44,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:58:44,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:44,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:58:44,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:58:44,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 478 [2023-11-19 07:58:44,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 514 flow. Second operand has 12 states, 12 states have (on average 194.83333333333334) internal successors, (2338), 12 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states 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 07:58:44,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:44,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 478 [2023-11-19 07:58:44,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:45,271 INFO L124 PetriNetUnfolderBase]: 166/300 cut-off events. [2023-11-19 07:58:45,271 INFO L125 PetriNetUnfolderBase]: For 833/833 co-relation queries the response was YES. [2023-11-19 07:58:45,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1417 conditions, 300 events. 166/300 cut-off events. For 833/833 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1066 event pairs, 18 based on Foata normal form. 1/301 useless extension candidates. Maximal degree in co-relation 1391. Up to 213 conditions per place. [2023-11-19 07:58:45,275 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 67 selfloop transitions, 20 changer transitions 5/92 dead transitions. [2023-11-19 07:58:45,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 92 transitions, 815 flow [2023-11-19 07:58:45,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:58:45,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:58:45,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1390 transitions. [2023-11-19 07:58:45,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415421398684997 [2023-11-19 07:58:45,281 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1390 transitions. [2023-11-19 07:58:45,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1390 transitions. [2023-11-19 07:58:45,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:45,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1390 transitions. [2023-11-19 07:58:45,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.57142857142858) internal successors, (1390), 7 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states 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 07:58:45,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:58:45,293 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:58:45,294 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 514 flow. Second operand 7 states and 1390 transitions. [2023-11-19 07:58:45,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 92 transitions, 815 flow [2023-11-19 07:58:45,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 92 transitions, 751 flow, removed 25 selfloop flow, removed 3 redundant places. [2023-11-19 07:58:45,301 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 568 flow [2023-11-19 07:58:45,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=568, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2023-11-19 07:58:45,301 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 49 predicate places. [2023-11-19 07:58:45,302 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 568 flow [2023-11-19 07:58:45,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 194.83333333333334) internal successors, (2338), 12 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states 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 07:58:45,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:45,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:45,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:45,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 07:58:45,512 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:45,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:45,513 INFO L85 PathProgramCache]: Analyzing trace with hash 912967767, now seen corresponding path program 3 times [2023-11-19 07:58:45,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:45,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139498529] [2023-11-19 07:58:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:45,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:45,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:45,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139498529] [2023-11-19 07:58:45,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139498529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:45,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625025007] [2023-11-19 07:58:45,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:58:45,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:45,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:45,755 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:45,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:58:45,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:58:45,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:45,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:58:45,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:45,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:46,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625025007] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:46,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:46,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-19 07:58:46,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091596661] [2023-11-19 07:58:46,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:46,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:58:46,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:46,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:58:46,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:58:46,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 478 [2023-11-19 07:58:46,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 568 flow. Second operand has 14 states, 14 states have (on average 194.85714285714286) internal successors, (2728), 14 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states 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 07:58:46,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:46,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 478 [2023-11-19 07:58:46,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:46,782 INFO L124 PetriNetUnfolderBase]: 163/291 cut-off events. [2023-11-19 07:58:46,782 INFO L125 PetriNetUnfolderBase]: For 844/844 co-relation queries the response was YES. [2023-11-19 07:58:46,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1384 conditions, 291 events. 163/291 cut-off events. For 844/844 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1015 event pairs, 16 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 1359. Up to 189 conditions per place. [2023-11-19 07:58:46,786 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 67 selfloop transitions, 21 changer transitions 5/93 dead transitions. [2023-11-19 07:58:46,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 837 flow [2023-11-19 07:58:46,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:58:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:58:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1392 transitions. [2023-11-19 07:58:46,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41601912731619844 [2023-11-19 07:58:46,792 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1392 transitions. [2023-11-19 07:58:46,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1392 transitions. [2023-11-19 07:58:46,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:46,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1392 transitions. [2023-11-19 07:58:46,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.85714285714286) internal successors, (1392), 7 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states 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 07:58:46,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:58:46,803 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:58:46,804 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 568 flow. Second operand 7 states and 1392 transitions. [2023-11-19 07:58:46,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 837 flow [2023-11-19 07:58:46,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 801 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-19 07:58:46,811 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 605 flow [2023-11-19 07:58:46,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=605, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2023-11-19 07:58:46,812 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 53 predicate places. [2023-11-19 07:58:46,813 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 605 flow [2023-11-19 07:58:46,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 194.85714285714286) internal successors, (2728), 14 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states 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 07:58:46,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:46,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:46,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:47,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 07:58:47,028 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:47,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:47,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1395243685, now seen corresponding path program 4 times [2023-11-19 07:58:47,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:47,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340139946] [2023-11-19 07:58:47,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:47,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:47,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:47,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:47,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340139946] [2023-11-19 07:58:47,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340139946] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:47,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845268176] [2023-11-19 07:58:47,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:58:47,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:47,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:47,253 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:47,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:58:47,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:58:47,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:47,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:58:47,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:47,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:47,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845268176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:47,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:47,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-19 07:58:47,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523968502] [2023-11-19 07:58:47,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:47,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:58:47,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:47,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:58:47,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:58:47,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 478 [2023-11-19 07:58:47,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 605 flow. Second operand has 12 states, 12 states have (on average 195.16666666666666) internal successors, (2342), 12 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states 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 07:58:47,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:47,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 478 [2023-11-19 07:58:47,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:48,115 INFO L124 PetriNetUnfolderBase]: 186/332 cut-off events. [2023-11-19 07:58:48,115 INFO L125 PetriNetUnfolderBase]: For 1055/1055 co-relation queries the response was YES. [2023-11-19 07:58:48,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1592 conditions, 332 events. 186/332 cut-off events. For 1055/1055 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1214 event pairs, 16 based on Foata normal form. 1/333 useless extension candidates. Maximal degree in co-relation 1565. Up to 273 conditions per place. [2023-11-19 07:58:48,120 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 73 selfloop transitions, 20 changer transitions 5/98 dead transitions. [2023-11-19 07:58:48,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 944 flow [2023-11-19 07:58:48,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:58:48,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:58:48,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1382 transitions. [2023-11-19 07:58:48,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4130304841601913 [2023-11-19 07:58:48,124 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1382 transitions. [2023-11-19 07:58:48,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1382 transitions. [2023-11-19 07:58:48,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:48,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1382 transitions. [2023-11-19 07:58:48,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 197.42857142857142) internal successors, (1382), 7 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states 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 07:58:48,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:58:48,134 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:58:48,135 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 605 flow. Second operand 7 states and 1382 transitions. [2023-11-19 07:58:48,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 944 flow [2023-11-19 07:58:48,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 98 transitions, 899 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-19 07:58:48,144 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 739 flow [2023-11-19 07:58:48,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=739, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2023-11-19 07:58:48,145 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 58 predicate places. [2023-11-19 07:58:48,145 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 739 flow [2023-11-19 07:58:48,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.16666666666666) internal successors, (2342), 12 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states 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 07:58:48,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:48,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:48,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:48,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 07:58:48,367 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:48,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:48,368 INFO L85 PathProgramCache]: Analyzing trace with hash 556344387, now seen corresponding path program 5 times [2023-11-19 07:58:48,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:48,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117828965] [2023-11-19 07:58:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:48,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:48,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:48,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117828965] [2023-11-19 07:58:48,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117828965] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:48,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253376020] [2023-11-19 07:58:48,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:58:48,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:48,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:48,582 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:48,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:58:48,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 07:58:48,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:48,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:58:48,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:48,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:48,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253376020] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:48,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:48,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-19 07:58:48,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219274128] [2023-11-19 07:58:48,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:48,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:58:48,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:48,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:58:48,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:58:49,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 478 [2023-11-19 07:58:49,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 739 flow. Second operand has 13 states, 13 states have (on average 195.07692307692307) internal successors, (2536), 13 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states 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 07:58:49,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:49,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 478 [2023-11-19 07:58:49,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:49,499 INFO L124 PetriNetUnfolderBase]: 200/360 cut-off events. [2023-11-19 07:58:49,499 INFO L125 PetriNetUnfolderBase]: For 1274/1274 co-relation queries the response was YES. [2023-11-19 07:58:49,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1820 conditions, 360 events. 200/360 cut-off events. For 1274/1274 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1358 event pairs, 16 based on Foata normal form. 1/361 useless extension candidates. Maximal degree in co-relation 1787. Up to 277 conditions per place. [2023-11-19 07:58:49,505 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 81 selfloop transitions, 21 changer transitions 5/107 dead transitions. [2023-11-19 07:58:49,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 107 transitions, 1081 flow [2023-11-19 07:58:49,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:58:49,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:58:49,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1388 transitions. [2023-11-19 07:58:49,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41482367005379556 [2023-11-19 07:58:49,509 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1388 transitions. [2023-11-19 07:58:49,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1388 transitions. [2023-11-19 07:58:49,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:49,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1388 transitions. [2023-11-19 07:58:49,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.28571428571428) internal successors, (1388), 7 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states 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 07:58:49,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:58:49,517 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:58:49,517 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 739 flow. Second operand 7 states and 1388 transitions. [2023-11-19 07:58:49,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 107 transitions, 1081 flow [2023-11-19 07:58:49,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 107 transitions, 1042 flow, removed 16 selfloop flow, removed 2 redundant places. [2023-11-19 07:58:49,528 INFO L231 Difference]: Finished difference. Result has 84 places, 89 transitions, 814 flow [2023-11-19 07:58:49,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=814, PETRI_PLACES=84, PETRI_TRANSITIONS=89} [2023-11-19 07:58:49,529 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2023-11-19 07:58:49,529 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 89 transitions, 814 flow [2023-11-19 07:58:49,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 195.07692307692307) internal successors, (2536), 13 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states 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 07:58:49,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:49,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:49,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-19 07:58:49,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:49,752 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:49,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:49,752 INFO L85 PathProgramCache]: Analyzing trace with hash 528638757, now seen corresponding path program 6 times [2023-11-19 07:58:49,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:49,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067913338] [2023-11-19 07:58:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:49,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:49,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:49,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067913338] [2023-11-19 07:58:49,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067913338] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:49,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817757647] [2023-11-19 07:58:49,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:58:49,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:49,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:49,972 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:49,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:58:50,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 07:58:50,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:50,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:58:50,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:50,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:50,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817757647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:50,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:50,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-19 07:58:50,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597566490] [2023-11-19 07:58:50,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:50,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:58:50,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:50,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:58:50,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:58:50,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 478 [2023-11-19 07:58:50,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 89 transitions, 814 flow. Second operand has 14 states, 14 states have (on average 194.85714285714286) internal successors, (2728), 14 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states 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 07:58:50,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:50,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 478 [2023-11-19 07:58:50,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:50,923 INFO L124 PetriNetUnfolderBase]: 197/351 cut-off events. [2023-11-19 07:58:50,923 INFO L125 PetriNetUnfolderBase]: For 1489/1489 co-relation queries the response was YES. [2023-11-19 07:58:50,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1850 conditions, 351 events. 197/351 cut-off events. For 1489/1489 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1307 event pairs, 16 based on Foata normal form. 1/352 useless extension candidates. Maximal degree in co-relation 1817. Up to 277 conditions per place. [2023-11-19 07:58:50,929 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 79 selfloop transitions, 22 changer transitions 5/106 dead transitions. [2023-11-19 07:58:50,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 106 transitions, 1120 flow [2023-11-19 07:58:50,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:58:50,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:58:50,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1386 transitions. [2023-11-19 07:58:50,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41422594142259417 [2023-11-19 07:58:50,933 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1386 transitions. [2023-11-19 07:58:50,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1386 transitions. [2023-11-19 07:58:50,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:50,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1386 transitions. [2023-11-19 07:58:50,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states 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 07:58:50,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:58:50,945 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:58:50,945 INFO L175 Difference]: Start difference. First operand has 84 places, 89 transitions, 814 flow. Second operand 7 states and 1386 transitions. [2023-11-19 07:58:50,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 106 transitions, 1120 flow [2023-11-19 07:58:50,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 106 transitions, 1047 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-11-19 07:58:50,958 INFO L231 Difference]: Finished difference. Result has 88 places, 91 transitions, 839 flow [2023-11-19 07:58:50,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=839, PETRI_PLACES=88, PETRI_TRANSITIONS=91} [2023-11-19 07:58:50,959 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 68 predicate places. [2023-11-19 07:58:50,959 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 91 transitions, 839 flow [2023-11-19 07:58:50,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 194.85714285714286) internal successors, (2728), 14 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states 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 07:58:50,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:50,960 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:50,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:51,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:51,181 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:51,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:51,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1767238555, now seen corresponding path program 7 times [2023-11-19 07:58:51,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:51,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928406898] [2023-11-19 07:58:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:51,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:51,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:51,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928406898] [2023-11-19 07:58:51,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928406898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:51,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761010596] [2023-11-19 07:58:51,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:58:51,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:51,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:51,272 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:51,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:58:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:51,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:58:51,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:51,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:51,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761010596] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:51,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:51,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-19 07:58:51,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110344408] [2023-11-19 07:58:51,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:51,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:58:51,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:51,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:58:51,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:58:51,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:58:51,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 91 transitions, 839 flow. Second operand has 11 states, 11 states have (on average 200.54545454545453) internal successors, (2206), 11 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states 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 07:58:51,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:51,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:58:51,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:51,744 INFO L124 PetriNetUnfolderBase]: 214/385 cut-off events. [2023-11-19 07:58:51,744 INFO L125 PetriNetUnfolderBase]: For 1819/1819 co-relation queries the response was YES. [2023-11-19 07:58:51,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2033 conditions, 385 events. 214/385 cut-off events. For 1819/1819 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1532 event pairs, 31 based on Foata normal form. 4/389 useless extension candidates. Maximal degree in co-relation 1995. Up to 155 conditions per place. [2023-11-19 07:58:51,750 INFO L140 encePairwiseOnDemand]: 473/478 looper letters, 76 selfloop transitions, 34 changer transitions 11/121 dead transitions. [2023-11-19 07:58:51,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 121 transitions, 1276 flow [2023-11-19 07:58:51,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:58:51,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:58:51,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1434 transitions. [2023-11-19 07:58:51,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-11-19 07:58:51,755 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1434 transitions. [2023-11-19 07:58:51,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1434 transitions. [2023-11-19 07:58:51,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:51,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1434 transitions. [2023-11-19 07:58:51,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 204.85714285714286) internal successors, (1434), 7 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states 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 07:58:51,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:58:51,765 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:58:51,766 INFO L175 Difference]: Start difference. First operand has 88 places, 91 transitions, 839 flow. Second operand 7 states and 1434 transitions. [2023-11-19 07:58:51,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 121 transitions, 1276 flow [2023-11-19 07:58:51,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 121 transitions, 1217 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-11-19 07:58:51,779 INFO L231 Difference]: Finished difference. Result has 93 places, 92 transitions, 909 flow [2023-11-19 07:58:51,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=909, PETRI_PLACES=93, PETRI_TRANSITIONS=92} [2023-11-19 07:58:51,780 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 73 predicate places. [2023-11-19 07:58:51,780 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 92 transitions, 909 flow [2023-11-19 07:58:51,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 200.54545454545453) internal successors, (2206), 11 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states 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 07:58:51,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:51,781 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:51,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:51,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-19 07:58:51,994 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:51,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:51,995 INFO L85 PathProgramCache]: Analyzing trace with hash -64319361, now seen corresponding path program 8 times [2023-11-19 07:58:51,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:51,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46922701] [2023-11-19 07:58:51,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:51,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:52,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:52,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46922701] [2023-11-19 07:58:52,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46922701] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:52,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279870099] [2023-11-19 07:58:52,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:58:52,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:52,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:52,088 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:52,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:58:52,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:58:52,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:52,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:58:52,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:52,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:52,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279870099] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:52,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:52,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-19 07:58:52,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957322956] [2023-11-19 07:58:52,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:52,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:58:52,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:52,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:58:52,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:58:52,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:58:52,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 92 transitions, 909 flow. Second operand has 11 states, 11 states have (on average 200.1818181818182) internal successors, (2202), 11 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states 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 07:58:52,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:52,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:58:52,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:52,575 INFO L124 PetriNetUnfolderBase]: 221/390 cut-off events. [2023-11-19 07:58:52,575 INFO L125 PetriNetUnfolderBase]: For 2275/2275 co-relation queries the response was YES. [2023-11-19 07:58:52,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2166 conditions, 390 events. 221/390 cut-off events. For 2275/2275 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1514 event pairs, 19 based on Foata normal form. 6/396 useless extension candidates. Maximal degree in co-relation 2093. Up to 101 conditions per place. [2023-11-19 07:58:52,581 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 83 selfloop transitions, 49 changer transitions 0/132 dead transitions. [2023-11-19 07:58:52,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 132 transitions, 1429 flow [2023-11-19 07:58:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:58:52,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:58:52,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2044 transitions. [2023-11-19 07:58:52,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276150627615063 [2023-11-19 07:58:52,588 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2044 transitions. [2023-11-19 07:58:52,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2044 transitions. [2023-11-19 07:58:52,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:52,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2044 transitions. [2023-11-19 07:58:52,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 204.4) internal successors, (2044), 10 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states 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 07:58:52,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 478.0) internal successors, (5258), 11 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states 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 07:58:52,600 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 478.0) internal successors, (5258), 11 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states 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 07:58:52,600 INFO L175 Difference]: Start difference. First operand has 93 places, 92 transitions, 909 flow. Second operand 10 states and 2044 transitions. [2023-11-19 07:58:52,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 132 transitions, 1429 flow [2023-11-19 07:58:52,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 132 transitions, 1379 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-11-19 07:58:52,616 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 1071 flow [2023-11-19 07:58:52,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1071, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2023-11-19 07:58:52,617 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 80 predicate places. [2023-11-19 07:58:52,617 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 1071 flow [2023-11-19 07:58:52,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 200.1818181818182) internal successors, (2202), 11 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states 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 07:58:52,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:52,618 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:52,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:52,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-19 07:58:52,832 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:52,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:52,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1884401259, now seen corresponding path program 9 times [2023-11-19 07:58:52,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:52,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071068414] [2023-11-19 07:58:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:52,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:52,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:52,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071068414] [2023-11-19 07:58:52,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071068414] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:52,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146339653] [2023-11-19 07:58:52,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:58:52,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:52,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:52,915 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:52,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 07:58:53,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:58:53,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:53,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:58:53,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:53,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:53,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146339653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:53,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:53,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-19 07:58:53,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709498717] [2023-11-19 07:58:53,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:53,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:58:53,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:53,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:58:53,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:58:53,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:58:53,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 1071 flow. Second operand has 12 states, 12 states have (on average 200.0) internal successors, (2400), 12 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 07:58:53,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:53,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:58:53,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:53,565 INFO L124 PetriNetUnfolderBase]: 269/464 cut-off events. [2023-11-19 07:58:53,565 INFO L125 PetriNetUnfolderBase]: For 4200/4200 co-relation queries the response was YES. [2023-11-19 07:58:53,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2874 conditions, 464 events. 269/464 cut-off events. For 4200/4200 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1822 event pairs, 30 based on Foata normal form. 14/478 useless extension candidates. Maximal degree in co-relation 2795. Up to 178 conditions per place. [2023-11-19 07:58:53,573 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 78 selfloop transitions, 74 changer transitions 0/152 dead transitions. [2023-11-19 07:58:53,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 152 transitions, 1893 flow [2023-11-19 07:58:53,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:58:53,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 07:58:53,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3250 transitions. [2023-11-19 07:58:53,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249476987447699 [2023-11-19 07:58:53,580 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3250 transitions. [2023-11-19 07:58:53,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3250 transitions. [2023-11-19 07:58:53,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:53,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3250 transitions. [2023-11-19 07:58:53,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 203.125) internal successors, (3250), 16 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states 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 07:58:53,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 478.0) internal successors, (8126), 17 states have internal predecessors, (8126), 0 states have call successors, (0), 0 states 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 07:58:53,596 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 478.0) internal successors, (8126), 17 states have internal predecessors, (8126), 0 states have call successors, (0), 0 states 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 07:58:53,597 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 1071 flow. Second operand 16 states and 3250 transitions. [2023-11-19 07:58:53,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 152 transitions, 1893 flow [2023-11-19 07:58:53,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 152 transitions, 1725 flow, removed 52 selfloop flow, removed 3 redundant places. [2023-11-19 07:58:53,625 INFO L231 Difference]: Finished difference. Result has 120 places, 123 transitions, 1506 flow [2023-11-19 07:58:53,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1506, PETRI_PLACES=120, PETRI_TRANSITIONS=123} [2023-11-19 07:58:53,626 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 100 predicate places. [2023-11-19 07:58:53,626 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 123 transitions, 1506 flow [2023-11-19 07:58:53,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 200.0) internal successors, (2400), 12 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 07:58:53,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:53,627 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:53,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:53,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-19 07:58:53,840 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:53,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:53,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1374631697, now seen corresponding path program 10 times [2023-11-19 07:58:53,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:53,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990850854] [2023-11-19 07:58:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:53,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:53,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:53,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990850854] [2023-11-19 07:58:53,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990850854] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:53,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312787742] [2023-11-19 07:58:53,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:58:53,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:53,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:53,948 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:53,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 07:58:54,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:58:54,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:54,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:58:54,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:54,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:54,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:54,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312787742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:54,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:54,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-19 07:58:54,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943415493] [2023-11-19 07:58:54,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:54,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:58:54,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:54,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:58:54,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:58:54,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:58:54,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 123 transitions, 1506 flow. Second operand has 12 states, 12 states have (on average 200.0) internal successors, (2400), 12 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 07:58:54,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:54,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:58:54,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:54,510 INFO L124 PetriNetUnfolderBase]: 269/468 cut-off events. [2023-11-19 07:58:54,511 INFO L125 PetriNetUnfolderBase]: For 4823/4823 co-relation queries the response was YES. [2023-11-19 07:58:54,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3148 conditions, 468 events. 269/468 cut-off events. For 4823/4823 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1880 event pairs, 41 based on Foata normal form. 4/472 useless extension candidates. Maximal degree in co-relation 3061. Up to 219 conditions per place. [2023-11-19 07:58:54,520 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 80 selfloop transitions, 64 changer transitions 2/146 dead transitions. [2023-11-19 07:58:54,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 146 transitions, 1997 flow [2023-11-19 07:58:54,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:58:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 07:58:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2636 transitions. [2023-11-19 07:58:54,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4242034116511104 [2023-11-19 07:58:54,526 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2636 transitions. [2023-11-19 07:58:54,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2636 transitions. [2023-11-19 07:58:54,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:54,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2636 transitions. [2023-11-19 07:58:54,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 202.76923076923077) internal successors, (2636), 13 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states 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 07:58:54,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 478.0) internal successors, (6692), 14 states have internal predecessors, (6692), 0 states have call successors, (0), 0 states 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 07:58:54,541 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 478.0) internal successors, (6692), 14 states have internal predecessors, (6692), 0 states have call successors, (0), 0 states 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 07:58:54,541 INFO L175 Difference]: Start difference. First operand has 120 places, 123 transitions, 1506 flow. Second operand 13 states and 2636 transitions. [2023-11-19 07:58:54,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 146 transitions, 1997 flow [2023-11-19 07:58:54,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 146 transitions, 1794 flow, removed 80 selfloop flow, removed 5 redundant places. [2023-11-19 07:58:54,576 INFO L231 Difference]: Finished difference. Result has 129 places, 123 transitions, 1443 flow [2023-11-19 07:58:54,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=1303, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1443, PETRI_PLACES=129, PETRI_TRANSITIONS=123} [2023-11-19 07:58:54,577 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 109 predicate places. [2023-11-19 07:58:54,577 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 123 transitions, 1443 flow [2023-11-19 07:58:54,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 200.0) internal successors, (2400), 12 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 07:58:54,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:54,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:54,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:54,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-19 07:58:54,791 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:54,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:54,791 INFO L85 PathProgramCache]: Analyzing trace with hash -256781111, now seen corresponding path program 11 times [2023-11-19 07:58:54,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:54,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572374333] [2023-11-19 07:58:54,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:54,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:54,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:54,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572374333] [2023-11-19 07:58:54,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572374333] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:54,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714330759] [2023-11-19 07:58:54,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:58:54,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:54,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:54,906 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:54,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-19 07:58:55,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:58:55,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:55,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:58:55,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:55,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:55,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714330759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:55,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:55,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-19 07:58:55,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378336365] [2023-11-19 07:58:55,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:55,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:58:55,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:55,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:58:55,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:58:55,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:58:55,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 123 transitions, 1443 flow. Second operand has 13 states, 13 states have (on average 200.15384615384616) internal successors, (2602), 13 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states 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 07:58:55,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:55,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:58:55,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:55,495 INFO L124 PetriNetUnfolderBase]: 297/518 cut-off events. [2023-11-19 07:58:55,495 INFO L125 PetriNetUnfolderBase]: For 6579/6579 co-relation queries the response was YES. [2023-11-19 07:58:55,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3477 conditions, 518 events. 297/518 cut-off events. For 6579/6579 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2143 event pairs, 53 based on Foata normal form. 8/526 useless extension candidates. Maximal degree in co-relation 3415. Up to 319 conditions per place. [2023-11-19 07:58:55,506 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 101 selfloop transitions, 54 changer transitions 7/162 dead transitions. [2023-11-19 07:58:55,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 162 transitions, 2155 flow [2023-11-19 07:58:55,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:58:55,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:58:55,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2238 transitions. [2023-11-19 07:58:55,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42563712438189427 [2023-11-19 07:58:55,511 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2238 transitions. [2023-11-19 07:58:55,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2238 transitions. [2023-11-19 07:58:55,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:55,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2238 transitions. [2023-11-19 07:58:55,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 203.45454545454547) internal successors, (2238), 11 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states 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 07:58:55,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 478.0) internal successors, (5736), 12 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states 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 07:58:55,522 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 478.0) internal successors, (5736), 12 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states 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 07:58:55,523 INFO L175 Difference]: Start difference. First operand has 129 places, 123 transitions, 1443 flow. Second operand 11 states and 2238 transitions. [2023-11-19 07:58:55,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 162 transitions, 2155 flow [2023-11-19 07:58:55,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 162 transitions, 2046 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-11-19 07:58:55,559 INFO L231 Difference]: Finished difference. Result has 132 places, 134 transitions, 1718 flow [2023-11-19 07:58:55,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1718, PETRI_PLACES=132, PETRI_TRANSITIONS=134} [2023-11-19 07:58:55,560 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 112 predicate places. [2023-11-19 07:58:55,561 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 134 transitions, 1718 flow [2023-11-19 07:58:55,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 200.15384615384616) internal successors, (2602), 13 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states 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 07:58:55,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:55,562 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:55,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:55,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-19 07:58:55,776 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:55,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:55,776 INFO L85 PathProgramCache]: Analyzing trace with hash -405403085, now seen corresponding path program 12 times [2023-11-19 07:58:55,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:55,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624807338] [2023-11-19 07:58:55,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:55,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:55,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:55,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624807338] [2023-11-19 07:58:55,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624807338] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:55,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115517776] [2023-11-19 07:58:55,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:58:55,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:55,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:55,859 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:55,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-19 07:58:55,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 07:58:55,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:55,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:58:55,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:56,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:56,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115517776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:56,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:56,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-19 07:58:56,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152128012] [2023-11-19 07:58:56,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:56,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:58:56,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:56,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:58:56,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:58:56,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:58:56,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 134 transitions, 1718 flow. Second operand has 12 states, 12 states have (on average 200.0) internal successors, (2400), 12 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 07:58:56,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:56,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:58:56,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:56,417 INFO L124 PetriNetUnfolderBase]: 307/526 cut-off events. [2023-11-19 07:58:56,418 INFO L125 PetriNetUnfolderBase]: For 7831/7831 co-relation queries the response was YES. [2023-11-19 07:58:56,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3714 conditions, 526 events. 307/526 cut-off events. For 7831/7831 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2131 event pairs, 53 based on Foata normal form. 16/542 useless extension candidates. Maximal degree in co-relation 3613. Up to 331 conditions per place. [2023-11-19 07:58:56,431 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 105 selfloop transitions, 63 changer transitions 2/170 dead transitions. [2023-11-19 07:58:56,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 170 transitions, 2370 flow [2023-11-19 07:58:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:58:56,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:58:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2441 transitions. [2023-11-19 07:58:56,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425557880055788 [2023-11-19 07:58:56,437 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2441 transitions. [2023-11-19 07:58:56,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2441 transitions. [2023-11-19 07:58:56,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:56,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2441 transitions. [2023-11-19 07:58:56,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 203.41666666666666) internal successors, (2441), 12 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states 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 07:58:56,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 0 states have call successors, (0), 0 states 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 07:58:56,449 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 0 states have call successors, (0), 0 states 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 07:58:56,449 INFO L175 Difference]: Start difference. First operand has 132 places, 134 transitions, 1718 flow. Second operand 12 states and 2441 transitions. [2023-11-19 07:58:56,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 170 transitions, 2370 flow [2023-11-19 07:58:56,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 170 transitions, 2171 flow, removed 60 selfloop flow, removed 6 redundant places. [2023-11-19 07:58:56,497 INFO L231 Difference]: Finished difference. Result has 138 places, 143 transitions, 1853 flow [2023-11-19 07:58:56,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1853, PETRI_PLACES=138, PETRI_TRANSITIONS=143} [2023-11-19 07:58:56,499 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 118 predicate places. [2023-11-19 07:58:56,499 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 143 transitions, 1853 flow [2023-11-19 07:58:56,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 200.0) internal successors, (2400), 12 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 07:58:56,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:56,500 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:56,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:56,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-19 07:58:56,720 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:56,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:56,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1065567885, now seen corresponding path program 13 times [2023-11-19 07:58:56,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:56,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694990127] [2023-11-19 07:58:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:56,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:56,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:56,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694990127] [2023-11-19 07:58:56,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694990127] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:56,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68957411] [2023-11-19 07:58:56,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:58:56,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:56,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:56,802 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:56,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-19 07:58:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:56,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:58:56,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:56,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:57,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68957411] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:57,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:57,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-19 07:58:57,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672101996] [2023-11-19 07:58:57,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:57,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:58:57,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:57,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:58:57,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:58:57,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:58:57,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 143 transitions, 1853 flow. Second operand has 12 states, 12 states have (on average 200.0) internal successors, (2400), 12 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 07:58:57,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:57,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:58:57,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:57,393 INFO L124 PetriNetUnfolderBase]: 307/520 cut-off events. [2023-11-19 07:58:57,393 INFO L125 PetriNetUnfolderBase]: For 7513/7513 co-relation queries the response was YES. [2023-11-19 07:58:57,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3727 conditions, 520 events. 307/520 cut-off events. For 7513/7513 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2045 event pairs, 56 based on Foata normal form. 8/528 useless extension candidates. Maximal degree in co-relation 3625. Up to 338 conditions per place. [2023-11-19 07:58:57,404 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 103 selfloop transitions, 69 changer transitions 0/172 dead transitions. [2023-11-19 07:58:57,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 172 transitions, 2395 flow [2023-11-19 07:58:57,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:58:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-19 07:58:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3444 transitions. [2023-11-19 07:58:57,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42382476002953484 [2023-11-19 07:58:57,416 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3444 transitions. [2023-11-19 07:58:57,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3444 transitions. [2023-11-19 07:58:57,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:57,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3444 transitions. [2023-11-19 07:58:57,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 202.58823529411765) internal successors, (3444), 17 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states 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 07:58:57,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 478.0) internal successors, (8604), 18 states have internal predecessors, (8604), 0 states have call successors, (0), 0 states 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 07:58:57,454 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 478.0) internal successors, (8604), 18 states have internal predecessors, (8604), 0 states have call successors, (0), 0 states 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 07:58:57,455 INFO L175 Difference]: Start difference. First operand has 138 places, 143 transitions, 1853 flow. Second operand 17 states and 3444 transitions. [2023-11-19 07:58:57,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 172 transitions, 2395 flow [2023-11-19 07:58:57,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 172 transitions, 2075 flow, removed 102 selfloop flow, removed 8 redundant places. [2023-11-19 07:58:57,497 INFO L231 Difference]: Finished difference. Result has 148 places, 149 transitions, 1802 flow [2023-11-19 07:58:57,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1802, PETRI_PLACES=148, PETRI_TRANSITIONS=149} [2023-11-19 07:58:57,498 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 128 predicate places. [2023-11-19 07:58:57,498 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 149 transitions, 1802 flow [2023-11-19 07:58:57,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 200.0) internal successors, (2400), 12 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states 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 07:58:57,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:57,499 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:57,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:57,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-19 07:58:57,721 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:57,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:57,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1790467067, now seen corresponding path program 14 times [2023-11-19 07:58:57,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:57,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18859279] [2023-11-19 07:58:57,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:57,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:57,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:57,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18859279] [2023-11-19 07:58:57,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18859279] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:57,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953793348] [2023-11-19 07:58:57,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:58:57,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:57,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:57,806 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:57,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-19 07:58:57,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:58:57,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:57,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:58:57,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:57,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:58,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953793348] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:58,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:58,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-19 07:58:58,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710094432] [2023-11-19 07:58:58,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:58,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:58:58,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:58,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:58:58,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:58:58,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:58:58,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 149 transitions, 1802 flow. Second operand has 13 states, 13 states have (on average 200.3846153846154) internal successors, (2605), 13 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states 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 07:58:58,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:58,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:58:58,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:58,507 INFO L124 PetriNetUnfolderBase]: 366/625 cut-off events. [2023-11-19 07:58:58,507 INFO L125 PetriNetUnfolderBase]: For 7481/7481 co-relation queries the response was YES. [2023-11-19 07:58:58,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4126 conditions, 625 events. 366/625 cut-off events. For 7481/7481 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2559 event pairs, 34 based on Foata normal form. 10/635 useless extension candidates. Maximal degree in co-relation 4025. Up to 225 conditions per place. [2023-11-19 07:58:58,520 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 123 selfloop transitions, 79 changer transitions 0/202 dead transitions. [2023-11-19 07:58:58,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 202 transitions, 2649 flow [2023-11-19 07:58:58,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:58:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:58:58,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2843 transitions. [2023-11-19 07:58:58,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4248356246264196 [2023-11-19 07:58:58,527 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2843 transitions. [2023-11-19 07:58:58,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2843 transitions. [2023-11-19 07:58:58,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:58,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2843 transitions. [2023-11-19 07:58:58,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 203.07142857142858) internal successors, (2843), 14 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states 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 07:58:58,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 478.0) internal successors, (7170), 15 states have internal predecessors, (7170), 0 states have call successors, (0), 0 states 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 07:58:58,543 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 478.0) internal successors, (7170), 15 states have internal predecessors, (7170), 0 states have call successors, (0), 0 states 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 07:58:58,543 INFO L175 Difference]: Start difference. First operand has 148 places, 149 transitions, 1802 flow. Second operand 14 states and 2843 transitions. [2023-11-19 07:58:58,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 202 transitions, 2649 flow [2023-11-19 07:58:58,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 202 transitions, 2442 flow, removed 38 selfloop flow, removed 12 redundant places. [2023-11-19 07:58:58,597 INFO L231 Difference]: Finished difference. Result has 154 places, 173 transitions, 2099 flow [2023-11-19 07:58:58,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2099, PETRI_PLACES=154, PETRI_TRANSITIONS=173} [2023-11-19 07:58:58,601 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 134 predicate places. [2023-11-19 07:58:58,602 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 173 transitions, 2099 flow [2023-11-19 07:58:58,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 200.3846153846154) internal successors, (2605), 13 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states 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 07:58:58,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:58,603 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:58,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:58,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-19 07:58:58,816 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:58:58,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:58,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1587265189, now seen corresponding path program 15 times [2023-11-19 07:58:58,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:58,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44442991] [2023-11-19 07:58:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:58,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:58,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:58,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44442991] [2023-11-19 07:58:58,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44442991] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:58,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006062199] [2023-11-19 07:58:58,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:58:58,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:58,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:58,922 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:58,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-19 07:58:59,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:58:59,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:59,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:58:59,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:59,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:59,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006062199] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:59,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:59,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-19 07:58:59,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303375066] [2023-11-19 07:58:59,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:59,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:58:59,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:59,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:58:59,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:58:59,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:58:59,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 173 transitions, 2099 flow. Second operand has 13 states, 13 states have (on average 199.92307692307693) internal successors, (2599), 13 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states 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 07:58:59,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:59,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:58:59,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:59,668 INFO L124 PetriNetUnfolderBase]: 487/820 cut-off events. [2023-11-19 07:58:59,668 INFO L125 PetriNetUnfolderBase]: For 12130/12130 co-relation queries the response was YES. [2023-11-19 07:58:59,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5663 conditions, 820 events. 487/820 cut-off events. For 12130/12130 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3554 event pairs, 37 based on Foata normal form. 14/834 useless extension candidates. Maximal degree in co-relation 5555. Up to 301 conditions per place. [2023-11-19 07:58:59,686 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 103 selfloop transitions, 154 changer transitions 0/257 dead transitions. [2023-11-19 07:58:59,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 257 transitions, 3637 flow [2023-11-19 07:58:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:58:59,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-19 07:58:59,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3452 transitions. [2023-11-19 07:58:59,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4248092542456313 [2023-11-19 07:58:59,694 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3452 transitions. [2023-11-19 07:58:59,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3452 transitions. [2023-11-19 07:58:59,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:59,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3452 transitions. [2023-11-19 07:58:59,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 203.05882352941177) internal successors, (3452), 17 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states 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 07:58:59,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 478.0) internal successors, (8604), 18 states have internal predecessors, (8604), 0 states have call successors, (0), 0 states 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 07:58:59,712 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 478.0) internal successors, (8604), 18 states have internal predecessors, (8604), 0 states have call successors, (0), 0 states 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 07:58:59,712 INFO L175 Difference]: Start difference. First operand has 154 places, 173 transitions, 2099 flow. Second operand 17 states and 3452 transitions. [2023-11-19 07:58:59,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 257 transitions, 3637 flow [2023-11-19 07:58:59,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 257 transitions, 3493 flow, removed 49 selfloop flow, removed 4 redundant places. [2023-11-19 07:58:59,782 INFO L231 Difference]: Finished difference. Result has 174 places, 229 transitions, 3352 flow [2023-11-19 07:58:59,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=1971, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3352, PETRI_PLACES=174, PETRI_TRANSITIONS=229} [2023-11-19 07:58:59,783 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 154 predicate places. [2023-11-19 07:58:59,784 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 229 transitions, 3352 flow [2023-11-19 07:58:59,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 199.92307692307693) internal successors, (2599), 13 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states 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 07:58:59,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:59,785 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:59,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:00,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-19 07:59:00,003 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:59:00,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:00,003 INFO L85 PathProgramCache]: Analyzing trace with hash -908635813, now seen corresponding path program 16 times [2023-11-19 07:59:00,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:00,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358179155] [2023-11-19 07:59:00,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:00,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:00,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:00,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358179155] [2023-11-19 07:59:00,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358179155] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:00,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451873491] [2023-11-19 07:59:00,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:59:00,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:00,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:00,088 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:00,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-19 07:59:00,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:59:00,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:59:00,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:59:00,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:00,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:00,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451873491] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:00,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:00,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-19 07:59:00,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250781632] [2023-11-19 07:59:00,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:00,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:59:00,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:00,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:59:00,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:59:00,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:59:00,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 229 transitions, 3352 flow. Second operand has 15 states, 15 states have (on average 199.73333333333332) internal successors, (2996), 15 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 07:59:00,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:00,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:59:00,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:00,780 INFO L124 PetriNetUnfolderBase]: 528/883 cut-off events. [2023-11-19 07:59:00,780 INFO L125 PetriNetUnfolderBase]: For 15081/15081 co-relation queries the response was YES. [2023-11-19 07:59:00,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7026 conditions, 883 events. 528/883 cut-off events. For 15081/15081 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3908 event pairs, 60 based on Foata normal form. 6/889 useless extension candidates. Maximal degree in co-relation 6905. Up to 400 conditions per place. [2023-11-19 07:59:00,799 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 132 selfloop transitions, 138 changer transitions 6/276 dead transitions. [2023-11-19 07:59:00,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 276 transitions, 4611 flow [2023-11-19 07:59:00,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:59:00,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 07:59:00,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3238 transitions. [2023-11-19 07:59:00,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4233786610878661 [2023-11-19 07:59:00,807 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3238 transitions. [2023-11-19 07:59:00,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3238 transitions. [2023-11-19 07:59:00,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:00,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3238 transitions. [2023-11-19 07:59:00,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 202.375) internal successors, (3238), 16 states have internal predecessors, (3238), 0 states have call successors, (0), 0 states 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 07:59:00,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 478.0) internal successors, (8126), 17 states have internal predecessors, (8126), 0 states have call successors, (0), 0 states 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 07:59:00,830 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 478.0) internal successors, (8126), 17 states have internal predecessors, (8126), 0 states have call successors, (0), 0 states 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 07:59:00,830 INFO L175 Difference]: Start difference. First operand has 174 places, 229 transitions, 3352 flow. Second operand 16 states and 3238 transitions. [2023-11-19 07:59:00,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 276 transitions, 4611 flow [2023-11-19 07:59:00,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 276 transitions, 4129 flow, removed 223 selfloop flow, removed 4 redundant places. [2023-11-19 07:59:00,957 INFO L231 Difference]: Finished difference. Result has 191 places, 248 transitions, 3714 flow [2023-11-19 07:59:00,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=3050, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3714, PETRI_PLACES=191, PETRI_TRANSITIONS=248} [2023-11-19 07:59:00,958 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 171 predicate places. [2023-11-19 07:59:00,958 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 248 transitions, 3714 flow [2023-11-19 07:59:00,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 199.73333333333332) internal successors, (2996), 15 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 07:59:00,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:00,959 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:00,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-19 07:59:01,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:01,179 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:59:01,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:01,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1438504925, now seen corresponding path program 17 times [2023-11-19 07:59:01,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:01,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837479804] [2023-11-19 07:59:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:01,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:01,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:01,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837479804] [2023-11-19 07:59:01,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837479804] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:01,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788617369] [2023-11-19 07:59:01,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:59:01,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:01,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:01,266 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:01,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-19 07:59:01,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:59:01,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:59:01,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:59:01,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:01,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:01,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788617369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:01,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:01,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-19 07:59:01,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693891732] [2023-11-19 07:59:01,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:01,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:59:01,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:01,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:59:01,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:59:01,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:59:01,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 248 transitions, 3714 flow. Second operand has 15 states, 15 states have (on average 200.13333333333333) internal successors, (3002), 15 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states 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 07:59:01,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:01,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:59:01,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:02,258 INFO L124 PetriNetUnfolderBase]: 636/1067 cut-off events. [2023-11-19 07:59:02,258 INFO L125 PetriNetUnfolderBase]: For 19963/19963 co-relation queries the response was YES. [2023-11-19 07:59:02,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8401 conditions, 1067 events. 636/1067 cut-off events. For 19963/19963 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4924 event pairs, 42 based on Foata normal form. 10/1077 useless extension candidates. Maximal degree in co-relation 8313. Up to 348 conditions per place. [2023-11-19 07:59:02,274 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 171 selfloop transitions, 169 changer transitions 0/340 dead transitions. [2023-11-19 07:59:02,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 340 transitions, 5523 flow [2023-11-19 07:59:02,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 07:59:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-19 07:59:02,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4660 transitions. [2023-11-19 07:59:02,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42386756412588683 [2023-11-19 07:59:02,282 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4660 transitions. [2023-11-19 07:59:02,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4660 transitions. [2023-11-19 07:59:02,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:02,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4660 transitions. [2023-11-19 07:59:02,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 202.6086956521739) internal successors, (4660), 23 states have internal predecessors, (4660), 0 states have call successors, (0), 0 states 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 07:59:02,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 478.0) internal successors, (11472), 24 states have internal predecessors, (11472), 0 states have call successors, (0), 0 states 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 07:59:02,303 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 478.0) internal successors, (11472), 24 states have internal predecessors, (11472), 0 states have call successors, (0), 0 states 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 07:59:02,303 INFO L175 Difference]: Start difference. First operand has 191 places, 248 transitions, 3714 flow. Second operand 23 states and 4660 transitions. [2023-11-19 07:59:02,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 340 transitions, 5523 flow [2023-11-19 07:59:02,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 340 transitions, 5305 flow, removed 39 selfloop flow, removed 8 redundant places. [2023-11-19 07:59:02,437 INFO L231 Difference]: Finished difference. Result has 209 places, 298 transitions, 4886 flow [2023-11-19 07:59:02,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=3531, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4886, PETRI_PLACES=209, PETRI_TRANSITIONS=298} [2023-11-19 07:59:02,438 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 189 predicate places. [2023-11-19 07:59:02,438 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 298 transitions, 4886 flow [2023-11-19 07:59:02,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 200.13333333333333) internal successors, (3002), 15 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states 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 07:59:02,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:02,439 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:02,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-19 07:59:02,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:02,652 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:59:02,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:02,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2027828177, now seen corresponding path program 18 times [2023-11-19 07:59:02,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:02,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726223577] [2023-11-19 07:59:02,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:02,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:02,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:02,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726223577] [2023-11-19 07:59:02,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726223577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:02,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075973302] [2023-11-19 07:59:02,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:59:02,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:02,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:02,768 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:02,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-19 07:59:02,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 07:59:02,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:59:02,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:59:02,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:02,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:03,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075973302] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:03,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:03,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-19 07:59:03,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313314099] [2023-11-19 07:59:03,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:03,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:59:03,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:03,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:59:03,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:59:03,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:59:03,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 298 transitions, 4886 flow. Second operand has 15 states, 15 states have (on average 199.86666666666667) internal successors, (2998), 15 states have internal predecessors, (2998), 0 states have call successors, (0), 0 states 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 07:59:03,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:03,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:59:03,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:03,624 INFO L124 PetriNetUnfolderBase]: 685/1146 cut-off events. [2023-11-19 07:59:03,624 INFO L125 PetriNetUnfolderBase]: For 30958/30958 co-relation queries the response was YES. [2023-11-19 07:59:03,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9761 conditions, 1146 events. 685/1146 cut-off events. For 30958/30958 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5386 event pairs, 148 based on Foata normal form. 28/1174 useless extension candidates. Maximal degree in co-relation 9619. Up to 984 conditions per place. [2023-11-19 07:59:03,643 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 299 selfloop transitions, 59 changer transitions 0/358 dead transitions. [2023-11-19 07:59:03,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 358 transitions, 6494 flow [2023-11-19 07:59:03,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:59:03,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:59:03,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3858 transitions. [2023-11-19 07:59:03,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247963003743669 [2023-11-19 07:59:03,655 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3858 transitions. [2023-11-19 07:59:03,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3858 transitions. [2023-11-19 07:59:03,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:03,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3858 transitions. [2023-11-19 07:59:03,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 203.05263157894737) internal successors, (3858), 19 states have internal predecessors, (3858), 0 states have call successors, (0), 0 states 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 07:59:03,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 478.0) internal successors, (9560), 20 states have internal predecessors, (9560), 0 states have call successors, (0), 0 states 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 07:59:03,673 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 478.0) internal successors, (9560), 20 states have internal predecessors, (9560), 0 states have call successors, (0), 0 states 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 07:59:03,673 INFO L175 Difference]: Start difference. First operand has 209 places, 298 transitions, 4886 flow. Second operand 19 states and 3858 transitions. [2023-11-19 07:59:03,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 358 transitions, 6494 flow [2023-11-19 07:59:03,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 358 transitions, 6291 flow, removed 59 selfloop flow, removed 10 redundant places. [2023-11-19 07:59:03,908 INFO L231 Difference]: Finished difference. Result has 229 places, 323 transitions, 5581 flow [2023-11-19 07:59:03,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=4683, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5581, PETRI_PLACES=229, PETRI_TRANSITIONS=323} [2023-11-19 07:59:03,908 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 209 predicate places. [2023-11-19 07:59:03,909 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 323 transitions, 5581 flow [2023-11-19 07:59:03,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 199.86666666666667) internal successors, (2998), 15 states have internal predecessors, (2998), 0 states have call successors, (0), 0 states 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 07:59:03,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:03,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:03,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-19 07:59:04,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:04,110 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:59:04,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:04,110 INFO L85 PathProgramCache]: Analyzing trace with hash -30532341, now seen corresponding path program 19 times [2023-11-19 07:59:04,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:04,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421806049] [2023-11-19 07:59:04,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:04,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:04,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:04,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421806049] [2023-11-19 07:59:04,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421806049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:04,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053772186] [2023-11-19 07:59:04,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:59:04,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:04,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:04,189 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:04,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-19 07:59:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:04,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:59:04,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:04,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:04,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053772186] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:04,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:04,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-19 07:59:04,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848152463] [2023-11-19 07:59:04,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:04,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:59:04,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:04,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:59:04,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:59:04,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:59:04,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 323 transitions, 5581 flow. Second operand has 13 states, 13 states have (on average 200.0) internal successors, (2600), 13 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states 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 07:59:04,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:04,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:59:04,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:04,954 INFO L124 PetriNetUnfolderBase]: 694/1161 cut-off events. [2023-11-19 07:59:04,954 INFO L125 PetriNetUnfolderBase]: For 31346/31346 co-relation queries the response was YES. [2023-11-19 07:59:04,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10396 conditions, 1161 events. 694/1161 cut-off events. For 31346/31346 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5484 event pairs, 149 based on Foata normal form. 4/1165 useless extension candidates. Maximal degree in co-relation 10227. Up to 1019 conditions per place. [2023-11-19 07:59:04,974 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 285 selfloop transitions, 56 changer transitions 2/343 dead transitions. [2023-11-19 07:59:04,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 343 transitions, 6640 flow [2023-11-19 07:59:04,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:59:04,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:59:04,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2230 transitions. [2023-11-19 07:59:04,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241156333206542 [2023-11-19 07:59:04,978 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2230 transitions. [2023-11-19 07:59:04,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2230 transitions. [2023-11-19 07:59:04,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:04,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2230 transitions. [2023-11-19 07:59:04,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 202.72727272727272) internal successors, (2230), 11 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states 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 07:59:04,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 478.0) internal successors, (5736), 12 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states 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 07:59:04,988 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 478.0) internal successors, (5736), 12 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states 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 07:59:04,988 INFO L175 Difference]: Start difference. First operand has 229 places, 323 transitions, 5581 flow. Second operand 11 states and 2230 transitions. [2023-11-19 07:59:04,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 343 transitions, 6640 flow [2023-11-19 07:59:05,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 343 transitions, 5981 flow, removed 309 selfloop flow, removed 8 redundant places. [2023-11-19 07:59:05,224 INFO L231 Difference]: Finished difference. Result has 232 places, 326 transitions, 5200 flow [2023-11-19 07:59:05,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=5000, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5200, PETRI_PLACES=232, PETRI_TRANSITIONS=326} [2023-11-19 07:59:05,224 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 212 predicate places. [2023-11-19 07:59:05,225 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 326 transitions, 5200 flow [2023-11-19 07:59:05,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 200.0) internal successors, (2600), 13 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states 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 07:59:05,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:05,225 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:05,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-19 07:59:05,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:05,426 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:59:05,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:05,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1192634673, now seen corresponding path program 20 times [2023-11-19 07:59:05,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:05,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852239420] [2023-11-19 07:59:05,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:05,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:05,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:05,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852239420] [2023-11-19 07:59:05,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852239420] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:05,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347316435] [2023-11-19 07:59:05,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:59:05,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:05,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:05,504 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:05,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-19 07:59:05,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:59:05,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:59:05,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:59:05,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:05,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:05,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347316435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:05,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:05,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-19 07:59:05,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059034093] [2023-11-19 07:59:05,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:05,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:59:05,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:05,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:59:05,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:59:05,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:59:05,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 326 transitions, 5200 flow. Second operand has 11 states, 11 states have (on average 200.0909090909091) internal successors, (2201), 11 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states 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 07:59:05,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:05,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:59:05,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:06,206 INFO L124 PetriNetUnfolderBase]: 715/1206 cut-off events. [2023-11-19 07:59:06,206 INFO L125 PetriNetUnfolderBase]: For 36417/36417 co-relation queries the response was YES. [2023-11-19 07:59:06,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10385 conditions, 1206 events. 715/1206 cut-off events. For 36417/36417 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5840 event pairs, 89 based on Foata normal form. 2/1208 useless extension candidates. Maximal degree in co-relation 10231. Up to 735 conditions per place. [2023-11-19 07:59:06,232 INFO L140 encePairwiseOnDemand]: 473/478 looper letters, 247 selfloop transitions, 102 changer transitions 5/354 dead transitions. [2023-11-19 07:59:06,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 354 transitions, 6337 flow [2023-11-19 07:59:06,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:59:06,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:59:06,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1428 transitions. [2023-11-19 07:59:06,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42677824267782427 [2023-11-19 07:59:06,235 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1428 transitions. [2023-11-19 07:59:06,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1428 transitions. [2023-11-19 07:59:06,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:06,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1428 transitions. [2023-11-19 07:59:06,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 07:59:06,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:59:06,243 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states 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 07:59:06,243 INFO L175 Difference]: Start difference. First operand has 232 places, 326 transitions, 5200 flow. Second operand 7 states and 1428 transitions. [2023-11-19 07:59:06,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 354 transitions, 6337 flow [2023-11-19 07:59:06,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 354 transitions, 6123 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-11-19 07:59:06,467 INFO L231 Difference]: Finished difference. Result has 234 places, 330 transitions, 5433 flow [2023-11-19 07:59:06,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=4991, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5433, PETRI_PLACES=234, PETRI_TRANSITIONS=330} [2023-11-19 07:59:06,468 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 214 predicate places. [2023-11-19 07:59:06,468 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 330 transitions, 5433 flow [2023-11-19 07:59:06,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 200.0909090909091) internal successors, (2201), 11 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states 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 07:59:06,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:06,469 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:06,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-19 07:59:06,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:06,670 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:59:06,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:06,671 INFO L85 PathProgramCache]: Analyzing trace with hash 711893413, now seen corresponding path program 21 times [2023-11-19 07:59:06,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:06,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574780427] [2023-11-19 07:59:06,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:06,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:06,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:06,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574780427] [2023-11-19 07:59:06,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574780427] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:06,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735147731] [2023-11-19 07:59:06,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:59:06,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:06,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:06,786 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:06,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-19 07:59:06,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:59:06,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:59:06,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:59:06,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:06,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:06,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735147731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:06,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:06,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-19 07:59:06,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001369263] [2023-11-19 07:59:06,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:06,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:59:06,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:06,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:59:06,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:59:07,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:59:07,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 330 transitions, 5433 flow. Second operand has 13 states, 13 states have (on average 200.0) internal successors, (2600), 13 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states 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 07:59:07,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:07,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:59:07,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:07,611 INFO L124 PetriNetUnfolderBase]: 777/1288 cut-off events. [2023-11-19 07:59:07,611 INFO L125 PetriNetUnfolderBase]: For 44127/44127 co-relation queries the response was YES. [2023-11-19 07:59:07,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11859 conditions, 1288 events. 777/1288 cut-off events. For 44127/44127 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6148 event pairs, 37 based on Foata normal form. 8/1296 useless extension candidates. Maximal degree in co-relation 11733. Up to 884 conditions per place. [2023-11-19 07:59:07,640 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 275 selfloop transitions, 118 changer transitions 0/393 dead transitions. [2023-11-19 07:59:07,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 393 transitions, 7434 flow [2023-11-19 07:59:07,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:59:07,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-19 07:59:07,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3449 transitions. [2023-11-19 07:59:07,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4244400689145951 [2023-11-19 07:59:07,646 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3449 transitions. [2023-11-19 07:59:07,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3449 transitions. [2023-11-19 07:59:07,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:07,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3449 transitions. [2023-11-19 07:59:07,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 202.88235294117646) internal successors, (3449), 17 states have internal predecessors, (3449), 0 states have call successors, (0), 0 states 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 07:59:07,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 478.0) internal successors, (8604), 18 states have internal predecessors, (8604), 0 states have call successors, (0), 0 states 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 07:59:07,660 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 478.0) internal successors, (8604), 18 states have internal predecessors, (8604), 0 states have call successors, (0), 0 states 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 07:59:07,661 INFO L175 Difference]: Start difference. First operand has 234 places, 330 transitions, 5433 flow. Second operand 17 states and 3449 transitions. [2023-11-19 07:59:07,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 393 transitions, 7434 flow [2023-11-19 07:59:07,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 393 transitions, 7227 flow, removed 46 selfloop flow, removed 6 redundant places. [2023-11-19 07:59:07,981 INFO L231 Difference]: Finished difference. Result has 247 places, 372 transitions, 6685 flow [2023-11-19 07:59:07,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=5280, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6685, PETRI_PLACES=247, PETRI_TRANSITIONS=372} [2023-11-19 07:59:07,982 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2023-11-19 07:59:07,982 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 372 transitions, 6685 flow [2023-11-19 07:59:07,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 200.0) internal successors, (2600), 13 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states 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 07:59:07,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:07,982 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:08,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:08,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-19 07:59:08,183 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:59:08,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:08,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1072920697, now seen corresponding path program 22 times [2023-11-19 07:59:08,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:08,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384985407] [2023-11-19 07:59:08,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:08,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:08,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:08,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384985407] [2023-11-19 07:59:08,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384985407] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:08,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043015711] [2023-11-19 07:59:08,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:59:08,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:08,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:08,269 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:08,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-19 07:59:08,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:59:08,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:59:08,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:59:08,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:08,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:08,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043015711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:08,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:08,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-19 07:59:08,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850508086] [2023-11-19 07:59:08,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:08,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:59:08,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:08,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:59:08,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:59:08,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:59:08,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 372 transitions, 6685 flow. Second operand has 15 states, 15 states have (on average 199.73333333333332) internal successors, (2996), 15 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 07:59:08,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:08,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:59:08,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:09,170 INFO L124 PetriNetUnfolderBase]: 821/1356 cut-off events. [2023-11-19 07:59:09,170 INFO L125 PetriNetUnfolderBase]: For 49437/49437 co-relation queries the response was YES. [2023-11-19 07:59:09,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13156 conditions, 1356 events. 821/1356 cut-off events. For 49437/49437 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6527 event pairs, 169 based on Foata normal form. 8/1364 useless extension candidates. Maximal degree in co-relation 12917. Up to 1137 conditions per place. [2023-11-19 07:59:09,191 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 320 selfloop transitions, 94 changer transitions 5/419 dead transitions. [2023-11-19 07:59:09,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 419 transitions, 8833 flow [2023-11-19 07:59:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:59:09,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-19 07:59:09,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3035 transitions. [2023-11-19 07:59:09,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329149232914925 [2023-11-19 07:59:09,197 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3035 transitions. [2023-11-19 07:59:09,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3035 transitions. [2023-11-19 07:59:09,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:09,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3035 transitions. [2023-11-19 07:59:09,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 202.33333333333334) internal successors, (3035), 15 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:09,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 478.0) internal successors, (7648), 16 states have internal predecessors, (7648), 0 states have call successors, (0), 0 states 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 07:59:09,210 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 478.0) internal successors, (7648), 16 states have internal predecessors, (7648), 0 states have call successors, (0), 0 states 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 07:59:09,210 INFO L175 Difference]: Start difference. First operand has 247 places, 372 transitions, 6685 flow. Second operand 15 states and 3035 transitions. [2023-11-19 07:59:09,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 419 transitions, 8833 flow [2023-11-19 07:59:09,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 419 transitions, 7496 flow, removed 615 selfloop flow, removed 8 redundant places. [2023-11-19 07:59:09,616 INFO L231 Difference]: Finished difference. Result has 260 places, 395 transitions, 6787 flow [2023-11-19 07:59:09,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=5824, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6787, PETRI_PLACES=260, PETRI_TRANSITIONS=395} [2023-11-19 07:59:09,617 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 240 predicate places. [2023-11-19 07:59:09,617 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 395 transitions, 6787 flow [2023-11-19 07:59:09,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 199.73333333333332) internal successors, (2996), 15 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 07:59:09,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:09,618 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:09,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-19 07:59:09,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-19 07:59:09,831 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:59:09,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:09,831 INFO L85 PathProgramCache]: Analyzing trace with hash -488130517, now seen corresponding path program 23 times [2023-11-19 07:59:09,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:09,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012442243] [2023-11-19 07:59:09,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:09,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:09,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:09,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012442243] [2023-11-19 07:59:09,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012442243] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:09,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240628029] [2023-11-19 07:59:09,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:59:09,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:09,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:09,909 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:09,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-19 07:59:10,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:59:10,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:59:10,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:59:10,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:10,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:10,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240628029] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:10,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:10,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-19 07:59:10,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305787528] [2023-11-19 07:59:10,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:10,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:59:10,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:10,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:59:10,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:59:10,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:59:10,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 395 transitions, 6787 flow. Second operand has 13 states, 13 states have (on average 199.92307692307693) internal successors, (2599), 13 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states 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 07:59:10,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:10,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:59:10,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:10,699 INFO L124 PetriNetUnfolderBase]: 817/1348 cut-off events. [2023-11-19 07:59:10,699 INFO L125 PetriNetUnfolderBase]: For 37124/37124 co-relation queries the response was YES. [2023-11-19 07:59:10,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11913 conditions, 1348 events. 817/1348 cut-off events. For 37124/37124 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6487 event pairs, 109 based on Foata normal form. 4/1352 useless extension candidates. Maximal degree in co-relation 11813. Up to 883 conditions per place. [2023-11-19 07:59:10,718 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 287 selfloop transitions, 129 changer transitions 3/419 dead transitions. [2023-11-19 07:59:10,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 419 transitions, 7992 flow [2023-11-19 07:59:10,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:59:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:59:10,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2232 transitions. [2023-11-19 07:59:10,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4244960060859643 [2023-11-19 07:59:10,722 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2232 transitions. [2023-11-19 07:59:10,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2232 transitions. [2023-11-19 07:59:10,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:10,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2232 transitions. [2023-11-19 07:59:10,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 202.9090909090909) internal successors, (2232), 11 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states 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 07:59:10,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 478.0) internal successors, (5736), 12 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states 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 07:59:10,731 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 478.0) internal successors, (5736), 12 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states 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 07:59:10,731 INFO L175 Difference]: Start difference. First operand has 260 places, 395 transitions, 6787 flow. Second operand 11 states and 2232 transitions. [2023-11-19 07:59:10,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 419 transitions, 7992 flow [2023-11-19 07:59:11,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 419 transitions, 7578 flow, removed 166 selfloop flow, removed 5 redundant places. [2023-11-19 07:59:11,015 INFO L231 Difference]: Finished difference. Result has 266 places, 398 transitions, 6931 flow [2023-11-19 07:59:11,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=6363, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6931, PETRI_PLACES=266, PETRI_TRANSITIONS=398} [2023-11-19 07:59:11,016 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 246 predicate places. [2023-11-19 07:59:11,016 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 398 transitions, 6931 flow [2023-11-19 07:59:11,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 199.92307692307693) internal successors, (2599), 13 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states 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 07:59:11,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:11,017 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:11,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-19 07:59:11,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:11,217 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:59:11,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:11,218 INFO L85 PathProgramCache]: Analyzing trace with hash 254295237, now seen corresponding path program 24 times [2023-11-19 07:59:11,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:11,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524422580] [2023-11-19 07:59:11,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:11,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:11,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:11,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524422580] [2023-11-19 07:59:11,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524422580] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:11,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306863795] [2023-11-19 07:59:11,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:59:11,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:11,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:11,305 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:11,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-19 07:59:11,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-19 07:59:11,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:59:11,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:59:11,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:11,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:11,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306863795] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:11,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:11,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-19 07:59:11,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112146328] [2023-11-19 07:59:11,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:11,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:59:11,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:11,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:59:11,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:59:11,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:59:11,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 398 transitions, 6931 flow. Second operand has 13 states, 13 states have (on average 199.92307692307693) internal successors, (2599), 13 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states 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 07:59:11,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:11,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:59:11,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:12,206 INFO L124 PetriNetUnfolderBase]: 855/1406 cut-off events. [2023-11-19 07:59:12,206 INFO L125 PetriNetUnfolderBase]: For 34721/34721 co-relation queries the response was YES. [2023-11-19 07:59:12,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12343 conditions, 1406 events. 855/1406 cut-off events. For 34721/34721 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6802 event pairs, 41 based on Foata normal form. 10/1416 useless extension candidates. Maximal degree in co-relation 12239. Up to 1007 conditions per place. [2023-11-19 07:59:12,229 INFO L140 encePairwiseOnDemand]: 472/478 looper letters, 341 selfloop transitions, 101 changer transitions 0/442 dead transitions. [2023-11-19 07:59:12,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 442 transitions, 8121 flow [2023-11-19 07:59:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:59:12,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:59:12,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2836 transitions. [2023-11-19 07:59:12,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4237895995218171 [2023-11-19 07:59:12,234 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2836 transitions. [2023-11-19 07:59:12,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2836 transitions. [2023-11-19 07:59:12,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:12,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2836 transitions. [2023-11-19 07:59:12,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 202.57142857142858) internal successors, (2836), 14 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states 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 07:59:12,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 478.0) internal successors, (7170), 15 states have internal predecessors, (7170), 0 states have call successors, (0), 0 states 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 07:59:12,245 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 478.0) internal successors, (7170), 15 states have internal predecessors, (7170), 0 states have call successors, (0), 0 states 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 07:59:12,246 INFO L175 Difference]: Start difference. First operand has 266 places, 398 transitions, 6931 flow. Second operand 14 states and 2836 transitions. [2023-11-19 07:59:12,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 442 transitions, 8121 flow [2023-11-19 07:59:12,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 442 transitions, 7852 flow, removed 67 selfloop flow, removed 5 redundant places. [2023-11-19 07:59:12,583 INFO L231 Difference]: Finished difference. Result has 276 places, 420 transitions, 7124 flow [2023-11-19 07:59:12,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=6664, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7124, PETRI_PLACES=276, PETRI_TRANSITIONS=420} [2023-11-19 07:59:12,584 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 256 predicate places. [2023-11-19 07:59:12,584 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 420 transitions, 7124 flow [2023-11-19 07:59:12,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 199.92307692307693) internal successors, (2599), 13 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states 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 07:59:12,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:12,584 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:12,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:12,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-19 07:59:12,785 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:59:12,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:12,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1999741523, now seen corresponding path program 25 times [2023-11-19 07:59:12,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:12,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718054816] [2023-11-19 07:59:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:12,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:12,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:12,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718054816] [2023-11-19 07:59:12,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718054816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:12,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755771468] [2023-11-19 07:59:12,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:59:12,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:12,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:12,869 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:12,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c64396-c42a-42ad-8c7d-ab85eef9f7c4/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-19 07:59:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:12,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:59:12,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:13,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:59:13,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755771468] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:13,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:13,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-19 07:59:13,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468394415] [2023-11-19 07:59:13,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:13,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:59:13,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:13,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:59:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:59:13,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 478 [2023-11-19 07:59:13,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 420 transitions, 7124 flow. Second operand has 13 states, 13 states have (on average 199.92307692307693) internal successors, (2599), 13 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states 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 07:59:13,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:13,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 478 [2023-11-19 07:59:13,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand