./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:14:49,260 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:14:49,445 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:14:49,455 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:14:49,456 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:14:49,507 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:14:49,508 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:14:49,509 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:14:49,510 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:14:49,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:14:49,517 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:14:49,518 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:14:49,519 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:14:49,521 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:14:49,522 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:14:49,522 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:14:49,523 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:14:49,524 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:14:49,524 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:14:49,525 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:14:49,526 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:14:49,526 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:14:49,527 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:14:49,528 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:14:49,528 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:14:49,529 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:14:49,530 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:14:49,531 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:14:49,531 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:14:49,532 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:14:49,534 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:14:49,534 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:14:49,535 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:14:49,535 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:14:49,536 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:14:49,536 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:14:49,536 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:14:49,537 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:14:49,537 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:14:49,538 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_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2023-11-06 22:14:49,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:14:49,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:14:49,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:14:49,884 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:14:49,885 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:14:49,886 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread/stack_longest-2.i [2023-11-06 22:14:53,373 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:14:53,775 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:14:53,775 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/sv-benchmarks/c/pthread/stack_longest-2.i [2023-11-06 22:14:53,810 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/data/2225b7a3f/942d3f0602f64a069ef2e94d729cd618/FLAG8124692ae [2023-11-06 22:14:53,839 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/data/2225b7a3f/942d3f0602f64a069ef2e94d729cd618 [2023-11-06 22:14:53,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:14:53,850 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:14:53,851 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:14:53,852 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:14:53,858 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:14:53,858 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:14:53" (1/1) ... [2023-11-06 22:14:53,859 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60530f8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:53, skipping insertion in model container [2023-11-06 22:14:53,859 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:14:53" (1/1) ... [2023-11-06 22:14:53,928 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:14:54,499 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_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2023-11-06 22:14:54,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:14:54,567 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:14:54,637 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_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2023-11-06 22:14:54,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:14:54,769 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:14:54,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54 WrapperNode [2023-11-06 22:14:54,770 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:14:54,771 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:14:54,772 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:14:54,772 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:14:54,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,805 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,842 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 148 [2023-11-06 22:14:54,842 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:14:54,843 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:14:54,843 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:14:54,844 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:14:54,855 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,861 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,862 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,874 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,878 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,882 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,884 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,889 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:14:54,890 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:14:54,890 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:14:54,891 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:14:54,892 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (1/1) ... [2023-11-06 22:14:54,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:14:54,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:54,939 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:14:54,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:14:54,978 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-06 22:14:54,978 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-06 22:14:54,978 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-06 22:14:54,978 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-06 22:14:54,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:14:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:14:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:14:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:14:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:14:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:14:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:14:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:14:54,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:14:54,981 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:14:55,145 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:14:55,147 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:14:55,562 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:14:55,575 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:14:55,576 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:14:55,579 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:14:55 BoogieIcfgContainer [2023-11-06 22:14:55,579 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:14:55,582 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:14:55,583 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:14:55,586 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:14:55,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:14:53" (1/3) ... [2023-11-06 22:14:55,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f3b980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:14:55, skipping insertion in model container [2023-11-06 22:14:55,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:54" (2/3) ... [2023-11-06 22:14:55,589 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f3b980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:14:55, skipping insertion in model container [2023-11-06 22:14:55,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:14:55" (3/3) ... [2023-11-06 22:14:55,590 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2023-11-06 22:14:55,599 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:14:55,612 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:14:55,613 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-06 22:14:55,613 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:14:55,728 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:14:55,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 159 transitions, 332 flow [2023-11-06 22:14:55,888 INFO L124 PetriNetUnfolderBase]: 10/157 cut-off events. [2023-11-06 22:14:55,888 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:14:55,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 157 events. 10/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 375 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 119. Up to 3 conditions per place. [2023-11-06 22:14:55,897 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 159 transitions, 332 flow [2023-11-06 22:14:55,912 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 147 transitions, 303 flow [2023-11-06 22:14:55,918 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:14:55,945 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 147 transitions, 303 flow [2023-11-06 22:14:55,951 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 147 transitions, 303 flow [2023-11-06 22:14:55,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 147 transitions, 303 flow [2023-11-06 22:14:56,029 INFO L124 PetriNetUnfolderBase]: 10/147 cut-off events. [2023-11-06 22:14:56,029 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:14:56,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 147 events. 10/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 300 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 119. Up to 3 conditions per place. [2023-11-06 22:14:56,040 INFO L119 LiptonReduction]: Number of co-enabled transitions 7432 [2023-11-06 22:15:01,761 INFO L134 LiptonReduction]: Checked pairs total: 10222 [2023-11-06 22:15:01,762 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-11-06 22:15:01,789 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:15:01,800 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=LoopsAndPotentialCycles, 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;@5b045bc9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:15:01,801 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-06 22:15:01,805 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:15:01,805 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-11-06 22:15:01,806 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:15:01,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:01,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:15:01,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:15:01,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:01,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2002758716, now seen corresponding path program 1 times [2023-11-06 22:15:01,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:01,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717030694] [2023-11-06 22:15:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:01,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:02,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:02,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717030694] [2023-11-06 22:15:02,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717030694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:15:02,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:15:02,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:15:02,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964831786] [2023-11-06 22:15:02,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:15:02,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:15:02,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:02,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:15:02,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:15:02,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 305 [2023-11-06 22:15:02,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:02,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:02,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 305 [2023-11-06 22:15:02,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:02,515 INFO L124 PetriNetUnfolderBase]: 539/918 cut-off events. [2023-11-06 22:15:02,515 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-11-06 22:15:02,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 918 events. 539/918 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3449 event pairs, 227 based on Foata normal form. 20/748 useless extension candidates. Maximal degree in co-relation 1680. Up to 573 conditions per place. [2023-11-06 22:15:02,528 INFO L140 encePairwiseOnDemand]: 300/305 looper letters, 46 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-11-06 22:15:02,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 215 flow [2023-11-06 22:15:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:15:02,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:15:02,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-11-06 22:15:02,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5180327868852459 [2023-11-06 22:15:02,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-11-06 22:15:02,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-11-06 22:15:02,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:02,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-11-06 22:15:02,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:02,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:02,573 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:02,576 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 73 flow. Second operand 3 states and 474 transitions. [2023-11-06 22:15:02,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 215 flow [2023-11-06 22:15:02,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 51 transitions, 207 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:15:02,584 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2023-11-06 22:15:02,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-11-06 22:15:02,591 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-11-06 22:15:02,591 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2023-11-06 22:15:02,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:02,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:02,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:02,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:15:02,594 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:15:02,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:02,594 INFO L85 PathProgramCache]: Analyzing trace with hash -827844776, now seen corresponding path program 1 times [2023-11-06 22:15:02,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:02,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60293677] [2023-11-06 22:15:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:02,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:02,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:02,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60293677] [2023-11-06 22:15:02,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60293677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:15:02,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:15:02,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:15:02,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832299478] [2023-11-06 22:15:02,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:15:02,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:15:02,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:02,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:15:02,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:15:02,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 305 [2023-11-06 22:15:02,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:02,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:02,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 305 [2023-11-06 22:15:02,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:03,033 INFO L124 PetriNetUnfolderBase]: 593/1022 cut-off events. [2023-11-06 22:15:03,034 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-11-06 22:15:03,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2144 conditions, 1022 events. 593/1022 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4473 event pairs, 271 based on Foata normal form. 0/866 useless extension candidates. Maximal degree in co-relation 1916. Up to 877 conditions per place. [2023-11-06 22:15:03,043 INFO L140 encePairwiseOnDemand]: 302/305 looper letters, 45 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-11-06 22:15:03,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 50 transitions, 222 flow [2023-11-06 22:15:03,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:15:03,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:15:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-11-06 22:15:03,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5245901639344263 [2023-11-06 22:15:03,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-11-06 22:15:03,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-11-06 22:15:03,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:03,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-11-06 22:15:03,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:03,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:03,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:03,082 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 3 states and 480 transitions. [2023-11-06 22:15:03,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 50 transitions, 222 flow [2023-11-06 22:15:03,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 50 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:15:03,085 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 97 flow [2023-11-06 22:15:03,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2023-11-06 22:15:03,087 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-11-06 22:15:03,087 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 97 flow [2023-11-06 22:15:03,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:03,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:03,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:03,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:15:03,088 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:15:03,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:03,089 INFO L85 PathProgramCache]: Analyzing trace with hash -619458142, now seen corresponding path program 1 times [2023-11-06 22:15:03,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:03,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824880133] [2023-11-06 22:15:03,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:03,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:03,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:03,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824880133] [2023-11-06 22:15:03,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824880133] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:03,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259389764] [2023-11-06 22:15:03,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:03,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:03,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:03,312 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:03,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:15:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:03,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:15:03,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:03,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:03,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259389764] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:03,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:03,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-06 22:15:03,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248322383] [2023-11-06 22:15:03,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:03,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:15:03,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:03,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:15:03,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:15:03,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 305 [2023-11-06 22:15:03,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 97 flow. Second operand has 10 states, 10 states have (on average 139.4) internal successors, (1394), 10 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:03,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:03,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 305 [2023-11-06 22:15:03,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:04,454 INFO L124 PetriNetUnfolderBase]: 1619/2654 cut-off events. [2023-11-06 22:15:04,455 INFO L125 PetriNetUnfolderBase]: For 839/839 co-relation queries the response was YES. [2023-11-06 22:15:04,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6125 conditions, 2654 events. 1619/2654 cut-off events. For 839/839 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 12110 event pairs, 246 based on Foata normal form. 82/2392 useless extension candidates. Maximal degree in co-relation 5686. Up to 795 conditions per place. [2023-11-06 22:15:04,478 INFO L140 encePairwiseOnDemand]: 297/305 looper letters, 155 selfloop transitions, 26 changer transitions 3/184 dead transitions. [2023-11-06 22:15:04,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 184 transitions, 855 flow [2023-11-06 22:15:04,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:15:04,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:15:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1819 transitions. [2023-11-06 22:15:04,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4969945355191257 [2023-11-06 22:15:04,488 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1819 transitions. [2023-11-06 22:15:04,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1819 transitions. [2023-11-06 22:15:04,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:04,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1819 transitions. [2023-11-06 22:15:04,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 151.58333333333334) internal successors, (1819), 12 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:04,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 305.0) internal successors, (3965), 13 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:04,513 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 305.0) internal successors, (3965), 13 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:04,513 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 97 flow. Second operand 12 states and 1819 transitions. [2023-11-06 22:15:04,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 184 transitions, 855 flow [2023-11-06 22:15:04,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 184 transitions, 840 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:15:04,528 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 309 flow [2023-11-06 22:15:04,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=309, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2023-11-06 22:15:04,531 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-11-06 22:15:04,531 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 309 flow [2023-11-06 22:15:04,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 139.4) internal successors, (1394), 10 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:04,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:04,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:04,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:04,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:04,740 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:15:04,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:04,741 INFO L85 PathProgramCache]: Analyzing trace with hash 496137188, now seen corresponding path program 1 times [2023-11-06 22:15:04,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:04,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223457745] [2023-11-06 22:15:04,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:04,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:04,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:04,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223457745] [2023-11-06 22:15:04,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223457745] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:15:04,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:15:04,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:15:04,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861145291] [2023-11-06 22:15:04,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:15:04,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:15:04,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:04,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:15:04,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:15:04,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 305 [2023-11-06 22:15:04,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:04,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:04,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 305 [2023-11-06 22:15:04,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:05,067 INFO L124 PetriNetUnfolderBase]: 512/977 cut-off events. [2023-11-06 22:15:05,067 INFO L125 PetriNetUnfolderBase]: For 557/557 co-relation queries the response was YES. [2023-11-06 22:15:05,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 977 events. 512/977 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4151 event pairs, 98 based on Foata normal form. 0/889 useless extension candidates. Maximal degree in co-relation 2360. Up to 670 conditions per place. [2023-11-06 22:15:05,076 INFO L140 encePairwiseOnDemand]: 300/305 looper letters, 42 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2023-11-06 22:15:05,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 342 flow [2023-11-06 22:15:05,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:15:05,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:15:05,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-11-06 22:15:05,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103825136612021 [2023-11-06 22:15:05,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-11-06 22:15:05,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-11-06 22:15:05,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:05,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-11-06 22:15:05,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:05,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:05,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:05,086 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 309 flow. Second operand 3 states and 467 transitions. [2023-11-06 22:15:05,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 342 flow [2023-11-06 22:15:05,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 321 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-11-06 22:15:05,094 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 216 flow [2023-11-06 22:15:05,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-11-06 22:15:05,095 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2023-11-06 22:15:05,095 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 216 flow [2023-11-06 22:15:05,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:05,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:05,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:05,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:15:05,097 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:15:05,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:05,097 INFO L85 PathProgramCache]: Analyzing trace with hash 74118836, now seen corresponding path program 1 times [2023-11-06 22:15:05,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:05,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355942136] [2023-11-06 22:15:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:05,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:05,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:05,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355942136] [2023-11-06 22:15:05,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355942136] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:15:05,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:15:05,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:15:05,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753362438] [2023-11-06 22:15:05,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:15:05,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:15:05,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:05,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:15:05,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:15:05,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 305 [2023-11-06 22:15:05,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:05,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:05,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 305 [2023-11-06 22:15:05,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:05,433 INFO L124 PetriNetUnfolderBase]: 575/1096 cut-off events. [2023-11-06 22:15:05,433 INFO L125 PetriNetUnfolderBase]: For 447/447 co-relation queries the response was YES. [2023-11-06 22:15:05,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2810 conditions, 1096 events. 575/1096 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 4630 event pairs, 353 based on Foata normal form. 24/1120 useless extension candidates. Maximal degree in co-relation 2270. Up to 773 conditions per place. [2023-11-06 22:15:05,444 INFO L140 encePairwiseOnDemand]: 299/305 looper letters, 50 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2023-11-06 22:15:05,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 367 flow [2023-11-06 22:15:05,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:15:05,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:15:05,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-11-06 22:15:05,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158469945355191 [2023-11-06 22:15:05,447 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-11-06 22:15:05,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-11-06 22:15:05,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:05,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-11-06 22:15:05,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:05,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:05,454 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:05,454 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 216 flow. Second operand 3 states and 472 transitions. [2023-11-06 22:15:05,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 367 flow [2023-11-06 22:15:05,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 359 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:15:05,460 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 248 flow [2023-11-06 22:15:05,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-11-06 22:15:05,461 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2023-11-06 22:15:05,461 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 248 flow [2023-11-06 22:15:05,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:05,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:05,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:05,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:15:05,462 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:15:05,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:05,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1624983047, now seen corresponding path program 1 times [2023-11-06 22:15:05,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:05,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633424865] [2023-11-06 22:15:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:05,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:06,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:06,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633424865] [2023-11-06 22:15:06,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633424865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:15:06,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:15:06,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 22:15:06,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824866129] [2023-11-06 22:15:06,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:15:06,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:15:06,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:06,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:15:06,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:15:06,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 305 [2023-11-06 22:15:06,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 248 flow. Second operand has 11 states, 11 states have (on average 123.81818181818181) internal successors, (1362), 11 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:06,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:06,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 305 [2023-11-06 22:15:06,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:07,751 INFO L124 PetriNetUnfolderBase]: 808/1544 cut-off events. [2023-11-06 22:15:07,751 INFO L125 PetriNetUnfolderBase]: For 1167/1167 co-relation queries the response was YES. [2023-11-06 22:15:07,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3961 conditions, 1544 events. 808/1544 cut-off events. For 1167/1167 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 7398 event pairs, 255 based on Foata normal form. 0/1526 useless extension candidates. Maximal degree in co-relation 2318. Up to 882 conditions per place. [2023-11-06 22:15:07,765 INFO L140 encePairwiseOnDemand]: 295/305 looper letters, 79 selfloop transitions, 11 changer transitions 14/113 dead transitions. [2023-11-06 22:15:07,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 113 transitions, 670 flow [2023-11-06 22:15:07,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:15:07,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:15:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1189 transitions. [2023-11-06 22:15:07,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331511839708561 [2023-11-06 22:15:07,772 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1189 transitions. [2023-11-06 22:15:07,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1189 transitions. [2023-11-06 22:15:07,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:07,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1189 transitions. [2023-11-06 22:15:07,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:07,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 305.0) internal successors, (3050), 10 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:07,787 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 305.0) internal successors, (3050), 10 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:07,787 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 248 flow. Second operand 9 states and 1189 transitions. [2023-11-06 22:15:07,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 113 transitions, 670 flow [2023-11-06 22:15:07,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 113 transitions, 632 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-06 22:15:07,796 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 315 flow [2023-11-06 22:15:07,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=315, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-11-06 22:15:07,801 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2023-11-06 22:15:07,801 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 315 flow [2023-11-06 22:15:07,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 123.81818181818181) internal successors, (1362), 11 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:07,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:07,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:07,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:15:07,803 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:15:07,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:07,804 INFO L85 PathProgramCache]: Analyzing trace with hash -91579103, now seen corresponding path program 2 times [2023-11-06 22:15:07,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:07,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003615968] [2023-11-06 22:15:07,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:07,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:08,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:08,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003615968] [2023-11-06 22:15:08,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003615968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:15:08,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:15:08,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 22:15:08,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352506925] [2023-11-06 22:15:08,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:15:08,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:15:08,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:08,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:15:08,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:15:09,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 305 [2023-11-06 22:15:09,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 315 flow. Second operand has 11 states, 11 states have (on average 123.81818181818181) internal successors, (1362), 11 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:09,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:09,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 305 [2023-11-06 22:15:09,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:10,413 INFO L124 PetriNetUnfolderBase]: 1026/1951 cut-off events. [2023-11-06 22:15:10,413 INFO L125 PetriNetUnfolderBase]: For 1279/1279 co-relation queries the response was YES. [2023-11-06 22:15:10,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5302 conditions, 1951 events. 1026/1951 cut-off events. For 1279/1279 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 9758 event pairs, 341 based on Foata normal form. 0/1928 useless extension candidates. Maximal degree in co-relation 4001. Up to 831 conditions per place. [2023-11-06 22:15:10,433 INFO L140 encePairwiseOnDemand]: 296/305 looper letters, 79 selfloop transitions, 16 changer transitions 14/118 dead transitions. [2023-11-06 22:15:10,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 118 transitions, 736 flow [2023-11-06 22:15:10,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:15:10,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:15:10,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1189 transitions. [2023-11-06 22:15:10,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331511839708561 [2023-11-06 22:15:10,440 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1189 transitions. [2023-11-06 22:15:10,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1189 transitions. [2023-11-06 22:15:10,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:10,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1189 transitions. [2023-11-06 22:15:10,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:10,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 305.0) internal successors, (3050), 10 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:10,455 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 305.0) internal successors, (3050), 10 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:10,455 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 315 flow. Second operand 9 states and 1189 transitions. [2023-11-06 22:15:10,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 118 transitions, 736 flow [2023-11-06 22:15:10,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 118 transitions, 736 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:15:10,468 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 417 flow [2023-11-06 22:15:10,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=417, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2023-11-06 22:15:10,469 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 41 predicate places. [2023-11-06 22:15:10,470 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 417 flow [2023-11-06 22:15:10,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 123.81818181818181) internal successors, (1362), 11 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:10,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:10,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:10,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:15:10,472 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:15:10,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:10,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1187704404, now seen corresponding path program 1 times [2023-11-06 22:15:10,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:10,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137491337] [2023-11-06 22:15:10,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:10,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:10,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:10,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137491337] [2023-11-06 22:15:10,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137491337] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:10,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915391905] [2023-11-06 22:15:10,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:10,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:10,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:10,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:10,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:15:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:10,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:15:10,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:15:10,916 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:15:10,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915391905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:15:10,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:15:10,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-06 22:15:10,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994763680] [2023-11-06 22:15:10,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:15:10,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:15:10,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:10,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:15:10,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:15:10,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 305 [2023-11-06 22:15:10,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 417 flow. Second operand has 6 states, 6 states have (on average 136.83333333333334) internal successors, (821), 6 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:10,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:10,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 305 [2023-11-06 22:15:10,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:11,520 INFO L124 PetriNetUnfolderBase]: 1110/2059 cut-off events. [2023-11-06 22:15:11,521 INFO L125 PetriNetUnfolderBase]: For 2061/2061 co-relation queries the response was YES. [2023-11-06 22:15:11,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5937 conditions, 2059 events. 1110/2059 cut-off events. For 2061/2061 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 9860 event pairs, 421 based on Foata normal form. 34/2073 useless extension candidates. Maximal degree in co-relation 4731. Up to 781 conditions per place. [2023-11-06 22:15:11,545 INFO L140 encePairwiseOnDemand]: 297/305 looper letters, 99 selfloop transitions, 16 changer transitions 0/115 dead transitions. [2023-11-06 22:15:11,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 115 transitions, 847 flow [2023-11-06 22:15:11,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:15:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:15:11,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 882 transitions. [2023-11-06 22:15:11,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4819672131147541 [2023-11-06 22:15:11,552 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 882 transitions. [2023-11-06 22:15:11,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 882 transitions. [2023-11-06 22:15:11,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:11,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 882 transitions. [2023-11-06 22:15:11,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:11,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:11,563 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:11,564 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 417 flow. Second operand 6 states and 882 transitions. [2023-11-06 22:15:11,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 115 transitions, 847 flow [2023-11-06 22:15:11,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 820 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-06 22:15:11,580 INFO L231 Difference]: Finished difference. Result has 79 places, 69 transitions, 499 flow [2023-11-06 22:15:11,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=499, PETRI_PLACES=79, PETRI_TRANSITIONS=69} [2023-11-06 22:15:11,585 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 45 predicate places. [2023-11-06 22:15:11,585 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 499 flow [2023-11-06 22:15:11,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 136.83333333333334) internal successors, (821), 6 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:11,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:11,586 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-11-06 22:15:11,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:11,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:11,798 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:15:11,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:11,800 INFO L85 PathProgramCache]: Analyzing trace with hash -259020702, now seen corresponding path program 2 times [2023-11-06 22:15:11,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:11,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311436136] [2023-11-06 22:15:11,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:11,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:12,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:12,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311436136] [2023-11-06 22:15:12,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311436136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:12,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936789459] [2023-11-06 22:15:12,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:15:12,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:12,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:12,190 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:12,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:15:12,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:15:12,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:15:12,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:15:12,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:12,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:12,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936789459] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:12,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:12,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2023-11-06 22:15:12,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297733188] [2023-11-06 22:15:12,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:12,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:15:12,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:12,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:15:12,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:15:12,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 305 [2023-11-06 22:15:12,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 499 flow. Second operand has 20 states, 20 states have (on average 135.3) internal successors, (2706), 20 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:12,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:12,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 305 [2023-11-06 22:15:12,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:13,962 INFO L124 PetriNetUnfolderBase]: 1558/2883 cut-off events. [2023-11-06 22:15:13,962 INFO L125 PetriNetUnfolderBase]: For 4079/4079 co-relation queries the response was YES. [2023-11-06 22:15:13,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8718 conditions, 2883 events. 1558/2883 cut-off events. For 4079/4079 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 12989 event pairs, 344 based on Foata normal form. 32/2895 useless extension candidates. Maximal degree in co-relation 7739. Up to 936 conditions per place. [2023-11-06 22:15:13,996 INFO L140 encePairwiseOnDemand]: 297/305 looper letters, 214 selfloop transitions, 43 changer transitions 6/263 dead transitions. [2023-11-06 22:15:13,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 263 transitions, 1818 flow [2023-11-06 22:15:13,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:15:13,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:15:14,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3012 transitions. [2023-11-06 22:15:14,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702576112412178 [2023-11-06 22:15:14,011 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3012 transitions. [2023-11-06 22:15:14,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3012 transitions. [2023-11-06 22:15:14,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:14,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3012 transitions. [2023-11-06 22:15:14,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 143.42857142857142) internal successors, (3012), 21 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:14,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:14,044 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:14,044 INFO L175 Difference]: Start difference. First operand has 79 places, 69 transitions, 499 flow. Second operand 21 states and 3012 transitions. [2023-11-06 22:15:14,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 263 transitions, 1818 flow [2023-11-06 22:15:14,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 263 transitions, 1794 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-11-06 22:15:14,069 INFO L231 Difference]: Finished difference. Result has 110 places, 96 transitions, 866 flow [2023-11-06 22:15:14,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=866, PETRI_PLACES=110, PETRI_TRANSITIONS=96} [2023-11-06 22:15:14,071 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 76 predicate places. [2023-11-06 22:15:14,071 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 96 transitions, 866 flow [2023-11-06 22:15:14,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 135.3) internal successors, (2706), 20 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:14,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:14,073 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:14,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:14,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:14,281 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:15:14,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:14,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1589662127, now seen corresponding path program 3 times [2023-11-06 22:15:14,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:14,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134900137] [2023-11-06 22:15:14,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:14,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:15:15,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:15,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134900137] [2023-11-06 22:15:15,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134900137] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:15:15,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:15:15,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-06 22:15:15,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864741438] [2023-11-06 22:15:15,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:15:15,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:15:15,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:15,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:15:15,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:15:17,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 305 [2023-11-06 22:15:17,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 96 transitions, 866 flow. Second operand has 15 states, 15 states have (on average 114.86666666666666) internal successors, (1723), 15 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:17,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:17,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 305 [2023-11-06 22:15:17,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:20,111 INFO L124 PetriNetUnfolderBase]: 2453/4577 cut-off events. [2023-11-06 22:15:20,111 INFO L125 PetriNetUnfolderBase]: For 8407/8407 co-relation queries the response was YES. [2023-11-06 22:15:20,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15480 conditions, 4577 events. 2453/4577 cut-off events. For 8407/8407 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 23406 event pairs, 665 based on Foata normal form. 0/4552 useless extension candidates. Maximal degree in co-relation 14271. Up to 1275 conditions per place. [2023-11-06 22:15:20,173 INFO L140 encePairwiseOnDemand]: 287/305 looper letters, 118 selfloop transitions, 125 changer transitions 1/254 dead transitions. [2023-11-06 22:15:20,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 254 transitions, 2272 flow [2023-11-06 22:15:20,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:15:20,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:15:20,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2848 transitions. [2023-11-06 22:15:20,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38907103825136613 [2023-11-06 22:15:20,189 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2848 transitions. [2023-11-06 22:15:20,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2848 transitions. [2023-11-06 22:15:20,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:20,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2848 transitions. [2023-11-06 22:15:20,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 118.66666666666667) internal successors, (2848), 24 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:20,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 305.0) internal successors, (7625), 25 states have internal predecessors, (7625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:20,237 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 305.0) internal successors, (7625), 25 states have internal predecessors, (7625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:20,237 INFO L175 Difference]: Start difference. First operand has 110 places, 96 transitions, 866 flow. Second operand 24 states and 2848 transitions. [2023-11-06 22:15:20,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 254 transitions, 2272 flow [2023-11-06 22:15:20,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 254 transitions, 2046 flow, removed 80 selfloop flow, removed 9 redundant places. [2023-11-06 22:15:20,396 INFO L231 Difference]: Finished difference. Result has 131 places, 176 transitions, 1726 flow [2023-11-06 22:15:20,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1726, PETRI_PLACES=131, PETRI_TRANSITIONS=176} [2023-11-06 22:15:20,398 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 97 predicate places. [2023-11-06 22:15:20,398 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 176 transitions, 1726 flow [2023-11-06 22:15:20,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 114.86666666666666) internal successors, (1723), 15 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:20,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:20,404 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:20,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:15:20,409 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:15:20,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:20,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1490853661, now seen corresponding path program 4 times [2023-11-06 22:15:20,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:20,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269870801] [2023-11-06 22:15:20,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:20,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:15:21,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:21,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269870801] [2023-11-06 22:15:21,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269870801] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:21,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708438505] [2023-11-06 22:15:21,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:15:21,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:21,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:21,623 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:21,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:15:21,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:15:21,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:15:21,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-06 22:15:21,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:22,432 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:15:22,509 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-06 22:15:23,146 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-11-06 22:15:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:23,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:24,053 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2023-11-06 22:15:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:24,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708438505] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:24,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:24,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 46 [2023-11-06 22:15:24,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296612551] [2023-11-06 22:15:24,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:24,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-06 22:15:24,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:24,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-06 22:15:24,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2102, Unknown=0, NotChecked=0, Total=2256 [2023-11-06 22:15:33,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 305 [2023-11-06 22:15:33,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 176 transitions, 1726 flow. Second operand has 48 states, 48 states have (on average 104.75) internal successors, (5028), 48 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:33,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:15:33,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 305 [2023-11-06 22:15:33,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:15:45,650 INFO L124 PetriNetUnfolderBase]: 3058/5688 cut-off events. [2023-11-06 22:15:45,650 INFO L125 PetriNetUnfolderBase]: For 13141/13141 co-relation queries the response was YES. [2023-11-06 22:15:45,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20898 conditions, 5688 events. 3058/5688 cut-off events. For 13141/13141 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 30911 event pairs, 365 based on Foata normal form. 44/5707 useless extension candidates. Maximal degree in co-relation 16132. Up to 1191 conditions per place. [2023-11-06 22:15:45,733 INFO L140 encePairwiseOnDemand]: 287/305 looper letters, 322 selfloop transitions, 221 changer transitions 15/558 dead transitions. [2023-11-06 22:15:45,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 558 transitions, 4566 flow [2023-11-06 22:15:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-06 22:15:45,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-11-06 22:15:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 7620 transitions. [2023-11-06 22:15:45,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35690866510538644 [2023-11-06 22:15:45,761 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 7620 transitions. [2023-11-06 22:15:45,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 7620 transitions. [2023-11-06 22:15:45,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:15:45,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 7620 transitions. [2023-11-06 22:15:45,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 108.85714285714286) internal successors, (7620), 70 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:45,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 305.0) internal successors, (21655), 71 states have internal predecessors, (21655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:45,828 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 305.0) internal successors, (21655), 71 states have internal predecessors, (21655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:45,828 INFO L175 Difference]: Start difference. First operand has 131 places, 176 transitions, 1726 flow. Second operand 70 states and 7620 transitions. [2023-11-06 22:15:45,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 558 transitions, 4566 flow [2023-11-06 22:15:45,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 558 transitions, 4443 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-11-06 22:15:45,968 INFO L231 Difference]: Finished difference. Result has 203 places, 271 transitions, 3091 flow [2023-11-06 22:15:45,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=1655, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=3091, PETRI_PLACES=203, PETRI_TRANSITIONS=271} [2023-11-06 22:15:45,975 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 169 predicate places. [2023-11-06 22:15:45,976 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 271 transitions, 3091 flow [2023-11-06 22:15:45,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 104.75) internal successors, (5028), 48 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:45,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:15:45,983 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:45,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:46,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:46,191 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:15:46,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:46,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1591633528, now seen corresponding path program 1 times [2023-11-06 22:15:46,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:46,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706330791] [2023-11-06 22:15:46,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:46,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:47,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:47,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706330791] [2023-11-06 22:15:47,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706330791] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:47,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766484736] [2023-11-06 22:15:47,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:47,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:47,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:47,927 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:47,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:15:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:48,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-06 22:15:48,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:48,397 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:15:48,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:15:48,871 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 19 [2023-11-06 22:15:49,511 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2023-11-06 22:15:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:49,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:51,714 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-11-06 22:15:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:15:52,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766484736] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:52,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:15:52,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2023-11-06 22:15:52,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739645762] [2023-11-06 22:15:52,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:52,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-06 22:15:52,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:52,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-06 22:15:52,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3118, Unknown=0, NotChecked=0, Total=3306 [2023-11-06 22:15:59,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:16:02,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:16:07,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:16:08,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:16:18,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:16:20,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:16:21,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 305 [2023-11-06 22:16:21,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 271 transitions, 3091 flow. Second operand has 58 states, 58 states have (on average 108.86206896551724) internal successors, (6314), 58 states have internal predecessors, (6314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:21,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:21,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 305 [2023-11-06 22:16:21,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:16:36,576 INFO L124 PetriNetUnfolderBase]: 5679/10653 cut-off events. [2023-11-06 22:16:36,576 INFO L125 PetriNetUnfolderBase]: For 25930/25940 co-relation queries the response was YES. [2023-11-06 22:16:36,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41856 conditions, 10653 events. 5679/10653 cut-off events. For 25930/25940 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 68543 event pairs, 807 based on Foata normal form. 12/10612 useless extension candidates. Maximal degree in co-relation 39439. Up to 1865 conditions per place. [2023-11-06 22:16:36,722 INFO L140 encePairwiseOnDemand]: 287/305 looper letters, 360 selfloop transitions, 434 changer transitions 16/820 dead transitions. [2023-11-06 22:16:36,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 820 transitions, 8423 flow [2023-11-06 22:16:36,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-11-06 22:16:36,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2023-11-06 22:16:36,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 9218 transitions. [2023-11-06 22:16:36,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36857257097161134 [2023-11-06 22:16:36,743 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 9218 transitions. [2023-11-06 22:16:36,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 9218 transitions. [2023-11-06 22:16:36,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:16:36,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 9218 transitions. [2023-11-06 22:16:36,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 112.41463414634147) internal successors, (9218), 82 states have internal predecessors, (9218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:36,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 305.0) internal successors, (25315), 83 states have internal predecessors, (25315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:36,803 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 305.0) internal successors, (25315), 83 states have internal predecessors, (25315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:36,803 INFO L175 Difference]: Start difference. First operand has 203 places, 271 transitions, 3091 flow. Second operand 82 states and 9218 transitions. [2023-11-06 22:16:36,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 820 transitions, 8423 flow [2023-11-06 22:16:37,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 820 transitions, 7498 flow, removed 359 selfloop flow, removed 14 redundant places. [2023-11-06 22:16:37,159 INFO L231 Difference]: Finished difference. Result has 279 places, 506 transitions, 6067 flow [2023-11-06 22:16:37,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=2641, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=6067, PETRI_PLACES=279, PETRI_TRANSITIONS=506} [2023-11-06 22:16:37,161 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 245 predicate places. [2023-11-06 22:16:37,162 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 506 transitions, 6067 flow [2023-11-06 22:16:37,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 108.86206896551724) internal successors, (6314), 58 states have internal predecessors, (6314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:37,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:16:37,163 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:37,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:37,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:16:37,370 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:16:37,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:37,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1533863136, now seen corresponding path program 2 times [2023-11-06 22:16:37,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:37,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500745769] [2023-11-06 22:16:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:37,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:39,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:39,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500745769] [2023-11-06 22:16:39,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500745769] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:39,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207949361] [2023-11-06 22:16:39,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:16:39,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:39,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:39,770 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:39,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:16:39,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:16:39,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:16:39,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-06 22:16:39,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:40,028 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-06 22:16:40,028 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-11-06 22:16:40,344 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:16:40,467 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2023-11-06 22:16:40,826 INFO L322 Elim1Store]: treesize reduction 35, result has 41.7 percent of original size [2023-11-06 22:16:40,827 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 32 [2023-11-06 22:16:41,706 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2023-11-06 22:16:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:41,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:43,671 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:16:43,672 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-11-06 22:16:43,684 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:16:43,684 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-11-06 22:16:43,691 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-11-06 22:16:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:44,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207949361] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:44,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:16:44,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 19] total 63 [2023-11-06 22:16:44,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424083257] [2023-11-06 22:16:44,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:44,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-06 22:16:44,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:44,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-06 22:16:44,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3915, Unknown=15, NotChecked=0, Total=4160 [2023-11-06 22:16:51,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 305 [2023-11-06 22:16:51,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 506 transitions, 6067 flow. Second operand has 65 states, 65 states have (on average 89.66153846153846) internal successors, (5828), 65 states have internal predecessors, (5828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:51,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:16:51,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 305 [2023-11-06 22:16:51,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:11,743 INFO L124 PetriNetUnfolderBase]: 7504/13936 cut-off events. [2023-11-06 22:17:11,744 INFO L125 PetriNetUnfolderBase]: For 32296/32296 co-relation queries the response was YES. [2023-11-06 22:17:11,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56446 conditions, 13936 events. 7504/13936 cut-off events. For 32296/32296 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 90001 event pairs, 783 based on Foata normal form. 6/13877 useless extension candidates. Maximal degree in co-relation 51089. Up to 2484 conditions per place. [2023-11-06 22:17:11,934 INFO L140 encePairwiseOnDemand]: 286/305 looper letters, 318 selfloop transitions, 780 changer transitions 20/1118 dead transitions. [2023-11-06 22:17:11,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1118 transitions, 12992 flow [2023-11-06 22:17:11,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-11-06 22:17:11,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2023-11-06 22:17:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 8720 transitions. [2023-11-06 22:17:11,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3041506801534705 [2023-11-06 22:17:11,971 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 8720 transitions. [2023-11-06 22:17:11,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 8720 transitions. [2023-11-06 22:17:11,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:11,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 8720 transitions. [2023-11-06 22:17:12,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 92.76595744680851) internal successors, (8720), 94 states have internal predecessors, (8720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:12,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 305.0) internal successors, (28975), 95 states have internal predecessors, (28975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:12,053 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 305.0) internal successors, (28975), 95 states have internal predecessors, (28975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:12,054 INFO L175 Difference]: Start difference. First operand has 279 places, 506 transitions, 6067 flow. Second operand 94 states and 8720 transitions. [2023-11-06 22:17:12,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1118 transitions, 12992 flow [2023-11-06 22:17:12,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1118 transitions, 12495 flow, removed 80 selfloop flow, removed 14 redundant places. [2023-11-06 22:17:12,549 INFO L231 Difference]: Finished difference. Result has 365 places, 827 transitions, 11264 flow [2023-11-06 22:17:12,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=5752, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=460, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=11264, PETRI_PLACES=365, PETRI_TRANSITIONS=827} [2023-11-06 22:17:12,550 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 331 predicate places. [2023-11-06 22:17:12,551 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 827 transitions, 11264 flow [2023-11-06 22:17:12,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 89.66153846153846) internal successors, (5828), 65 states have internal predecessors, (5828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:12,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:12,552 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:12,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:12,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:17:12,753 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:17:12,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:12,754 INFO L85 PathProgramCache]: Analyzing trace with hash -911949100, now seen corresponding path program 2 times [2023-11-06 22:17:12,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:12,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380553065] [2023-11-06 22:17:12,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:12,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:17:13,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:13,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380553065] [2023-11-06 22:17:13,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380553065] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:13,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486511178] [2023-11-06 22:17:13,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:17:13,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:13,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:13,176 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:13,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:17:13,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:17:13,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:17:13,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:17:13,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:17:13,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:17:13,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486511178] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:13,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:17:13,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-11-06 22:17:13,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839557254] [2023-11-06 22:17:13,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:13,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:17:13,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:13,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:17:13,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:17:14,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-11-06 22:17:14,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 827 transitions, 11264 flow. Second operand has 22 states, 22 states have (on average 131.04545454545453) internal successors, (2883), 22 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:14,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:17:14,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-11-06 22:17:14,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:17:20,224 INFO L124 PetriNetUnfolderBase]: 8486/15804 cut-off events. [2023-11-06 22:17:20,224 INFO L125 PetriNetUnfolderBase]: For 50289/50289 co-relation queries the response was YES. [2023-11-06 22:17:20,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70819 conditions, 15804 events. 8486/15804 cut-off events. For 50289/50289 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 104197 event pairs, 1714 based on Foata normal form. 100/15867 useless extension candidates. Maximal degree in co-relation 63859. Up to 2873 conditions per place. [2023-11-06 22:17:20,465 INFO L140 encePairwiseOnDemand]: 295/305 looper letters, 688 selfloop transitions, 561 changer transitions 12/1261 dead transitions. [2023-11-06 22:17:20,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1261 transitions, 18091 flow [2023-11-06 22:17:20,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:17:20,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 22:17:20,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3672 transitions. [2023-11-06 22:17:20,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4459016393442623 [2023-11-06 22:17:20,474 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3672 transitions. [2023-11-06 22:17:20,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3672 transitions. [2023-11-06 22:17:20,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:17:20,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3672 transitions. [2023-11-06 22:17:20,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 136.0) internal successors, (3672), 27 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:20,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 305.0) internal successors, (8540), 28 states have internal predecessors, (8540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:20,496 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 305.0) internal successors, (8540), 28 states have internal predecessors, (8540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:20,496 INFO L175 Difference]: Start difference. First operand has 365 places, 827 transitions, 11264 flow. Second operand 27 states and 3672 transitions. [2023-11-06 22:17:20,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1261 transitions, 18091 flow [2023-11-06 22:17:21,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 1261 transitions, 17156 flow, removed 324 selfloop flow, removed 9 redundant places. [2023-11-06 22:17:21,281 INFO L231 Difference]: Finished difference. Result has 388 places, 908 transitions, 13474 flow [2023-11-06 22:17:21,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=10309, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=456, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=13474, PETRI_PLACES=388, PETRI_TRANSITIONS=908} [2023-11-06 22:17:21,283 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 354 predicate places. [2023-11-06 22:17:21,283 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 908 transitions, 13474 flow [2023-11-06 22:17:21,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 131.04545454545453) internal successors, (2883), 22 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:21,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:21,284 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:21,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:21,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:17:21,491 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:17:21,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:21,492 INFO L85 PathProgramCache]: Analyzing trace with hash -492616137, now seen corresponding path program 3 times [2023-11-06 22:17:21,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:21,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688742508] [2023-11-06 22:17:21,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:21,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:21,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:21,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688742508] [2023-11-06 22:17:21,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688742508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:21,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337868173] [2023-11-06 22:17:21,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:17:21,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:21,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:21,995 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:22,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d18727cf-0ef8-44fd-a7e3-f39a548aec3d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:17:22,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:17:22,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:17:22,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 85 conjunts are in the unsatisfiable core [2023-11-06 22:17:22,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:22,290 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-06 22:17:22,291 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-11-06 22:17:22,299 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-11-06 22:17:22,362 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-06 22:17:22,660 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-11-06 22:17:23,209 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 56 [2023-11-06 22:17:27,218 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 180 [2023-11-06 22:17:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:17:28,968 INFO L327 TraceCheckSpWp]: Computing backward predicates...