./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:54:53,264 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:54:53,379 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:54:53,387 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:54:53,388 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:54:53,436 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:54:53,437 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:54:53,438 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:54:53,439 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:54:53,444 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:54:53,445 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:54:53,445 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:54:53,446 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:54:53,447 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:54:53,448 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:54:53,448 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:54:53,449 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:54:53,449 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:54:53,449 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:54:53,450 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:54:53,450 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:54:53,451 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:54:53,451 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:54:53,452 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:54:53,452 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:54:53,453 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:54:53,454 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:54:53,454 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:54:53,454 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:53,455 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:54:53,456 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:54:53,457 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:54:53,457 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:54:53,457 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:54:53,457 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:54:53,458 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:54:53,458 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:54:53,458 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:54:53,458 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:54:53,459 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_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2023-11-19 07:54:53,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:54:53,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:54:53,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:54:53,755 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:54:53,755 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:54:53,757 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2023-11-19 07:54:56,851 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:54:57,068 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:54:57,069 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2023-11-19 07:54:57,078 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/data/4e41271b2/327ef3f28a6a4019b7a1fe4b77a01511/FLAG3798ada40 [2023-11-19 07:54:57,436 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/data/4e41271b2/327ef3f28a6a4019b7a1fe4b77a01511 [2023-11-19 07:54:57,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:54:57,445 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:54:57,446 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:57,447 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:54:57,453 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:54:57,454 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:57" (1/1) ... [2023-11-19 07:54:57,455 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@220732a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:57, skipping insertion in model container [2023-11-19 07:54:57,455 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:57" (1/1) ... [2023-11-19 07:54:57,481 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:54:57,664 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_8da40ec9-48bb-4621-bb70-65e62d11de93/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2508,2521] [2023-11-19 07:54:57,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:54:57,702 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:54:57,726 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_8da40ec9-48bb-4621-bb70-65e62d11de93/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2508,2521] [2023-11-19 07:54:57,731 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:54:57,752 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:54:57,753 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:57 WrapperNode [2023-11-19 07:54:57,753 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:57,755 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:54:57,756 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:54:57,756 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:54:57,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:57" (1/1) ... [2023-11-19 07:54:57,792 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:57" (1/1) ... [2023-11-19 07:54:57,839 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 205 [2023-11-19 07:54:57,841 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:54:57,842 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:54:57,842 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:54:57,842 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:54:57,852 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:57" (1/1) ... [2023-11-19 07:54:57,853 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:57" (1/1) ... [2023-11-19 07:54:57,871 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:57" (1/1) ... [2023-11-19 07:54:57,871 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:57" (1/1) ... [2023-11-19 07:54:57,880 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:57" (1/1) ... [2023-11-19 07:54:57,895 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:57" (1/1) ... [2023-11-19 07:54:57,898 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:57" (1/1) ... [2023-11-19 07:54:57,900 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:57" (1/1) ... [2023-11-19 07:54:57,909 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:54:57,911 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:54:57,911 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:54:57,912 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:54:57,913 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:57" (1/1) ... [2023-11-19 07:54:57,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:57,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:57,944 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:54:57,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:54:57,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:54:57,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:54:57,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:54:57,996 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:54:57,996 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:54:57,997 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:54:57,997 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:54:57,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:54:57,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:54:58,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:54:58,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:54:58,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:54:58,010 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:54:57,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:54:58,140 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:54:58,142 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:54:58,610 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:54:58,624 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:54:58,624 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 07:54:58,639 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:58 BoogieIcfgContainer [2023-11-19 07:54:58,640 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:54:58,643 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:54:58,643 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:54:58,646 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:54:58,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:54:57" (1/3) ... [2023-11-19 07:54:58,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f353b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:58, skipping insertion in model container [2023-11-19 07:54:58,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:57" (2/3) ... [2023-11-19 07:54:58,651 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f353b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:58, skipping insertion in model container [2023-11-19 07:54:58,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:58" (3/3) ... [2023-11-19 07:54:58,652 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2023-11-19 07:54:58,663 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:54:58,671 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:54:58,671 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:54:58,671 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:54:58,790 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:54:58,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 262 transitions, 538 flow [2023-11-19 07:54:58,966 INFO L124 PetriNetUnfolderBase]: 21/260 cut-off events. [2023-11-19 07:54:58,966 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:54:58,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 260 events. 21/260 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 352 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 168. Up to 3 conditions per place. [2023-11-19 07:54:58,979 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 262 transitions, 538 flow [2023-11-19 07:54:58,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 251 transitions, 514 flow [2023-11-19 07:54:58,998 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:54:59,014 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 251 transitions, 514 flow [2023-11-19 07:54:59,018 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 251 transitions, 514 flow [2023-11-19 07:54:59,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 251 transitions, 514 flow [2023-11-19 07:54:59,102 INFO L124 PetriNetUnfolderBase]: 21/251 cut-off events. [2023-11-19 07:54:59,102 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:54:59,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 251 events. 21/251 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 351 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 168. Up to 3 conditions per place. [2023-11-19 07:54:59,111 INFO L119 LiptonReduction]: Number of co-enabled transitions 6732 [2023-11-19 07:55:07,011 INFO L134 LiptonReduction]: Checked pairs total: 6625 [2023-11-19 07:55:07,011 INFO L136 LiptonReduction]: Total number of compositions: 286 [2023-11-19 07:55:07,035 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:07,045 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@179c9bf0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:07,046 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:55:07,053 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:55:07,053 INFO L124 PetriNetUnfolderBase]: 5/22 cut-off events. [2023-11-19 07:55:07,054 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:55:07,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:07,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:07,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:55:07,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:07,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1576049998, now seen corresponding path program 1 times [2023-11-19 07:55:07,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:07,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216501244] [2023-11-19 07:55:07,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:07,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:08,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:08,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216501244] [2023-11-19 07:55:08,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216501244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:08,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:08,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:55:08,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496738821] [2023-11-19 07:55:08,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:08,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:55:08,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:08,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:55:08,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:55:08,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 548 [2023-11-19 07:55:08,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 8 states, 8 states have (on average 219.875) internal successors, (1759), 8 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:08,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:08,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 548 [2023-11-19 07:55:08,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:09,144 INFO L124 PetriNetUnfolderBase]: 156/289 cut-off events. [2023-11-19 07:55:09,144 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 07:55:09,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 289 events. 156/289 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 987 event pairs, 35 based on Foata normal form. 1/240 useless extension candidates. Maximal degree in co-relation 256. Up to 134 conditions per place. [2023-11-19 07:55:09,152 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 52 selfloop transitions, 11 changer transitions 7/70 dead transitions. [2023-11-19 07:55:09,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 70 transitions, 322 flow [2023-11-19 07:55:09,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:55:09,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:55:09,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2035 transitions. [2023-11-19 07:55:09,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41261151662611517 [2023-11-19 07:55:09,187 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2035 transitions. [2023-11-19 07:55:09,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2035 transitions. [2023-11-19 07:55:09,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:09,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2035 transitions. [2023-11-19 07:55:09,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 226.11111111111111) internal successors, (2035), 9 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:09,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:09,228 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:09,230 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 9 states and 2035 transitions. [2023-11-19 07:55:09,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 70 transitions, 322 flow [2023-11-19 07:55:09,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 70 transitions, 294 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:55:09,239 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 126 flow [2023-11-19 07:55:09,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=126, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-11-19 07:55:09,246 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 9 predicate places. [2023-11-19 07:55:09,246 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 126 flow [2023-11-19 07:55:09,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 219.875) internal successors, (1759), 8 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:09,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:09,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:09,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:55:09,249 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:55:09,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:09,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1186943890, now seen corresponding path program 1 times [2023-11-19 07:55:09,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:09,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816368022] [2023-11-19 07:55:09,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:09,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:09,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:09,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816368022] [2023-11-19 07:55:09,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816368022] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:09,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959536291] [2023-11-19 07:55:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:09,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:09,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:09,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:09,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:55:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:09,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:55:09,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:10,338 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:55:10,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 108 [2023-11-19 07:55:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:10,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:10,622 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:55:10,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 125 [2023-11-19 07:55:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:10,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959536291] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:10,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:10,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2023-11-19 07:55:10,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476230816] [2023-11-19 07:55:10,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:10,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:55:10,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:10,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:55:10,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:55:11,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 548 [2023-11-19 07:55:11,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 126 flow. Second operand has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:11,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:11,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 548 [2023-11-19 07:55:11,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:11,517 INFO L124 PetriNetUnfolderBase]: 272/504 cut-off events. [2023-11-19 07:55:11,518 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2023-11-19 07:55:11,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1240 conditions, 504 events. 272/504 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2077 event pairs, 116 based on Foata normal form. 13/458 useless extension candidates. Maximal degree in co-relation 1051. Up to 145 conditions per place. [2023-11-19 07:55:11,522 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 76 selfloop transitions, 10 changer transitions 5/91 dead transitions. [2023-11-19 07:55:11,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 91 transitions, 473 flow [2023-11-19 07:55:11,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:55:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:55:11,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1571 transitions. [2023-11-19 07:55:11,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40954118873826906 [2023-11-19 07:55:11,530 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1571 transitions. [2023-11-19 07:55:11,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1571 transitions. [2023-11-19 07:55:11,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:11,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1571 transitions. [2023-11-19 07:55:11,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 224.42857142857142) internal successors, (1571), 7 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:11,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 548.0) internal successors, (4384), 8 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:11,552 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 548.0) internal successors, (4384), 8 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:11,552 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 126 flow. Second operand 7 states and 1571 transitions. [2023-11-19 07:55:11,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 91 transitions, 473 flow [2023-11-19 07:55:11,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 91 transitions, 469 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-19 07:55:11,558 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 186 flow [2023-11-19 07:55:11,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-19 07:55:11,559 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 18 predicate places. [2023-11-19 07:55:11,559 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 186 flow [2023-11-19 07:55:11,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:11,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:11,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:11,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:11,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:11,771 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:55:11,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:11,772 INFO L85 PathProgramCache]: Analyzing trace with hash 502754368, now seen corresponding path program 1 times [2023-11-19 07:55:11,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:11,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739385957] [2023-11-19 07:55:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:11,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:12,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:12,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739385957] [2023-11-19 07:55:12,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739385957] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:12,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480741064] [2023-11-19 07:55:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:12,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:12,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:12,140 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:12,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:55:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:12,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:55:12,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:12,590 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:55:12,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 108 [2023-11-19 07:55:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:12,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:12,854 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:55:12,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 125 [2023-11-19 07:55:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:13,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480741064] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:13,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:13,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2023-11-19 07:55:13,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103287881] [2023-11-19 07:55:13,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:13,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:55:13,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:13,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:55:13,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:55:13,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 548 [2023-11-19 07:55:13,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 186 flow. Second operand has 9 states, 9 states have (on average 213.77777777777777) internal successors, (1924), 9 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:13,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:13,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 548 [2023-11-19 07:55:13,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:13,858 INFO L124 PetriNetUnfolderBase]: 388/719 cut-off events. [2023-11-19 07:55:13,858 INFO L125 PetriNetUnfolderBase]: For 662/662 co-relation queries the response was YES. [2023-11-19 07:55:13,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1965 conditions, 719 events. 388/719 cut-off events. For 662/662 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3327 event pairs, 194 based on Foata normal form. 13/648 useless extension candidates. Maximal degree in co-relation 1649. Up to 362 conditions per place. [2023-11-19 07:55:13,865 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 86 selfloop transitions, 11 changer transitions 4/101 dead transitions. [2023-11-19 07:55:13,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 101 transitions, 604 flow [2023-11-19 07:55:13,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:55:13,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:55:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1784 transitions. [2023-11-19 07:55:13,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40693430656934304 [2023-11-19 07:55:13,874 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1784 transitions. [2023-11-19 07:55:13,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1784 transitions. [2023-11-19 07:55:13,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:13,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1784 transitions. [2023-11-19 07:55:13,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 223.0) internal successors, (1784), 8 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:13,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:13,893 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:13,894 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 186 flow. Second operand 8 states and 1784 transitions. [2023-11-19 07:55:13,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 101 transitions, 604 flow [2023-11-19 07:55:13,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 101 transitions, 591 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-19 07:55:13,905 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 264 flow [2023-11-19 07:55:13,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=264, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2023-11-19 07:55:13,908 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 27 predicate places. [2023-11-19 07:55:13,908 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 264 flow [2023-11-19 07:55:13,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 213.77777777777777) internal successors, (1924), 9 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:13,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:13,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:13,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:14,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:14,123 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:55:14,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:14,124 INFO L85 PathProgramCache]: Analyzing trace with hash 252316846, now seen corresponding path program 2 times [2023-11-19 07:55:14,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:14,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224941111] [2023-11-19 07:55:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:14,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:14,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:14,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224941111] [2023-11-19 07:55:14,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224941111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:14,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35731224] [2023-11-19 07:55:14,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:55:14,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:14,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:14,467 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:14,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:55:14,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:55:14,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:14,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:55:14,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:55:14,705 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:55:14,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35731224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:14,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:55:14,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-19 07:55:14,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673855859] [2023-11-19 07:55:14,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:14,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:55:14,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:14,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:55:14,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:55:14,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 548 [2023-11-19 07:55:14,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 264 flow. Second operand has 7 states, 7 states have (on average 221.28571428571428) internal successors, (1549), 7 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:14,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:14,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 548 [2023-11-19 07:55:14,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:15,317 INFO L124 PetriNetUnfolderBase]: 396/751 cut-off events. [2023-11-19 07:55:15,318 INFO L125 PetriNetUnfolderBase]: For 1066/1066 co-relation queries the response was YES. [2023-11-19 07:55:15,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2116 conditions, 751 events. 396/751 cut-off events. For 1066/1066 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3667 event pairs, 64 based on Foata normal form. 19/680 useless extension candidates. Maximal degree in co-relation 1836. Up to 343 conditions per place. [2023-11-19 07:55:15,324 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 66 selfloop transitions, 20 changer transitions 6/92 dead transitions. [2023-11-19 07:55:15,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 92 transitions, 597 flow [2023-11-19 07:55:15,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:55:15,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:55:15,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2050 transitions. [2023-11-19 07:55:15,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41565287915652877 [2023-11-19 07:55:15,334 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2050 transitions. [2023-11-19 07:55:15,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2050 transitions. [2023-11-19 07:55:15,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:15,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2050 transitions. [2023-11-19 07:55:15,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 227.77777777777777) internal successors, (2050), 9 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:15,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:15,353 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:15,353 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 264 flow. Second operand 9 states and 2050 transitions. [2023-11-19 07:55:15,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 92 transitions, 597 flow [2023-11-19 07:55:15,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 566 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-11-19 07:55:15,361 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 353 flow [2023-11-19 07:55:15,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=353, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2023-11-19 07:55:15,362 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 35 predicate places. [2023-11-19 07:55:15,362 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 353 flow [2023-11-19 07:55:15,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 221.28571428571428) internal successors, (1549), 7 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:15,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:15,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:15,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:15,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:15,579 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:55:15,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:15,580 INFO L85 PathProgramCache]: Analyzing trace with hash 262267950, now seen corresponding path program 2 times [2023-11-19 07:55:15,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:15,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493879246] [2023-11-19 07:55:15,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:15,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:15,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:15,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493879246] [2023-11-19 07:55:15,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493879246] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:15,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677309899] [2023-11-19 07:55:15,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:55:15,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:15,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:15,859 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:15,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:55:15,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:55:15,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:15,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:55:15,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:16,131 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:55:16,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 74 [2023-11-19 07:55:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:55:16,202 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:55:16,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677309899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:16,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:55:16,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-11-19 07:55:16,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671394716] [2023-11-19 07:55:16,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:16,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:55:16,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:16,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:55:16,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:55:16,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 548 [2023-11-19 07:55:16,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 353 flow. Second operand has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:16,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:16,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 548 [2023-11-19 07:55:16,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:16,885 INFO L124 PetriNetUnfolderBase]: 378/732 cut-off events. [2023-11-19 07:55:16,885 INFO L125 PetriNetUnfolderBase]: For 1568/1568 co-relation queries the response was YES. [2023-11-19 07:55:16,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2120 conditions, 732 events. 378/732 cut-off events. For 1568/1568 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3636 event pairs, 64 based on Foata normal form. 19/661 useless extension candidates. Maximal degree in co-relation 1897. Up to 323 conditions per place. [2023-11-19 07:55:16,892 INFO L140 encePairwiseOnDemand]: 539/548 looper letters, 64 selfloop transitions, 23 changer transitions 6/93 dead transitions. [2023-11-19 07:55:16,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 93 transitions, 655 flow [2023-11-19 07:55:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:55:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:55:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2028 transitions. [2023-11-19 07:55:16,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41119221411192214 [2023-11-19 07:55:16,902 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2028 transitions. [2023-11-19 07:55:16,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2028 transitions. [2023-11-19 07:55:16,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:16,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2028 transitions. [2023-11-19 07:55:16,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 225.33333333333334) internal successors, (2028), 9 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:16,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:16,922 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:16,922 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 353 flow. Second operand 9 states and 2028 transitions. [2023-11-19 07:55:16,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 93 transitions, 655 flow [2023-11-19 07:55:16,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 93 transitions, 630 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-11-19 07:55:16,933 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 427 flow [2023-11-19 07:55:16,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=427, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2023-11-19 07:55:16,936 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 43 predicate places. [2023-11-19 07:55:16,936 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 427 flow [2023-11-19 07:55:16,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:16,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:16,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:16,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:17,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:17,160 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:55:17,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:17,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1732272112, now seen corresponding path program 1 times [2023-11-19 07:55:17,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:17,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703357821] [2023-11-19 07:55:17,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:17,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:17,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:17,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703357821] [2023-11-19 07:55:17,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703357821] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:17,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172506974] [2023-11-19 07:55:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:17,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:17,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:17,411 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:17,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:55:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:17,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:55:17,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:17,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:17,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172506974] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:17,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:17,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2023-11-19 07:55:17,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639499955] [2023-11-19 07:55:17,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:17,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:55:17,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:17,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:55:17,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:55:17,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 548 [2023-11-19 07:55:17,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 427 flow. Second operand has 7 states, 7 states have (on average 220.42857142857142) internal successors, (1543), 7 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:17,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:17,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 548 [2023-11-19 07:55:17,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:18,356 INFO L124 PetriNetUnfolderBase]: 398/776 cut-off events. [2023-11-19 07:55:18,357 INFO L125 PetriNetUnfolderBase]: For 2066/2066 co-relation queries the response was YES. [2023-11-19 07:55:18,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2421 conditions, 776 events. 398/776 cut-off events. For 2066/2066 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3941 event pairs, 126 based on Foata normal form. 0/686 useless extension candidates. Maximal degree in co-relation 1980. Up to 216 conditions per place. [2023-11-19 07:55:18,365 INFO L140 encePairwiseOnDemand]: 539/548 looper letters, 91 selfloop transitions, 14 changer transitions 8/113 dead transitions. [2023-11-19 07:55:18,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 113 transitions, 875 flow [2023-11-19 07:55:18,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:55:18,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:55:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2053 transitions. [2023-11-19 07:55:18,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4162611516626115 [2023-11-19 07:55:18,375 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2053 transitions. [2023-11-19 07:55:18,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2053 transitions. [2023-11-19 07:55:18,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:18,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2053 transitions. [2023-11-19 07:55:18,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 228.11111111111111) internal successors, (2053), 9 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:18,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:18,395 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:18,395 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 427 flow. Second operand 9 states and 2053 transitions. [2023-11-19 07:55:18,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 113 transitions, 875 flow [2023-11-19 07:55:18,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 113 transitions, 852 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-19 07:55:18,407 INFO L231 Difference]: Finished difference. Result has 74 places, 60 transitions, 450 flow [2023-11-19 07:55:18,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=450, PETRI_PLACES=74, PETRI_TRANSITIONS=60} [2023-11-19 07:55:18,410 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2023-11-19 07:55:18,410 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 60 transitions, 450 flow [2023-11-19 07:55:18,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 220.42857142857142) internal successors, (1543), 7 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:18,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:18,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:18,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:18,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:18,629 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:55:18,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:18,629 INFO L85 PathProgramCache]: Analyzing trace with hash 103724198, now seen corresponding path program 1 times [2023-11-19 07:55:18,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:18,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877620016] [2023-11-19 07:55:18,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:18,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:18,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:18,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877620016] [2023-11-19 07:55:18,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877620016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:18,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:18,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:55:18,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223883360] [2023-11-19 07:55:18,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:18,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:55:18,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:18,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:55:18,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:55:18,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 548 [2023-11-19 07:55:18,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 60 transitions, 450 flow. Second operand has 5 states, 5 states have (on average 228.6) internal successors, (1143), 5 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:18,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:18,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 548 [2023-11-19 07:55:18,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:19,047 INFO L124 PetriNetUnfolderBase]: 262/536 cut-off events. [2023-11-19 07:55:19,047 INFO L125 PetriNetUnfolderBase]: For 1679/1679 co-relation queries the response was YES. [2023-11-19 07:55:19,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1841 conditions, 536 events. 262/536 cut-off events. For 1679/1679 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2471 event pairs, 167 based on Foata normal form. 24/558 useless extension candidates. Maximal degree in co-relation 1540. Up to 383 conditions per place. [2023-11-19 07:55:19,053 INFO L140 encePairwiseOnDemand]: 543/548 looper letters, 37 selfloop transitions, 2 changer transitions 26/65 dead transitions. [2023-11-19 07:55:19,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 65 transitions, 550 flow [2023-11-19 07:55:19,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:55:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:55:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1169 transitions. [2023-11-19 07:55:19,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42664233576642335 [2023-11-19 07:55:19,059 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1169 transitions. [2023-11-19 07:55:19,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1169 transitions. [2023-11-19 07:55:19,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:19,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1169 transitions. [2023-11-19 07:55:19,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 233.8) internal successors, (1169), 5 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:19,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 548.0) internal successors, (3288), 6 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:19,069 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 548.0) internal successors, (3288), 6 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:19,069 INFO L175 Difference]: Start difference. First operand has 74 places, 60 transitions, 450 flow. Second operand 5 states and 1169 transitions. [2023-11-19 07:55:19,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 65 transitions, 550 flow [2023-11-19 07:55:19,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 65 transitions, 532 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-19 07:55:19,079 INFO L231 Difference]: Finished difference. Result has 71 places, 39 transitions, 254 flow [2023-11-19 07:55:19,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=71, PETRI_TRANSITIONS=39} [2023-11-19 07:55:19,081 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 46 predicate places. [2023-11-19 07:55:19,081 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 39 transitions, 254 flow [2023-11-19 07:55:19,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.6) internal successors, (1143), 5 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:19,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:19,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:19,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:55:19,083 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:55:19,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:19,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1170040822, now seen corresponding path program 1 times [2023-11-19 07:55:19,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:19,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25326313] [2023-11-19 07:55:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:19,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:55:19,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:19,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25326313] [2023-11-19 07:55:19,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25326313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:19,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:19,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:55:19,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570640497] [2023-11-19 07:55:19,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:19,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:55:19,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:19,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:55:19,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:55:19,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 548 [2023-11-19 07:55:19,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 39 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 228.8) internal successors, (1144), 5 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:19,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:19,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 548 [2023-11-19 07:55:19,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:19,474 INFO L124 PetriNetUnfolderBase]: 133/263 cut-off events. [2023-11-19 07:55:19,474 INFO L125 PetriNetUnfolderBase]: For 1088/1088 co-relation queries the response was YES. [2023-11-19 07:55:19,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 263 events. 133/263 cut-off events. For 1088/1088 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 896 event pairs, 79 based on Foata normal form. 12/274 useless extension candidates. Maximal degree in co-relation 957. Up to 188 conditions per place. [2023-11-19 07:55:19,478 INFO L140 encePairwiseOnDemand]: 543/548 looper letters, 26 selfloop transitions, 2 changer transitions 18/46 dead transitions. [2023-11-19 07:55:19,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 46 transitions, 338 flow [2023-11-19 07:55:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:55:19,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:55:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1167 transitions. [2023-11-19 07:55:19,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42591240875912406 [2023-11-19 07:55:19,484 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1167 transitions. [2023-11-19 07:55:19,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1167 transitions. [2023-11-19 07:55:19,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:19,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1167 transitions. [2023-11-19 07:55:19,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 233.4) internal successors, (1167), 5 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:19,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 548.0) internal successors, (3288), 6 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:19,494 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 548.0) internal successors, (3288), 6 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:19,494 INFO L175 Difference]: Start difference. First operand has 71 places, 39 transitions, 254 flow. Second operand 5 states and 1167 transitions. [2023-11-19 07:55:19,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 46 transitions, 338 flow [2023-11-19 07:55:19,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 293 flow, removed 13 selfloop flow, removed 13 redundant places. [2023-11-19 07:55:19,499 INFO L231 Difference]: Finished difference. Result has 49 places, 28 transitions, 132 flow [2023-11-19 07:55:19,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=49, PETRI_TRANSITIONS=28} [2023-11-19 07:55:19,500 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 24 predicate places. [2023-11-19 07:55:19,500 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 28 transitions, 132 flow [2023-11-19 07:55:19,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.8) internal successors, (1144), 5 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:19,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:19,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:19,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:55:19,501 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:55:19,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:19,502 INFO L85 PathProgramCache]: Analyzing trace with hash -745696678, now seen corresponding path program 1 times [2023-11-19 07:55:19,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:19,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266805927] [2023-11-19 07:55:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:19,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:20,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:20,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266805927] [2023-11-19 07:55:20,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266805927] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:20,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121187590] [2023-11-19 07:55:20,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:20,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:20,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:20,207 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:20,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:55:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:20,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-19 07:55:20,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:20,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:21,369 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-19 07:55:21,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2023-11-19 07:55:21,407 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-19 07:55:21,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-19 07:55:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:21,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121187590] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:21,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:21,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2023-11-19 07:55:21,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532915903] [2023-11-19 07:55:21,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:21,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-19 07:55:21,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:21,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-19 07:55:21,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2023-11-19 07:55:25,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 548 [2023-11-19 07:55:25,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 28 transitions, 132 flow. Second operand has 30 states, 30 states have (on average 199.76666666666668) internal successors, (5993), 30 states have internal predecessors, (5993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:25,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:25,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 548 [2023-11-19 07:55:25,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:27,523 INFO L124 PetriNetUnfolderBase]: 585/1035 cut-off events. [2023-11-19 07:55:27,523 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2023-11-19 07:55:27,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3135 conditions, 1035 events. 585/1035 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4902 event pairs, 42 based on Foata normal form. 33/1066 useless extension candidates. Maximal degree in co-relation 3092. Up to 244 conditions per place. [2023-11-19 07:55:27,534 INFO L140 encePairwiseOnDemand]: 533/548 looper letters, 167 selfloop transitions, 51 changer transitions 1/219 dead transitions. [2023-11-19 07:55:27,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 219 transitions, 1282 flow [2023-11-19 07:55:27,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-19 07:55:27,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-19 07:55:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5765 transitions. [2023-11-19 07:55:27,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37571689259645463 [2023-11-19 07:55:27,557 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5765 transitions. [2023-11-19 07:55:27,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5765 transitions. [2023-11-19 07:55:27,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:27,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5765 transitions. [2023-11-19 07:55:27,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 205.89285714285714) internal successors, (5765), 28 states have internal predecessors, (5765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:27,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 548.0) internal successors, (15892), 29 states have internal predecessors, (15892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:27,608 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 548.0) internal successors, (15892), 29 states have internal predecessors, (15892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:27,608 INFO L175 Difference]: Start difference. First operand has 49 places, 28 transitions, 132 flow. Second operand 28 states and 5765 transitions. [2023-11-19 07:55:27,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 219 transitions, 1282 flow [2023-11-19 07:55:27,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 219 transitions, 1129 flow, removed 70 selfloop flow, removed 7 redundant places. [2023-11-19 07:55:27,629 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 546 flow [2023-11-19 07:55:27,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=546, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2023-11-19 07:55:27,630 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 53 predicate places. [2023-11-19 07:55:27,631 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 546 flow [2023-11-19 07:55:27,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 199.76666666666668) internal successors, (5993), 30 states have internal predecessors, (5993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:27,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:27,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:27,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:27,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:27,847 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:55:27,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:27,848 INFO L85 PathProgramCache]: Analyzing trace with hash 255070568, now seen corresponding path program 2 times [2023-11-19 07:55:27,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:27,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636674915] [2023-11-19 07:55:27,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:27,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:28,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:28,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636674915] [2023-11-19 07:55:28,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636674915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:28,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18940721] [2023-11-19 07:55:28,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:55:28,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:28,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:28,566 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:28,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:55:28,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:55:28,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:28,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 07:55:28,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:28,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:29,215 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-19 07:55:29,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-19 07:55:29,275 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-19 07:55:29,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 66 [2023-11-19 07:55:29,321 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-19 07:55:29,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-11-19 07:55:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:29,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18940721] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:29,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:29,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2023-11-19 07:55:29,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136761388] [2023-11-19 07:55:29,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:29,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 07:55:29,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:29,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 07:55:29,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:55:31,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 548 [2023-11-19 07:55:31,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 546 flow. Second operand has 23 states, 23 states have (on average 204.7826086956522) internal successors, (4710), 23 states have internal predecessors, (4710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:31,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:31,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 548 [2023-11-19 07:55:31,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:32,356 INFO L124 PetriNetUnfolderBase]: 773/1379 cut-off events. [2023-11-19 07:55:32,356 INFO L125 PetriNetUnfolderBase]: For 6901/6901 co-relation queries the response was YES. [2023-11-19 07:55:32,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6148 conditions, 1379 events. 773/1379 cut-off events. For 6901/6901 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7115 event pairs, 252 based on Foata normal form. 32/1411 useless extension candidates. Maximal degree in co-relation 6088. Up to 787 conditions per place. [2023-11-19 07:55:32,375 INFO L140 encePairwiseOnDemand]: 536/548 looper letters, 100 selfloop transitions, 38 changer transitions 0/138 dead transitions. [2023-11-19 07:55:32,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 138 transitions, 1233 flow [2023-11-19 07:55:32,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:55:32,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:55:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2304 transitions. [2023-11-19 07:55:32,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38221632382216325 [2023-11-19 07:55:32,386 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2304 transitions. [2023-11-19 07:55:32,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2304 transitions. [2023-11-19 07:55:32,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:32,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2304 transitions. [2023-11-19 07:55:32,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 209.45454545454547) internal successors, (2304), 11 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:32,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:32,407 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:32,407 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 546 flow. Second operand 11 states and 2304 transitions. [2023-11-19 07:55:32,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 138 transitions, 1233 flow [2023-11-19 07:55:32,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 138 transitions, 1137 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-11-19 07:55:32,441 INFO L231 Difference]: Finished difference. Result has 87 places, 95 transitions, 769 flow [2023-11-19 07:55:32,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=769, PETRI_PLACES=87, PETRI_TRANSITIONS=95} [2023-11-19 07:55:32,443 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 62 predicate places. [2023-11-19 07:55:32,443 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 95 transitions, 769 flow [2023-11-19 07:55:32,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 204.7826086956522) internal successors, (4710), 23 states have internal predecessors, (4710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:32,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:32,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:32,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:32,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:55:32,663 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:55:32,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:32,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2112802440, now seen corresponding path program 3 times [2023-11-19 07:55:32,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:32,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068529347] [2023-11-19 07:55:32,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:32,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:33,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:33,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068529347] [2023-11-19 07:55:33,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068529347] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:33,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055126416] [2023-11-19 07:55:33,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:55:33,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:33,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:33,318 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:33,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:55:33,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:55:33,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:33,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 07:55:33,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:33,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:33,997 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-19 07:55:33,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2023-11-19 07:55:34,022 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-19 07:55:34,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 4 [2023-11-19 07:55:34,030 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-19 07:55:34,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 4 [2023-11-19 07:55:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:34,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055126416] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:34,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:34,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 23 [2023-11-19 07:55:34,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823188774] [2023-11-19 07:55:34,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:34,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:55:34,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:34,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:55:34,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:55:35,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 548 [2023-11-19 07:55:35,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 95 transitions, 769 flow. Second operand has 10 states, 10 states have (on average 206.9) internal successors, (2069), 10 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:35,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:35,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 548 [2023-11-19 07:55:35,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:35,888 INFO L124 PetriNetUnfolderBase]: 821/1463 cut-off events. [2023-11-19 07:55:35,888 INFO L125 PetriNetUnfolderBase]: For 9167/9167 co-relation queries the response was YES. [2023-11-19 07:55:35,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7028 conditions, 1463 events. 821/1463 cut-off events. For 9167/9167 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7705 event pairs, 250 based on Foata normal form. 4/1467 useless extension candidates. Maximal degree in co-relation 6175. Up to 819 conditions per place. [2023-11-19 07:55:35,910 INFO L140 encePairwiseOnDemand]: 535/548 looper letters, 98 selfloop transitions, 58 changer transitions 0/156 dead transitions. [2023-11-19 07:55:35,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 156 transitions, 1562 flow [2023-11-19 07:55:35,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:55:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 07:55:35,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2744 transitions. [2023-11-19 07:55:35,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38517686692869174 [2023-11-19 07:55:35,918 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2744 transitions. [2023-11-19 07:55:35,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2744 transitions. [2023-11-19 07:55:35,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:35,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2744 transitions. [2023-11-19 07:55:35,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 211.07692307692307) internal successors, (2744), 13 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:35,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 548.0) internal successors, (7672), 14 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:35,940 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 548.0) internal successors, (7672), 14 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:35,940 INFO L175 Difference]: Start difference. First operand has 87 places, 95 transitions, 769 flow. Second operand 13 states and 2744 transitions. [2023-11-19 07:55:35,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 156 transitions, 1562 flow [2023-11-19 07:55:35,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 156 transitions, 1532 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-19 07:55:35,980 INFO L231 Difference]: Finished difference. Result has 100 places, 113 transitions, 1075 flow [2023-11-19 07:55:35,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1075, PETRI_PLACES=100, PETRI_TRANSITIONS=113} [2023-11-19 07:55:35,982 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 75 predicate places. [2023-11-19 07:55:35,982 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 113 transitions, 1075 flow [2023-11-19 07:55:35,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 206.9) internal successors, (2069), 10 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:35,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:35,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:36,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:36,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:55:36,207 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:55:36,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:36,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1639864874, now seen corresponding path program 4 times [2023-11-19 07:55:36,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:36,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470771968] [2023-11-19 07:55:36,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:36,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:36,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:36,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470771968] [2023-11-19 07:55:36,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470771968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:36,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679663833] [2023-11-19 07:55:36,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:55:36,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:36,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:36,843 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:36,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8da40ec9-48bb-4621-bb70-65e62d11de93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:55:36,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:55:36,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:36,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:55:36,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:55:37,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:37,642 INFO L349 Elim1Store]: treesize reduction 13, result has 92.9 percent of original size [2023-11-19 07:55:37,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 107 treesize of output 206 [2023-11-19 07:55:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:55:40,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679663833] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:40,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:40,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 21 [2023-11-19 07:55:40,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680039078] [2023-11-19 07:55:40,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:40,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:55:40,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:40,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:55:40,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420