./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-trans.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_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/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_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/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_2f6bd964-4069-4245-ab3b-4e1f02546286/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 f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:46:39,291 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:46:39,365 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:46:39,371 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:46:39,372 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:46:39,400 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:46:39,401 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:46:39,402 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:46:39,402 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:46:39,403 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:46:39,404 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:46:39,405 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:46:39,406 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:46:39,406 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:46:39,407 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:46:39,408 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:46:39,408 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:46:39,409 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:46:39,410 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:46:39,410 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:46:39,411 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:46:39,412 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:46:39,413 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:46:39,413 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:46:39,414 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:46:39,415 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:46:39,415 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:46:39,416 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:46:39,417 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:46:39,417 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:46:39,418 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:46:39,418 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:46:39,419 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:46:39,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:46:39,420 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:46:39,420 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:46:39,421 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:46:39,421 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:46:39,422 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:46:39,422 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_2f6bd964-4069-4245-ab3b-4e1f02546286/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2023-11-19 07:46:39,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:46:39,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:46:39,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:46:39,762 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:46:39,762 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:46:39,764 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2023-11-19 07:46:42,835 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:46:43,089 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:46:43,090 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2023-11-19 07:46:43,103 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/data/833cf71f5/32c048397c4c41828b14693e1cf7fbd9/FLAG906543446 [2023-11-19 07:46:43,124 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/data/833cf71f5/32c048397c4c41828b14693e1cf7fbd9 [2023-11-19 07:46:43,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:46:43,137 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:46:43,140 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:46:43,140 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:46:43,150 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:46:43,150 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:46:43" (1/1) ... [2023-11-19 07:46:43,152 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e514b34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:43, skipping insertion in model container [2023-11-19 07:46:43,152 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:46:43" (1/1) ... [2023-11-19 07:46:43,192 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:46:43,441 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_2f6bd964-4069-4245-ab3b-4e1f02546286/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2023-11-19 07:46:43,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:46:43,462 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:46:43,488 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_2f6bd964-4069-4245-ab3b-4e1f02546286/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2023-11-19 07:46:43,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:46:43,520 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:46:43,521 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:43 WrapperNode [2023-11-19 07:46:43,521 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:46:43,522 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:46:43,522 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:46:43,522 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:46:43,530 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:43" (1/1) ... [2023-11-19 07:46:43,539 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:43" (1/1) ... [2023-11-19 07:46:43,569 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 282 [2023-11-19 07:46:43,570 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:46:43,570 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:46:43,570 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:46:43,571 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:46:43,579 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:43" (1/1) ... [2023-11-19 07:46:43,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:43" (1/1) ... [2023-11-19 07:46:43,585 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:43" (1/1) ... [2023-11-19 07:46:43,585 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:43" (1/1) ... [2023-11-19 07:46:43,601 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:43" (1/1) ... [2023-11-19 07:46:43,606 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:43" (1/1) ... [2023-11-19 07:46:43,609 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:43" (1/1) ... [2023-11-19 07:46:43,611 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:43" (1/1) ... [2023-11-19 07:46:43,616 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:46:43,617 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:46:43,617 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:46:43,617 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:46:43,618 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:43" (1/1) ... [2023-11-19 07:46:43,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:46:43,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:43,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:46:43,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:46:43,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:46:43,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:46:43,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:46:43,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:46:43,718 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:46:43,719 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:46:43,719 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:46:43,719 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:46:43,719 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:46:43,719 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:46:43,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:46:43,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:46:43,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:46:43,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:46:43,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:46:43,722 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 07:46:43,850 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:46:43,853 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:46:44,444 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:46:44,461 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:46:44,461 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 07:46:44,468 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:46:44 BoogieIcfgContainer [2023-11-19 07:46:44,468 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:46:44,472 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:46:44,472 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:46:44,482 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:46:44,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:46:43" (1/3) ... [2023-11-19 07:46:44,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f2e99a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:46:44, skipping insertion in model container [2023-11-19 07:46:44,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:43" (2/3) ... [2023-11-19 07:46:44,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f2e99a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:46:44, skipping insertion in model container [2023-11-19 07:46:44,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:46:44" (3/3) ... [2023-11-19 07:46:44,486 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2023-11-19 07:46:44,512 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:46:44,522 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:46:44,522 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:46:44,522 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:46:44,704 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:46:44,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 364 transitions, 749 flow [2023-11-19 07:46:44,931 INFO L124 PetriNetUnfolderBase]: 28/361 cut-off events. [2023-11-19 07:46:44,932 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:46:44,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 361 events. 28/361 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 576 event pairs, 0 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 279. Up to 2 conditions per place. [2023-11-19 07:46:44,941 INFO L82 GeneralOperation]: Start removeDead. Operand has 346 places, 364 transitions, 749 flow [2023-11-19 07:46:44,951 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 332 places, 350 transitions, 718 flow [2023-11-19 07:46:44,955 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:46:44,965 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 332 places, 350 transitions, 718 flow [2023-11-19 07:46:44,968 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 332 places, 350 transitions, 718 flow [2023-11-19 07:46:44,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 350 transitions, 718 flow [2023-11-19 07:46:45,093 INFO L124 PetriNetUnfolderBase]: 28/350 cut-off events. [2023-11-19 07:46:45,093 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:46:45,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 350 events. 28/350 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 575 event pairs, 0 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 279. Up to 2 conditions per place. [2023-11-19 07:46:45,114 INFO L119 LiptonReduction]: Number of co-enabled transitions 21384 [2023-11-19 07:46:56,971 INFO L134 LiptonReduction]: Checked pairs total: 19538 [2023-11-19 07:46:56,971 INFO L136 LiptonReduction]: Total number of compositions: 398 [2023-11-19 07:46:56,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:46:56,994 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;@de29f6f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:46:56,995 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:46:57,003 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:46:57,003 INFO L124 PetriNetUnfolderBase]: 7/30 cut-off events. [2023-11-19 07:46:57,003 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:46:57,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:46:57,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:57,005 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:46:57,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:57,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1361798884, now seen corresponding path program 1 times [2023-11-19 07:46:57,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:57,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720528150] [2023-11-19 07:46:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:57,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:57,826 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 07:46:57,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:57,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720528150] [2023-11-19 07:46:57,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720528150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:57,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:57,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:46:57,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940793027] [2023-11-19 07:46:57,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:57,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:46:57,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:57,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:46:57,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:46:57,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 762 [2023-11-19 07:46:57,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 334.5) internal successors, (1338), 4 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:57,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:46:57,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 762 [2023-11-19 07:46:57,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:46:58,207 INFO L124 PetriNetUnfolderBase]: 566/823 cut-off events. [2023-11-19 07:46:58,207 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-11-19 07:46:58,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1720 conditions, 823 events. 566/823 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2637 event pairs, 253 based on Foata normal form. 1/629 useless extension candidates. Maximal degree in co-relation 1384. Up to 543 conditions per place. [2023-11-19 07:46:58,215 INFO L140 encePairwiseOnDemand]: 758/762 looper letters, 42 selfloop transitions, 2 changer transitions 2/46 dead transitions. [2023-11-19 07:46:58,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 46 transitions, 211 flow [2023-11-19 07:46:58,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:46:58,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:46:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1036 transitions. [2023-11-19 07:46:58,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531933508311461 [2023-11-19 07:46:58,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1036 transitions. [2023-11-19 07:46:58,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1036 transitions. [2023-11-19 07:46:58,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:46:58,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1036 transitions. [2023-11-19 07:46:58,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 345.3333333333333) internal successors, (1036), 3 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:58,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 762.0) internal successors, (3048), 4 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:58,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 762.0) internal successors, (3048), 4 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:58,277 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 80 flow. Second operand 3 states and 1036 transitions. [2023-11-19 07:46:58,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 46 transitions, 211 flow [2023-11-19 07:46:58,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 46 transitions, 193 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:46:58,286 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 78 flow [2023-11-19 07:46:58,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2023-11-19 07:46:58,291 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2023-11-19 07:46:58,292 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 78 flow [2023-11-19 07:46:58,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 334.5) internal successors, (1338), 4 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:58,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:46:58,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:58,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:46:58,294 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:46:58,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:58,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1853477299, now seen corresponding path program 1 times [2023-11-19 07:46:58,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:58,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430083479] [2023-11-19 07:46:58,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:58,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:58,446 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 07:46:58,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:58,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430083479] [2023-11-19 07:46:58,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430083479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:58,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:58,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:46:58,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307256164] [2023-11-19 07:46:58,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:58,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:46:58,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:58,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:46:58,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:46:58,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 762 [2023-11-19 07:46:58,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 324.6666666666667) internal successors, (974), 3 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:58,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:46:58,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 762 [2023-11-19 07:46:58,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:46:58,756 INFO L124 PetriNetUnfolderBase]: 566/826 cut-off events. [2023-11-19 07:46:58,756 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-11-19 07:46:58,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1846 conditions, 826 events. 566/826 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2597 event pairs, 413 based on Foata normal form. 0/715 useless extension candidates. Maximal degree in co-relation 463. Up to 824 conditions per place. [2023-11-19 07:46:58,762 INFO L140 encePairwiseOnDemand]: 755/762 looper letters, 28 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-11-19 07:46:58,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 34 transitions, 152 flow [2023-11-19 07:46:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:46:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:46:58,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 987 transitions. [2023-11-19 07:46:58,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431758530183727 [2023-11-19 07:46:58,768 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 987 transitions. [2023-11-19 07:46:58,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 987 transitions. [2023-11-19 07:46:58,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:46:58,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 987 transitions. [2023-11-19 07:46:58,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 329.0) internal successors, (987), 3 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:58,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 762.0) internal successors, (3048), 4 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:58,789 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 762.0) internal successors, (3048), 4 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:58,790 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 78 flow. Second operand 3 states and 987 transitions. [2023-11-19 07:46:58,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 34 transitions, 152 flow [2023-11-19 07:46:58,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:46:58,794 INFO L231 Difference]: Finished difference. Result has 33 places, 34 transitions, 108 flow [2023-11-19 07:46:58,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=33, PETRI_TRANSITIONS=34} [2023-11-19 07:46:58,796 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2023-11-19 07:46:58,796 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 34 transitions, 108 flow [2023-11-19 07:46:58,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 324.6666666666667) internal successors, (974), 3 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:58,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:46:58,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:58,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:46:58,803 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:46:58,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:58,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1664998755, now seen corresponding path program 1 times [2023-11-19 07:46:58,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:58,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299581633] [2023-11-19 07:46:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:58,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:46:59,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:59,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299581633] [2023-11-19 07:46:59,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299581633] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:46:59,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292047205] [2023-11-19 07:46:59,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:59,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:59,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:59,008 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:59,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:46:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:59,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:46:59,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:46:59,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:46:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:46:59,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292047205] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:46:59,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:46:59,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-19 07:46:59,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460143768] [2023-11-19 07:46:59,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:46:59,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:46:59,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:59,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:46:59,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:46:59,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 762 [2023-11-19 07:46:59,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 34 transitions, 108 flow. Second operand has 8 states, 8 states have (on average 315.0) internal successors, (2520), 8 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:59,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:46:59,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 762 [2023-11-19 07:46:59,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:46:59,638 INFO L124 PetriNetUnfolderBase]: 566/835 cut-off events. [2023-11-19 07:46:59,638 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2023-11-19 07:46:59,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1845 conditions, 835 events. 566/835 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2598 event pairs, 413 based on Foata normal form. 6/732 useless extension candidates. Maximal degree in co-relation 1795. Up to 824 conditions per place. [2023-11-19 07:46:59,644 INFO L140 encePairwiseOnDemand]: 755/762 looper letters, 28 selfloop transitions, 15 changer transitions 0/43 dead transitions. [2023-11-19 07:46:59,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 230 flow [2023-11-19 07:46:59,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:46:59,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:46:59,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1917 transitions. [2023-11-19 07:46:59,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41929133858267714 [2023-11-19 07:46:59,653 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1917 transitions. [2023-11-19 07:46:59,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1917 transitions. [2023-11-19 07:46:59,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:46:59,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1917 transitions. [2023-11-19 07:46:59,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 319.5) internal successors, (1917), 6 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:59,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 762.0) internal successors, (5334), 7 states have internal predecessors, (5334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:59,676 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 762.0) internal successors, (5334), 7 states have internal predecessors, (5334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:59,676 INFO L175 Difference]: Start difference. First operand has 33 places, 34 transitions, 108 flow. Second operand 6 states and 1917 transitions. [2023-11-19 07:46:59,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 230 flow [2023-11-19 07:46:59,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:46:59,679 INFO L231 Difference]: Finished difference. Result has 40 places, 43 transitions, 198 flow [2023-11-19 07:46:59,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=40, PETRI_TRANSITIONS=43} [2023-11-19 07:46:59,681 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2023-11-19 07:46:59,681 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 43 transitions, 198 flow [2023-11-19 07:46:59,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 315.0) internal successors, (2520), 8 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:46:59,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:46:59,684 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:59,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:59,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:59,904 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:46:59,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:59,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1550457139, now seen corresponding path program 2 times [2023-11-19 07:46:59,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:59,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708709802] [2023-11-19 07:46:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:59,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 07:47:00,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:00,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708709802] [2023-11-19 07:47:00,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708709802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:00,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066758800] [2023-11-19 07:47:00,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:47:00,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:00,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:00,193 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:00,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:47:00,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:47:00,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:47:00,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:47:00,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-19 07:47:00,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:00,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066758800] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:00,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:47:00,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-19 07:47:00,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470677937] [2023-11-19 07:47:00,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:00,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:47:00,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:00,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:47:00,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:47:00,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 762 [2023-11-19 07:47:00,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 43 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 336.5) internal successors, (1346), 4 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:00,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:00,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 762 [2023-11-19 07:47:00,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:00,773 INFO L124 PetriNetUnfolderBase]: 988/1460 cut-off events. [2023-11-19 07:47:00,773 INFO L125 PetriNetUnfolderBase]: For 173/173 co-relation queries the response was YES. [2023-11-19 07:47:00,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3243 conditions, 1460 events. 988/1460 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5685 event pairs, 413 based on Foata normal form. 22/1276 useless extension candidates. Maximal degree in co-relation 3154. Up to 836 conditions per place. [2023-11-19 07:47:00,782 INFO L140 encePairwiseOnDemand]: 758/762 looper letters, 72 selfloop transitions, 3 changer transitions 2/77 dead transitions. [2023-11-19 07:47:00,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 77 transitions, 441 flow [2023-11-19 07:47:00,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:47:00,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:47:00,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1383 transitions. [2023-11-19 07:47:00,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453740157480315 [2023-11-19 07:47:00,789 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1383 transitions. [2023-11-19 07:47:00,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1383 transitions. [2023-11-19 07:47:00,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:00,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1383 transitions. [2023-11-19 07:47:00,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 345.75) internal successors, (1383), 4 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:00,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 762.0) internal successors, (3810), 5 states have internal predecessors, (3810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:00,810 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 762.0) internal successors, (3810), 5 states have internal predecessors, (3810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:00,811 INFO L175 Difference]: Start difference. First operand has 40 places, 43 transitions, 198 flow. Second operand 4 states and 1383 transitions. [2023-11-19 07:47:00,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 77 transitions, 441 flow [2023-11-19 07:47:00,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 77 transitions, 417 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:00,819 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 194 flow [2023-11-19 07:47:00,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-11-19 07:47:00,826 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 10 predicate places. [2023-11-19 07:47:00,826 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 194 flow [2023-11-19 07:47:00,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 336.5) internal successors, (1346), 4 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:00,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:00,828 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:00,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:01,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-19 07:47:01,044 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:47:01,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:01,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1154803533, now seen corresponding path program 3 times [2023-11-19 07:47:01,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:01,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844683999] [2023-11-19 07:47:01,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:01,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 07:47:01,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:01,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844683999] [2023-11-19 07:47:01,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844683999] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:01,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546795267] [2023-11-19 07:47:01,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:47:01,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:01,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:01,300 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:01,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:47:01,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-19 07:47:01,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:47:01,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:47:01,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-19 07:47:01,533 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:01,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546795267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:01,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:47:01,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-19 07:47:01,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651915897] [2023-11-19 07:47:01,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:01,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:47:01,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:01,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:47:01,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:47:01,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 762 [2023-11-19 07:47:01,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 335.5) internal successors, (1342), 4 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:01,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:01,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 762 [2023-11-19 07:47:01,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:01,961 INFO L124 PetriNetUnfolderBase]: 1162/1706 cut-off events. [2023-11-19 07:47:01,961 INFO L125 PetriNetUnfolderBase]: For 743/743 co-relation queries the response was YES. [2023-11-19 07:47:01,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4272 conditions, 1706 events. 1162/1706 cut-off events. For 743/743 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7080 event pairs, 166 based on Foata normal form. 36/1612 useless extension candidates. Maximal degree in co-relation 4192. Up to 1187 conditions per place. [2023-11-19 07:47:01,974 INFO L140 encePairwiseOnDemand]: 756/762 looper letters, 66 selfloop transitions, 5 changer transitions 1/72 dead transitions. [2023-11-19 07:47:01,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 72 transitions, 424 flow [2023-11-19 07:47:01,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:47:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:47:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1370 transitions. [2023-11-19 07:47:01,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494750656167979 [2023-11-19 07:47:01,981 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1370 transitions. [2023-11-19 07:47:01,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1370 transitions. [2023-11-19 07:47:01,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:01,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1370 transitions. [2023-11-19 07:47:01,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 342.5) internal successors, (1370), 4 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:01,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 762.0) internal successors, (3810), 5 states have internal predecessors, (3810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:01,996 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 762.0) internal successors, (3810), 5 states have internal predecessors, (3810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:01,997 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 194 flow. Second operand 4 states and 1370 transitions. [2023-11-19 07:47:01,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 72 transitions, 424 flow [2023-11-19 07:47:02,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 72 transitions, 419 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:02,003 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 223 flow [2023-11-19 07:47:02,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2023-11-19 07:47:02,006 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2023-11-19 07:47:02,006 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 223 flow [2023-11-19 07:47:02,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 335.5) internal successors, (1342), 4 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:02,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:02,007 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:02,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:02,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:02,229 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:47:02,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:02,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1678087651, now seen corresponding path program 4 times [2023-11-19 07:47:02,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:02,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761321821] [2023-11-19 07:47:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:02,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 07:47:02,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:02,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761321821] [2023-11-19 07:47:02,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761321821] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:02,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121199663] [2023-11-19 07:47:02,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:47:02,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:02,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:02,593 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:02,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:47:02,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:47:02,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:47:02,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:47:02,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 07:47:02,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 07:47:02,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121199663] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:02,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:47:02,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-11-19 07:47:02,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761560150] [2023-11-19 07:47:02,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:03,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:47:03,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:03,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:47:03,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:47:03,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 762 [2023-11-19 07:47:03,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 223 flow. Second operand has 17 states, 17 states have (on average 313.52941176470586) internal successors, (5330), 17 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:03,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:03,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 762 [2023-11-19 07:47:03,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:03,868 INFO L124 PetriNetUnfolderBase]: 1162/1709 cut-off events. [2023-11-19 07:47:03,868 INFO L125 PetriNetUnfolderBase]: For 1619/1619 co-relation queries the response was YES. [2023-11-19 07:47:03,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4543 conditions, 1709 events. 1162/1709 cut-off events. For 1619/1619 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6443 event pairs, 857 based on Foata normal form. 1/1580 useless extension candidates. Maximal degree in co-relation 4448. Up to 1695 conditions per place. [2023-11-19 07:47:03,881 INFO L140 encePairwiseOnDemand]: 755/762 looper letters, 32 selfloop transitions, 18 changer transitions 0/50 dead transitions. [2023-11-19 07:47:03,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 341 flow [2023-11-19 07:47:03,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:47:03,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:47:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2225 transitions. [2023-11-19 07:47:03,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41713535808024 [2023-11-19 07:47:03,891 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2225 transitions. [2023-11-19 07:47:03,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2225 transitions. [2023-11-19 07:47:03,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:03,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2225 transitions. [2023-11-19 07:47:03,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 317.85714285714283) internal successors, (2225), 7 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:03,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 762.0) internal successors, (6096), 8 states have internal predecessors, (6096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:03,912 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 762.0) internal successors, (6096), 8 states have internal predecessors, (6096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:03,912 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 223 flow. Second operand 7 states and 2225 transitions. [2023-11-19 07:47:03,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 341 flow [2023-11-19 07:47:03,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:03,916 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 288 flow [2023-11-19 07:47:03,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=288, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-11-19 07:47:03,918 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-11-19 07:47:03,918 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 288 flow [2023-11-19 07:47:03,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 313.52941176470586) internal successors, (5330), 17 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:03,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:03,921 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:03,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:04,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:04,143 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:47:04,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:04,143 INFO L85 PathProgramCache]: Analyzing trace with hash 959438263, now seen corresponding path program 5 times [2023-11-19 07:47:04,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:04,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172335574] [2023-11-19 07:47:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:04,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-19 07:47:04,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:04,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172335574] [2023-11-19 07:47:04,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172335574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:04,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:04,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:47:04,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779539059] [2023-11-19 07:47:04,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:04,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:47:04,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:04,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:47:04,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:47:04,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 762 [2023-11-19 07:47:04,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 332.2) internal successors, (1661), 5 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:04,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:04,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 762 [2023-11-19 07:47:04,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:05,220 INFO L124 PetriNetUnfolderBase]: 2129/3140 cut-off events. [2023-11-19 07:47:05,220 INFO L125 PetriNetUnfolderBase]: For 2439/2439 co-relation queries the response was YES. [2023-11-19 07:47:05,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8189 conditions, 3140 events. 2129/3140 cut-off events. For 2439/2439 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14456 event pairs, 879 based on Foata normal form. 26/2910 useless extension candidates. Maximal degree in co-relation 8074. Up to 1756 conditions per place. [2023-11-19 07:47:05,245 INFO L140 encePairwiseOnDemand]: 757/762 looper letters, 83 selfloop transitions, 3 changer transitions 17/103 dead transitions. [2023-11-19 07:47:05,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 103 transitions, 701 flow [2023-11-19 07:47:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:47:05,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:47:05,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1708 transitions. [2023-11-19 07:47:05,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482939632545932 [2023-11-19 07:47:05,253 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1708 transitions. [2023-11-19 07:47:05,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1708 transitions. [2023-11-19 07:47:05,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:05,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1708 transitions. [2023-11-19 07:47:05,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 341.6) internal successors, (1708), 5 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:05,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 762.0) internal successors, (4572), 6 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:05,269 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 762.0) internal successors, (4572), 6 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:05,270 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 288 flow. Second operand 5 states and 1708 transitions. [2023-11-19 07:47:05,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 103 transitions, 701 flow [2023-11-19 07:47:05,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 103 transitions, 665 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-19 07:47:05,276 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 274 flow [2023-11-19 07:47:05,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2023-11-19 07:47:05,277 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 23 predicate places. [2023-11-19 07:47:05,277 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 274 flow [2023-11-19 07:47:05,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 332.2) internal successors, (1661), 5 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:05,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:05,278 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:05,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:47:05,278 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:47:05,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:05,279 INFO L85 PathProgramCache]: Analyzing trace with hash -2131220663, now seen corresponding path program 6 times [2023-11-19 07:47:05,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:05,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774316959] [2023-11-19 07:47:05,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:05,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-19 07:47:05,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:05,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774316959] [2023-11-19 07:47:05,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774316959] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:05,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:05,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:47:05,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257507273] [2023-11-19 07:47:05,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:05,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:47:05,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:05,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:47:05,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:47:05,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 762 [2023-11-19 07:47:05,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 274 flow. Second operand has 4 states, 4 states have (on average 334.5) internal successors, (1338), 4 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:05,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:05,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 762 [2023-11-19 07:47:05,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:06,124 INFO L124 PetriNetUnfolderBase]: 1751/2550 cut-off events. [2023-11-19 07:47:06,125 INFO L125 PetriNetUnfolderBase]: For 3393/3393 co-relation queries the response was YES. [2023-11-19 07:47:06,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7573 conditions, 2550 events. 1751/2550 cut-off events. For 3393/3393 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10918 event pairs, 679 based on Foata normal form. 72/2622 useless extension candidates. Maximal degree in co-relation 7472. Up to 1504 conditions per place. [2023-11-19 07:47:06,149 INFO L140 encePairwiseOnDemand]: 757/762 looper letters, 77 selfloop transitions, 6 changer transitions 3/86 dead transitions. [2023-11-19 07:47:06,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 86 transitions, 575 flow [2023-11-19 07:47:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:47:06,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:47:06,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1373 transitions. [2023-11-19 07:47:06,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45045931758530183 [2023-11-19 07:47:06,156 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1373 transitions. [2023-11-19 07:47:06,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1373 transitions. [2023-11-19 07:47:06,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:06,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1373 transitions. [2023-11-19 07:47:06,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 343.25) internal successors, (1373), 4 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:06,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 762.0) internal successors, (3810), 5 states have internal predecessors, (3810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:06,169 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 762.0) internal successors, (3810), 5 states have internal predecessors, (3810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:06,170 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 274 flow. Second operand 4 states and 1373 transitions. [2023-11-19 07:47:06,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 86 transitions, 575 flow [2023-11-19 07:47:06,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 563 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-19 07:47:06,178 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 292 flow [2023-11-19 07:47:06,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=292, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2023-11-19 07:47:06,179 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 24 predicate places. [2023-11-19 07:47:06,179 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 292 flow [2023-11-19 07:47:06,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 334.5) internal successors, (1338), 4 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:06,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:06,180 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:06,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:47:06,181 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:47:06,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:06,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1170956408, now seen corresponding path program 1 times [2023-11-19 07:47:06,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:06,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908700956] [2023-11-19 07:47:06,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:06,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-19 07:47:06,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:06,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908700956] [2023-11-19 07:47:06,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908700956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:06,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:06,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:47:06,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380631619] [2023-11-19 07:47:06,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:06,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:47:06,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:06,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:47:06,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:47:06,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 762 [2023-11-19 07:47:06,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 292 flow. Second operand has 5 states, 5 states have (on average 331.6) internal successors, (1658), 5 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:06,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:06,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 762 [2023-11-19 07:47:06,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:07,220 INFO L124 PetriNetUnfolderBase]: 1970/2858 cut-off events. [2023-11-19 07:47:07,220 INFO L125 PetriNetUnfolderBase]: For 4505/4505 co-relation queries the response was YES. [2023-11-19 07:47:07,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8909 conditions, 2858 events. 1970/2858 cut-off events. For 4505/4505 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12603 event pairs, 699 based on Foata normal form. 20/2878 useless extension candidates. Maximal degree in co-relation 8808. Up to 1481 conditions per place. [2023-11-19 07:47:07,243 INFO L140 encePairwiseOnDemand]: 757/762 looper letters, 81 selfloop transitions, 6 changer transitions 16/103 dead transitions. [2023-11-19 07:47:07,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 103 transitions, 720 flow [2023-11-19 07:47:07,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:47:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:47:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1703 transitions. [2023-11-19 07:47:07,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4469816272965879 [2023-11-19 07:47:07,251 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1703 transitions. [2023-11-19 07:47:07,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1703 transitions. [2023-11-19 07:47:07,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:07,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1703 transitions. [2023-11-19 07:47:07,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 340.6) internal successors, (1703), 5 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:07,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 762.0) internal successors, (4572), 6 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:07,267 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 762.0) internal successors, (4572), 6 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:07,267 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 292 flow. Second operand 5 states and 1703 transitions. [2023-11-19 07:47:07,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 103 transitions, 720 flow [2023-11-19 07:47:07,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 103 transitions, 690 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-19 07:47:07,274 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 322 flow [2023-11-19 07:47:07,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-11-19 07:47:07,275 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 27 predicate places. [2023-11-19 07:47:07,276 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 322 flow [2023-11-19 07:47:07,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 331.6) internal successors, (1658), 5 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:07,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:07,277 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:07,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:47:07,277 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:47:07,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:07,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2102150644, now seen corresponding path program 2 times [2023-11-19 07:47:07,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:07,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511439725] [2023-11-19 07:47:07,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:07,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-19 07:47:07,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:07,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511439725] [2023-11-19 07:47:07,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511439725] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:07,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484954918] [2023-11-19 07:47:07,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:47:07,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:07,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:07,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:07,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:47:07,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:47:07,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:47:07,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:47:07,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-19 07:47:07,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-19 07:47:07,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484954918] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:07,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:47:07,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2023-11-19 07:47:07,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641863909] [2023-11-19 07:47:07,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:07,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:47:08,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:08,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:47:08,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:47:08,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 762 [2023-11-19 07:47:08,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 322 flow. Second operand has 5 states, 5 states have (on average 330.6) internal successors, (1653), 5 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:08,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:08,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 762 [2023-11-19 07:47:08,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:08,759 INFO L124 PetriNetUnfolderBase]: 1986/2869 cut-off events. [2023-11-19 07:47:08,759 INFO L125 PetriNetUnfolderBase]: For 5158/5158 co-relation queries the response was YES. [2023-11-19 07:47:08,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9455 conditions, 2869 events. 1986/2869 cut-off events. For 5158/5158 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12203 event pairs, 267 based on Foata normal form. 36/2905 useless extension candidates. Maximal degree in co-relation 9352. Up to 713 conditions per place. [2023-11-19 07:47:08,799 INFO L140 encePairwiseOnDemand]: 754/762 looper letters, 112 selfloop transitions, 22 changer transitions 4/138 dead transitions. [2023-11-19 07:47:08,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 138 transitions, 1007 flow [2023-11-19 07:47:08,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:47:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:47:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2364 transitions. [2023-11-19 07:47:08,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431946006749156 [2023-11-19 07:47:08,809 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2364 transitions. [2023-11-19 07:47:08,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2364 transitions. [2023-11-19 07:47:08,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:08,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2364 transitions. [2023-11-19 07:47:08,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 337.7142857142857) internal successors, (2364), 7 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:08,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 762.0) internal successors, (6096), 8 states have internal predecessors, (6096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:08,830 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 762.0) internal successors, (6096), 8 states have internal predecessors, (6096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:08,830 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 322 flow. Second operand 7 states and 2364 transitions. [2023-11-19 07:47:08,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 138 transitions, 1007 flow [2023-11-19 07:47:08,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 138 transitions, 989 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-19 07:47:08,850 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 459 flow [2023-11-19 07:47:08,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=459, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2023-11-19 07:47:08,851 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 32 predicate places. [2023-11-19 07:47:08,851 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 459 flow [2023-11-19 07:47:08,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 330.6) internal successors, (1653), 5 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:08,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:08,852 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:08,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:09,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:09,073 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:47:09,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:09,073 INFO L85 PathProgramCache]: Analyzing trace with hash -189216288, now seen corresponding path program 3 times [2023-11-19 07:47:09,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:09,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960177000] [2023-11-19 07:47:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:09,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-19 07:47:09,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:09,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960177000] [2023-11-19 07:47:09,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960177000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:09,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917789663] [2023-11-19 07:47:09,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:47:09,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:09,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:09,467 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:09,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:47:09,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:47:09,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:47:09,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:47:09,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-19 07:47:09,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-19 07:47:09,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917789663] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:09,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:47:09,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2023-11-19 07:47:09,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129216287] [2023-11-19 07:47:09,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:09,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:47:09,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:09,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:47:09,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:47:10,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 762 [2023-11-19 07:47:10,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 459 flow. Second operand has 5 states, 5 states have (on average 330.6) internal successors, (1653), 5 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:10,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:10,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 762 [2023-11-19 07:47:10,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:10,688 INFO L124 PetriNetUnfolderBase]: 2074/2993 cut-off events. [2023-11-19 07:47:10,689 INFO L125 PetriNetUnfolderBase]: For 6580/6580 co-relation queries the response was YES. [2023-11-19 07:47:10,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10675 conditions, 2993 events. 2074/2993 cut-off events. For 6580/6580 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12941 event pairs, 473 based on Foata normal form. 36/3029 useless extension candidates. Maximal degree in co-relation 10570. Up to 1123 conditions per place. [2023-11-19 07:47:10,717 INFO L140 encePairwiseOnDemand]: 756/762 looper letters, 96 selfloop transitions, 21 changer transitions 1/118 dead transitions. [2023-11-19 07:47:10,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 118 transitions, 905 flow [2023-11-19 07:47:10,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:47:10,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:47:10,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1697 transitions. [2023-11-19 07:47:10,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44540682414698163 [2023-11-19 07:47:10,725 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1697 transitions. [2023-11-19 07:47:10,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1697 transitions. [2023-11-19 07:47:10,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:10,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1697 transitions. [2023-11-19 07:47:10,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 339.4) internal successors, (1697), 5 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:10,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 762.0) internal successors, (4572), 6 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:10,742 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 762.0) internal successors, (4572), 6 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:10,742 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 459 flow. Second operand 5 states and 1697 transitions. [2023-11-19 07:47:10,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 118 transitions, 905 flow [2023-11-19 07:47:10,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 118 transitions, 894 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:10,772 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 535 flow [2023-11-19 07:47:10,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=535, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2023-11-19 07:47:10,773 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 36 predicate places. [2023-11-19 07:47:10,773 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 535 flow [2023-11-19 07:47:10,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 330.6) internal successors, (1653), 5 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:10,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:10,774 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:10,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:10,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:10,989 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:47:10,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:10,989 INFO L85 PathProgramCache]: Analyzing trace with hash 598125516, now seen corresponding path program 4 times [2023-11-19 07:47:10,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:10,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246112490] [2023-11-19 07:47:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:10,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-19 07:47:11,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:11,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246112490] [2023-11-19 07:47:11,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246112490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:11,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:11,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:47:11,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574056234] [2023-11-19 07:47:11,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:11,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:47:11,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:11,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:47:11,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:47:11,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 762 [2023-11-19 07:47:11,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 535 flow. Second operand has 5 states, 5 states have (on average 331.6) internal successors, (1658), 5 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:11,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:11,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 762 [2023-11-19 07:47:11,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:12,011 INFO L124 PetriNetUnfolderBase]: 2054/2973 cut-off events. [2023-11-19 07:47:12,011 INFO L125 PetriNetUnfolderBase]: For 8919/8919 co-relation queries the response was YES. [2023-11-19 07:47:12,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11493 conditions, 2973 events. 2054/2973 cut-off events. For 8919/8919 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12660 event pairs, 759 based on Foata normal form. 20/2993 useless extension candidates. Maximal degree in co-relation 11386. Up to 1924 conditions per place. [2023-11-19 07:47:12,036 INFO L140 encePairwiseOnDemand]: 757/762 looper letters, 89 selfloop transitions, 13 changer transitions 18/120 dead transitions. [2023-11-19 07:47:12,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 120 transitions, 1006 flow [2023-11-19 07:47:12,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:47:12,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:47:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1700 transitions. [2023-11-19 07:47:12,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461942257217848 [2023-11-19 07:47:12,043 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1700 transitions. [2023-11-19 07:47:12,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1700 transitions. [2023-11-19 07:47:12,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:12,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1700 transitions. [2023-11-19 07:47:12,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 340.0) internal successors, (1700), 5 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:12,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 762.0) internal successors, (4572), 6 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:12,057 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 762.0) internal successors, (4572), 6 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:12,057 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 535 flow. Second operand 5 states and 1700 transitions. [2023-11-19 07:47:12,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 120 transitions, 1006 flow [2023-11-19 07:47:12,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 120 transitions, 1006 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:47:12,089 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 628 flow [2023-11-19 07:47:12,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=628, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2023-11-19 07:47:12,091 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 42 predicate places. [2023-11-19 07:47:12,091 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 628 flow [2023-11-19 07:47:12,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 331.6) internal successors, (1658), 5 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:12,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:12,092 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:12,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:47:12,092 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:47:12,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:12,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1430092380, now seen corresponding path program 5 times [2023-11-19 07:47:12,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:12,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632257766] [2023-11-19 07:47:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:12,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-19 07:47:12,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:12,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632257766] [2023-11-19 07:47:12,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632257766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:12,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:12,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:47:12,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598880700] [2023-11-19 07:47:12,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:12,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:47:12,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:12,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:47:12,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:47:12,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 762 [2023-11-19 07:47:12,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 628 flow. Second operand has 5 states, 5 states have (on average 330.6) internal successors, (1653), 5 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:12,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:12,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 762 [2023-11-19 07:47:12,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:13,071 INFO L124 PetriNetUnfolderBase]: 1978/2850 cut-off events. [2023-11-19 07:47:13,071 INFO L125 PetriNetUnfolderBase]: For 10967/10967 co-relation queries the response was YES. [2023-11-19 07:47:13,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11625 conditions, 2850 events. 1978/2850 cut-off events. For 10967/10967 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12014 event pairs, 655 based on Foata normal form. 36/2886 useless extension candidates. Maximal degree in co-relation 11515. Up to 1666 conditions per place. [2023-11-19 07:47:13,098 INFO L140 encePairwiseOnDemand]: 756/762 looper letters, 109 selfloop transitions, 15 changer transitions 5/129 dead transitions. [2023-11-19 07:47:13,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 129 transitions, 1118 flow [2023-11-19 07:47:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:47:13,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:47:13,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2028 transitions. [2023-11-19 07:47:13,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435695538057743 [2023-11-19 07:47:13,108 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2028 transitions. [2023-11-19 07:47:13,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2028 transitions. [2023-11-19 07:47:13,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:13,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2028 transitions. [2023-11-19 07:47:13,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 338.0) internal successors, (2028), 6 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 07:47:13,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 762.0) internal successors, (5334), 7 states have internal predecessors, (5334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:13,125 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 762.0) internal successors, (5334), 7 states have internal predecessors, (5334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:13,125 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 628 flow. Second operand 6 states and 2028 transitions. [2023-11-19 07:47:13,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 129 transitions, 1118 flow [2023-11-19 07:47:13,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 129 transitions, 1100 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:13,173 INFO L231 Difference]: Finished difference. Result has 80 places, 78 transitions, 644 flow [2023-11-19 07:47:13,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=644, PETRI_PLACES=80, PETRI_TRANSITIONS=78} [2023-11-19 07:47:13,174 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2023-11-19 07:47:13,175 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 78 transitions, 644 flow [2023-11-19 07:47:13,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 330.6) internal successors, (1653), 5 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:13,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:13,176 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:13,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:47:13,176 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:47:13,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:13,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1190174342, now seen corresponding path program 1 times [2023-11-19 07:47:13,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:13,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861915736] [2023-11-19 07:47:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:13,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-19 07:47:15,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:15,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861915736] [2023-11-19 07:47:15,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861915736] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:15,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508071855] [2023-11-19 07:47:15,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:15,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:15,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:15,164 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:15,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6bd964-4069-4245-ab3b-4e1f02546286/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:47:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:15,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 07:47:15,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:15,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:47:15,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:47:16,051 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:47:16,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2023-11-19 07:47:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-19 07:47:16,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:20,786 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_865 (Array Int Int)) (~o_2~0.offset Int) (~o_4~0.base Int) (~o_4~0.offset Int) (~o_2~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_865))) (let ((.cse0 (select .cse3 ~o_2~0.base)) (.cse2 (select .cse3 ~o_4~0.base))) (or (let ((.cse1 (* |c_thread2Thread1of1ForFork2_~i~1#1| 4))) (< (select .cse0 (+ .cse1 ~o_2~0.offset)) (+ (select .cse2 (+ .cse1 ~o_4~0.offset)) 1))) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| (+ (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) ~o_2~0.offset)) 1)) (< (select .cse2 ~o_4~0.offset) (select (select .cse3 c_~o_0~0.base) c_~o_0~0.offset)))))) is different from false [2023-11-19 07:47:20,811 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_865 (Array Int Int)) (~o_2~0.offset Int) (~o_4~0.base Int) (~o_4~0.offset Int) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_865))) (let ((.cse0 (select .cse2 ~o_2~0.base)) (.cse1 (select (select .cse2 ~o_4~0.base) ~o_4~0.offset))) (or (< |c_thread1Thread1of1ForFork1_#t~mem1#1| (+ (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) ~o_2~0.offset)) 1)) (< .cse1 (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset)) (< (select .cse0 ~o_2~0.offset) (+ .cse1 1)))))) is different from false [2023-11-19 07:47:20,989 INFO L349 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-11-19 07:47:20,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 188 treesize of output 233 [2023-11-19 07:47:21,064 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:47:21,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 120 treesize of output 154