./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/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_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/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_eabcc46d-b2b5-4150-b197-3d6901740069/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 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:42:22,564 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:42:22,713 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:42:22,717 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:42:22,717 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:42:22,757 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:42:22,759 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:42:22,760 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:42:22,761 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:42:22,766 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:42:22,767 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:42:22,768 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:42:22,768 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:42:22,770 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:42:22,770 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:42:22,771 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:42:22,771 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:42:22,771 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:42:22,772 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:42:22,772 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:42:22,772 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:42:22,773 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:42:22,773 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:42:22,773 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:42:22,774 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:42:22,774 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:42:22,775 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:42:22,775 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:42:22,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:42:22,776 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:42:22,777 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:42:22,777 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:42:22,778 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:42:22,778 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:42:22,778 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:42:22,778 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:42:22,778 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:42:22,779 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:42:22,779 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:42:22,779 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_eabcc46d-b2b5-4150-b197-3d6901740069/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a [2023-11-19 07:42:23,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:42:23,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:42:23,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:42:23,155 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:42:23,156 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:42:23,157 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2023-11-19 07:42:26,309 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:42:26,555 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:42:26,555 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2023-11-19 07:42:26,566 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/data/b61fd1533/be83d2ef8fe942dca810834437e44ec5/FLAGef2962501 [2023-11-19 07:42:26,582 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/data/b61fd1533/be83d2ef8fe942dca810834437e44ec5 [2023-11-19 07:42:26,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:42:26,587 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:42:26,588 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:42:26,589 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:42:26,598 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:42:26,599 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:42:26" (1/1) ... [2023-11-19 07:42:26,599 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cb21b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:26, skipping insertion in model container [2023-11-19 07:42:26,600 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:42:26" (1/1) ... [2023-11-19 07:42:26,624 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:42:26,800 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_eabcc46d-b2b5-4150-b197-3d6901740069/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2435,2448] [2023-11-19 07:42:26,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:42:26,826 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:42:26,847 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_eabcc46d-b2b5-4150-b197-3d6901740069/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2435,2448] [2023-11-19 07:42:26,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:42:26,871 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:42:26,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:26 WrapperNode [2023-11-19 07:42:26,872 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:42:26,873 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:42:26,873 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:42:26,873 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:42:26,880 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:26" (1/1) ... [2023-11-19 07:42:26,889 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:26" (1/1) ... [2023-11-19 07:42:26,919 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2023-11-19 07:42:26,922 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:42:26,923 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:42:26,923 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:42:26,923 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:42:26,932 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:26" (1/1) ... [2023-11-19 07:42:26,933 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:26" (1/1) ... [2023-11-19 07:42:26,936 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:26" (1/1) ... [2023-11-19 07:42:26,937 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:26" (1/1) ... [2023-11-19 07:42:26,946 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:26" (1/1) ... [2023-11-19 07:42:26,950 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:26" (1/1) ... [2023-11-19 07:42:26,952 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:26" (1/1) ... [2023-11-19 07:42:26,954 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:26" (1/1) ... [2023-11-19 07:42:26,957 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:42:26,958 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:42:26,958 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:42:26,958 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:42:26,959 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:26" (1/1) ... [2023-11-19 07:42:26,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:42:26,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:27,016 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:42:27,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:42:27,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:42:27,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:42:27,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:42:27,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:42:27,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:42:27,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:42:27,065 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:42:27,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:42:27,065 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:42:27,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:42:27,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:42:27,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:42:27,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:42:27,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:42:27,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:42:27,070 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 07:42:27,252 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:42:27,254 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:42:27,688 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:42:27,706 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:42:27,707 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 07:42:27,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:42:27 BoogieIcfgContainer [2023-11-19 07:42:27,714 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:42:27,718 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:42:27,719 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:42:27,723 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:42:27,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:42:26" (1/3) ... [2023-11-19 07:42:27,724 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae0c723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:42:27, skipping insertion in model container [2023-11-19 07:42:27,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:26" (2/3) ... [2023-11-19 07:42:27,726 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae0c723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:42:27, skipping insertion in model container [2023-11-19 07:42:27,728 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:42:27" (3/3) ... [2023-11-19 07:42:27,729 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2023-11-19 07:42:27,738 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:42:27,750 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:42:27,751 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:42:27,751 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:42:27,890 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:42:27,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 166 transitions, 353 flow [2023-11-19 07:42:28,049 INFO L124 PetriNetUnfolderBase]: 12/163 cut-off events. [2023-11-19 07:42:28,050 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:42:28,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 163 events. 12/163 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 124 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 121. Up to 2 conditions per place. [2023-11-19 07:42:28,061 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 166 transitions, 353 flow [2023-11-19 07:42:28,073 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 152 transitions, 322 flow [2023-11-19 07:42:28,077 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:42:28,100 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 152 transitions, 322 flow [2023-11-19 07:42:28,106 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 152 transitions, 322 flow [2023-11-19 07:42:28,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 152 transitions, 322 flow [2023-11-19 07:42:28,166 INFO L124 PetriNetUnfolderBase]: 12/152 cut-off events. [2023-11-19 07:42:28,166 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:42:28,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 152 events. 12/152 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 123 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 121. Up to 2 conditions per place. [2023-11-19 07:42:28,173 INFO L119 LiptonReduction]: Number of co-enabled transitions 2184 [2023-11-19 07:42:34,167 INFO L134 LiptonReduction]: Checked pairs total: 2275 [2023-11-19 07:42:34,167 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-11-19 07:42:34,183 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:42:34,191 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;@28756439, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:42:34,191 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:42:34,198 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:42:34,198 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-19 07:42:34,199 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:42:34,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:34,200 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] [2023-11-19 07:42:34,200 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 07:42:34,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:34,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1964970467, now seen corresponding path program 1 times [2023-11-19 07:42:34,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:34,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523581073] [2023-11-19 07:42:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:34,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:35,022 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 07:42:35,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:35,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523581073] [2023-11-19 07:42:35,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523581073] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:35,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:35,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:42:35,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739293138] [2023-11-19 07:42:35,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:35,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:42:35,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:35,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:42:35,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:42:35,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 322 [2023-11-19 07:42:35,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:35,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:35,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 322 [2023-11-19 07:42:35,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:35,284 INFO L124 PetriNetUnfolderBase]: 429/632 cut-off events. [2023-11-19 07:42:35,285 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-19 07:42:35,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1341 conditions, 632 events. 429/632 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1990 event pairs, 138 based on Foata normal form. 1/468 useless extension candidates. Maximal degree in co-relation 1030. Up to 389 conditions per place. [2023-11-19 07:42:35,293 INFO L140 encePairwiseOnDemand]: 317/322 looper letters, 38 selfloop transitions, 4 changer transitions 1/43 dead transitions. [2023-11-19 07:42:35,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 205 flow [2023-11-19 07:42:35,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:42:35,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:42:35,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-11-19 07:42:35,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505175983436853 [2023-11-19 07:42:35,314 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-11-19 07:42:35,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-11-19 07:42:35,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:35,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-11-19 07:42:35,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:35,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:35,338 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:35,340 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 488 transitions. [2023-11-19 07:42:35,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 205 flow [2023-11-19 07:42:35,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 43 transitions, 183 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:42:35,348 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-11-19 07:42:35,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-19 07:42:35,354 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-19 07:42:35,354 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-11-19 07:42:35,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:35,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:35,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:35,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:42:35,356 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 07:42:35,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:35,357 INFO L85 PathProgramCache]: Analyzing trace with hash -240952864, now seen corresponding path program 1 times [2023-11-19 07:42:35,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:35,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665889421] [2023-11-19 07:42:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:35,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:35,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:35,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665889421] [2023-11-19 07:42:35,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665889421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:35,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:35,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:42:35,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569595804] [2023-11-19 07:42:35,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:35,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:42:35,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:35,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:42:35,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:42:35,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2023-11-19 07:42:35,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 143.2) internal successors, (716), 5 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:35,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:35,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2023-11-19 07:42:35,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:35,942 INFO L124 PetriNetUnfolderBase]: 785/1177 cut-off events. [2023-11-19 07:42:35,942 INFO L125 PetriNetUnfolderBase]: For 212/212 co-relation queries the response was YES. [2023-11-19 07:42:35,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2817 conditions, 1177 events. 785/1177 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4342 event pairs, 457 based on Foata normal form. 46/1221 useless extension candidates. Maximal degree in co-relation 998. Up to 633 conditions per place. [2023-11-19 07:42:35,957 INFO L140 encePairwiseOnDemand]: 316/322 looper letters, 59 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2023-11-19 07:42:35,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 64 transitions, 312 flow [2023-11-19 07:42:35,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:42:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:42:35,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 753 transitions. [2023-11-19 07:42:35,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770186335403724 [2023-11-19 07:42:35,966 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 753 transitions. [2023-11-19 07:42:35,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 753 transitions. [2023-11-19 07:42:35,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:35,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 753 transitions. [2023-11-19 07:42:35,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.6) internal successors, (753), 5 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:35,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:35,982 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:35,983 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 5 states and 753 transitions. [2023-11-19 07:42:35,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 64 transitions, 312 flow [2023-11-19 07:42:35,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 64 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:42:35,988 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 114 flow [2023-11-19 07:42:35,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-19 07:42:35,990 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-11-19 07:42:35,990 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 114 flow [2023-11-19 07:42:35,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.2) internal successors, (716), 5 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:35,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:35,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:35,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:42:35,998 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 07:42:36,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:36,001 INFO L85 PathProgramCache]: Analyzing trace with hash -993690201, now seen corresponding path program 1 times [2023-11-19 07:42:36,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:36,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132790318] [2023-11-19 07:42:36,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:36,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:36,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:36,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132790318] [2023-11-19 07:42:36,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132790318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:36,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:36,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:42:36,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850163392] [2023-11-19 07:42:36,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:36,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:42:36,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:36,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:42:36,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:42:36,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 322 [2023-11-19 07:42:36,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 142.2) internal successors, (711), 5 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:36,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:36,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 322 [2023-11-19 07:42:36,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:36,483 INFO L124 PetriNetUnfolderBase]: 683/1045 cut-off events. [2023-11-19 07:42:36,483 INFO L125 PetriNetUnfolderBase]: For 574/574 co-relation queries the response was YES. [2023-11-19 07:42:36,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2661 conditions, 1045 events. 683/1045 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3871 event pairs, 417 based on Foata normal form. 46/1090 useless extension candidates. Maximal degree in co-relation 1602. Up to 633 conditions per place. [2023-11-19 07:42:36,494 INFO L140 encePairwiseOnDemand]: 316/322 looper letters, 55 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-11-19 07:42:36,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 318 flow [2023-11-19 07:42:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:42:36,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:42:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 746 transitions. [2023-11-19 07:42:36,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46335403726708074 [2023-11-19 07:42:36,499 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 746 transitions. [2023-11-19 07:42:36,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 746 transitions. [2023-11-19 07:42:36,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:36,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 746 transitions. [2023-11-19 07:42:36,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:36,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:36,509 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:36,509 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 114 flow. Second operand 5 states and 746 transitions. [2023-11-19 07:42:36,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 318 flow [2023-11-19 07:42:36,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 60 transitions, 314 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:42:36,514 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 137 flow [2023-11-19 07:42:36,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-19 07:42:36,516 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-11-19 07:42:36,520 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 137 flow [2023-11-19 07:42:36,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.2) internal successors, (711), 5 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:36,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:36,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:36,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:42:36,521 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 07:42:36,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:36,522 INFO L85 PathProgramCache]: Analyzing trace with hash 722286691, now seen corresponding path program 1 times [2023-11-19 07:42:36,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:36,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171845243] [2023-11-19 07:42:36,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:36,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:36,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:36,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171845243] [2023-11-19 07:42:36,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171845243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:36,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:36,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:42:36,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898994405] [2023-11-19 07:42:36,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:36,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:42:36,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:36,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:42:36,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:42:36,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 322 [2023-11-19 07:42:36,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 137 flow. Second operand has 5 states, 5 states have (on average 141.2) internal successors, (706), 5 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:36,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:36,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 322 [2023-11-19 07:42:36,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:37,022 INFO L124 PetriNetUnfolderBase]: 567/875 cut-off events. [2023-11-19 07:42:37,022 INFO L125 PetriNetUnfolderBase]: For 839/839 co-relation queries the response was YES. [2023-11-19 07:42:37,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2519 conditions, 875 events. 567/875 cut-off events. For 839/839 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3094 event pairs, 369 based on Foata normal form. 26/900 useless extension candidates. Maximal degree in co-relation 1778. Up to 633 conditions per place. [2023-11-19 07:42:37,029 INFO L140 encePairwiseOnDemand]: 316/322 looper letters, 26 selfloop transitions, 2 changer transitions 27/55 dead transitions. [2023-11-19 07:42:37,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 315 flow [2023-11-19 07:42:37,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:42:37,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:42:37,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 738 transitions. [2023-11-19 07:42:37,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583850931677019 [2023-11-19 07:42:37,034 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 738 transitions. [2023-11-19 07:42:37,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 738 transitions. [2023-11-19 07:42:37,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:37,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 738 transitions. [2023-11-19 07:42:37,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:37,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:37,044 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:37,045 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 137 flow. Second operand 5 states and 738 transitions. [2023-11-19 07:42:37,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 315 flow [2023-11-19 07:42:37,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 55 transitions, 310 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:42:37,049 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 110 flow [2023-11-19 07:42:37,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-11-19 07:42:37,051 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2023-11-19 07:42:37,051 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 110 flow [2023-11-19 07:42:37,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.2) internal successors, (706), 5 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:37,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:37,052 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 07:42:37,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:42:37,053 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 07:42:37,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:37,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1832637104, now seen corresponding path program 1 times [2023-11-19 07:42:37,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:37,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654246889] [2023-11-19 07:42:37,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:37,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:37,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:37,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654246889] [2023-11-19 07:42:37,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654246889] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:37,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902739292] [2023-11-19 07:42:37,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:37,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:37,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:37,214 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:37,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:42:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:37,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:42:37,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:37,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:37,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902739292] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:37,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:42:37,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-11-19 07:42:37,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975257492] [2023-11-19 07:42:37,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:37,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:42:37,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:37,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:42:37,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:42:37,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 322 [2023-11-19 07:42:37,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:37,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:37,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 322 [2023-11-19 07:42:37,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:38,038 INFO L124 PetriNetUnfolderBase]: 578/860 cut-off events. [2023-11-19 07:42:38,038 INFO L125 PetriNetUnfolderBase]: For 784/784 co-relation queries the response was YES. [2023-11-19 07:42:38,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2610 conditions, 860 events. 578/860 cut-off events. For 784/784 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3040 event pairs, 166 based on Foata normal form. 18/877 useless extension candidates. Maximal degree in co-relation 2591. Up to 421 conditions per place. [2023-11-19 07:42:38,047 INFO L140 encePairwiseOnDemand]: 314/322 looper letters, 62 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2023-11-19 07:42:38,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 71 transitions, 416 flow [2023-11-19 07:42:38,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:42:38,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:42:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 966 transitions. [2023-11-19 07:42:38,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-11-19 07:42:38,053 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 966 transitions. [2023-11-19 07:42:38,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 966 transitions. [2023-11-19 07:42:38,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:38,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 966 transitions. [2023-11-19 07:42:38,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 138.0) internal successors, (966), 7 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:38,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 322.0) internal successors, (2576), 8 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:38,064 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 322.0) internal successors, (2576), 8 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:38,064 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 110 flow. Second operand 7 states and 966 transitions. [2023-11-19 07:42:38,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 71 transitions, 416 flow [2023-11-19 07:42:38,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 71 transitions, 348 flow, removed 32 selfloop flow, removed 8 redundant places. [2023-11-19 07:42:38,074 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 141 flow [2023-11-19 07:42:38,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=141, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2023-11-19 07:42:38,075 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-11-19 07:42:38,075 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 141 flow [2023-11-19 07:42:38,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:38,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:38,076 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 07:42:38,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:38,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:38,298 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 07:42:38,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:38,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1236454032, now seen corresponding path program 2 times [2023-11-19 07:42:38,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:38,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710883087] [2023-11-19 07:42:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:38,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:38,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:38,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710883087] [2023-11-19 07:42:38,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710883087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:38,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736121928] [2023-11-19 07:42:38,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:42:38,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:38,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:38,473 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:38,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:42:38,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:42:38,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:42:38,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:42:38,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:38,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:38,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736121928] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:38,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:42:38,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-11-19 07:42:38,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882410185] [2023-11-19 07:42:38,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:38,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:42:38,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:38,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:42:38,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:42:38,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 322 [2023-11-19 07:42:38,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 141 flow. Second operand has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:38,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:38,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 322 [2023-11-19 07:42:38,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:39,246 INFO L124 PetriNetUnfolderBase]: 765/1141 cut-off events. [2023-11-19 07:42:39,246 INFO L125 PetriNetUnfolderBase]: For 1065/1065 co-relation queries the response was YES. [2023-11-19 07:42:39,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3471 conditions, 1141 events. 765/1141 cut-off events. For 1065/1065 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4244 event pairs, 264 based on Foata normal form. 14/1154 useless extension candidates. Maximal degree in co-relation 3449. Up to 665 conditions per place. [2023-11-19 07:42:39,257 INFO L140 encePairwiseOnDemand]: 314/322 looper letters, 64 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2023-11-19 07:42:39,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 76 transitions, 461 flow [2023-11-19 07:42:39,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:42:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:42:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 962 transitions. [2023-11-19 07:42:39,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42679680567879325 [2023-11-19 07:42:39,263 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 962 transitions. [2023-11-19 07:42:39,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 962 transitions. [2023-11-19 07:42:39,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:39,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 962 transitions. [2023-11-19 07:42:39,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 137.42857142857142) internal successors, (962), 7 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:39,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 322.0) internal successors, (2576), 8 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:39,277 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 322.0) internal successors, (2576), 8 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:39,277 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 141 flow. Second operand 7 states and 962 transitions. [2023-11-19 07:42:39,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 76 transitions, 461 flow [2023-11-19 07:42:39,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 76 transitions, 426 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-11-19 07:42:39,284 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 198 flow [2023-11-19 07:42:39,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-19 07:42:39,288 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2023-11-19 07:42:39,288 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 198 flow [2023-11-19 07:42:39,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:39,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:39,289 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 07:42:39,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:39,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:42:39,511 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 07:42:39,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:39,512 INFO L85 PathProgramCache]: Analyzing trace with hash 749844316, now seen corresponding path program 3 times [2023-11-19 07:42:39,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:39,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173739286] [2023-11-19 07:42:39,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:39,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:39,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:39,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173739286] [2023-11-19 07:42:39,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173739286] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:39,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293733585] [2023-11-19 07:42:39,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:42:39,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:39,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:39,732 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:39,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:42:39,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:42:39,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:42:39,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:42:39,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:39,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:40,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293733585] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:40,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:42:40,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2023-11-19 07:42:40,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719567758] [2023-11-19 07:42:40,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:40,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:42:40,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:40,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:42:40,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:42:40,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 322 [2023-11-19 07:42:40,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:40,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:40,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 322 [2023-11-19 07:42:40,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:40,530 INFO L124 PetriNetUnfolderBase]: 887/1330 cut-off events. [2023-11-19 07:42:40,531 INFO L125 PetriNetUnfolderBase]: For 2448/2448 co-relation queries the response was YES. [2023-11-19 07:42:40,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4687 conditions, 1330 events. 887/1330 cut-off events. For 2448/2448 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5163 event pairs, 362 based on Foata normal form. 18/1347 useless extension candidates. Maximal degree in co-relation 4662. Up to 942 conditions per place. [2023-11-19 07:42:40,545 INFO L140 encePairwiseOnDemand]: 314/322 looper letters, 62 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2023-11-19 07:42:40,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 79 transitions, 541 flow [2023-11-19 07:42:40,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:42:40,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:42:40,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 963 transitions. [2023-11-19 07:42:40,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4272404614019521 [2023-11-19 07:42:40,551 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 963 transitions. [2023-11-19 07:42:40,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 963 transitions. [2023-11-19 07:42:40,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:40,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 963 transitions. [2023-11-19 07:42:40,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 137.57142857142858) internal successors, (963), 7 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:40,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 322.0) internal successors, (2576), 8 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:40,562 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 322.0) internal successors, (2576), 8 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:40,562 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 198 flow. Second operand 7 states and 963 transitions. [2023-11-19 07:42:40,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 79 transitions, 541 flow [2023-11-19 07:42:40,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 79 transitions, 500 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-11-19 07:42:40,573 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 295 flow [2023-11-19 07:42:40,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=295, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-11-19 07:42:40,574 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2023-11-19 07:42:40,574 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 295 flow [2023-11-19 07:42:40,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:40,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:40,575 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 07:42:40,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:40,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:42:40,798 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 07:42:40,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:40,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1028997136, now seen corresponding path program 4 times [2023-11-19 07:42:40,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:40,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802583233] [2023-11-19 07:42:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:40,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:41,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:41,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802583233] [2023-11-19 07:42:41,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802583233] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:41,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322691445] [2023-11-19 07:42:41,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:42:41,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:41,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:41,038 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:41,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:42:41,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:42:41,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:42:41,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:42:41,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:41,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:41,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322691445] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:41,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:42:41,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-19 07:42:41,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946680926] [2023-11-19 07:42:41,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:41,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:42:41,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:41,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:42:41,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:42:41,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 322 [2023-11-19 07:42:41,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 295 flow. Second operand has 14 states, 14 states have (on average 127.71428571428571) internal successors, (1788), 14 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:41,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:41,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 322 [2023-11-19 07:42:41,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:42,567 INFO L124 PetriNetUnfolderBase]: 869/1312 cut-off events. [2023-11-19 07:42:42,567 INFO L125 PetriNetUnfolderBase]: For 3539/3539 co-relation queries the response was YES. [2023-11-19 07:42:42,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5094 conditions, 1312 events. 869/1312 cut-off events. For 3539/3539 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5299 event pairs, 166 based on Foata normal form. 18/1329 useless extension candidates. Maximal degree in co-relation 5066. Up to 459 conditions per place. [2023-11-19 07:42:42,580 INFO L140 encePairwiseOnDemand]: 311/322 looper letters, 104 selfloop transitions, 71 changer transitions 0/175 dead transitions. [2023-11-19 07:42:42,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 175 transitions, 1382 flow [2023-11-19 07:42:42,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:42:42,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-19 07:42:42,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2372 transitions. [2023-11-19 07:42:42,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40924775707384403 [2023-11-19 07:42:42,590 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2372 transitions. [2023-11-19 07:42:42,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2372 transitions. [2023-11-19 07:42:42,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:42,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2372 transitions. [2023-11-19 07:42:42,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 131.77777777777777) internal successors, (2372), 18 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:42,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 322.0) internal successors, (6118), 19 states have internal predecessors, (6118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:42,615 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 322.0) internal successors, (6118), 19 states have internal predecessors, (6118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:42,615 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 295 flow. Second operand 18 states and 2372 transitions. [2023-11-19 07:42:42,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 175 transitions, 1382 flow [2023-11-19 07:42:42,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 175 transitions, 1262 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-11-19 07:42:42,629 INFO L231 Difference]: Finished difference. Result has 64 places, 100 transitions, 832 flow [2023-11-19 07:42:42,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=832, PETRI_PLACES=64, PETRI_TRANSITIONS=100} [2023-11-19 07:42:42,630 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2023-11-19 07:42:42,630 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 100 transitions, 832 flow [2023-11-19 07:42:42,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 127.71428571428571) internal successors, (1788), 14 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:42,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:42,632 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 07:42:42,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:42,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:42:42,857 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 07:42:42,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:42,857 INFO L85 PathProgramCache]: Analyzing trace with hash -135557878, now seen corresponding path program 5 times [2023-11-19 07:42:42,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:42,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283809271] [2023-11-19 07:42:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:42,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:43,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:43,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283809271] [2023-11-19 07:42:43,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283809271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:43,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68985241] [2023-11-19 07:42:43,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:42:43,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:43,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:43,017 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:43,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:42:43,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:42:43,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:42:43,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:42:43,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:43,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:43,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68985241] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:43,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:42:43,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-19 07:42:43,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756317907] [2023-11-19 07:42:43,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:43,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:42:43,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:43,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:42:43,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:42:43,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 322 [2023-11-19 07:42:43,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 100 transitions, 832 flow. Second operand has 15 states, 15 states have (on average 128.0) internal successors, (1920), 15 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:43,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:43,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 322 [2023-11-19 07:42:43,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:44,420 INFO L124 PetriNetUnfolderBase]: 850/1272 cut-off events. [2023-11-19 07:42:44,421 INFO L125 PetriNetUnfolderBase]: For 3826/3826 co-relation queries the response was YES. [2023-11-19 07:42:44,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5454 conditions, 1272 events. 850/1272 cut-off events. For 3826/3826 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4967 event pairs, 208 based on Foata normal form. 14/1286 useless extension candidates. Maximal degree in co-relation 5423. Up to 622 conditions per place. [2023-11-19 07:42:44,436 INFO L140 encePairwiseOnDemand]: 311/322 looper letters, 86 selfloop transitions, 75 changer transitions 0/161 dead transitions. [2023-11-19 07:42:44,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 161 transitions, 1405 flow [2023-11-19 07:42:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:42:44,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:42:44,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1844 transitions. [2023-11-19 07:42:44,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090505767524401 [2023-11-19 07:42:44,446 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1844 transitions. [2023-11-19 07:42:44,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1844 transitions. [2023-11-19 07:42:44,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:44,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1844 transitions. [2023-11-19 07:42:44,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 131.71428571428572) internal successors, (1844), 14 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:44,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 322.0) internal successors, (4830), 15 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:44,466 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 322.0) internal successors, (4830), 15 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:44,466 INFO L175 Difference]: Start difference. First operand has 64 places, 100 transitions, 832 flow. Second operand 14 states and 1844 transitions. [2023-11-19 07:42:44,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 161 transitions, 1405 flow [2023-11-19 07:42:44,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 161 transitions, 1270 flow, removed 42 selfloop flow, removed 4 redundant places. [2023-11-19 07:42:44,499 INFO L231 Difference]: Finished difference. Result has 75 places, 118 transitions, 985 flow [2023-11-19 07:42:44,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=985, PETRI_PLACES=75, PETRI_TRANSITIONS=118} [2023-11-19 07:42:44,501 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2023-11-19 07:42:44,501 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 118 transitions, 985 flow [2023-11-19 07:42:44,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 128.0) internal successors, (1920), 15 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:44,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:44,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:44,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:44,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:44,732 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 07:42:44,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:44,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1458128046, now seen corresponding path program 6 times [2023-11-19 07:42:44,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:44,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682957095] [2023-11-19 07:42:44,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:44,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:45,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:45,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682957095] [2023-11-19 07:42:45,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682957095] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:45,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858451673] [2023-11-19 07:42:45,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:42:45,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:45,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:45,011 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:45,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:42:45,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 07:42:45,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:42:45,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:42:45,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:45,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:45,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858451673] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:45,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:42:45,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2023-11-19 07:42:45,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714663910] [2023-11-19 07:42:45,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:45,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:42:45,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:45,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:42:45,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:42:45,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 322 [2023-11-19 07:42:45,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 118 transitions, 985 flow. Second operand has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:45,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:45,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 322 [2023-11-19 07:42:45,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:45,948 INFO L124 PetriNetUnfolderBase]: 831/1232 cut-off events. [2023-11-19 07:42:45,948 INFO L125 PetriNetUnfolderBase]: For 4069/4069 co-relation queries the response was YES. [2023-11-19 07:42:45,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5487 conditions, 1232 events. 831/1232 cut-off events. For 4069/4069 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4667 event pairs, 214 based on Foata normal form. 14/1246 useless extension candidates. Maximal degree in co-relation 5452. Up to 697 conditions per place. [2023-11-19 07:42:45,963 INFO L140 encePairwiseOnDemand]: 314/322 looper letters, 89 selfloop transitions, 50 changer transitions 0/139 dead transitions. [2023-11-19 07:42:45,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 139 transitions, 1309 flow [2023-11-19 07:42:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:42:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:42:45,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 963 transitions. [2023-11-19 07:42:45,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4272404614019521 [2023-11-19 07:42:45,968 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 963 transitions. [2023-11-19 07:42:45,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 963 transitions. [2023-11-19 07:42:45,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:45,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 963 transitions. [2023-11-19 07:42:45,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 137.57142857142858) internal successors, (963), 7 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:45,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 322.0) internal successors, (2576), 8 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:45,979 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 322.0) internal successors, (2576), 8 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:45,979 INFO L175 Difference]: Start difference. First operand has 75 places, 118 transitions, 985 flow. Second operand 7 states and 963 transitions. [2023-11-19 07:42:45,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 139 transitions, 1309 flow [2023-11-19 07:42:46,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 139 transitions, 1226 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-19 07:42:46,004 INFO L231 Difference]: Finished difference. Result has 73 places, 114 transitions, 966 flow [2023-11-19 07:42:46,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=966, PETRI_PLACES=73, PETRI_TRANSITIONS=114} [2023-11-19 07:42:46,005 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2023-11-19 07:42:46,006 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 114 transitions, 966 flow [2023-11-19 07:42:46,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:46,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:46,007 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 07:42:46,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:46,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:42:46,230 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 07:42:46,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:46,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1518046493, now seen corresponding path program 1 times [2023-11-19 07:42:46,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:46,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376982795] [2023-11-19 07:42:46,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:46,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:46,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:46,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376982795] [2023-11-19 07:42:46,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376982795] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:46,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461691149] [2023-11-19 07:42:46,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:46,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:46,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:46,363 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:46,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:42:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:46,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:42:46,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:46,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:46,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461691149] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:46,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:42:46,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-11-19 07:42:46,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868416599] [2023-11-19 07:42:46,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:46,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:42:46,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:46,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:42:46,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:42:46,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 322 [2023-11-19 07:42:46,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 114 transitions, 966 flow. Second operand has 5 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:46,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:46,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 322 [2023-11-19 07:42:46,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:46,942 INFO L124 PetriNetUnfolderBase]: 788/1157 cut-off events. [2023-11-19 07:42:46,942 INFO L125 PetriNetUnfolderBase]: For 3843/3843 co-relation queries the response was YES. [2023-11-19 07:42:46,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5028 conditions, 1157 events. 788/1157 cut-off events. For 3843/3843 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4204 event pairs, 242 based on Foata normal form. 70/1227 useless extension candidates. Maximal degree in co-relation 4993. Up to 923 conditions per place. [2023-11-19 07:42:46,956 INFO L140 encePairwiseOnDemand]: 317/322 looper letters, 124 selfloop transitions, 14 changer transitions 0/138 dead transitions. [2023-11-19 07:42:46,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 138 transitions, 1432 flow [2023-11-19 07:42:46,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:42:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:42:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 718 transitions. [2023-11-19 07:42:46,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44596273291925465 [2023-11-19 07:42:46,961 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 718 transitions. [2023-11-19 07:42:46,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 718 transitions. [2023-11-19 07:42:46,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:46,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 718 transitions. [2023-11-19 07:42:46,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:46,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:46,970 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:46,971 INFO L175 Difference]: Start difference. First operand has 73 places, 114 transitions, 966 flow. Second operand 5 states and 718 transitions. [2023-11-19 07:42:46,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 138 transitions, 1432 flow [2023-11-19 07:42:46,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 138 transitions, 1310 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-11-19 07:42:46,991 INFO L231 Difference]: Finished difference. Result has 72 places, 115 transitions, 924 flow [2023-11-19 07:42:46,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=924, PETRI_PLACES=72, PETRI_TRANSITIONS=115} [2023-11-19 07:42:46,992 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2023-11-19 07:42:46,993 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 115 transitions, 924 flow [2023-11-19 07:42:46,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:46,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:46,994 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 07:42:47,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:47,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:47,207 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:42:47,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:47,207 INFO L85 PathProgramCache]: Analyzing trace with hash 141376400, now seen corresponding path program 1 times [2023-11-19 07:42:47,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:47,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559269821] [2023-11-19 07:42:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:47,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:48,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:48,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559269821] [2023-11-19 07:42:48,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559269821] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:48,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853059748] [2023-11-19 07:42:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:48,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:48,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:48,581 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:48,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:42:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:48,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-19 07:42:48,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:48,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:42:48,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:42:48,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 07:42:48,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:42:49,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:42:49,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:42:49,334 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 07:42:49,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 07:42:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:49,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:50,475 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:42:50,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 52 [2023-11-19 07:42:50,537 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:42:50,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15734 treesize of output 14718 [2023-11-19 07:42:50,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 196 [2023-11-19 07:42:50,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:42:50,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 92 [2023-11-19 07:42:50,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:42:50,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 91 [2023-11-19 07:42:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:54,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853059748] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:54,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:42:54,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-11-19 07:42:54,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713871659] [2023-11-19 07:42:54,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:54,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-19 07:42:54,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:54,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-19 07:42:54,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=666, Unknown=9, NotChecked=0, Total=812 [2023-11-19 07:42:57,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 322 [2023-11-19 07:42:57,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 115 transitions, 924 flow. Second operand has 29 states, 29 states have (on average 87.37931034482759) internal successors, (2534), 29 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:57,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:57,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 322 [2023-11-19 07:42:57,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:59,723 INFO L124 PetriNetUnfolderBase]: 1423/2088 cut-off events. [2023-11-19 07:42:59,723 INFO L125 PetriNetUnfolderBase]: For 6165/6165 co-relation queries the response was YES. [2023-11-19 07:42:59,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9527 conditions, 2088 events. 1423/2088 cut-off events. For 6165/6165 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8581 event pairs, 187 based on Foata normal form. 2/2090 useless extension candidates. Maximal degree in co-relation 8374. Up to 1283 conditions per place. [2023-11-19 07:42:59,753 INFO L140 encePairwiseOnDemand]: 311/322 looper letters, 239 selfloop transitions, 131 changer transitions 5/375 dead transitions. [2023-11-19 07:42:59,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 375 transitions, 3723 flow [2023-11-19 07:42:59,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:42:59,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:42:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1152 transitions. [2023-11-19 07:42:59,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2981366459627329 [2023-11-19 07:42:59,760 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1152 transitions. [2023-11-19 07:42:59,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1152 transitions. [2023-11-19 07:42:59,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:59,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1152 transitions. [2023-11-19 07:42:59,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 96.0) internal successors, (1152), 12 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:59,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 322.0) internal successors, (4186), 13 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:59,773 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 322.0) internal successors, (4186), 13 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:59,773 INFO L175 Difference]: Start difference. First operand has 72 places, 115 transitions, 924 flow. Second operand 12 states and 1152 transitions. [2023-11-19 07:42:59,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 375 transitions, 3723 flow [2023-11-19 07:42:59,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 375 transitions, 3686 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-19 07:42:59,819 INFO L231 Difference]: Finished difference. Result has 87 places, 219 transitions, 2255 flow [2023-11-19 07:42:59,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2255, PETRI_PLACES=87, PETRI_TRANSITIONS=219} [2023-11-19 07:42:59,821 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2023-11-19 07:42:59,821 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 219 transitions, 2255 flow [2023-11-19 07:42:59,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 87.37931034482759) internal successors, (2534), 29 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:59,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:59,823 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 07:42:59,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:43:00,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:43:00,045 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 07:43:00,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:00,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1664753508, now seen corresponding path program 1 times [2023-11-19 07:43:00,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:00,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874607368] [2023-11-19 07:43:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:00,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:01,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:01,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874607368] [2023-11-19 07:43:01,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874607368] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:43:01,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867308507] [2023-11-19 07:43:01,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:01,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:01,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:01,065 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:43:01,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:43:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:01,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-19 07:43:01,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:43:01,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:43:01,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:43:01,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:43:01,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:43:01,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 07:43:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:01,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:43:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:43:01,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867308507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:43:01,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:43:01,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 4] total 17 [2023-11-19 07:43:01,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717217316] [2023-11-19 07:43:01,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:43:01,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:43:01,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:01,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:43:01,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:43:02,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 322 [2023-11-19 07:43:02,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 219 transitions, 2255 flow. Second operand has 19 states, 19 states have (on average 121.78947368421052) internal successors, (2314), 19 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:02,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:02,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 322 [2023-11-19 07:43:02,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:03,652 INFO L124 PetriNetUnfolderBase]: 2141/3131 cut-off events. [2023-11-19 07:43:03,652 INFO L125 PetriNetUnfolderBase]: For 12790/12790 co-relation queries the response was YES. [2023-11-19 07:43:03,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16567 conditions, 3131 events. 2141/3131 cut-off events. For 12790/12790 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14074 event pairs, 261 based on Foata normal form. 1/3132 useless extension candidates. Maximal degree in co-relation 16214. Up to 1995 conditions per place. [2023-11-19 07:43:03,677 INFO L140 encePairwiseOnDemand]: 310/322 looper letters, 247 selfloop transitions, 196 changer transitions 1/444 dead transitions. [2023-11-19 07:43:03,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 444 transitions, 5341 flow [2023-11-19 07:43:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:43:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:43:03,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1165 transitions. [2023-11-19 07:43:03,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40200138026224985 [2023-11-19 07:43:03,682 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1165 transitions. [2023-11-19 07:43:03,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1165 transitions. [2023-11-19 07:43:03,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:03,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1165 transitions. [2023-11-19 07:43:03,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 129.44444444444446) internal successors, (1165), 9 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:03,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 322.0) internal successors, (3220), 10 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:03,693 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 322.0) internal successors, (3220), 10 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:03,693 INFO L175 Difference]: Start difference. First operand has 87 places, 219 transitions, 2255 flow. Second operand 9 states and 1165 transitions. [2023-11-19 07:43:03,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 444 transitions, 5341 flow [2023-11-19 07:43:03,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 444 transitions, 5082 flow, removed 103 selfloop flow, removed 2 redundant places. [2023-11-19 07:43:03,795 INFO L231 Difference]: Finished difference. Result has 97 places, 328 transitions, 3880 flow [2023-11-19 07:43:03,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3880, PETRI_PLACES=97, PETRI_TRANSITIONS=328} [2023-11-19 07:43:03,796 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 67 predicate places. [2023-11-19 07:43:03,796 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 328 transitions, 3880 flow [2023-11-19 07:43:03,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 121.78947368421052) internal successors, (2314), 19 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:03,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:03,797 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 07:43:03,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:43:04,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:04,007 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 07:43:04,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:04,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1235645630, now seen corresponding path program 2 times [2023-11-19 07:43:04,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:04,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225770333] [2023-11-19 07:43:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:04,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:43:04,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:04,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225770333] [2023-11-19 07:43:04,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225770333] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:43:04,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792610337] [2023-11-19 07:43:04,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:43:04,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:04,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:04,659 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:43:04,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:43:04,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:43:04,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:43:04,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 07:43:04,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:43:04,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:43:04,997 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 07:43:05,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 07:43:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:43:05,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:43:05,275 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:43:05,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 44 [2023-11-19 07:43:05,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-19 07:43:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:43:05,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792610337] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:43:05,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:43:05,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-19 07:43:05,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565606371] [2023-11-19 07:43:05,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:43:05,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:43:05,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:43:05,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:43:05,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=296, Unknown=6, NotChecked=0, Total=380 [2023-11-19 07:43:06,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 322 [2023-11-19 07:43:06,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 328 transitions, 3880 flow. Second operand has 20 states, 20 states have (on average 111.8) internal successors, (2236), 20 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:06,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:43:06,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 322 [2023-11-19 07:43:06,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:43:07,286 INFO L124 PetriNetUnfolderBase]: 2549/3718 cut-off events. [2023-11-19 07:43:07,286 INFO L125 PetriNetUnfolderBase]: For 19515/19515 co-relation queries the response was YES. [2023-11-19 07:43:07,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21835 conditions, 3718 events. 2549/3718 cut-off events. For 19515/19515 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 17266 event pairs, 302 based on Foata normal form. 1/3719 useless extension candidates. Maximal degree in co-relation 21494. Up to 1953 conditions per place. [2023-11-19 07:43:07,328 INFO L140 encePairwiseOnDemand]: 312/322 looper letters, 212 selfloop transitions, 279 changer transitions 1/492 dead transitions. [2023-11-19 07:43:07,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 492 transitions, 6518 flow [2023-11-19 07:43:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:43:07,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:43:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 965 transitions. [2023-11-19 07:43:07,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37461180124223603 [2023-11-19 07:43:07,335 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 965 transitions. [2023-11-19 07:43:07,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 965 transitions. [2023-11-19 07:43:07,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:43:07,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 965 transitions. [2023-11-19 07:43:07,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.625) internal successors, (965), 8 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:07,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 322.0) internal successors, (2898), 9 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:07,345 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 322.0) internal successors, (2898), 9 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:07,346 INFO L175 Difference]: Start difference. First operand has 97 places, 328 transitions, 3880 flow. Second operand 8 states and 965 transitions. [2023-11-19 07:43:07,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 492 transitions, 6518 flow [2023-11-19 07:43:07,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 492 transitions, 6403 flow, removed 55 selfloop flow, removed 2 redundant places. [2023-11-19 07:43:07,582 INFO L231 Difference]: Finished difference. Result has 105 places, 388 transitions, 5397 flow [2023-11-19 07:43:07,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5397, PETRI_PLACES=105, PETRI_TRANSITIONS=388} [2023-11-19 07:43:07,583 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 75 predicate places. [2023-11-19 07:43:07,584 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 388 transitions, 5397 flow [2023-11-19 07:43:07,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 111.8) internal successors, (2236), 20 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:43:07,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:43:07,586 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 07:43:07,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:43:07,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:43:07,799 INFO L420 AbstractCegarLoop]: === Iteration 15 === 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 07:43:07,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:07,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1384459942, now seen corresponding path program 2 times [2023-11-19 07:43:07,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:07,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031415315] [2023-11-19 07:43:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:07,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:43:08,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:43:08,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031415315] [2023-11-19 07:43:08,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031415315] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:43:08,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753670575] [2023-11-19 07:43:08,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:43:08,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:08,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:08,967 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:43:08,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eabcc46d-b2b5-4150-b197-3d6901740069/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:43:09,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:43:09,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:43:09,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 07:43:09,112 INFO L285 TraceCheckSpWp]: Computing forward predicates...