./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:11:31,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:11:31,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:11:31,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:11:31,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:11:31,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:11:31,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:11:31,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:11:31,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:11:31,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:11:32,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:11:32,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:11:32,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:11:32,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:11:32,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:11:32,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:11:32,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:11:32,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:11:32,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:11:32,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:11:32,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:11:32,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:11:32,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:11:32,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:11:32,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:11:32,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:11:32,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:11:32,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:11:32,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:11:32,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:11:32,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:11:32,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:11:32,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:11:32,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:11:32,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:11:32,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:11:32,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:11:32,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:11:32,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:11:32,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:11:32,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:11:32,039 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:11:32,072 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:11:32,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:11:32,073 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:11:32,073 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:11:32,074 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:11:32,074 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:11:32,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:11:32,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:11:32,075 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:11:32,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:11:32,076 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:11:32,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:11:32,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:11:32,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:11:32,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:11:32,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:11:32,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:11:32,078 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:11:32,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:11:32,078 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:11:32,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:11:32,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:11:32,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:11:32,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:11:32,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:11:32,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:11:32,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:11:32,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:11:32,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:11:32,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:11:32,081 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:11:32,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:11:32,082 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:11:32,082 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:11:32,082 INFO L138 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_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 [2022-11-25 17:11:32,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:11:32,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:11:32,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:11:32,497 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:11:32,497 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:11:32,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2022-11-25 17:11:35,922 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:11:36,172 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:11:36,173 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2022-11-25 17:11:36,182 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/data/cab3506a2/a5ceda06ee71484d90c11c6190105c2b/FLAGc02a84e0a [2022-11-25 17:11:36,200 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/data/cab3506a2/a5ceda06ee71484d90c11c6190105c2b [2022-11-25 17:11:36,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:11:36,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:11:36,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:11:36,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:11:36,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:11:36,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:11:36" (1/1) ... [2022-11-25 17:11:36,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@373cf0b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:36, skipping insertion in model container [2022-11-25 17:11:36,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:11:36" (1/1) ... [2022-11-25 17:11:36,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:11:36,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:11:36,579 WARN L237 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_658b8652-49ec-4bc5-b215-964ea0e40e31/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2022-11-25 17:11:36,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:11:36,618 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:11:36,679 WARN L237 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_658b8652-49ec-4bc5-b215-964ea0e40e31/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2022-11-25 17:11:36,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:11:36,705 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:11:36,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:36 WrapperNode [2022-11-25 17:11:36,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:11:36,708 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:11:36,708 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:11:36,708 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:11:36,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:36" (1/1) ... [2022-11-25 17:11:36,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:36" (1/1) ... [2022-11-25 17:11:36,761 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 214 [2022-11-25 17:11:36,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:11:36,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:11:36,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:11:36,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:11:36,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:36" (1/1) ... [2022-11-25 17:11:36,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:36" (1/1) ... [2022-11-25 17:11:36,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:36" (1/1) ... [2022-11-25 17:11:36,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:36" (1/1) ... [2022-11-25 17:11:36,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:36" (1/1) ... [2022-11-25 17:11:36,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:36" (1/1) ... [2022-11-25 17:11:36,793 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:36" (1/1) ... [2022-11-25 17:11:36,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:36" (1/1) ... [2022-11-25 17:11:36,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:11:36,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:11:36,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:11:36,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:11:36,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:36" (1/1) ... [2022-11-25 17:11:36,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:11:36,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:36,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:11:36,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:11:36,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:11:36,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:11:36,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:11:36,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:11:36,894 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:11:36,894 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:11:36,894 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:11:36,894 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:11:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:11:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:11:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:11:36,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:11:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:11:36,897 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:11:37,017 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:11:37,019 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:11:37,490 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:11:37,504 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:11:37,504 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:11:37,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:11:37 BoogieIcfgContainer [2022-11-25 17:11:37,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:11:37,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:11:37,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:11:37,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:11:37,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:11:36" (1/3) ... [2022-11-25 17:11:37,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c72bd9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:11:37, skipping insertion in model container [2022-11-25 17:11:37,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:36" (2/3) ... [2022-11-25 17:11:37,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c72bd9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:11:37, skipping insertion in model container [2022-11-25 17:11:37,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:11:37" (3/3) ... [2022-11-25 17:11:37,518 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2022-11-25 17:11:37,529 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:11:37,543 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:11:37,543 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:11:37,543 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:11:37,690 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:11:37,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 273 transitions, 562 flow [2022-11-25 17:11:37,994 INFO L130 PetriNetUnfolder]: 19/271 cut-off events. [2022-11-25 17:11:38,003 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:11:38,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 271 events. 19/271 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 489 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 176. Up to 2 conditions per place. [2022-11-25 17:11:38,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 273 transitions, 562 flow [2022-11-25 17:11:38,022 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 262 transitions, 536 flow [2022-11-25 17:11:38,026 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:11:38,053 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 250 places, 262 transitions, 536 flow [2022-11-25 17:11:38,058 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 250 places, 262 transitions, 536 flow [2022-11-25 17:11:38,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 250 places, 262 transitions, 536 flow [2022-11-25 17:11:38,145 INFO L130 PetriNetUnfolder]: 19/262 cut-off events. [2022-11-25 17:11:38,146 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:11:38,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 262 events. 19/262 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 488 event pairs, 0 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 176. Up to 2 conditions per place. [2022-11-25 17:11:38,156 INFO L119 LiptonReduction]: Number of co-enabled transitions 11900 [2022-11-25 17:11:50,250 INFO L134 LiptonReduction]: Checked pairs total: 10796 [2022-11-25 17:11:50,250 INFO L136 LiptonReduction]: Total number of compositions: 310 [2022-11-25 17:11:50,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:11:50,278 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1b035197, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:11:50,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 17:11:50,286 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-11-25 17:11:50,286 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:11:50,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:11:50,287 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:50,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:11:50,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:50,295 INFO L85 PathProgramCache]: Analyzing trace with hash 455895334, now seen corresponding path program 1 times [2022-11-25 17:11:50,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:50,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052794675] [2022-11-25 17:11:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:50,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:50,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:50,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052794675] [2022-11-25 17:11:50,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052794675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:50,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:50,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:11:50,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353164469] [2022-11-25 17:11:50,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:50,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:11:50,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:50,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:11:50,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:11:50,885 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 583 [2022-11-25 17:11:50,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:50,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:11:50,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 583 [2022-11-25 17:11:50,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:11:50,958 INFO L130 PetriNetUnfolder]: 41/76 cut-off events. [2022-11-25 17:11:50,958 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:11:50,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 76 events. 41/76 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 128 event pairs, 24 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2022-11-25 17:11:50,960 INFO L137 encePairwiseOnDemand]: 580/583 looper letters, 16 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2022-11-25 17:11:50,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 84 flow [2022-11-25 17:11:50,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:11:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:11:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 769 transitions. [2022-11-25 17:11:50,980 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4396798170383076 [2022-11-25 17:11:50,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 769 transitions. [2022-11-25 17:11:50,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 769 transitions. [2022-11-25 17:11:50,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:11:50,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 769 transitions. [2022-11-25 17:11:50,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:51,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:51,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:51,005 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 769 transitions. [2022-11-25 17:11:51,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 84 flow [2022-11-25 17:11:51,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 76 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:11:51,010 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2022-11-25 17:11:51,013 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2022-11-25 17:11:51,017 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2022-11-25 17:11:51,017 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2022-11-25 17:11:51,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:51,018 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:11:51,019 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:51,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:11:51,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:11:51,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:51,021 INFO L85 PathProgramCache]: Analyzing trace with hash 549723672, now seen corresponding path program 1 times [2022-11-25 17:11:51,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:51,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524905663] [2022-11-25 17:11:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:51,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:51,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:51,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524905663] [2022-11-25 17:11:51,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524905663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:11:51,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601497821] [2022-11-25 17:11:51,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:51,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:51,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:51,208 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:51,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:11:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:51,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:11:51,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:51,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:11:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:51,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601497821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:11:51,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:11:51,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 17:11:51,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552539038] [2022-11-25 17:11:51,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:11:51,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:11:51,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:51,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:11:51,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:11:51,591 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 583 [2022-11-25 17:11:51,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 7 states, 7 states have (on average 251.0) internal successors, (1757), 7 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:51,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:11:51,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 583 [2022-11-25 17:11:51,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:11:51,732 INFO L130 PetriNetUnfolder]: 41/78 cut-off events. [2022-11-25 17:11:51,732 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:11:51,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 78 events. 41/78 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 128 event pairs, 24 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 160. Up to 76 conditions per place. [2022-11-25 17:11:51,734 INFO L137 encePairwiseOnDemand]: 580/583 looper letters, 16 selfloop transitions, 4 changer transitions 0/20 dead transitions. [2022-11-25 17:11:51,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 20 transitions, 98 flow [2022-11-25 17:11:51,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:11:51,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:11:51,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1262 transitions. [2022-11-25 17:11:51,740 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4329331046312178 [2022-11-25 17:11:51,740 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1262 transitions. [2022-11-25 17:11:51,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1262 transitions. [2022-11-25 17:11:51,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:11:51,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1262 transitions. [2022-11-25 17:11:51,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 252.4) internal successors, (1262), 5 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:51,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:51,756 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:51,757 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 1262 transitions. [2022-11-25 17:11:51,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 20 transitions, 98 flow [2022-11-25 17:11:51,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 20 transitions, 94 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:11:51,759 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 72 flow [2022-11-25 17:11:51,759 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=72, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2022-11-25 17:11:51,760 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 4 predicate places. [2022-11-25 17:11:51,760 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 72 flow [2022-11-25 17:11:51,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 251.0) internal successors, (1757), 7 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:51,762 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:11:51,763 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:51,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:11:51,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:51,971 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:11:51,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:51,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1191422504, now seen corresponding path program 2 times [2022-11-25 17:11:51,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:51,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179893512] [2022-11-25 17:11:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:51,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:11:52,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:52,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179893512] [2022-11-25 17:11:52,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179893512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:52,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:52,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:11:52,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888632677] [2022-11-25 17:11:52,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:52,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:11:52,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:52,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:11:52,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:11:52,921 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 583 [2022-11-25 17:11:52,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 72 flow. Second operand has 6 states, 6 states have (on average 229.5) internal successors, (1377), 6 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:52,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:11:52,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 583 [2022-11-25 17:11:52,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:11:53,144 INFO L130 PetriNetUnfolder]: 71/141 cut-off events. [2022-11-25 17:11:53,145 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 17:11:53,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 141 events. 71/141 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 398 event pairs, 24 based on Foata normal form. 1/112 useless extension candidates. Maximal degree in co-relation 281. Up to 79 conditions per place. [2022-11-25 17:11:53,147 INFO L137 encePairwiseOnDemand]: 577/583 looper letters, 32 selfloop transitions, 3 changer transitions 8/43 dead transitions. [2022-11-25 17:11:53,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 43 transitions, 210 flow [2022-11-25 17:11:53,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:11:53,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:11:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1177 transitions. [2022-11-25 17:11:53,152 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4037735849056604 [2022-11-25 17:11:53,153 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1177 transitions. [2022-11-25 17:11:53,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1177 transitions. [2022-11-25 17:11:53,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:11:53,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1177 transitions. [2022-11-25 17:11:53,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 235.4) internal successors, (1177), 5 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:53,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:53,166 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:53,166 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 72 flow. Second operand 5 states and 1177 transitions. [2022-11-25 17:11:53,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 43 transitions, 210 flow [2022-11-25 17:11:53,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 200 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 17:11:53,170 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 86 flow [2022-11-25 17:11:53,170 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2022-11-25 17:11:53,172 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2022-11-25 17:11:53,173 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 86 flow [2022-11-25 17:11:53,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 229.5) internal successors, (1377), 6 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:53,175 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:11:53,175 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:53,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:11:53,176 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:11:53,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:53,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1767134072, now seen corresponding path program 3 times [2022-11-25 17:11:53,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:53,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543900041] [2022-11-25 17:11:53,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:53,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:11:53,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:53,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543900041] [2022-11-25 17:11:53,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543900041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:53,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:53,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:11:53,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116283239] [2022-11-25 17:11:53,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:53,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:11:53,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:53,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:11:53,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:11:54,168 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 583 [2022-11-25 17:11:54,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 229.5) internal successors, (1377), 6 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:54,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:11:54,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 583 [2022-11-25 17:11:54,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:11:54,451 INFO L130 PetriNetUnfolder]: 103/203 cut-off events. [2022-11-25 17:11:54,452 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2022-11-25 17:11:54,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561 conditions, 203 events. 103/203 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 641 event pairs, 42 based on Foata normal form. 3/194 useless extension candidates. Maximal degree in co-relation 535. Up to 131 conditions per place. [2022-11-25 17:11:54,459 INFO L137 encePairwiseOnDemand]: 577/583 looper letters, 38 selfloop transitions, 3 changer transitions 6/47 dead transitions. [2022-11-25 17:11:54,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 47 transitions, 271 flow [2022-11-25 17:11:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:11:54,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:11:54,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1175 transitions. [2022-11-25 17:11:54,464 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40308747855917665 [2022-11-25 17:11:54,464 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1175 transitions. [2022-11-25 17:11:54,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1175 transitions. [2022-11-25 17:11:54,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:11:54,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1175 transitions. [2022-11-25 17:11:54,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:54,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:54,478 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:54,478 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 86 flow. Second operand 5 states and 1175 transitions. [2022-11-25 17:11:54,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 47 transitions, 271 flow [2022-11-25 17:11:54,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 251 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-11-25 17:11:54,485 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 102 flow [2022-11-25 17:11:54,485 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2022-11-25 17:11:54,488 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2022-11-25 17:11:54,488 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 102 flow [2022-11-25 17:11:54,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 229.5) internal successors, (1377), 6 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:54,489 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:11:54,489 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:54,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:11:54,490 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:11:54,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:54,491 INFO L85 PathProgramCache]: Analyzing trace with hash 110940334, now seen corresponding path program 4 times [2022-11-25 17:11:54,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:54,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046574045] [2022-11-25 17:11:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:54,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:11:55,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:55,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046574045] [2022-11-25 17:11:55,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046574045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:55,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:55,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:11:55,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523653329] [2022-11-25 17:11:55,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:55,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:11:55,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:55,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:11:55,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:11:55,254 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 583 [2022-11-25 17:11:55,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 102 flow. Second operand has 6 states, 6 states have (on average 227.5) internal successors, (1365), 6 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:55,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:11:55,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 583 [2022-11-25 17:11:55,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:11:55,513 INFO L130 PetriNetUnfolder]: 134/267 cut-off events. [2022-11-25 17:11:55,513 INFO L131 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2022-11-25 17:11:55,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 267 events. 134/267 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1024 event pairs, 14 based on Foata normal form. 2/237 useless extension candidates. Maximal degree in co-relation 795. Up to 174 conditions per place. [2022-11-25 17:11:55,516 INFO L137 encePairwiseOnDemand]: 576/583 looper letters, 39 selfloop transitions, 8 changer transitions 4/51 dead transitions. [2022-11-25 17:11:55,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 51 transitions, 308 flow [2022-11-25 17:11:55,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:11:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:11:55,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1164 transitions. [2022-11-25 17:11:55,521 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39931389365351627 [2022-11-25 17:11:55,521 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1164 transitions. [2022-11-25 17:11:55,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1164 transitions. [2022-11-25 17:11:55,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:11:55,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1164 transitions. [2022-11-25 17:11:55,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 232.8) internal successors, (1164), 5 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:55,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:55,532 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:55,532 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 102 flow. Second operand 5 states and 1164 transitions. [2022-11-25 17:11:55,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 51 transitions, 308 flow [2022-11-25 17:11:55,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 51 transitions, 287 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-11-25 17:11:55,535 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 171 flow [2022-11-25 17:11:55,536 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2022-11-25 17:11:55,536 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2022-11-25 17:11:55,537 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 171 flow [2022-11-25 17:11:55,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 227.5) internal successors, (1365), 6 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:55,538 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:11:55,538 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:55,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:11:55,538 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:11:55,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:55,539 INFO L85 PathProgramCache]: Analyzing trace with hash 146738276, now seen corresponding path program 5 times [2022-11-25 17:11:55,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:55,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192250364] [2022-11-25 17:11:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:55,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:11:56,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:56,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192250364] [2022-11-25 17:11:56,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192250364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:56,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:56,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:11:56,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486566140] [2022-11-25 17:11:56,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:56,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:11:56,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:56,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:11:56,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:11:56,233 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 583 [2022-11-25 17:11:56,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 171 flow. Second operand has 6 states, 6 states have (on average 224.5) internal successors, (1347), 6 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:56,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:11:56,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 583 [2022-11-25 17:11:56,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:11:56,571 INFO L130 PetriNetUnfolder]: 135/280 cut-off events. [2022-11-25 17:11:56,572 INFO L131 PetriNetUnfolder]: For 428/428 co-relation queries the response was YES. [2022-11-25 17:11:56,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 280 events. 135/280 cut-off events. For 428/428 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1087 event pairs, 36 based on Foata normal form. 2/248 useless extension candidates. Maximal degree in co-relation 941. Up to 143 conditions per place. [2022-11-25 17:11:56,574 INFO L137 encePairwiseOnDemand]: 576/583 looper letters, 45 selfloop transitions, 11 changer transitions 4/60 dead transitions. [2022-11-25 17:11:56,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 60 transitions, 422 flow [2022-11-25 17:11:56,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:11:56,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:11:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1153 transitions. [2022-11-25 17:11:56,579 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3955403087478559 [2022-11-25 17:11:56,579 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1153 transitions. [2022-11-25 17:11:56,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1153 transitions. [2022-11-25 17:11:56,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:11:56,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1153 transitions. [2022-11-25 17:11:56,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 230.6) internal successors, (1153), 5 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:56,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:56,590 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:56,590 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 171 flow. Second operand 5 states and 1153 transitions. [2022-11-25 17:11:56,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 60 transitions, 422 flow [2022-11-25 17:11:56,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 420 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:11:56,594 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 250 flow [2022-11-25 17:11:56,595 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2022-11-25 17:11:56,595 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2022-11-25 17:11:56,596 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 250 flow [2022-11-25 17:11:56,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 224.5) internal successors, (1347), 6 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:56,597 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:11:56,597 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:56,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:11:56,598 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:11:56,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:56,598 INFO L85 PathProgramCache]: Analyzing trace with hash 420516874, now seen corresponding path program 6 times [2022-11-25 17:11:56,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:56,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388956798] [2022-11-25 17:11:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:56,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:11:57,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:57,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388956798] [2022-11-25 17:11:57,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388956798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:57,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:57,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:11:57,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611867320] [2022-11-25 17:11:57,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:57,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:11:57,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:57,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:11:57,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:11:57,295 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 583 [2022-11-25 17:11:57,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 250 flow. Second operand has 6 states, 6 states have (on average 227.5) internal successors, (1365), 6 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:57,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:11:57,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 583 [2022-11-25 17:11:57,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:11:57,575 INFO L130 PetriNetUnfolder]: 127/266 cut-off events. [2022-11-25 17:11:57,576 INFO L131 PetriNetUnfolder]: For 608/608 co-relation queries the response was YES. [2022-11-25 17:11:57,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1065 conditions, 266 events. 127/266 cut-off events. For 608/608 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1082 event pairs, 7 based on Foata normal form. 4/240 useless extension candidates. Maximal degree in co-relation 1033. Up to 187 conditions per place. [2022-11-25 17:11:57,578 INFO L137 encePairwiseOnDemand]: 577/583 looper letters, 40 selfloop transitions, 4 changer transitions 7/51 dead transitions. [2022-11-25 17:11:57,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 402 flow [2022-11-25 17:11:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:11:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:11:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1162 transitions. [2022-11-25 17:11:57,583 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3986277873070326 [2022-11-25 17:11:57,584 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1162 transitions. [2022-11-25 17:11:57,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1162 transitions. [2022-11-25 17:11:57,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:11:57,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1162 transitions. [2022-11-25 17:11:57,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 232.4) internal successors, (1162), 5 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:57,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:57,595 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:57,595 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 250 flow. Second operand 5 states and 1162 transitions. [2022-11-25 17:11:57,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 402 flow [2022-11-25 17:11:57,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 381 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-11-25 17:11:57,599 INFO L231 Difference]: Finished difference. Result has 48 places, 32 transitions, 197 flow [2022-11-25 17:11:57,600 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=197, PETRI_PLACES=48, PETRI_TRANSITIONS=32} [2022-11-25 17:11:57,600 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2022-11-25 17:11:57,601 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 32 transitions, 197 flow [2022-11-25 17:11:57,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 227.5) internal successors, (1365), 6 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:57,602 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:11:57,602 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:57,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:11:57,602 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:11:57,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:57,603 INFO L85 PathProgramCache]: Analyzing trace with hash -795218014, now seen corresponding path program 7 times [2022-11-25 17:11:57,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:57,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054404341] [2022-11-25 17:11:57,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:57,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:57,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:11:58,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:58,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054404341] [2022-11-25 17:11:58,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054404341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:58,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:58,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:11:58,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993905945] [2022-11-25 17:11:58,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:58,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:11:58,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:58,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:11:58,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:11:58,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 583 [2022-11-25 17:11:58,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 32 transitions, 197 flow. Second operand has 6 states, 6 states have (on average 227.5) internal successors, (1365), 6 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:58,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:11:58,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 583 [2022-11-25 17:11:58,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:11:58,530 INFO L130 PetriNetUnfolder]: 139/276 cut-off events. [2022-11-25 17:11:58,530 INFO L131 PetriNetUnfolder]: For 644/644 co-relation queries the response was YES. [2022-11-25 17:11:58,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1034 conditions, 276 events. 139/276 cut-off events. For 644/644 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1022 event pairs, 22 based on Foata normal form. 2/238 useless extension candidates. Maximal degree in co-relation 1001. Up to 154 conditions per place. [2022-11-25 17:11:58,533 INFO L137 encePairwiseOnDemand]: 576/583 looper letters, 45 selfloop transitions, 10 changer transitions 4/59 dead transitions. [2022-11-25 17:11:58,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 448 flow [2022-11-25 17:11:58,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:11:58,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:11:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1164 transitions. [2022-11-25 17:11:58,538 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39931389365351627 [2022-11-25 17:11:58,538 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1164 transitions. [2022-11-25 17:11:58,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1164 transitions. [2022-11-25 17:11:58,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:11:58,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1164 transitions. [2022-11-25 17:11:58,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 232.8) internal successors, (1164), 5 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:58,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:58,548 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:58,548 INFO L175 Difference]: Start difference. First operand has 48 places, 32 transitions, 197 flow. Second operand 5 states and 1164 transitions. [2022-11-25 17:11:58,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 448 flow [2022-11-25 17:11:58,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 59 transitions, 407 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-25 17:11:58,553 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 252 flow [2022-11-25 17:11:58,553 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=252, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2022-11-25 17:11:58,556 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2022-11-25 17:11:58,557 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 252 flow [2022-11-25 17:11:58,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 227.5) internal successors, (1365), 6 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:58,558 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:11:58,558 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:58,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:11:58,559 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:11:58,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:58,559 INFO L85 PathProgramCache]: Analyzing trace with hash 771044111, now seen corresponding path program 1 times [2022-11-25 17:11:58,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:58,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707542054] [2022-11-25 17:11:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:58,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:11:58,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:58,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707542054] [2022-11-25 17:11:58,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707542054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:58,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:58,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:11:58,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085258183] [2022-11-25 17:11:58,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:58,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:11:58,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:58,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:11:58,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:11:58,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 583 [2022-11-25 17:11:58,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 236.2) internal successors, (1181), 5 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:58,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:11:58,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 583 [2022-11-25 17:11:58,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:11:59,259 INFO L130 PetriNetUnfolder]: 131/258 cut-off events. [2022-11-25 17:11:59,259 INFO L131 PetriNetUnfolder]: For 674/674 co-relation queries the response was YES. [2022-11-25 17:11:59,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1022 conditions, 258 events. 131/258 cut-off events. For 674/674 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 914 event pairs, 39 based on Foata normal form. 4/222 useless extension candidates. Maximal degree in co-relation 989. Up to 145 conditions per place. [2022-11-25 17:11:59,263 INFO L137 encePairwiseOnDemand]: 578/583 looper letters, 52 selfloop transitions, 10 changer transitions 1/63 dead transitions. [2022-11-25 17:11:59,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 63 transitions, 506 flow [2022-11-25 17:11:59,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:11:59,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:11:59,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1209 transitions. [2022-11-25 17:11:59,267 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4147512864493997 [2022-11-25 17:11:59,267 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1209 transitions. [2022-11-25 17:11:59,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1209 transitions. [2022-11-25 17:11:59,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:11:59,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1209 transitions. [2022-11-25 17:11:59,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 241.8) internal successors, (1209), 5 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:59,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:59,279 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:59,279 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 252 flow. Second operand 5 states and 1209 transitions. [2022-11-25 17:11:59,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 63 transitions, 506 flow [2022-11-25 17:11:59,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 63 transitions, 501 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:11:59,283 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 320 flow [2022-11-25 17:11:59,283 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2022-11-25 17:11:59,284 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 32 predicate places. [2022-11-25 17:11:59,284 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 320 flow [2022-11-25 17:11:59,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 236.2) internal successors, (1181), 5 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:59,285 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:11:59,285 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:59,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:11:59,285 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:11:59,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:59,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2128172451, now seen corresponding path program 2 times [2022-11-25 17:11:59,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:59,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230743874] [2022-11-25 17:11:59,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:59,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:11:59,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:59,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230743874] [2022-11-25 17:11:59,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230743874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:59,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:59,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:11:59,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226794792] [2022-11-25 17:11:59,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:59,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:11:59,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:59,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:11:59,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:11:59,647 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 583 [2022-11-25 17:11:59,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 236.2) internal successors, (1181), 5 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:59,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:11:59,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 583 [2022-11-25 17:11:59,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:11:59,850 INFO L130 PetriNetUnfolder]: 121/238 cut-off events. [2022-11-25 17:11:59,850 INFO L131 PetriNetUnfolder]: For 730/730 co-relation queries the response was YES. [2022-11-25 17:11:59,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 238 events. 121/238 cut-off events. For 730/730 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 816 event pairs, 39 based on Foata normal form. 4/206 useless extension candidates. Maximal degree in co-relation 987. Up to 145 conditions per place. [2022-11-25 17:11:59,853 INFO L137 encePairwiseOnDemand]: 578/583 looper letters, 42 selfloop transitions, 10 changer transitions 5/57 dead transitions. [2022-11-25 17:11:59,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 57 transitions, 503 flow [2022-11-25 17:11:59,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:11:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:11:59,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1202 transitions. [2022-11-25 17:11:59,858 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4123499142367067 [2022-11-25 17:11:59,858 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1202 transitions. [2022-11-25 17:11:59,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1202 transitions. [2022-11-25 17:11:59,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:11:59,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1202 transitions. [2022-11-25 17:11:59,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 240.4) internal successors, (1202), 5 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:59,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:59,878 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:59,878 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 320 flow. Second operand 5 states and 1202 transitions. [2022-11-25 17:11:59,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 57 transitions, 503 flow [2022-11-25 17:11:59,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 57 transitions, 491 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 17:11:59,885 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 316 flow [2022-11-25 17:11:59,886 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2022-11-25 17:11:59,887 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2022-11-25 17:11:59,887 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 316 flow [2022-11-25 17:11:59,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 236.2) internal successors, (1181), 5 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:59,888 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:11:59,888 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:59,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:11:59,890 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:11:59,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:59,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1079108456, now seen corresponding path program 1 times [2022-11-25 17:11:59,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:59,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046068549] [2022-11-25 17:11:59,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:59,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:00,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:00,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046068549] [2022-11-25 17:12:00,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046068549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:12:00,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:12:00,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:12:00,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987521659] [2022-11-25 17:12:00,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:12:00,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:12:00,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:00,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:12:00,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:12:00,257 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 583 [2022-11-25 17:12:00,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 236.2) internal successors, (1181), 5 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:00,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:12:00,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 583 [2022-11-25 17:12:00,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:12:00,463 INFO L130 PetriNetUnfolder]: 115/222 cut-off events. [2022-11-25 17:12:00,463 INFO L131 PetriNetUnfolder]: For 734/734 co-relation queries the response was YES. [2022-11-25 17:12:00,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954 conditions, 222 events. 115/222 cut-off events. For 734/734 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 694 event pairs, 37 based on Foata normal form. 2/188 useless extension candidates. Maximal degree in co-relation 918. Up to 155 conditions per place. [2022-11-25 17:12:00,467 INFO L137 encePairwiseOnDemand]: 578/583 looper letters, 41 selfloop transitions, 11 changer transitions 2/54 dead transitions. [2022-11-25 17:12:00,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 54 transitions, 487 flow [2022-11-25 17:12:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:12:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:12:00,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1201 transitions. [2022-11-25 17:12:00,472 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41200686106346485 [2022-11-25 17:12:00,472 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1201 transitions. [2022-11-25 17:12:00,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1201 transitions. [2022-11-25 17:12:00,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:12:00,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1201 transitions. [2022-11-25 17:12:00,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 240.2) internal successors, (1201), 5 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:00,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:00,481 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:00,481 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 316 flow. Second operand 5 states and 1201 transitions. [2022-11-25 17:12:00,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 54 transitions, 487 flow [2022-11-25 17:12:00,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 455 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-25 17:12:00,485 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 318 flow [2022-11-25 17:12:00,485 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=318, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2022-11-25 17:12:00,486 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2022-11-25 17:12:00,486 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 318 flow [2022-11-25 17:12:00,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 236.2) internal successors, (1181), 5 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:00,487 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:12:00,487 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:00,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:12:00,487 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:12:00,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:00,488 INFO L85 PathProgramCache]: Analyzing trace with hash -366550617, now seen corresponding path program 3 times [2022-11-25 17:12:00,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:00,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111547097] [2022-11-25 17:12:00,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:00,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:00,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:00,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111547097] [2022-11-25 17:12:00,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111547097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:12:00,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:12:00,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:12:00,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583714273] [2022-11-25 17:12:00,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:12:00,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:12:00,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:00,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:12:00,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:12:00,793 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 583 [2022-11-25 17:12:00,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 318 flow. Second operand has 5 states, 5 states have (on average 240.2) internal successors, (1201), 5 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:00,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:12:00,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 583 [2022-11-25 17:12:00,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:12:00,966 INFO L130 PetriNetUnfolder]: 120/229 cut-off events. [2022-11-25 17:12:00,966 INFO L131 PetriNetUnfolder]: For 700/700 co-relation queries the response was YES. [2022-11-25 17:12:00,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 994 conditions, 229 events. 120/229 cut-off events. For 700/700 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 736 event pairs, 11 based on Foata normal form. 4/195 useless extension candidates. Maximal degree in co-relation 958. Up to 117 conditions per place. [2022-11-25 17:12:00,968 INFO L137 encePairwiseOnDemand]: 578/583 looper letters, 47 selfloop transitions, 11 changer transitions 0/58 dead transitions. [2022-11-25 17:12:00,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 519 flow [2022-11-25 17:12:00,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:12:00,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:12:00,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1223 transitions. [2022-11-25 17:12:00,973 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4195540308747856 [2022-11-25 17:12:00,973 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1223 transitions. [2022-11-25 17:12:00,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1223 transitions. [2022-11-25 17:12:00,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:12:00,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1223 transitions. [2022-11-25 17:12:00,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 244.6) internal successors, (1223), 5 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:00,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:00,982 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:00,982 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 318 flow. Second operand 5 states and 1223 transitions. [2022-11-25 17:12:00,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 519 flow [2022-11-25 17:12:00,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 58 transitions, 492 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-11-25 17:12:00,991 INFO L231 Difference]: Finished difference. Result has 58 places, 42 transitions, 334 flow [2022-11-25 17:12:00,992 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=334, PETRI_PLACES=58, PETRI_TRANSITIONS=42} [2022-11-25 17:12:00,993 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 37 predicate places. [2022-11-25 17:12:00,993 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 42 transitions, 334 flow [2022-11-25 17:12:00,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 240.2) internal successors, (1201), 5 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:00,994 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:12:00,994 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:00,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:12:00,994 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:12:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:00,995 INFO L85 PathProgramCache]: Analyzing trace with hash 105935043, now seen corresponding path program 4 times [2022-11-25 17:12:00,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:00,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95305880] [2022-11-25 17:12:00,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:00,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:01,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:01,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95305880] [2022-11-25 17:12:01,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95305880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:12:01,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:12:01,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:12:01,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741833257] [2022-11-25 17:12:01,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:12:01,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:12:01,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:01,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:12:01,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:12:01,370 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 583 [2022-11-25 17:12:01,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 42 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 236.2) internal successors, (1181), 5 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:01,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:12:01,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 583 [2022-11-25 17:12:01,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:12:01,569 INFO L130 PetriNetUnfolder]: 116/225 cut-off events. [2022-11-25 17:12:01,570 INFO L131 PetriNetUnfolder]: For 785/785 co-relation queries the response was YES. [2022-11-25 17:12:01,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978 conditions, 225 events. 116/225 cut-off events. For 785/785 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 703 event pairs, 41 based on Foata normal form. 4/191 useless extension candidates. Maximal degree in co-relation 942. Up to 161 conditions per place. [2022-11-25 17:12:01,572 INFO L137 encePairwiseOnDemand]: 578/583 looper letters, 39 selfloop transitions, 10 changer transitions 4/53 dead transitions. [2022-11-25 17:12:01,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 53 transitions, 477 flow [2022-11-25 17:12:01,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:12:01,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:12:01,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1200 transitions. [2022-11-25 17:12:01,577 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.411663807890223 [2022-11-25 17:12:01,577 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1200 transitions. [2022-11-25 17:12:01,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1200 transitions. [2022-11-25 17:12:01,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:12:01,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1200 transitions. [2022-11-25 17:12:01,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:01,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:01,586 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:01,586 INFO L175 Difference]: Start difference. First operand has 58 places, 42 transitions, 334 flow. Second operand 5 states and 1200 transitions. [2022-11-25 17:12:01,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 53 transitions, 477 flow [2022-11-25 17:12:01,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 53 transitions, 455 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 17:12:01,590 INFO L231 Difference]: Finished difference. Result has 60 places, 41 transitions, 326 flow [2022-11-25 17:12:01,591 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=326, PETRI_PLACES=60, PETRI_TRANSITIONS=41} [2022-11-25 17:12:01,591 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 39 predicate places. [2022-11-25 17:12:01,591 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 41 transitions, 326 flow [2022-11-25 17:12:01,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 236.2) internal successors, (1181), 5 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:01,592 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:12:01,592 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:01,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 17:12:01,593 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:12:01,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:01,593 INFO L85 PathProgramCache]: Analyzing trace with hash -797874673, now seen corresponding path program 5 times [2022-11-25 17:12:01,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:01,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760830305] [2022-11-25 17:12:01,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:01,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:01,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:01,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760830305] [2022-11-25 17:12:01,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760830305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:12:01,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:12:01,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:12:01,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704752128] [2022-11-25 17:12:01,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:12:01,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:12:01,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:01,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:12:01,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:12:01,980 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 583 [2022-11-25 17:12:01,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 41 transitions, 326 flow. Second operand has 5 states, 5 states have (on average 237.2) internal successors, (1186), 5 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:01,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:12:01,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 583 [2022-11-25 17:12:01,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:12:02,185 INFO L130 PetriNetUnfolder]: 106/210 cut-off events. [2022-11-25 17:12:02,186 INFO L131 PetriNetUnfolder]: For 678/678 co-relation queries the response was YES. [2022-11-25 17:12:02,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 922 conditions, 210 events. 106/210 cut-off events. For 678/678 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 650 event pairs, 9 based on Foata normal form. 4/180 useless extension candidates. Maximal degree in co-relation 886. Up to 108 conditions per place. [2022-11-25 17:12:02,188 INFO L137 encePairwiseOnDemand]: 577/583 looper letters, 42 selfloop transitions, 16 changer transitions 0/58 dead transitions. [2022-11-25 17:12:02,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 58 transitions, 515 flow [2022-11-25 17:12:02,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:12:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:12:02,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1208 transitions. [2022-11-25 17:12:02,193 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4144082332761578 [2022-11-25 17:12:02,194 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1208 transitions. [2022-11-25 17:12:02,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1208 transitions. [2022-11-25 17:12:02,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:12:02,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1208 transitions. [2022-11-25 17:12:02,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 241.6) internal successors, (1208), 5 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:02,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:02,204 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:02,204 INFO L175 Difference]: Start difference. First operand has 60 places, 41 transitions, 326 flow. Second operand 5 states and 1208 transitions. [2022-11-25 17:12:02,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 58 transitions, 515 flow [2022-11-25 17:12:02,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 58 transitions, 470 flow, removed 5 selfloop flow, removed 5 redundant places. [2022-11-25 17:12:02,212 INFO L231 Difference]: Finished difference. Result has 58 places, 44 transitions, 368 flow [2022-11-25 17:12:02,213 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=368, PETRI_PLACES=58, PETRI_TRANSITIONS=44} [2022-11-25 17:12:02,213 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 37 predicate places. [2022-11-25 17:12:02,214 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 44 transitions, 368 flow [2022-11-25 17:12:02,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 237.2) internal successors, (1186), 5 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:02,215 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:12:02,215 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:02,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 17:12:02,215 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:12:02,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:02,216 INFO L85 PathProgramCache]: Analyzing trace with hash -637451312, now seen corresponding path program 2 times [2022-11-25 17:12:02,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:02,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205081452] [2022-11-25 17:12:02,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:02,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:02,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:02,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205081452] [2022-11-25 17:12:02,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205081452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:12:02,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:12:02,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:12:02,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919320604] [2022-11-25 17:12:02,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:12:02,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:12:02,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:02,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:12:02,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:12:02,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 583 [2022-11-25 17:12:02,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 44 transitions, 368 flow. Second operand has 5 states, 5 states have (on average 236.2) internal successors, (1181), 5 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:02,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:12:02,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 583 [2022-11-25 17:12:02,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:12:02,767 INFO L130 PetriNetUnfolder]: 97/180 cut-off events. [2022-11-25 17:12:02,768 INFO L131 PetriNetUnfolder]: For 868/868 co-relation queries the response was YES. [2022-11-25 17:12:02,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 180 events. 97/180 cut-off events. For 868/868 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 484 event pairs, 33 based on Foata normal form. 6/186 useless extension candidates. Maximal degree in co-relation 830. Up to 146 conditions per place. [2022-11-25 17:12:02,770 INFO L137 encePairwiseOnDemand]: 578/583 looper letters, 42 selfloop transitions, 10 changer transitions 0/52 dead transitions. [2022-11-25 17:12:02,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 488 flow [2022-11-25 17:12:02,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:12:02,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:12:02,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1199 transitions. [2022-11-25 17:12:02,774 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41132075471698115 [2022-11-25 17:12:02,775 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1199 transitions. [2022-11-25 17:12:02,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1199 transitions. [2022-11-25 17:12:02,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:12:02,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1199 transitions. [2022-11-25 17:12:02,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 239.8) internal successors, (1199), 5 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:02,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:02,785 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 583.0) internal successors, (3498), 6 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:02,785 INFO L175 Difference]: Start difference. First operand has 58 places, 44 transitions, 368 flow. Second operand 5 states and 1199 transitions. [2022-11-25 17:12:02,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 488 flow [2022-11-25 17:12:02,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 52 transitions, 441 flow, removed 13 selfloop flow, removed 6 redundant places. [2022-11-25 17:12:02,790 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 321 flow [2022-11-25 17:12:02,791 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=321, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2022-11-25 17:12:02,793 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2022-11-25 17:12:02,794 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 321 flow [2022-11-25 17:12:02,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 236.2) internal successors, (1181), 5 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:02,794 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:12:02,795 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:02,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 17:12:02,795 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:12:02,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:02,796 INFO L85 PathProgramCache]: Analyzing trace with hash 864639027, now seen corresponding path program 1 times [2022-11-25 17:12:02,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:02,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163769858] [2022-11-25 17:12:02,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:02,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:04,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:04,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163769858] [2022-11-25 17:12:04,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163769858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:04,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270802653] [2022-11-25 17:12:04,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:04,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:04,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:04,335 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:04,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:12:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:04,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 17:12:04,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:05,136 INFO L350 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 164 treesize of output 104 [2022-11-25 17:12:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:05,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:07,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:12:07,294 INFO L350 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 231 treesize of output 157 [2022-11-25 17:12:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:07,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270802653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:07,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:07,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2022-11-25 17:12:07,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055196505] [2022-11-25 17:12:07,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:07,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 17:12:07,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:07,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 17:12:07,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:12:09,603 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 583 [2022-11-25 17:12:09,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 321 flow. Second operand has 22 states, 22 states have (on average 209.13636363636363) internal successors, (4601), 22 states have internal predecessors, (4601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:09,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:12:09,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 583 [2022-11-25 17:12:09,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:12:12,211 INFO L130 PetriNetUnfolder]: 229/439 cut-off events. [2022-11-25 17:12:12,211 INFO L131 PetriNetUnfolder]: For 1378/1378 co-relation queries the response was YES. [2022-11-25 17:12:12,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1811 conditions, 439 events. 229/439 cut-off events. For 1378/1378 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1836 event pairs, 9 based on Foata normal form. 7/446 useless extension candidates. Maximal degree in co-relation 1777. Up to 133 conditions per place. [2022-11-25 17:12:12,216 INFO L137 encePairwiseOnDemand]: 574/583 looper letters, 86 selfloop transitions, 43 changer transitions 23/152 dead transitions. [2022-11-25 17:12:12,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 152 transitions, 1214 flow [2022-11-25 17:12:12,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:12:12,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 17:12:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4678 transitions. [2022-11-25 17:12:12,231 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.364727896460315 [2022-11-25 17:12:12,231 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4678 transitions. [2022-11-25 17:12:12,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4678 transitions. [2022-11-25 17:12:12,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:12:12,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4678 transitions. [2022-11-25 17:12:12,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 212.63636363636363) internal successors, (4678), 22 states have internal predecessors, (4678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:12,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 583.0) internal successors, (13409), 23 states have internal predecessors, (13409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:12,273 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 583.0) internal successors, (13409), 23 states have internal predecessors, (13409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:12,273 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 321 flow. Second operand 22 states and 4678 transitions. [2022-11-25 17:12:12,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 152 transitions, 1214 flow [2022-11-25 17:12:12,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 152 transitions, 1133 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-25 17:12:12,280 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 676 flow [2022-11-25 17:12:12,281 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=676, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2022-11-25 17:12:12,281 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 60 predicate places. [2022-11-25 17:12:12,281 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 676 flow [2022-11-25 17:12:12,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 209.13636363636363) internal successors, (4601), 22 states have internal predecessors, (4601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:12,283 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:12:12,283 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:12,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:12,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 17:12:12,491 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:12:12,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:12,491 INFO L85 PathProgramCache]: Analyzing trace with hash -450137789, now seen corresponding path program 2 times [2022-11-25 17:12:12,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:12,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070095576] [2022-11-25 17:12:12,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:12,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:13,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:13,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070095576] [2022-11-25 17:12:13,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070095576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:13,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289528537] [2022-11-25 17:12:13,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:12:13,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:13,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:13,694 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:13,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:12:13,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:12:13,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:13,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 17:12:13,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:14,401 INFO L350 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 173 treesize of output 113 [2022-11-25 17:12:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:14,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:16,558 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:12:16,559 INFO L350 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 365 treesize of output 249 [2022-11-25 17:12:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:17,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289528537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:17,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:17,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2022-11-25 17:12:17,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838713259] [2022-11-25 17:12:17,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:17,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 17:12:17,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:17,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 17:12:17,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:12:19,573 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 583 [2022-11-25 17:12:19,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 676 flow. Second operand has 22 states, 22 states have (on average 209.0) internal successors, (4598), 22 states have internal predecessors, (4598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:19,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:12:19,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 583 [2022-11-25 17:12:19,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:12:23,237 INFO L130 PetriNetUnfolder]: 316/632 cut-off events. [2022-11-25 17:12:23,238 INFO L131 PetriNetUnfolder]: For 4348/4348 co-relation queries the response was YES. [2022-11-25 17:12:23,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3357 conditions, 632 events. 316/632 cut-off events. For 4348/4348 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3086 event pairs, 30 based on Foata normal form. 9/641 useless extension candidates. Maximal degree in co-relation 3311. Up to 211 conditions per place. [2022-11-25 17:12:23,244 INFO L137 encePairwiseOnDemand]: 575/583 looper letters, 94 selfloop transitions, 57 changer transitions 14/165 dead transitions. [2022-11-25 17:12:23,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 165 transitions, 1710 flow [2022-11-25 17:12:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:12:23,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 17:12:23,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4459 transitions. [2022-11-25 17:12:23,260 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3642081189251001 [2022-11-25 17:12:23,260 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4459 transitions. [2022-11-25 17:12:23,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4459 transitions. [2022-11-25 17:12:23,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:12:23,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4459 transitions. [2022-11-25 17:12:23,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 212.33333333333334) internal successors, (4459), 21 states have internal predecessors, (4459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:23,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 583.0) internal successors, (12826), 22 states have internal predecessors, (12826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:23,295 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 583.0) internal successors, (12826), 22 states have internal predecessors, (12826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:23,295 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 676 flow. Second operand 21 states and 4459 transitions. [2022-11-25 17:12:23,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 165 transitions, 1710 flow [2022-11-25 17:12:23,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 165 transitions, 1465 flow, removed 110 selfloop flow, removed 7 redundant places. [2022-11-25 17:12:23,316 INFO L231 Difference]: Finished difference. Result has 99 places, 110 transitions, 1102 flow [2022-11-25 17:12:23,316 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1102, PETRI_PLACES=99, PETRI_TRANSITIONS=110} [2022-11-25 17:12:23,317 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 78 predicate places. [2022-11-25 17:12:23,317 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 110 transitions, 1102 flow [2022-11-25 17:12:23,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 209.0) internal successors, (4598), 22 states have internal predecessors, (4598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:23,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:12:23,319 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:23,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:23,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:23,526 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:12:23,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:23,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1056897373, now seen corresponding path program 3 times [2022-11-25 17:12:23,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:23,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107176614] [2022-11-25 17:12:23,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:23,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:24,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:24,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107176614] [2022-11-25 17:12:24,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107176614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:24,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20976884] [2022-11-25 17:12:24,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:12:24,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:24,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:24,707 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:24,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:12:24,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:12:24,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:24,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:12:24,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:25,138 INFO L350 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 137 treesize of output 89 [2022-11-25 17:12:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:25,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:27,322 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:12:27,323 INFO L350 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 320 treesize of output 228 [2022-11-25 17:12:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:28,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20976884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:28,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:28,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-11-25 17:12:28,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546147584] [2022-11-25 17:12:28,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:28,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:12:28,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:28,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:12:28,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:12:30,005 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 583 [2022-11-25 17:12:30,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 110 transitions, 1102 flow. Second operand has 20 states, 20 states have (on average 209.0) internal successors, (4180), 20 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:30,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:12:30,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 583 [2022-11-25 17:12:30,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:12:31,393 INFO L130 PetriNetUnfolder]: 327/645 cut-off events. [2022-11-25 17:12:31,393 INFO L131 PetriNetUnfolder]: For 7191/7191 co-relation queries the response was YES. [2022-11-25 17:12:31,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3812 conditions, 645 events. 327/645 cut-off events. For 7191/7191 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3120 event pairs, 40 based on Foata normal form. 1/642 useless extension candidates. Maximal degree in co-relation 3762. Up to 215 conditions per place. [2022-11-25 17:12:31,401 INFO L137 encePairwiseOnDemand]: 576/583 looper letters, 101 selfloop transitions, 47 changer transitions 2/150 dead transitions. [2022-11-25 17:12:31,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 150 transitions, 1755 flow [2022-11-25 17:12:31,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:12:31,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:12:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2973 transitions. [2022-11-25 17:12:31,409 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36424895858858125 [2022-11-25 17:12:31,409 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2973 transitions. [2022-11-25 17:12:31,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2973 transitions. [2022-11-25 17:12:31,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:12:31,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2973 transitions. [2022-11-25 17:12:31,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 212.35714285714286) internal successors, (2973), 14 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:31,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 583.0) internal successors, (8745), 15 states have internal predecessors, (8745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:31,433 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 583.0) internal successors, (8745), 15 states have internal predecessors, (8745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:31,434 INFO L175 Difference]: Start difference. First operand has 99 places, 110 transitions, 1102 flow. Second operand 14 states and 2973 transitions. [2022-11-25 17:12:31,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 150 transitions, 1755 flow [2022-11-25 17:12:31,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 150 transitions, 1537 flow, removed 98 selfloop flow, removed 7 redundant places. [2022-11-25 17:12:31,477 INFO L231 Difference]: Finished difference. Result has 106 places, 118 transitions, 1098 flow [2022-11-25 17:12:31,478 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1098, PETRI_PLACES=106, PETRI_TRANSITIONS=118} [2022-11-25 17:12:31,478 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 85 predicate places. [2022-11-25 17:12:31,478 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 118 transitions, 1098 flow [2022-11-25 17:12:31,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 209.0) internal successors, (4180), 20 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:31,480 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:12:31,480 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:31,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:31,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:12:31,687 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:12:31,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:31,687 INFO L85 PathProgramCache]: Analyzing trace with hash 169131483, now seen corresponding path program 4 times [2022-11-25 17:12:31,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:31,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652564358] [2022-11-25 17:12:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:31,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:32,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:32,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652564358] [2022-11-25 17:12:32,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652564358] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:32,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523857165] [2022-11-25 17:12:32,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:12:32,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:32,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:32,853 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:32,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:12:33,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:12:33,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:33,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:12:33,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:33,542 INFO L350 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 170 treesize of output 110 [2022-11-25 17:12:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:33,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:35,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:12:35,178 INFO L350 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 257 treesize of output 173 [2022-11-25 17:12:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:35,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523857165] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:35,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:35,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2022-11-25 17:12:35,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714749929] [2022-11-25 17:12:35,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:35,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:12:35,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:35,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:12:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:12:37,675 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 583 [2022-11-25 17:12:37,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 118 transitions, 1098 flow. Second operand has 21 states, 21 states have (on average 210.04761904761904) internal successors, (4411), 21 states have internal predecessors, (4411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:37,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:12:37,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 583 [2022-11-25 17:12:37,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:12:39,337 INFO L130 PetriNetUnfolder]: 334/693 cut-off events. [2022-11-25 17:12:39,337 INFO L131 PetriNetUnfolder]: For 6788/6788 co-relation queries the response was YES. [2022-11-25 17:12:39,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3874 conditions, 693 events. 334/693 cut-off events. For 6788/6788 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3610 event pairs, 72 based on Foata normal form. 5/694 useless extension candidates. Maximal degree in co-relation 3823. Up to 402 conditions per place. [2022-11-25 17:12:39,344 INFO L137 encePairwiseOnDemand]: 575/583 looper letters, 99 selfloop transitions, 54 changer transitions 10/163 dead transitions. [2022-11-25 17:12:39,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 163 transitions, 1732 flow [2022-11-25 17:12:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:12:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:12:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2772 transitions. [2022-11-25 17:12:39,350 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36574746008708275 [2022-11-25 17:12:39,350 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2772 transitions. [2022-11-25 17:12:39,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2772 transitions. [2022-11-25 17:12:39,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:12:39,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2772 transitions. [2022-11-25 17:12:39,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 213.23076923076923) internal successors, (2772), 13 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:39,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 583.0) internal successors, (8162), 14 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:39,365 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 583.0) internal successors, (8162), 14 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:39,366 INFO L175 Difference]: Start difference. First operand has 106 places, 118 transitions, 1098 flow. Second operand 13 states and 2772 transitions. [2022-11-25 17:12:39,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 163 transitions, 1732 flow [2022-11-25 17:12:39,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 163 transitions, 1703 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-25 17:12:39,394 INFO L231 Difference]: Finished difference. Result has 115 places, 128 transitions, 1334 flow [2022-11-25 17:12:39,395 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=1049, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1334, PETRI_PLACES=115, PETRI_TRANSITIONS=128} [2022-11-25 17:12:39,395 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 94 predicate places. [2022-11-25 17:12:39,395 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 128 transitions, 1334 flow [2022-11-25 17:12:39,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 210.04761904761904) internal successors, (4411), 21 states have internal predecessors, (4411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:39,396 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:12:39,397 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:39,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:39,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:39,608 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:12:39,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:39,608 INFO L85 PathProgramCache]: Analyzing trace with hash -221858751, now seen corresponding path program 5 times [2022-11-25 17:12:39,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:39,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125303841] [2022-11-25 17:12:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:39,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:40,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:40,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125303841] [2022-11-25 17:12:40,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125303841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:40,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285656651] [2022-11-25 17:12:40,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:12:40,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:40,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:40,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:40,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:12:40,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:12:40,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:40,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 17:12:40,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:41,027 INFO L350 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 149 treesize of output 97 [2022-11-25 17:12:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:41,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:42,661 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:12:42,662 INFO L350 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 199 treesize of output 147 [2022-11-25 17:12:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:43,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285656651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:43,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:43,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2022-11-25 17:12:43,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677293852] [2022-11-25 17:12:43,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:43,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:12:43,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:43,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:12:43,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:12:45,579 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 583 [2022-11-25 17:12:45,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 128 transitions, 1334 flow. Second operand has 21 states, 21 states have (on average 210.04761904761904) internal successors, (4411), 21 states have internal predecessors, (4411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:45,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:12:45,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 583 [2022-11-25 17:12:45,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:12:48,026 INFO L130 PetriNetUnfolder]: 376/781 cut-off events. [2022-11-25 17:12:48,026 INFO L131 PetriNetUnfolder]: For 8574/8574 co-relation queries the response was YES. [2022-11-25 17:12:48,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4645 conditions, 781 events. 376/781 cut-off events. For 8574/8574 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4206 event pairs, 63 based on Foata normal form. 2/779 useless extension candidates. Maximal degree in co-relation 4591. Up to 361 conditions per place. [2022-11-25 17:12:48,036 INFO L137 encePairwiseOnDemand]: 574/583 looper letters, 133 selfloop transitions, 68 changer transitions 3/204 dead transitions. [2022-11-25 17:12:48,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 204 transitions, 2311 flow [2022-11-25 17:12:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:12:48,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 17:12:48,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 4048 transitions. [2022-11-25 17:12:48,059 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.365441906653426 [2022-11-25 17:12:48,059 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 4048 transitions. [2022-11-25 17:12:48,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 4048 transitions. [2022-11-25 17:12:48,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:12:48,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 4048 transitions. [2022-11-25 17:12:48,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 213.05263157894737) internal successors, (4048), 19 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:48,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 583.0) internal successors, (11660), 20 states have internal predecessors, (11660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:48,081 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 583.0) internal successors, (11660), 20 states have internal predecessors, (11660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:48,082 INFO L175 Difference]: Start difference. First operand has 115 places, 128 transitions, 1334 flow. Second operand 19 states and 4048 transitions. [2022-11-25 17:12:48,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 204 transitions, 2311 flow [2022-11-25 17:12:48,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 204 transitions, 2211 flow, removed 35 selfloop flow, removed 5 redundant places. [2022-11-25 17:12:48,128 INFO L231 Difference]: Finished difference. Result has 129 places, 154 transitions, 1746 flow [2022-11-25 17:12:48,129 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1746, PETRI_PLACES=129, PETRI_TRANSITIONS=154} [2022-11-25 17:12:48,131 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 108 predicate places. [2022-11-25 17:12:48,131 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 154 transitions, 1746 flow [2022-11-25 17:12:48,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 210.04761904761904) internal successors, (4411), 21 states have internal predecessors, (4411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:48,133 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:12:48,133 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:12:48,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:12:48,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:48,340 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:12:48,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:12:48,340 INFO L85 PathProgramCache]: Analyzing trace with hash 573861637, now seen corresponding path program 6 times [2022-11-25 17:12:48,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:12:48,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605051394] [2022-11-25 17:12:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:12:48,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:12:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:12:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:12:50,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:12:50,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605051394] [2022-11-25 17:12:50,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605051394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:12:50,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627823186] [2022-11-25 17:12:50,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:12:50,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:12:50,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:12:50,189 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:12:50,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:12:50,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:12:50,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:12:50,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 17:12:50,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:12:50,824 INFO L350 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 203 treesize of output 131 [2022-11-25 17:12:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:51,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:12:53,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:12:53,532 INFO L350 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 278 treesize of output 200 [2022-11-25 17:12:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:12:53,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627823186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:12:53,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:12:53,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 25 [2022-11-25 17:12:53,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63781679] [2022-11-25 17:12:53,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:12:53,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:12:53,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:12:53,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:12:53,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-11-25 17:12:57,325 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 583 [2022-11-25 17:12:57,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 154 transitions, 1746 flow. Second operand has 26 states, 26 states have (on average 201.80769230769232) internal successors, (5247), 26 states have internal predecessors, (5247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:12:57,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:12:57,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 583 [2022-11-25 17:12:57,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:13:02,130 INFO L130 PetriNetUnfolder]: 509/1109 cut-off events. [2022-11-25 17:13:02,130 INFO L131 PetriNetUnfolder]: For 17477/17477 co-relation queries the response was YES. [2022-11-25 17:13:02,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7118 conditions, 1109 events. 509/1109 cut-off events. For 17477/17477 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6909 event pairs, 38 based on Foata normal form. 11/1116 useless extension candidates. Maximal degree in co-relation 7060. Up to 323 conditions per place. [2022-11-25 17:13:02,139 INFO L137 encePairwiseOnDemand]: 574/583 looper letters, 175 selfloop transitions, 84 changer transitions 20/279 dead transitions. [2022-11-25 17:13:02,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 279 transitions, 3379 flow [2022-11-25 17:13:02,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:13:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 17:13:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4322 transitions. [2022-11-25 17:13:02,154 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35301805113125867 [2022-11-25 17:13:02,154 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4322 transitions. [2022-11-25 17:13:02,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4322 transitions. [2022-11-25 17:13:02,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:13:02,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4322 transitions. [2022-11-25 17:13:02,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 205.8095238095238) internal successors, (4322), 21 states have internal predecessors, (4322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:02,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 583.0) internal successors, (12826), 22 states have internal predecessors, (12826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:02,184 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 583.0) internal successors, (12826), 22 states have internal predecessors, (12826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:02,185 INFO L175 Difference]: Start difference. First operand has 129 places, 154 transitions, 1746 flow. Second operand 21 states and 4322 transitions. [2022-11-25 17:13:02,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 279 transitions, 3379 flow [2022-11-25 17:13:02,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 279 transitions, 3270 flow, removed 39 selfloop flow, removed 4 redundant places. [2022-11-25 17:13:02,272 INFO L231 Difference]: Finished difference. Result has 159 places, 182 transitions, 2415 flow [2022-11-25 17:13:02,272 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2415, PETRI_PLACES=159, PETRI_TRANSITIONS=182} [2022-11-25 17:13:02,273 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 138 predicate places. [2022-11-25 17:13:02,273 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 182 transitions, 2415 flow [2022-11-25 17:13:02,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 201.80769230769232) internal successors, (5247), 26 states have internal predecessors, (5247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:02,274 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:13:02,274 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:02,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:02,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-25 17:13:02,482 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:13:02,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:02,482 INFO L85 PathProgramCache]: Analyzing trace with hash -203424725, now seen corresponding path program 7 times [2022-11-25 17:13:02,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:02,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301332446] [2022-11-25 17:13:02,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:02,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:03,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:03,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301332446] [2022-11-25 17:13:03,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301332446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:03,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666408017] [2022-11-25 17:13:03,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:13:03,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:03,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:03,608 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:03,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:13:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:03,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 17:13:03,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:04,160 INFO L350 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 194 treesize of output 126 [2022-11-25 17:13:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:04,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:06,506 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:13:06,507 INFO L350 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 420 treesize of output 280 [2022-11-25 17:13:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:07,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666408017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:07,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:07,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2022-11-25 17:13:07,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387279115] [2022-11-25 17:13:07,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:07,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:13:07,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:07,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:13:07,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:13:09,045 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 583 [2022-11-25 17:13:09,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 182 transitions, 2415 flow. Second operand has 21 states, 21 states have (on average 209.0) internal successors, (4389), 21 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:09,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:13:09,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 583 [2022-11-25 17:13:09,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:13:12,246 INFO L130 PetriNetUnfolder]: 551/1188 cut-off events. [2022-11-25 17:13:12,246 INFO L131 PetriNetUnfolder]: For 22760/22760 co-relation queries the response was YES. [2022-11-25 17:13:12,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8602 conditions, 1188 events. 551/1188 cut-off events. For 22760/22760 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7442 event pairs, 76 based on Foata normal form. 14/1202 useless extension candidates. Maximal degree in co-relation 8528. Up to 447 conditions per place. [2022-11-25 17:13:12,259 INFO L137 encePairwiseOnDemand]: 575/583 looper letters, 174 selfloop transitions, 106 changer transitions 19/299 dead transitions. [2022-11-25 17:13:12,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 299 transitions, 4118 flow [2022-11-25 17:13:12,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 17:13:12,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 17:13:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4269 transitions. [2022-11-25 17:13:12,267 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3661234991423671 [2022-11-25 17:13:12,268 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4269 transitions. [2022-11-25 17:13:12,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4269 transitions. [2022-11-25 17:13:12,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:13:12,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4269 transitions. [2022-11-25 17:13:12,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 213.45) internal successors, (4269), 20 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:12,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 583.0) internal successors, (12243), 21 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:12,288 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 583.0) internal successors, (12243), 21 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:12,288 INFO L175 Difference]: Start difference. First operand has 159 places, 182 transitions, 2415 flow. Second operand 20 states and 4269 transitions. [2022-11-25 17:13:12,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 299 transitions, 4118 flow [2022-11-25 17:13:12,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 299 transitions, 3679 flow, removed 180 selfloop flow, removed 7 redundant places. [2022-11-25 17:13:12,387 INFO L231 Difference]: Finished difference. Result has 179 places, 207 transitions, 2830 flow [2022-11-25 17:13:12,388 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2830, PETRI_PLACES=179, PETRI_TRANSITIONS=207} [2022-11-25 17:13:12,388 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 158 predicate places. [2022-11-25 17:13:12,388 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 207 transitions, 2830 flow [2022-11-25 17:13:12,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 209.0) internal successors, (4389), 21 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:12,390 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:13:12,390 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:12,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:12,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:12,606 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:13:12,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:12,607 INFO L85 PathProgramCache]: Analyzing trace with hash 352684715, now seen corresponding path program 8 times [2022-11-25 17:13:12,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:12,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147811039] [2022-11-25 17:13:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:12,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:13,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:13,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147811039] [2022-11-25 17:13:13,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147811039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:13,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770076953] [2022-11-25 17:13:13,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:13:13,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:13,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:13,980 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:13,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:13:14,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:13:14,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:13:14,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 17:13:14,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:14,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:13:14,432 INFO L350 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 100 treesize of output 90 [2022-11-25 17:13:14,880 INFO L350 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 215 treesize of output 139 [2022-11-25 17:13:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:15,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:17,199 WARN L837 $PredicateComparison]: unable to prove that (or (= c_~name_1~0 c_~name_2~0) (let ((.cse1 (= 0 c_~break_6~0))) (let ((.cse0 (not .cse1)) (.cse2 (forall ((v_ArrVal_595 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_595) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_1~0))))) (and (or (forall ((v_ArrVal_595 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_595) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_2~0))) (and (or (< (+ 2147483647 c_~name_2~0) c_~name_1~0) (< c_~name_1~0 c_~name_2~0) .cse0) (or (< c_~result_3~0 0) .cse1))) (or (< c_~name_2~0 c_~name_1~0) (< (+ c_~name_1~0 2147483648) c_~name_2~0) .cse2 .cse0) (or .cse2 .cse1 (< 0 c_~result_3~0)))))) is different from false [2022-11-25 17:13:17,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:13:17,278 INFO L350 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 292 treesize of output 210 [2022-11-25 17:13:17,289 INFO L350 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 103 treesize of output 101 [2022-11-25 17:13:17,311 INFO L350 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 101 treesize of output 99 [2022-11-25 17:13:17,319 INFO L350 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 99 treesize of output 97 [2022-11-25 17:13:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:17,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770076953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:17,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:17,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2022-11-25 17:13:17,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618061455] [2022-11-25 17:13:17,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:17,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:13:17,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:17,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:13:17,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=618, Unknown=1, NotChecked=50, Total=756 [2022-11-25 17:13:18,124 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 583 [2022-11-25 17:13:18,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 207 transitions, 2830 flow. Second operand has 28 states, 28 states have (on average 186.75) internal successors, (5229), 28 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:18,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:13:18,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 583 [2022-11-25 17:13:18,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:13:26,947 INFO L130 PetriNetUnfolder]: 837/1832 cut-off events. [2022-11-25 17:13:26,947 INFO L131 PetriNetUnfolder]: For 30416/30416 co-relation queries the response was YES. [2022-11-25 17:13:26,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12923 conditions, 1832 events. 837/1832 cut-off events. For 30416/30416 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 12843 event pairs, 105 based on Foata normal form. 27/1859 useless extension candidates. Maximal degree in co-relation 12842. Up to 523 conditions per place. [2022-11-25 17:13:26,969 INFO L137 encePairwiseOnDemand]: 575/583 looper letters, 208 selfloop transitions, 169 changer transitions 28/405 dead transitions. [2022-11-25 17:13:26,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 405 transitions, 5777 flow [2022-11-25 17:13:26,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 17:13:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-25 17:13:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5358 transitions. [2022-11-25 17:13:26,980 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3282283753981867 [2022-11-25 17:13:26,980 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5358 transitions. [2022-11-25 17:13:26,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5358 transitions. [2022-11-25 17:13:26,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:13:26,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5358 transitions. [2022-11-25 17:13:26,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 191.35714285714286) internal successors, (5358), 28 states have internal predecessors, (5358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:27,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 583.0) internal successors, (16907), 29 states have internal predecessors, (16907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:27,007 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 583.0) internal successors, (16907), 29 states have internal predecessors, (16907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:27,007 INFO L175 Difference]: Start difference. First operand has 179 places, 207 transitions, 2830 flow. Second operand 28 states and 5358 transitions. [2022-11-25 17:13:27,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 405 transitions, 5777 flow [2022-11-25 17:13:27,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 405 transitions, 5523 flow, removed 117 selfloop flow, removed 6 redundant places. [2022-11-25 17:13:27,126 INFO L231 Difference]: Finished difference. Result has 209 places, 277 transitions, 4299 flow [2022-11-25 17:13:27,127 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=2591, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4299, PETRI_PLACES=209, PETRI_TRANSITIONS=277} [2022-11-25 17:13:27,127 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 188 predicate places. [2022-11-25 17:13:27,127 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 277 transitions, 4299 flow [2022-11-25 17:13:27,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 186.75) internal successors, (5229), 28 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:27,128 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:13:27,128 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:27,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:27,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 17:13:27,330 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:13:27,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:27,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1223303057, now seen corresponding path program 9 times [2022-11-25 17:13:27,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:27,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588391494] [2022-11-25 17:13:27,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:27,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:28,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:28,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588391494] [2022-11-25 17:13:28,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588391494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:28,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802883788] [2022-11-25 17:13:28,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:13:28,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:28,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:28,008 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:28,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:13:28,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:13:28,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:13:28,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:13:28,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:28,391 INFO L350 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 17 treesize of output 9 [2022-11-25 17:13:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:28,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:28,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:13:28,709 INFO L350 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 44 treesize of output 30 [2022-11-25 17:13:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:28,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802883788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:28,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:28,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2022-11-25 17:13:28,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836036996] [2022-11-25 17:13:28,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:28,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:13:28,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:28,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:13:28,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:13:29,546 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 583 [2022-11-25 17:13:29,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 277 transitions, 4299 flow. Second operand has 15 states, 15 states have (on average 225.2) internal successors, (3378), 15 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:29,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:13:29,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 583 [2022-11-25 17:13:29,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:13:30,605 INFO L130 PetriNetUnfolder]: 839/1807 cut-off events. [2022-11-25 17:13:30,606 INFO L131 PetriNetUnfolder]: For 32436/32436 co-relation queries the response was YES. [2022-11-25 17:13:30,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13721 conditions, 1807 events. 839/1807 cut-off events. For 32436/32436 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12358 event pairs, 134 based on Foata normal form. 14/1821 useless extension candidates. Maximal degree in co-relation 13631. Up to 534 conditions per place. [2022-11-25 17:13:30,622 INFO L137 encePairwiseOnDemand]: 575/583 looper letters, 246 selfloop transitions, 110 changer transitions 4/360 dead transitions. [2022-11-25 17:13:30,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 360 transitions, 6345 flow [2022-11-25 17:13:30,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:13:30,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:13:30,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3207 transitions. [2022-11-25 17:13:30,628 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39291840235236464 [2022-11-25 17:13:30,628 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3207 transitions. [2022-11-25 17:13:30,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3207 transitions. [2022-11-25 17:13:30,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:13:30,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3207 transitions. [2022-11-25 17:13:30,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 229.07142857142858) internal successors, (3207), 14 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:30,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 583.0) internal successors, (8745), 15 states have internal predecessors, (8745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:30,644 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 583.0) internal successors, (8745), 15 states have internal predecessors, (8745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:30,644 INFO L175 Difference]: Start difference. First operand has 209 places, 277 transitions, 4299 flow. Second operand 14 states and 3207 transitions. [2022-11-25 17:13:30,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 360 transitions, 6345 flow [2022-11-25 17:13:30,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 360 transitions, 5759 flow, removed 276 selfloop flow, removed 11 redundant places. [2022-11-25 17:13:30,835 INFO L231 Difference]: Finished difference. Result has 208 places, 290 transitions, 4435 flow [2022-11-25 17:13:30,836 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=3959, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4435, PETRI_PLACES=208, PETRI_TRANSITIONS=290} [2022-11-25 17:13:30,836 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 187 predicate places. [2022-11-25 17:13:30,837 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 290 transitions, 4435 flow [2022-11-25 17:13:30,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 225.2) internal successors, (3378), 15 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:30,837 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:13:30,838 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:30,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:31,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:31,044 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:13:31,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:31,044 INFO L85 PathProgramCache]: Analyzing trace with hash -65228243, now seen corresponding path program 10 times [2022-11-25 17:13:31,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:31,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483495710] [2022-11-25 17:13:31,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:31,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:31,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:31,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483495710] [2022-11-25 17:13:31,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483495710] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:31,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061994420] [2022-11-25 17:13:31,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:13:31,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:31,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:31,777 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:31,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:13:31,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:13:31,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:13:31,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 17:13:31,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:32,403 INFO L350 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 112 treesize of output 80 [2022-11-25 17:13:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:32,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:32,901 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:13:32,902 INFO L350 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 44 treesize of output 30 [2022-11-25 17:13:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:32,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061994420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:32,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:32,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2022-11-25 17:13:32,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150355277] [2022-11-25 17:13:32,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:32,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:13:32,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:32,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:13:32,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:13:34,246 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 583 [2022-11-25 17:13:34,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 290 transitions, 4435 flow. Second operand has 20 states, 20 states have (on average 222.15) internal successors, (4443), 20 states have internal predecessors, (4443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:34,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:13:34,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 583 [2022-11-25 17:13:34,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:13:36,057 INFO L130 PetriNetUnfolder]: 858/1864 cut-off events. [2022-11-25 17:13:36,057 INFO L131 PetriNetUnfolder]: For 27740/27740 co-relation queries the response was YES. [2022-11-25 17:13:36,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13368 conditions, 1864 events. 858/1864 cut-off events. For 27740/27740 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 12927 event pairs, 207 based on Foata normal form. 12/1876 useless extension candidates. Maximal degree in co-relation 13280. Up to 732 conditions per place. [2022-11-25 17:13:36,080 INFO L137 encePairwiseOnDemand]: 576/583 looper letters, 250 selfloop transitions, 108 changer transitions 1/359 dead transitions. [2022-11-25 17:13:36,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 359 transitions, 5897 flow [2022-11-25 17:13:36,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:13:36,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:13:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3396 transitions. [2022-11-25 17:13:36,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.388336192109777 [2022-11-25 17:13:36,086 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3396 transitions. [2022-11-25 17:13:36,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3396 transitions. [2022-11-25 17:13:36,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:13:36,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3396 transitions. [2022-11-25 17:13:36,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 226.4) internal successors, (3396), 15 states have internal predecessors, (3396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:36,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 583.0) internal successors, (9328), 16 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:36,102 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 583.0) internal successors, (9328), 16 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:36,103 INFO L175 Difference]: Start difference. First operand has 208 places, 290 transitions, 4435 flow. Second operand 15 states and 3396 transitions. [2022-11-25 17:13:36,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 359 transitions, 5897 flow [2022-11-25 17:13:36,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 359 transitions, 5667 flow, removed 20 selfloop flow, removed 7 redundant places. [2022-11-25 17:13:36,348 INFO L231 Difference]: Finished difference. Result has 218 places, 299 transitions, 4688 flow [2022-11-25 17:13:36,349 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=4193, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4688, PETRI_PLACES=218, PETRI_TRANSITIONS=299} [2022-11-25 17:13:36,350 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 197 predicate places. [2022-11-25 17:13:36,350 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 299 transitions, 4688 flow [2022-11-25 17:13:36,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 222.15) internal successors, (4443), 20 states have internal predecessors, (4443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:36,351 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:13:36,351 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:36,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:36,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 17:13:36,559 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:13:36,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:36,559 INFO L85 PathProgramCache]: Analyzing trace with hash -46794217, now seen corresponding path program 11 times [2022-11-25 17:13:36,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:36,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941946925] [2022-11-25 17:13:36,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:36,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:37,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:37,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941946925] [2022-11-25 17:13:37,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941946925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:37,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572746088] [2022-11-25 17:13:37,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:13:37,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:37,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:37,769 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:37,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:13:37,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:13:37,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:13:37,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:13:37,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:38,286 INFO L350 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 17 treesize of output 9 [2022-11-25 17:13:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:38,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:38,548 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-25 17:13:38,549 INFO L350 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 40 treesize of output 21 [2022-11-25 17:13:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:38,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572746088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:38,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:38,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2022-11-25 17:13:38,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428573354] [2022-11-25 17:13:38,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:38,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 17:13:38,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:38,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 17:13:38,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:13:40,853 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 583 [2022-11-25 17:13:40,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 299 transitions, 4688 flow. Second operand has 23 states, 23 states have (on average 214.8695652173913) internal successors, (4942), 23 states have internal predecessors, (4942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:40,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:13:40,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 583 [2022-11-25 17:13:40,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:13:42,685 INFO L130 PetriNetUnfolder]: 912/1941 cut-off events. [2022-11-25 17:13:42,685 INFO L131 PetriNetUnfolder]: For 30154/30154 co-relation queries the response was YES. [2022-11-25 17:13:42,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14141 conditions, 1941 events. 912/1941 cut-off events. For 30154/30154 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13385 event pairs, 72 based on Foata normal form. 28/1969 useless extension candidates. Maximal degree in co-relation 14051. Up to 664 conditions per place. [2022-11-25 17:13:42,707 INFO L137 encePairwiseOnDemand]: 576/583 looper letters, 226 selfloop transitions, 155 changer transitions 1/382 dead transitions. [2022-11-25 17:13:42,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 382 transitions, 6369 flow [2022-11-25 17:13:42,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:13:42,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 17:13:42,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3496 transitions. [2022-11-25 17:13:42,715 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3747855917667238 [2022-11-25 17:13:42,715 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3496 transitions. [2022-11-25 17:13:42,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3496 transitions. [2022-11-25 17:13:42,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:13:42,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3496 transitions. [2022-11-25 17:13:42,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 218.5) internal successors, (3496), 16 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:42,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 583.0) internal successors, (9911), 17 states have internal predecessors, (9911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:42,733 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 583.0) internal successors, (9911), 17 states have internal predecessors, (9911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:42,733 INFO L175 Difference]: Start difference. First operand has 218 places, 299 transitions, 4688 flow. Second operand 16 states and 3496 transitions. [2022-11-25 17:13:42,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 382 transitions, 6369 flow [2022-11-25 17:13:42,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 382 transitions, 6263 flow, removed 24 selfloop flow, removed 8 redundant places. [2022-11-25 17:13:43,006 INFO L231 Difference]: Finished difference. Result has 224 places, 314 transitions, 5292 flow [2022-11-25 17:13:43,007 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=4443, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5292, PETRI_PLACES=224, PETRI_TRANSITIONS=314} [2022-11-25 17:13:43,007 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 203 predicate places. [2022-11-25 17:13:43,007 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 314 transitions, 5292 flow [2022-11-25 17:13:43,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 214.8695652173913) internal successors, (4942), 23 states have internal predecessors, (4942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:43,009 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:13:43,009 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:43,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:43,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 17:13:43,215 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:13:43,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:43,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1879781998, now seen corresponding path program 12 times [2022-11-25 17:13:43,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:43,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10675474] [2022-11-25 17:13:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:43,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:13:44,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:44,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10675474] [2022-11-25 17:13:44,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10675474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:44,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696250163] [2022-11-25 17:13:44,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:13:44,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:44,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:44,636 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:44,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:13:44,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:13:44,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:13:44,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 17:13:44,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:45,105 INFO L350 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 111 treesize of output 79 [2022-11-25 17:13:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:45,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:45,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:13:45,443 INFO L350 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 125 treesize of output 73 [2022-11-25 17:13:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:45,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696250163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:45,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:45,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 22 [2022-11-25 17:13:45,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133862453] [2022-11-25 17:13:45,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:45,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 17:13:45,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:45,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 17:13:45,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:13:47,621 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 583 [2022-11-25 17:13:47,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 314 transitions, 5292 flow. Second operand has 22 states, 22 states have (on average 213.9090909090909) internal successors, (4706), 22 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:47,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:13:47,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 583 [2022-11-25 17:13:47,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:13:49,003 INFO L130 PetriNetUnfolder]: 930/1983 cut-off events. [2022-11-25 17:13:49,003 INFO L131 PetriNetUnfolder]: For 32623/32623 co-relation queries the response was YES. [2022-11-25 17:13:49,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15096 conditions, 1983 events. 930/1983 cut-off events. For 32623/32623 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 13759 event pairs, 427 based on Foata normal form. 4/1987 useless extension candidates. Maximal degree in co-relation 15003. Up to 1849 conditions per place. [2022-11-25 17:13:49,025 INFO L137 encePairwiseOnDemand]: 576/583 looper letters, 294 selfloop transitions, 40 changer transitions 0/334 dead transitions. [2022-11-25 17:13:49,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 334 transitions, 6123 flow [2022-11-25 17:13:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:13:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 17:13:49,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2385 transitions. [2022-11-25 17:13:49,030 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.371900826446281 [2022-11-25 17:13:49,030 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2385 transitions. [2022-11-25 17:13:49,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2385 transitions. [2022-11-25 17:13:49,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:13:49,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2385 transitions. [2022-11-25 17:13:49,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 216.8181818181818) internal successors, (2385), 11 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:49,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 583.0) internal successors, (6996), 12 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:49,042 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 583.0) internal successors, (6996), 12 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:49,042 INFO L175 Difference]: Start difference. First operand has 224 places, 314 transitions, 5292 flow. Second operand 11 states and 2385 transitions. [2022-11-25 17:13:49,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 334 transitions, 6123 flow [2022-11-25 17:13:49,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 334 transitions, 6018 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-25 17:13:49,413 INFO L231 Difference]: Finished difference. Result has 230 places, 316 transitions, 5324 flow [2022-11-25 17:13:49,414 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=5189, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5324, PETRI_PLACES=230, PETRI_TRANSITIONS=316} [2022-11-25 17:13:49,415 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 209 predicate places. [2022-11-25 17:13:49,415 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 316 transitions, 5324 flow [2022-11-25 17:13:49,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 213.9090909090909) internal successors, (4706), 22 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:49,416 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:13:49,416 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:49,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-25 17:13:49,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 17:13:49,623 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:13:49,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:49,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1166641904, now seen corresponding path program 13 times [2022-11-25 17:13:49,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:49,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069131512] [2022-11-25 17:13:49,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:49,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:50,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:50,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069131512] [2022-11-25 17:13:50,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069131512] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:50,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119741698] [2022-11-25 17:13:50,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:13:50,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:50,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:50,546 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:50,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:13:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:50,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 17:13:50,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:51,068 INFO L350 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 17 treesize of output 9 [2022-11-25 17:13:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:51,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:51,472 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:13:51,473 INFO L350 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 62 treesize of output 42 [2022-11-25 17:13:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:51,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119741698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:51,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:51,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2022-11-25 17:13:51,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156142035] [2022-11-25 17:13:51,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:51,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:13:51,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:51,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:13:51,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:13:52,921 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 583 [2022-11-25 17:13:52,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 316 transitions, 5324 flow. Second operand has 19 states, 19 states have (on average 221.05263157894737) internal successors, (4200), 19 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:52,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:13:52,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 583 [2022-11-25 17:13:52,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:13:54,550 INFO L130 PetriNetUnfolder]: 958/2045 cut-off events. [2022-11-25 17:13:54,550 INFO L131 PetriNetUnfolder]: For 33714/33714 co-relation queries the response was YES. [2022-11-25 17:13:54,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15581 conditions, 2045 events. 958/2045 cut-off events. For 33714/33714 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 14380 event pairs, 149 based on Foata normal form. 6/2051 useless extension candidates. Maximal degree in co-relation 15486. Up to 638 conditions per place. [2022-11-25 17:13:54,571 INFO L137 encePairwiseOnDemand]: 575/583 looper letters, 255 selfloop transitions, 116 changer transitions 2/373 dead transitions. [2022-11-25 17:13:54,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 373 transitions, 6885 flow [2022-11-25 17:13:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:13:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:13:54,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3359 transitions. [2022-11-25 17:13:54,576 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3841052029731275 [2022-11-25 17:13:54,576 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3359 transitions. [2022-11-25 17:13:54,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3359 transitions. [2022-11-25 17:13:54,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:13:54,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3359 transitions. [2022-11-25 17:13:54,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 223.93333333333334) internal successors, (3359), 15 states have internal predecessors, (3359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:54,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 583.0) internal successors, (9328), 16 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:54,591 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 583.0) internal successors, (9328), 16 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:54,592 INFO L175 Difference]: Start difference. First operand has 230 places, 316 transitions, 5324 flow. Second operand 15 states and 3359 transitions. [2022-11-25 17:13:54,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 373 transitions, 6885 flow [2022-11-25 17:13:54,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 373 transitions, 6799 flow, removed 3 selfloop flow, removed 9 redundant places. [2022-11-25 17:13:54,897 INFO L231 Difference]: Finished difference. Result has 238 places, 326 transitions, 5687 flow [2022-11-25 17:13:54,898 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=5242, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5687, PETRI_PLACES=238, PETRI_TRANSITIONS=326} [2022-11-25 17:13:54,899 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 217 predicate places. [2022-11-25 17:13:54,899 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 326 transitions, 5687 flow [2022-11-25 17:13:54,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 221.05263157894737) internal successors, (4200), 19 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:54,900 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:13:54,900 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:54,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:55,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 17:13:55,113 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:13:55,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:55,113 INFO L85 PathProgramCache]: Analyzing trace with hash 556123696, now seen corresponding path program 14 times [2022-11-25 17:13:55,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:55,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167890812] [2022-11-25 17:13:55,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:55,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:55,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:55,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167890812] [2022-11-25 17:13:55,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167890812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:55,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038342032] [2022-11-25 17:13:55,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:13:55,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:55,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:55,735 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:55,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:13:55,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:13:55,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:13:55,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 17:13:55,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:56,156 INFO L350 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 133 treesize of output 93 [2022-11-25 17:13:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:56,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:56,534 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:13:56,535 INFO L350 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 65 treesize of output 45 [2022-11-25 17:13:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:13:56,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038342032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:13:56,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:13:56,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-11-25 17:13:56,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054168640] [2022-11-25 17:13:56,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:56,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:13:56,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:56,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:13:56,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:13:57,758 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 583 [2022-11-25 17:13:57,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 326 transitions, 5687 flow. Second operand has 18 states, 18 states have (on average 221.11111111111111) internal successors, (3980), 18 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:57,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:13:57,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 583 [2022-11-25 17:13:57,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:13:59,030 INFO L130 PetriNetUnfolder]: 961/2052 cut-off events. [2022-11-25 17:13:59,030 INFO L131 PetriNetUnfolder]: For 36610/36610 co-relation queries the response was YES. [2022-11-25 17:13:59,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16175 conditions, 2052 events. 961/2052 cut-off events. For 36610/36610 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14383 event pairs, 456 based on Foata normal form. 6/2058 useless extension candidates. Maximal degree in co-relation 16078. Up to 1931 conditions per place. [2022-11-25 17:13:59,049 INFO L137 encePairwiseOnDemand]: 577/583 looper letters, 294 selfloop transitions, 45 changer transitions 0/339 dead transitions. [2022-11-25 17:13:59,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 339 transitions, 6538 flow [2022-11-25 17:13:59,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:13:59,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:13:59,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2237 transitions. [2022-11-25 17:13:59,053 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.383704974271012 [2022-11-25 17:13:59,053 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2237 transitions. [2022-11-25 17:13:59,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2237 transitions. [2022-11-25 17:13:59,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:13:59,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2237 transitions. [2022-11-25 17:13:59,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 223.7) internal successors, (2237), 10 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:59,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 583.0) internal successors, (6413), 11 states have internal predecessors, (6413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:59,062 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 583.0) internal successors, (6413), 11 states have internal predecessors, (6413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:59,062 INFO L175 Difference]: Start difference. First operand has 238 places, 326 transitions, 5687 flow. Second operand 10 states and 2237 transitions. [2022-11-25 17:13:59,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 339 transitions, 6538 flow [2022-11-25 17:13:59,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 339 transitions, 6358 flow, removed 40 selfloop flow, removed 6 redundant places. [2022-11-25 17:13:59,297 INFO L231 Difference]: Finished difference. Result has 242 places, 328 transitions, 5708 flow [2022-11-25 17:13:59,298 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=5481, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5708, PETRI_PLACES=242, PETRI_TRANSITIONS=328} [2022-11-25 17:13:59,299 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 221 predicate places. [2022-11-25 17:13:59,299 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 328 transitions, 5708 flow [2022-11-25 17:13:59,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 221.11111111111111) internal successors, (3980), 18 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:13:59,301 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:13:59,301 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:59,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:59,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 17:13:59,504 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:13:59,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:59,504 INFO L85 PathProgramCache]: Analyzing trace with hash -938115881, now seen corresponding path program 15 times [2022-11-25 17:13:59,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:59,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277895366] [2022-11-25 17:13:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:59,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:00,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:00,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277895366] [2022-11-25 17:14:00,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277895366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:00,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124487735] [2022-11-25 17:14:00,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:14:00,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:00,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:00,667 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:00,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:14:00,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:14:00,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:14:00,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 17:14:00,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:01,131 INFO L350 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 112 treesize of output 80 [2022-11-25 17:14:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:01,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:01,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:14:01,573 INFO L350 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 65 treesize of output 45 [2022-11-25 17:14:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:01,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124487735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:01,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:01,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 25 [2022-11-25 17:14:01,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336368036] [2022-11-25 17:14:01,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:01,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:14:01,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:01,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:14:01,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:14:03,504 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 583 [2022-11-25 17:14:03,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 328 transitions, 5708 flow. Second operand has 25 states, 25 states have (on average 212.04) internal successors, (5301), 25 states have internal predecessors, (5301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:03,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:14:03,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 583 [2022-11-25 17:14:03,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:14:08,551 INFO L130 PetriNetUnfolder]: 2095/4466 cut-off events. [2022-11-25 17:14:08,551 INFO L131 PetriNetUnfolder]: For 86733/86733 co-relation queries the response was YES. [2022-11-25 17:14:08,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35237 conditions, 4466 events. 2095/4466 cut-off events. For 86733/86733 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 36519 event pairs, 872 based on Foata normal form. 52/4518 useless extension candidates. Maximal degree in co-relation 34840. Up to 1881 conditions per place. [2022-11-25 17:14:08,597 INFO L137 encePairwiseOnDemand]: 574/583 looper letters, 690 selfloop transitions, 162 changer transitions 0/852 dead transitions. [2022-11-25 17:14:08,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 852 transitions, 15389 flow [2022-11-25 17:14:08,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-25 17:14:08,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-25 17:14:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 9918 transitions. [2022-11-25 17:14:08,610 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3698262361100753 [2022-11-25 17:14:08,610 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 9918 transitions. [2022-11-25 17:14:08,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 9918 transitions. [2022-11-25 17:14:08,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:14:08,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 9918 transitions. [2022-11-25 17:14:08,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 215.6086956521739) internal successors, (9918), 46 states have internal predecessors, (9918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:08,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 583.0) internal successors, (27401), 47 states have internal predecessors, (27401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:08,653 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 583.0) internal successors, (27401), 47 states have internal predecessors, (27401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:08,654 INFO L175 Difference]: Start difference. First operand has 242 places, 328 transitions, 5708 flow. Second operand 46 states and 9918 transitions. [2022-11-25 17:14:08,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 852 transitions, 15389 flow [2022-11-25 17:14:09,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 852 transitions, 15197 flow, removed 22 selfloop flow, removed 7 redundant places. [2022-11-25 17:14:09,641 INFO L231 Difference]: Finished difference. Result has 304 places, 445 transitions, 8675 flow [2022-11-25 17:14:09,642 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=5611, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=8675, PETRI_PLACES=304, PETRI_TRANSITIONS=445} [2022-11-25 17:14:09,643 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 283 predicate places. [2022-11-25 17:14:09,643 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 445 transitions, 8675 flow [2022-11-25 17:14:09,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 212.04) internal successors, (5301), 25 states have internal predecessors, (5301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:09,644 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:14:09,644 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:09,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-25 17:14:09,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:09,845 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:14:09,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:09,846 INFO L85 PathProgramCache]: Analyzing trace with hash 103996047, now seen corresponding path program 16 times [2022-11-25 17:14:09,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:09,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932866819] [2022-11-25 17:14:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:09,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:10,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:10,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932866819] [2022-11-25 17:14:10,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932866819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:10,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760628855] [2022-11-25 17:14:10,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:14:10,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:10,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:10,801 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:10,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:14:10,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:14:10,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:14:10,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 17:14:10,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:11,287 INFO L350 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 131 treesize of output 91 [2022-11-25 17:14:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:11,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:11,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:14:11,801 INFO L350 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 125 treesize of output 73 [2022-11-25 17:14:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:11,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760628855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:11,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:11,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2022-11-25 17:14:11,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848538105] [2022-11-25 17:14:11,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:11,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:14:11,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:11,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:14:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:14:13,071 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 583 [2022-11-25 17:14:13,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 445 transitions, 8675 flow. Second operand has 18 states, 18 states have (on average 221.22222222222223) internal successors, (3982), 18 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:13,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:14:13,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 583 [2022-11-25 17:14:13,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:14:15,342 INFO L130 PetriNetUnfolder]: 2123/4534 cut-off events. [2022-11-25 17:14:15,343 INFO L131 PetriNetUnfolder]: For 115419/115419 co-relation queries the response was YES. [2022-11-25 17:14:15,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38606 conditions, 4534 events. 2123/4534 cut-off events. For 115419/115419 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37181 event pairs, 964 based on Foata normal form. 36/4570 useless extension candidates. Maximal degree in co-relation 38221. Up to 4058 conditions per place. [2022-11-25 17:14:15,396 INFO L137 encePairwiseOnDemand]: 576/583 looper letters, 379 selfloop transitions, 98 changer transitions 0/477 dead transitions. [2022-11-25 17:14:15,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 477 transitions, 9904 flow [2022-11-25 17:14:15,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:14:15,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:14:15,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2919 transitions. [2022-11-25 17:14:15,400 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38514315872806437 [2022-11-25 17:14:15,400 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2919 transitions. [2022-11-25 17:14:15,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2919 transitions. [2022-11-25 17:14:15,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:14:15,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2919 transitions. [2022-11-25 17:14:15,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 224.53846153846155) internal successors, (2919), 13 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:15,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 583.0) internal successors, (8162), 14 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:15,408 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 583.0) internal successors, (8162), 14 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:15,408 INFO L175 Difference]: Start difference. First operand has 304 places, 445 transitions, 8675 flow. Second operand 13 states and 2919 transitions. [2022-11-25 17:14:15,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 477 transitions, 9904 flow [2022-11-25 17:14:16,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 477 transitions, 9112 flow, removed 349 selfloop flow, removed 8 redundant places. [2022-11-25 17:14:16,613 INFO L231 Difference]: Finished difference. Result has 307 places, 445 transitions, 8166 flow [2022-11-25 17:14:16,614 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=7762, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8166, PETRI_PLACES=307, PETRI_TRANSITIONS=445} [2022-11-25 17:14:16,614 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 286 predicate places. [2022-11-25 17:14:16,614 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 445 transitions, 8166 flow [2022-11-25 17:14:16,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 221.22222222222223) internal successors, (3982), 18 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:16,615 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:14:16,615 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:16,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:14:16,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:16,817 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:14:16,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:16,817 INFO L85 PathProgramCache]: Analyzing trace with hash -105476649, now seen corresponding path program 17 times [2022-11-25 17:14:16,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:16,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194195545] [2022-11-25 17:14:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:16,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:17,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:17,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194195545] [2022-11-25 17:14:17,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194195545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:17,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914148181] [2022-11-25 17:14:17,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:14:17,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:17,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:17,704 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:17,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:14:17,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:14:17,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:14:17,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:14:17,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:18,210 INFO L350 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 17 treesize of output 9 [2022-11-25 17:14:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:18,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:18,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:14:18,536 INFO L350 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 62 treesize of output 42 [2022-11-25 17:14:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:18,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914148181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:18,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:18,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 24 [2022-11-25 17:14:18,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029779414] [2022-11-25 17:14:18,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:18,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:14:18,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:18,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:14:18,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:14:20,633 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 583 [2022-11-25 17:14:20,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 445 transitions, 8166 flow. Second operand has 24 states, 24 states have (on average 214.125) internal successors, (5139), 24 states have internal predecessors, (5139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:20,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:14:20,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 583 [2022-11-25 17:14:20,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:14:23,377 INFO L130 PetriNetUnfolder]: 2073/4408 cut-off events. [2022-11-25 17:14:23,377 INFO L131 PetriNetUnfolder]: For 104371/104371 co-relation queries the response was YES. [2022-11-25 17:14:23,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36744 conditions, 4408 events. 2073/4408 cut-off events. For 104371/104371 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 35789 event pairs, 546 based on Foata normal form. 40/4448 useless extension candidates. Maximal degree in co-relation 36618. Up to 2545 conditions per place. [2022-11-25 17:14:23,428 INFO L137 encePairwiseOnDemand]: 576/583 looper letters, 326 selfloop transitions, 142 changer transitions 1/469 dead transitions. [2022-11-25 17:14:23,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 469 transitions, 9293 flow [2022-11-25 17:14:23,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:14:23,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:14:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2817 transitions. [2022-11-25 17:14:23,434 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37168491885473015 [2022-11-25 17:14:23,434 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2817 transitions. [2022-11-25 17:14:23,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2817 transitions. [2022-11-25 17:14:23,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:14:23,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2817 transitions. [2022-11-25 17:14:23,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 216.69230769230768) internal successors, (2817), 13 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:23,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 583.0) internal successors, (8162), 14 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:23,451 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 583.0) internal successors, (8162), 14 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:23,451 INFO L175 Difference]: Start difference. First operand has 307 places, 445 transitions, 8166 flow. Second operand 13 states and 2817 transitions. [2022-11-25 17:14:23,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 469 transitions, 9293 flow [2022-11-25 17:14:24,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 469 transitions, 9074 flow, removed 32 selfloop flow, removed 9 redundant places. [2022-11-25 17:14:24,416 INFO L231 Difference]: Finished difference. Result has 310 places, 431 transitions, 7969 flow [2022-11-25 17:14:24,417 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=7685, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7969, PETRI_PLACES=310, PETRI_TRANSITIONS=431} [2022-11-25 17:14:24,417 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 289 predicate places. [2022-11-25 17:14:24,417 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 431 transitions, 7969 flow [2022-11-25 17:14:24,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 214.125) internal successors, (5139), 24 states have internal predecessors, (5139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:24,418 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:14:24,419 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:24,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:14:24,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-25 17:14:24,621 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:14:24,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:24,621 INFO L85 PathProgramCache]: Analyzing trace with hash 570690351, now seen corresponding path program 18 times [2022-11-25 17:14:24,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:24,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902991928] [2022-11-25 17:14:24,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:24,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:25,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:25,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902991928] [2022-11-25 17:14:25,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902991928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:25,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918882697] [2022-11-25 17:14:25,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:14:25,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:25,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:25,192 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:25,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:14:25,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:14:25,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:14:25,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:14:25,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:25,697 INFO L350 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 93 treesize of output 61 [2022-11-25 17:14:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:25,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:25,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:14:25,951 INFO L350 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 95 treesize of output 59 [2022-11-25 17:14:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:26,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918882697] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:26,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:26,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-11-25 17:14:26,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49898687] [2022-11-25 17:14:26,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:26,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:14:26,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:26,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:14:26,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:14:27,223 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 583 [2022-11-25 17:14:27,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 431 transitions, 7969 flow. Second operand has 18 states, 18 states have (on average 221.0) internal successors, (3978), 18 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:27,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:14:27,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 583 [2022-11-25 17:14:27,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:14:29,620 INFO L130 PetriNetUnfolder]: 2057/4344 cut-off events. [2022-11-25 17:14:29,621 INFO L131 PetriNetUnfolder]: For 105415/105415 co-relation queries the response was YES. [2022-11-25 17:14:29,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36833 conditions, 4344 events. 2057/4344 cut-off events. For 105415/105415 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 34960 event pairs, 962 based on Foata normal form. 4/4348 useless extension candidates. Maximal degree in co-relation 36708. Up to 4076 conditions per place. [2022-11-25 17:14:29,660 INFO L137 encePairwiseOnDemand]: 577/583 looper letters, 354 selfloop transitions, 82 changer transitions 5/441 dead transitions. [2022-11-25 17:14:29,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 441 transitions, 8911 flow [2022-11-25 17:14:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:14:29,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:14:29,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2012 transitions. [2022-11-25 17:14:29,664 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3834572136458929 [2022-11-25 17:14:29,664 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2012 transitions. [2022-11-25 17:14:29,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2012 transitions. [2022-11-25 17:14:29,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:14:29,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2012 transitions. [2022-11-25 17:14:29,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 223.55555555555554) internal successors, (2012), 9 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:29,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 583.0) internal successors, (5830), 10 states have internal predecessors, (5830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:29,673 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 583.0) internal successors, (5830), 10 states have internal predecessors, (5830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:29,674 INFO L175 Difference]: Start difference. First operand has 310 places, 431 transitions, 7969 flow. Second operand 9 states and 2012 transitions. [2022-11-25 17:14:29,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 441 transitions, 8911 flow [2022-11-25 17:14:30,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 441 transitions, 8751 flow, removed 2 selfloop flow, removed 10 redundant places. [2022-11-25 17:14:30,355 INFO L231 Difference]: Finished difference. Result has 308 places, 427 transitions, 7895 flow [2022-11-25 17:14:30,355 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=7790, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7895, PETRI_PLACES=308, PETRI_TRANSITIONS=427} [2022-11-25 17:14:30,355 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 287 predicate places. [2022-11-25 17:14:30,355 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 427 transitions, 7895 flow [2022-11-25 17:14:30,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 221.0) internal successors, (3978), 18 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:30,356 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:14:30,356 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:30,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:14:30,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:30,557 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:14:30,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:30,557 INFO L85 PathProgramCache]: Analyzing trace with hash -985046798, now seen corresponding path program 19 times [2022-11-25 17:14:30,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:30,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427574188] [2022-11-25 17:14:30,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:30,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:31,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:31,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427574188] [2022-11-25 17:14:31,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427574188] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:31,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434802839] [2022-11-25 17:14:31,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:14:31,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:31,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:31,253 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:31,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 17:14:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:31,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 17:14:31,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:31,634 INFO L350 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 17 treesize of output 9 [2022-11-25 17:14:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:31,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:31,996 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-25 17:14:31,996 INFO L350 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 40 treesize of output 21 [2022-11-25 17:14:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:32,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434802839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:32,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:32,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-11-25 17:14:32,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706123297] [2022-11-25 17:14:32,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:32,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:14:32,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:32,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:14:32,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:14:33,431 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 583 [2022-11-25 17:14:33,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 427 transitions, 7895 flow. Second operand has 18 states, 18 states have (on average 222.11111111111111) internal successors, (3998), 18 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:33,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:14:33,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 583 [2022-11-25 17:14:33,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:14:36,401 INFO L130 PetriNetUnfolder]: 2113/4460 cut-off events. [2022-11-25 17:14:36,401 INFO L131 PetriNetUnfolder]: For 104955/104955 co-relation queries the response was YES. [2022-11-25 17:14:36,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37735 conditions, 4460 events. 2113/4460 cut-off events. For 104955/104955 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 36243 event pairs, 16 based on Foata normal form. 16/4476 useless extension candidates. Maximal degree in co-relation 37612. Up to 861 conditions per place. [2022-11-25 17:14:36,444 INFO L137 encePairwiseOnDemand]: 575/583 looper letters, 253 selfloop transitions, 278 changer transitions 3/534 dead transitions. [2022-11-25 17:14:36,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 534 transitions, 10546 flow [2022-11-25 17:14:36,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 17:14:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 17:14:36,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4056 transitions. [2022-11-25 17:14:36,450 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3865065751858205 [2022-11-25 17:14:36,450 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4056 transitions. [2022-11-25 17:14:36,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4056 transitions. [2022-11-25 17:14:36,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:14:36,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4056 transitions. [2022-11-25 17:14:36,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 225.33333333333334) internal successors, (4056), 18 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:36,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 583.0) internal successors, (11077), 19 states have internal predecessors, (11077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:36,469 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 583.0) internal successors, (11077), 19 states have internal predecessors, (11077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:36,469 INFO L175 Difference]: Start difference. First operand has 308 places, 427 transitions, 7895 flow. Second operand 18 states and 4056 transitions. [2022-11-25 17:14:36,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 534 transitions, 10546 flow [2022-11-25 17:14:37,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 534 transitions, 10374 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:14:37,278 INFO L231 Difference]: Finished difference. Result has 320 places, 458 transitions, 9186 flow [2022-11-25 17:14:37,278 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=7731, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9186, PETRI_PLACES=320, PETRI_TRANSITIONS=458} [2022-11-25 17:14:37,279 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 299 predicate places. [2022-11-25 17:14:37,279 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 458 transitions, 9186 flow [2022-11-25 17:14:37,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 222.11111111111111) internal successors, (3998), 18 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:37,280 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:14:37,280 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:37,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:14:37,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-25 17:14:37,481 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:14:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:37,481 INFO L85 PathProgramCache]: Analyzing trace with hash -54848977, now seen corresponding path program 20 times [2022-11-25 17:14:37,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:37,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138974220] [2022-11-25 17:14:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:37,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:38,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:38,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138974220] [2022-11-25 17:14:38,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138974220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:38,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716289291] [2022-11-25 17:14:38,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:14:38,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:38,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:38,310 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:38,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 17:14:38,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:14:38,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:14:38,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 17:14:38,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:38,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:14:38,764 INFO L350 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 23 treesize of output 23 [2022-11-25 17:14:38,885 INFO L350 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 17 treesize of output 9 [2022-11-25 17:14:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:38,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:39,137 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1054 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1054) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_1~0))) (forall ((v_ArrVal_1054 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1054) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_2~0))) (not (= c_~name_1~0 c_~name_2~0))) is different from false [2022-11-25 17:14:39,221 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:14:39,222 INFO L350 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 74 treesize of output 60 [2022-11-25 17:14:39,227 INFO L350 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 43 treesize of output 41 [2022-11-25 17:14:39,232 INFO L350 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 41 treesize of output 39 [2022-11-25 17:14:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:39,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716289291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:39,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:39,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 23 [2022-11-25 17:14:39,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113049547] [2022-11-25 17:14:39,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:39,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:14:39,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:39,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:14:39,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=423, Unknown=1, NotChecked=42, Total=552 [2022-11-25 17:14:39,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 583 [2022-11-25 17:14:39,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 458 transitions, 9186 flow. Second operand has 24 states, 24 states have (on average 195.875) internal successors, (4701), 24 states have internal predecessors, (4701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:39,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:14:39,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 583 [2022-11-25 17:14:39,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:14:43,087 INFO L130 PetriNetUnfolder]: 2213/4548 cut-off events. [2022-11-25 17:14:43,087 INFO L131 PetriNetUnfolder]: For 128690/128690 co-relation queries the response was YES. [2022-11-25 17:14:43,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40741 conditions, 4548 events. 2213/4548 cut-off events. For 128690/128690 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 36147 event pairs, 258 based on Foata normal form. 64/4612 useless extension candidates. Maximal degree in co-relation 40614. Up to 1474 conditions per place. [2022-11-25 17:14:43,143 INFO L137 encePairwiseOnDemand]: 573/583 looper letters, 294 selfloop transitions, 317 changer transitions 0/611 dead transitions. [2022-11-25 17:14:43,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 611 transitions, 12920 flow [2022-11-25 17:14:43,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:14:43,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 17:14:43,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3802 transitions. [2022-11-25 17:14:43,149 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34323372754355874 [2022-11-25 17:14:43,149 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3802 transitions. [2022-11-25 17:14:43,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3802 transitions. [2022-11-25 17:14:43,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:14:43,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3802 transitions. [2022-11-25 17:14:43,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 200.10526315789474) internal successors, (3802), 19 states have internal predecessors, (3802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:43,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 583.0) internal successors, (11660), 20 states have internal predecessors, (11660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:43,163 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 583.0) internal successors, (11660), 20 states have internal predecessors, (11660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:43,163 INFO L175 Difference]: Start difference. First operand has 320 places, 458 transitions, 9186 flow. Second operand 19 states and 3802 transitions. [2022-11-25 17:14:43,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 611 transitions, 12920 flow [2022-11-25 17:14:44,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 611 transitions, 12117 flow, removed 322 selfloop flow, removed 9 redundant places. [2022-11-25 17:14:44,378 INFO L231 Difference]: Finished difference. Result has 334 places, 547 transitions, 11247 flow [2022-11-25 17:14:44,378 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=8622, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=11247, PETRI_PLACES=334, PETRI_TRANSITIONS=547} [2022-11-25 17:14:44,379 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 313 predicate places. [2022-11-25 17:14:44,379 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 547 transitions, 11247 flow [2022-11-25 17:14:44,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 195.875) internal successors, (4701), 24 states have internal predecessors, (4701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:44,379 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:14:44,379 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:44,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 17:14:44,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-25 17:14:44,580 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:14:44,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:44,581 INFO L85 PathProgramCache]: Analyzing trace with hash -2045065811, now seen corresponding path program 21 times [2022-11-25 17:14:44,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:44,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382102791] [2022-11-25 17:14:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:44,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:45,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:45,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382102791] [2022-11-25 17:14:45,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382102791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:45,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038749158] [2022-11-25 17:14:45,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:14:45,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:45,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:45,140 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:45,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 17:14:45,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:14:45,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:14:45,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 17:14:45,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:45,726 INFO L350 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 93 treesize of output 61 [2022-11-25 17:14:45,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:45,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:45,982 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:14:45,982 INFO L350 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 117 treesize of output 71 [2022-11-25 17:14:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:46,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038749158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:46,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:46,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-11-25 17:14:46,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132505741] [2022-11-25 17:14:46,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:46,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:14:46,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:46,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:14:46,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:14:47,322 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 583 [2022-11-25 17:14:47,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 547 transitions, 11247 flow. Second operand has 18 states, 18 states have (on average 223.0) internal successors, (4014), 18 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:47,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:14:47,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 583 [2022-11-25 17:14:47,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:14:50,181 INFO L130 PetriNetUnfolder]: 2237/4616 cut-off events. [2022-11-25 17:14:50,181 INFO L131 PetriNetUnfolder]: For 109886/109886 co-relation queries the response was YES. [2022-11-25 17:14:50,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42534 conditions, 4616 events. 2237/4616 cut-off events. For 109886/109886 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 36845 event pairs, 430 based on Foata normal form. 12/4628 useless extension candidates. Maximal degree in co-relation 42406. Up to 2502 conditions per place. [2022-11-25 17:14:50,225 INFO L137 encePairwiseOnDemand]: 577/583 looper letters, 384 selfloop transitions, 225 changer transitions 4/613 dead transitions. [2022-11-25 17:14:50,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 613 transitions, 13486 flow [2022-11-25 17:14:50,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:14:50,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 17:14:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2500 transitions. [2022-11-25 17:14:50,230 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.389833151411196 [2022-11-25 17:14:50,230 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2500 transitions. [2022-11-25 17:14:50,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2500 transitions. [2022-11-25 17:14:50,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:14:50,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2500 transitions. [2022-11-25 17:14:50,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 227.27272727272728) internal successors, (2500), 11 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:50,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 583.0) internal successors, (6996), 12 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:50,235 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 583.0) internal successors, (6996), 12 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:50,236 INFO L175 Difference]: Start difference. First operand has 334 places, 547 transitions, 11247 flow. Second operand 11 states and 2500 transitions. [2022-11-25 17:14:50,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 613 transitions, 13486 flow [2022-11-25 17:14:51,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 613 transitions, 13101 flow, removed 130 selfloop flow, removed 5 redundant places. [2022-11-25 17:14:51,397 INFO L231 Difference]: Finished difference. Result has 342 places, 549 transitions, 11535 flow [2022-11-25 17:14:51,398 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=10878, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11535, PETRI_PLACES=342, PETRI_TRANSITIONS=549} [2022-11-25 17:14:51,398 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 321 predicate places. [2022-11-25 17:14:51,399 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 549 transitions, 11535 flow [2022-11-25 17:14:51,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 223.0) internal successors, (4014), 18 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:51,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:14:51,400 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:51,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 17:14:51,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-25 17:14:51,601 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:14:51,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:51,601 INFO L85 PathProgramCache]: Analyzing trace with hash -640971773, now seen corresponding path program 22 times [2022-11-25 17:14:51,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:51,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159069145] [2022-11-25 17:14:51,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:51,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:52,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:52,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159069145] [2022-11-25 17:14:52,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159069145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:52,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880160411] [2022-11-25 17:14:52,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:14:52,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:52,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:52,369 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:52,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 17:14:52,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:14:52,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:14:52,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 17:14:52,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:52,891 INFO L350 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 72 treesize of output 48 [2022-11-25 17:14:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:52,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:53,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:14:53,117 INFO L350 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 117 treesize of output 71 [2022-11-25 17:14:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:53,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880160411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:53,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:53,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2022-11-25 17:14:53,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536468042] [2022-11-25 17:14:53,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:53,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:14:53,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:53,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:14:53,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:14:54,488 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 583 [2022-11-25 17:14:54,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 549 transitions, 11535 flow. Second operand has 20 states, 20 states have (on average 220.9) internal successors, (4418), 20 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:54,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:14:54,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 583 [2022-11-25 17:14:54,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:14:56,852 INFO L130 PetriNetUnfolder]: 2219/4556 cut-off events. [2022-11-25 17:14:56,852 INFO L131 PetriNetUnfolder]: For 109371/109371 co-relation queries the response was YES. [2022-11-25 17:14:56,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42386 conditions, 4556 events. 2219/4556 cut-off events. For 109371/109371 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 36085 event pairs, 422 based on Foata normal form. 4/4560 useless extension candidates. Maximal degree in co-relation 42256. Up to 2502 conditions per place. [2022-11-25 17:14:56,900 INFO L137 encePairwiseOnDemand]: 577/583 looper letters, 348 selfloop transitions, 230 changer transitions 7/585 dead transitions. [2022-11-25 17:14:56,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 585 transitions, 13156 flow [2022-11-25 17:14:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:14:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:14:56,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1796 transitions. [2022-11-25 17:14:56,903 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3850771869639794 [2022-11-25 17:14:56,904 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1796 transitions. [2022-11-25 17:14:56,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1796 transitions. [2022-11-25 17:14:56,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:14:56,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1796 transitions. [2022-11-25 17:14:56,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 224.5) internal successors, (1796), 8 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:56,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 583.0) internal successors, (5247), 9 states have internal predecessors, (5247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:56,908 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 583.0) internal successors, (5247), 9 states have internal predecessors, (5247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:56,908 INFO L175 Difference]: Start difference. First operand has 342 places, 549 transitions, 11535 flow. Second operand 8 states and 1796 transitions. [2022-11-25 17:14:56,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 585 transitions, 13156 flow [2022-11-25 17:14:57,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 585 transitions, 12811 flow, removed 53 selfloop flow, removed 6 redundant places. [2022-11-25 17:14:57,794 INFO L231 Difference]: Finished difference. Result has 341 places, 543 transitions, 11490 flow [2022-11-25 17:14:57,794 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=11172, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11490, PETRI_PLACES=341, PETRI_TRANSITIONS=543} [2022-11-25 17:14:57,794 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 320 predicate places. [2022-11-25 17:14:57,794 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 543 transitions, 11490 flow [2022-11-25 17:14:57,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 220.9) internal successors, (4418), 20 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:57,795 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:14:57,795 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:57,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-25 17:14:57,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-25 17:14:57,996 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:14:57,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:57,996 INFO L85 PathProgramCache]: Analyzing trace with hash -262530032, now seen corresponding path program 23 times [2022-11-25 17:14:57,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:57,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997199128] [2022-11-25 17:14:57,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:57,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:58,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:58,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997199128] [2022-11-25 17:14:58,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997199128] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:58,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832456000] [2022-11-25 17:14:58,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:14:58,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:58,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:58,729 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:58,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 17:14:58,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:14:58,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:14:58,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 17:14:58,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:59,246 INFO L350 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 133 treesize of output 93 [2022-11-25 17:14:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:59,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:59,629 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:14:59,629 INFO L350 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 44 treesize of output 30 [2022-11-25 17:14:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:14:59,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832456000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:59,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:59,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-11-25 17:14:59,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647861400] [2022-11-25 17:14:59,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:59,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:14:59,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:59,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:14:59,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:15:01,121 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 583 [2022-11-25 17:15:01,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 543 transitions, 11490 flow. Second operand has 18 states, 18 states have (on average 221.05555555555554) internal successors, (3979), 18 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:01,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:01,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 583 [2022-11-25 17:15:01,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:04,056 INFO L130 PetriNetUnfolder]: 2297/4722 cut-off events. [2022-11-25 17:15:04,057 INFO L131 PetriNetUnfolder]: For 112008/112008 co-relation queries the response was YES. [2022-11-25 17:15:04,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44171 conditions, 4722 events. 2297/4722 cut-off events. For 112008/112008 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 37717 event pairs, 68 based on Foata normal form. 8/4730 useless extension candidates. Maximal degree in co-relation 44042. Up to 2148 conditions per place. [2022-11-25 17:15:04,116 INFO L137 encePairwiseOnDemand]: 577/583 looper letters, 364 selfloop transitions, 261 changer transitions 0/625 dead transitions. [2022-11-25 17:15:04,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 625 transitions, 13936 flow [2022-11-25 17:15:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:15:04,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 17:15:04,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3592 transitions. [2022-11-25 17:15:04,125 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3850771869639794 [2022-11-25 17:15:04,125 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3592 transitions. [2022-11-25 17:15:04,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3592 transitions. [2022-11-25 17:15:04,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:04,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3592 transitions. [2022-11-25 17:15:04,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 224.5) internal successors, (3592), 16 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:04,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 583.0) internal successors, (9911), 17 states have internal predecessors, (9911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:04,146 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 583.0) internal successors, (9911), 17 states have internal predecessors, (9911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:04,147 INFO L175 Difference]: Start difference. First operand has 341 places, 543 transitions, 11490 flow. Second operand 16 states and 3592 transitions. [2022-11-25 17:15:04,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 625 transitions, 13936 flow [2022-11-25 17:15:05,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 625 transitions, 13475 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-11-25 17:15:05,163 INFO L231 Difference]: Finished difference. Result has 351 places, 556 transitions, 11980 flow [2022-11-25 17:15:05,164 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=11041, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=11980, PETRI_PLACES=351, PETRI_TRANSITIONS=556} [2022-11-25 17:15:05,164 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 330 predicate places. [2022-11-25 17:15:05,165 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 556 transitions, 11980 flow [2022-11-25 17:15:05,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 221.05555555555554) internal successors, (3979), 18 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:05,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:05,166 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:05,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:05,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:05,372 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:15:05,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:05,373 INFO L85 PathProgramCache]: Analyzing trace with hash 666031887, now seen corresponding path program 24 times [2022-11-25 17:15:05,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:05,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607518515] [2022-11-25 17:15:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:05,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:05,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:05,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607518515] [2022-11-25 17:15:05,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607518515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:05,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380238089] [2022-11-25 17:15:05,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:15:05,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:05,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:05,981 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:05,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 17:15:06,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:15:06,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:06,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 17:15:06,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:06,576 INFO L350 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 130 treesize of output 90 [2022-11-25 17:15:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:06,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:06,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:06,966 INFO L350 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 95 treesize of output 59 [2022-11-25 17:15:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:07,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380238089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:07,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:07,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2022-11-25 17:15:07,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331030528] [2022-11-25 17:15:07,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:07,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:15:07,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:07,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:15:07,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:15:08,019 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 583 [2022-11-25 17:15:08,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 556 transitions, 11980 flow. Second operand has 17 states, 17 states have (on average 221.1764705882353) internal successors, (3760), 17 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:08,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:08,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 583 [2022-11-25 17:15:08,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:10,403 INFO L130 PetriNetUnfolder]: 2299/4736 cut-off events. [2022-11-25 17:15:10,403 INFO L131 PetriNetUnfolder]: For 121146/121146 co-relation queries the response was YES. [2022-11-25 17:15:10,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44664 conditions, 4736 events. 2299/4736 cut-off events. For 121146/121146 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 37873 event pairs, 804 based on Foata normal form. 26/4762 useless extension candidates. Maximal degree in co-relation 44532. Up to 4126 conditions per place. [2022-11-25 17:15:10,463 INFO L137 encePairwiseOnDemand]: 577/583 looper letters, 489 selfloop transitions, 99 changer transitions 0/588 dead transitions. [2022-11-25 17:15:10,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 588 transitions, 13503 flow [2022-11-25 17:15:10,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:15:10,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:15:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2245 transitions. [2022-11-25 17:15:10,466 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3850771869639794 [2022-11-25 17:15:10,466 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2245 transitions. [2022-11-25 17:15:10,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2245 transitions. [2022-11-25 17:15:10,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:10,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2245 transitions. [2022-11-25 17:15:10,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 224.5) internal successors, (2245), 10 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:10,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 583.0) internal successors, (6413), 11 states have internal predecessors, (6413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:10,472 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 583.0) internal successors, (6413), 11 states have internal predecessors, (6413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:10,472 INFO L175 Difference]: Start difference. First operand has 351 places, 556 transitions, 11980 flow. Second operand 10 states and 2245 transitions. [2022-11-25 17:15:10,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 588 transitions, 13503 flow [2022-11-25 17:15:11,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 588 transitions, 13183 flow, removed 43 selfloop flow, removed 11 redundant places. [2022-11-25 17:15:11,540 INFO L231 Difference]: Finished difference. Result has 350 places, 554 transitions, 11833 flow [2022-11-25 17:15:11,541 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=11472, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11833, PETRI_PLACES=350, PETRI_TRANSITIONS=554} [2022-11-25 17:15:11,542 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 329 predicate places. [2022-11-25 17:15:11,542 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 554 transitions, 11833 flow [2022-11-25 17:15:11,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 221.1764705882353) internal successors, (3760), 17 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:11,543 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:11,543 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:11,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:11,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-25 17:15:11,750 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:15:11,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:11,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1449980079, now seen corresponding path program 25 times [2022-11-25 17:15:11,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:11,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99086357] [2022-11-25 17:15:11,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:11,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:12,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:12,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99086357] [2022-11-25 17:15:12,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99086357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:12,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907963878] [2022-11-25 17:15:12,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:15:12,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:12,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:12,685 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:12,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 17:15:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:12,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:15:12,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:13,165 INFO L350 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 133 treesize of output 93 [2022-11-25 17:15:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:13,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:13,692 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:13,692 INFO L350 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 87 treesize of output 57 [2022-11-25 17:15:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:13,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907963878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:13,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:13,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2022-11-25 17:15:13,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783855837] [2022-11-25 17:15:13,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:13,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:15:13,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:13,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:15:13,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:15:15,165 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 583 [2022-11-25 17:15:15,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 554 transitions, 11833 flow. Second operand has 21 states, 21 states have (on average 211.14285714285714) internal successors, (4434), 21 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:15,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:15,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 583 [2022-11-25 17:15:15,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:18,283 INFO L130 PetriNetUnfolder]: 2257/4614 cut-off events. [2022-11-25 17:15:18,283 INFO L131 PetriNetUnfolder]: For 114306/114306 co-relation queries the response was YES. [2022-11-25 17:15:18,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43425 conditions, 4614 events. 2257/4614 cut-off events. For 114306/114306 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 36647 event pairs, 258 based on Foata normal form. 38/4652 useless extension candidates. Maximal degree in co-relation 43294. Up to 2236 conditions per place. [2022-11-25 17:15:18,336 INFO L137 encePairwiseOnDemand]: 576/583 looper letters, 298 selfloop transitions, 319 changer transitions 0/617 dead transitions. [2022-11-25 17:15:18,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 617 transitions, 13607 flow [2022-11-25 17:15:18,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:15:18,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 17:15:18,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 4080 transitions. [2022-11-25 17:15:18,341 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36833077548072585 [2022-11-25 17:15:18,341 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 4080 transitions. [2022-11-25 17:15:18,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 4080 transitions. [2022-11-25 17:15:18,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:18,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 4080 transitions. [2022-11-25 17:15:18,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 214.73684210526315) internal successors, (4080), 19 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:18,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 583.0) internal successors, (11660), 20 states have internal predecessors, (11660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:18,351 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 583.0) internal successors, (11660), 20 states have internal predecessors, (11660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:18,351 INFO L175 Difference]: Start difference. First operand has 350 places, 554 transitions, 11833 flow. Second operand 19 states and 4080 transitions. [2022-11-25 17:15:18,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 617 transitions, 13607 flow [2022-11-25 17:15:19,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 617 transitions, 13276 flow, removed 71 selfloop flow, removed 12 redundant places. [2022-11-25 17:15:19,460 INFO L231 Difference]: Finished difference. Result has 352 places, 556 transitions, 12216 flow [2022-11-25 17:15:19,460 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=11278, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=12216, PETRI_PLACES=352, PETRI_TRANSITIONS=556} [2022-11-25 17:15:19,461 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 331 predicate places. [2022-11-25 17:15:19,461 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 556 transitions, 12216 flow [2022-11-25 17:15:19,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 211.14285714285714) internal successors, (4434), 21 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:19,462 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:19,462 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:19,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:19,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-25 17:15:19,663 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:15:19,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:19,663 INFO L85 PathProgramCache]: Analyzing trace with hash 64344085, now seen corresponding path program 26 times [2022-11-25 17:15:19,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:19,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811459513] [2022-11-25 17:15:19,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:19,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:20,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:20,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811459513] [2022-11-25 17:15:20,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811459513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:20,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353740597] [2022-11-25 17:15:20,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:15:20,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:20,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:20,189 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:20,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 17:15:20,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:15:20,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:20,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 17:15:20,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:20,691 INFO L350 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 93 treesize of output 61 [2022-11-25 17:15:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:20,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:20,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:20,877 INFO L350 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 125 treesize of output 73 [2022-11-25 17:15:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:21,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353740597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:21,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:21,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2022-11-25 17:15:21,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648809376] [2022-11-25 17:15:21,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:21,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:15:21,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:21,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:15:21,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:15:22,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 583 [2022-11-25 17:15:22,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 556 transitions, 12216 flow. Second operand has 21 states, 21 states have (on average 221.0952380952381) internal successors, (4643), 21 states have internal predecessors, (4643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:22,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:22,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 583 [2022-11-25 17:15:22,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:24,365 INFO L130 PetriNetUnfolder]: 2237/4560 cut-off events. [2022-11-25 17:15:24,365 INFO L131 PetriNetUnfolder]: For 116414/116414 co-relation queries the response was YES. [2022-11-25 17:15:24,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43884 conditions, 4560 events. 2237/4560 cut-off events. For 116414/116414 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 35898 event pairs, 768 based on Foata normal form. 10/4570 useless extension candidates. Maximal degree in co-relation 43756. Up to 4004 conditions per place. [2022-11-25 17:15:24,435 INFO L137 encePairwiseOnDemand]: 577/583 looper letters, 480 selfloop transitions, 97 changer transitions 5/582 dead transitions. [2022-11-25 17:15:24,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 582 transitions, 13561 flow [2022-11-25 17:15:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:15:24,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:15:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2685 transitions. [2022-11-25 17:15:24,440 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38379073756432247 [2022-11-25 17:15:24,441 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2685 transitions. [2022-11-25 17:15:24,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2685 transitions. [2022-11-25 17:15:24,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:24,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2685 transitions. [2022-11-25 17:15:24,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 223.75) internal successors, (2685), 12 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:24,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 583.0) internal successors, (7579), 13 states have internal predecessors, (7579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:24,456 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 583.0) internal successors, (7579), 13 states have internal predecessors, (7579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:24,456 INFO L175 Difference]: Start difference. First operand has 352 places, 556 transitions, 12216 flow. Second operand 12 states and 2685 transitions. [2022-11-25 17:15:24,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 582 transitions, 13561 flow [2022-11-25 17:15:25,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 582 transitions, 12908 flow, removed 80 selfloop flow, removed 10 redundant places. [2022-11-25 17:15:25,718 INFO L231 Difference]: Finished difference. Result has 353 places, 549 transitions, 11618 flow [2022-11-25 17:15:25,718 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=11492, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11618, PETRI_PLACES=353, PETRI_TRANSITIONS=549} [2022-11-25 17:15:25,719 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 332 predicate places. [2022-11-25 17:15:25,719 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 549 transitions, 11618 flow [2022-11-25 17:15:25,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 221.0952380952381) internal successors, (4643), 21 states have internal predecessors, (4643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:25,720 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:25,720 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:25,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:25,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:25,921 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:15:25,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:25,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1215907950, now seen corresponding path program 27 times [2022-11-25 17:15:25,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:25,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503163078] [2022-11-25 17:15:25,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:25,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:26,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:26,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503163078] [2022-11-25 17:15:26,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503163078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:26,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141712516] [2022-11-25 17:15:26,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:15:26,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:26,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:26,636 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:26,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 17:15:26,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:15:26,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:26,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 17:15:26,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:27,202 INFO L350 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 133 treesize of output 93 [2022-11-25 17:15:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:27,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:27,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:27,544 INFO L350 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 65 treesize of output 45 [2022-11-25 17:15:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:27,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141712516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:27,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:27,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-11-25 17:15:27,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740741612] [2022-11-25 17:15:27,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:27,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:15:27,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:27,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:15:27,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:15:28,419 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 583 [2022-11-25 17:15:28,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 549 transitions, 11618 flow. Second operand has 18 states, 18 states have (on average 222.94444444444446) internal successors, (4013), 18 states have internal predecessors, (4013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:28,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:28,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 583 [2022-11-25 17:15:28,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:30,800 INFO L130 PetriNetUnfolder]: 2193/4468 cut-off events. [2022-11-25 17:15:30,801 INFO L131 PetriNetUnfolder]: For 106719/106719 co-relation queries the response was YES. [2022-11-25 17:15:30,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42557 conditions, 4468 events. 2193/4468 cut-off events. For 106719/106719 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 35008 event pairs, 736 based on Foata normal form. 16/4484 useless extension candidates. Maximal degree in co-relation 42430. Up to 3878 conditions per place. [2022-11-25 17:15:30,871 INFO L137 encePairwiseOnDemand]: 577/583 looper letters, 469 selfloop transitions, 99 changer transitions 4/572 dead transitions. [2022-11-25 17:15:30,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 572 transitions, 12990 flow [2022-11-25 17:15:30,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:15:30,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 17:15:30,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2486 transitions. [2022-11-25 17:15:30,877 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3876500857632933 [2022-11-25 17:15:30,877 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2486 transitions. [2022-11-25 17:15:30,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2486 transitions. [2022-11-25 17:15:30,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:30,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2486 transitions. [2022-11-25 17:15:30,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:30,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 583.0) internal successors, (6996), 12 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:30,888 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 583.0) internal successors, (6996), 12 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:30,889 INFO L175 Difference]: Start difference. First operand has 353 places, 549 transitions, 11618 flow. Second operand 11 states and 2486 transitions. [2022-11-25 17:15:30,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 572 transitions, 12990 flow [2022-11-25 17:15:31,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 572 transitions, 12797 flow, removed 5 selfloop flow, removed 8 redundant places. [2022-11-25 17:15:31,991 INFO L231 Difference]: Finished difference. Result has 355 places, 548 transitions, 11648 flow [2022-11-25 17:15:31,992 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=11408, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11648, PETRI_PLACES=355, PETRI_TRANSITIONS=548} [2022-11-25 17:15:31,992 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 334 predicate places. [2022-11-25 17:15:31,992 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 548 transitions, 11648 flow [2022-11-25 17:15:31,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 222.94444444444446) internal successors, (4013), 18 states have internal predecessors, (4013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:31,993 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:31,994 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:31,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:32,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-25 17:15:32,195 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:15:32,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:32,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1153994530, now seen corresponding path program 28 times [2022-11-25 17:15:32,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:32,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320770755] [2022-11-25 17:15:32,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:32,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:32,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:32,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320770755] [2022-11-25 17:15:32,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320770755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:32,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467886246] [2022-11-25 17:15:32,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:15:32,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:32,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:32,728 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:32,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 17:15:32,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:15:32,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:32,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:15:32,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:33,200 INFO L350 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 17 treesize of output 9 [2022-11-25 17:15:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:33,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:33,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:33,470 INFO L350 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 44 treesize of output 30 [2022-11-25 17:15:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:33,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467886246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:33,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:33,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2022-11-25 17:15:33,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349786138] [2022-11-25 17:15:33,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:33,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:15:33,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:33,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:15:33,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:15:34,269 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 583 [2022-11-25 17:15:34,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 548 transitions, 11648 flow. Second operand has 17 states, 17 states have (on average 222.1764705882353) internal successors, (3777), 17 states have internal predecessors, (3777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:34,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:34,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 583 [2022-11-25 17:15:34,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:36,813 INFO L130 PetriNetUnfolder]: 2183/4406 cut-off events. [2022-11-25 17:15:36,813 INFO L131 PetriNetUnfolder]: For 102139/102139 co-relation queries the response was YES. [2022-11-25 17:15:36,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42414 conditions, 4406 events. 2183/4406 cut-off events. For 102139/102139 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 34151 event pairs, 40 based on Foata normal form. 12/4418 useless extension candidates. Maximal degree in co-relation 42286. Up to 1282 conditions per place. [2022-11-25 17:15:36,867 INFO L137 encePairwiseOnDemand]: 576/583 looper letters, 331 selfloop transitions, 278 changer transitions 0/609 dead transitions. [2022-11-25 17:15:36,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 609 transitions, 13651 flow [2022-11-25 17:15:36,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:15:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:15:36,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3374 transitions. [2022-11-25 17:15:36,871 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38582046883933674 [2022-11-25 17:15:36,871 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3374 transitions. [2022-11-25 17:15:36,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3374 transitions. [2022-11-25 17:15:36,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:36,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3374 transitions. [2022-11-25 17:15:36,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 224.93333333333334) internal successors, (3374), 15 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:36,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 583.0) internal successors, (9328), 16 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:36,880 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 583.0) internal successors, (9328), 16 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:36,880 INFO L175 Difference]: Start difference. First operand has 355 places, 548 transitions, 11648 flow. Second operand 15 states and 3374 transitions. [2022-11-25 17:15:36,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 609 transitions, 13651 flow [2022-11-25 17:15:37,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 609 transitions, 13388 flow, removed 28 selfloop flow, removed 12 redundant places. [2022-11-25 17:15:37,791 INFO L231 Difference]: Finished difference. Result has 354 places, 553 transitions, 12120 flow [2022-11-25 17:15:37,792 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=11271, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=12120, PETRI_PLACES=354, PETRI_TRANSITIONS=553} [2022-11-25 17:15:37,792 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 333 predicate places. [2022-11-25 17:15:37,792 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 553 transitions, 12120 flow [2022-11-25 17:15:37,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 222.1764705882353) internal successors, (3777), 17 states have internal predecessors, (3777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:37,793 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:37,793 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:37,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:37,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-25 17:15:37,994 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:15:37,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:37,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1111557466, now seen corresponding path program 29 times [2022-11-25 17:15:37,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:37,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823043217] [2022-11-25 17:15:37,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:37,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:38,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:38,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823043217] [2022-11-25 17:15:38,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823043217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:38,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131235009] [2022-11-25 17:15:38,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:15:38,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:38,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:38,430 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:38,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 17:15:38,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:15:38,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:38,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 17:15:38,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:38,808 INFO L350 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 112 treesize of output 72 [2022-11-25 17:15:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:38,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:39,076 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:39,076 INFO L350 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 62 treesize of output 42 [2022-11-25 17:15:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:39,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131235009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:39,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:39,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-11-25 17:15:39,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732388793] [2022-11-25 17:15:39,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:39,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:15:39,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:39,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:15:39,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:15:40,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 583 [2022-11-25 17:15:40,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 553 transitions, 12120 flow. Second operand has 18 states, 18 states have (on average 221.05555555555554) internal successors, (3979), 18 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:40,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:40,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 583 [2022-11-25 17:15:40,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:43,416 INFO L130 PetriNetUnfolder]: 2255/4586 cut-off events. [2022-11-25 17:15:43,416 INFO L131 PetriNetUnfolder]: For 112596/112596 co-relation queries the response was YES. [2022-11-25 17:15:43,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44804 conditions, 4586 events. 2255/4586 cut-off events. For 112596/112596 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 36022 event pairs, 310 based on Foata normal form. 8/4594 useless extension candidates. Maximal degree in co-relation 44680. Up to 1858 conditions per place. [2022-11-25 17:15:43,484 INFO L137 encePairwiseOnDemand]: 576/583 looper letters, 381 selfloop transitions, 222 changer transitions 0/603 dead transitions. [2022-11-25 17:15:43,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 603 transitions, 13928 flow [2022-11-25 17:15:43,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:15:43,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:15:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3365 transitions. [2022-11-25 17:15:43,489 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3847913093196112 [2022-11-25 17:15:43,489 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3365 transitions. [2022-11-25 17:15:43,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3365 transitions. [2022-11-25 17:15:43,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:43,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3365 transitions. [2022-11-25 17:15:43,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 224.33333333333334) internal successors, (3365), 15 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:43,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 583.0) internal successors, (9328), 16 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:43,504 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 583.0) internal successors, (9328), 16 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:43,504 INFO L175 Difference]: Start difference. First operand has 354 places, 553 transitions, 12120 flow. Second operand 15 states and 3365 transitions. [2022-11-25 17:15:43,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 603 transitions, 13928 flow [2022-11-25 17:15:44,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 603 transitions, 13427 flow, removed 10 selfloop flow, removed 10 redundant places. [2022-11-25 17:15:44,638 INFO L231 Difference]: Finished difference. Result has 359 places, 556 transitions, 12175 flow [2022-11-25 17:15:44,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=11638, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=12175, PETRI_PLACES=359, PETRI_TRANSITIONS=556} [2022-11-25 17:15:44,639 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 338 predicate places. [2022-11-25 17:15:44,639 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 556 transitions, 12175 flow [2022-11-25 17:15:44,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 221.05555555555554) internal successors, (3979), 18 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:44,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:44,640 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:44,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:44,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-25 17:15:44,841 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:15:44,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:44,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1609401171, now seen corresponding path program 30 times [2022-11-25 17:15:44,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:44,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007109619] [2022-11-25 17:15:44,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:44,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:45,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:45,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007109619] [2022-11-25 17:15:45,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007109619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:45,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309501384] [2022-11-25 17:15:45,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:15:45,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:45,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:45,305 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:45,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 17:15:45,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:15:45,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:45,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 17:15:45,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:45,743 INFO L350 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 112 treesize of output 80 [2022-11-25 17:15:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:45,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:46,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:46,019 INFO L350 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 125 treesize of output 73 [2022-11-25 17:15:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:46,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309501384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:46,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:46,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-11-25 17:15:46,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539366077] [2022-11-25 17:15:46,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:46,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:15:46,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:46,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:15:46,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:15:47,165 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 583 [2022-11-25 17:15:47,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 556 transitions, 12175 flow. Second operand has 18 states, 18 states have (on average 221.0) internal successors, (3978), 18 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:47,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:47,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 583 [2022-11-25 17:15:47,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:49,507 INFO L130 PetriNetUnfolder]: 2251/4564 cut-off events. [2022-11-25 17:15:49,507 INFO L131 PetriNetUnfolder]: For 114349/114349 co-relation queries the response was YES. [2022-11-25 17:15:49,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44622 conditions, 4564 events. 2251/4564 cut-off events. For 114349/114349 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 35708 event pairs, 800 based on Foata normal form. 4/4568 useless extension candidates. Maximal degree in co-relation 44498. Up to 4052 conditions per place. [2022-11-25 17:15:49,560 INFO L137 encePairwiseOnDemand]: 577/583 looper letters, 479 selfloop transitions, 95 changer transitions 2/576 dead transitions. [2022-11-25 17:15:49,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 576 transitions, 13480 flow [2022-11-25 17:15:49,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:15:49,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:15:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2238 transitions. [2022-11-25 17:15:49,563 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3838765008576329 [2022-11-25 17:15:49,564 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2238 transitions. [2022-11-25 17:15:49,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2238 transitions. [2022-11-25 17:15:49,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:49,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2238 transitions. [2022-11-25 17:15:49,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 223.8) internal successors, (2238), 10 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:49,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 583.0) internal successors, (6413), 11 states have internal predecessors, (6413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:49,571 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 583.0) internal successors, (6413), 11 states have internal predecessors, (6413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:49,572 INFO L175 Difference]: Start difference. First operand has 359 places, 556 transitions, 12175 flow. Second operand 10 states and 2238 transitions. [2022-11-25 17:15:49,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 576 transitions, 13480 flow [2022-11-25 17:15:50,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 576 transitions, 13154 flow, removed 20 selfloop flow, removed 12 redundant places. [2022-11-25 17:15:50,536 INFO L231 Difference]: Finished difference. Result has 355 places, 552 transitions, 11942 flow [2022-11-25 17:15:50,537 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=11775, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11942, PETRI_PLACES=355, PETRI_TRANSITIONS=552} [2022-11-25 17:15:50,538 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 334 predicate places. [2022-11-25 17:15:50,539 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 552 transitions, 11942 flow [2022-11-25 17:15:50,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 221.0) internal successors, (3978), 18 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:50,539 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:50,540 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:50,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:50,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-25 17:15:50,743 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:15:50,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:50,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1863029969, now seen corresponding path program 31 times [2022-11-25 17:15:50,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:50,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039319300] [2022-11-25 17:15:50,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:50,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:51,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:51,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039319300] [2022-11-25 17:15:51,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039319300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:51,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5836029] [2022-11-25 17:15:51,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:15:51,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:51,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:51,173 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:51,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-25 17:15:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:51,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:15:51,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:51,650 INFO L350 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 110 treesize of output 78 [2022-11-25 17:15:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:51,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:52,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:52,040 INFO L350 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 65 treesize of output 45 [2022-11-25 17:15:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:52,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5836029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:52,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:52,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2022-11-25 17:15:52,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379879242] [2022-11-25 17:15:52,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:52,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:15:52,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:52,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:15:52,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:15:53,436 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 583 [2022-11-25 17:15:53,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 552 transitions, 11942 flow. Second operand has 20 states, 20 states have (on average 221.15) internal successors, (4423), 20 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:53,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:53,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 583 [2022-11-25 17:15:53,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:55,954 INFO L130 PetriNetUnfolder]: 2259/4584 cut-off events. [2022-11-25 17:15:55,954 INFO L131 PetriNetUnfolder]: For 115836/115836 co-relation queries the response was YES. [2022-11-25 17:15:55,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44680 conditions, 4584 events. 2259/4584 cut-off events. For 115836/115836 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 35955 event pairs, 760 based on Foata normal form. 18/4602 useless extension candidates. Maximal degree in co-relation 44556. Up to 3868 conditions per place. [2022-11-25 17:15:56,018 INFO L137 encePairwiseOnDemand]: 577/583 looper letters, 498 selfloop transitions, 109 changer transitions 0/607 dead transitions. [2022-11-25 17:15:56,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 607 transitions, 13959 flow [2022-11-25 17:15:56,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:15:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:15:56,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2702 transitions. [2022-11-25 17:15:56,022 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3862206975414523 [2022-11-25 17:15:56,022 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2702 transitions. [2022-11-25 17:15:56,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2702 transitions. [2022-11-25 17:15:56,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:56,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2702 transitions. [2022-11-25 17:15:56,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 225.16666666666666) internal successors, (2702), 12 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:56,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 583.0) internal successors, (7579), 13 states have internal predecessors, (7579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:56,029 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 583.0) internal successors, (7579), 13 states have internal predecessors, (7579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:56,030 INFO L175 Difference]: Start difference. First operand has 355 places, 552 transitions, 11942 flow. Second operand 12 states and 2702 transitions. [2022-11-25 17:15:56,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 607 transitions, 13959 flow [2022-11-25 17:15:56,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 607 transitions, 13769 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-25 17:15:56,918 INFO L231 Difference]: Finished difference. Result has 359 places, 562 transitions, 12421 flow [2022-11-25 17:15:56,918 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=11663, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12421, PETRI_PLACES=359, PETRI_TRANSITIONS=562} [2022-11-25 17:15:56,918 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 338 predicate places. [2022-11-25 17:15:56,919 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 562 transitions, 12421 flow [2022-11-25 17:15:56,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 221.15) internal successors, (4423), 20 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:56,919 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:56,919 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:56,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:57,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:57,120 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:15:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:57,120 INFO L85 PathProgramCache]: Analyzing trace with hash -127971928, now seen corresponding path program 32 times [2022-11-25 17:15:57,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:57,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280683330] [2022-11-25 17:15:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:57,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:57,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:57,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280683330] [2022-11-25 17:15:57,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280683330] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:57,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398754622] [2022-11-25 17:15:57,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:15:57,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:57,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:57,559 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:57,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-25 17:15:57,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:15:57,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:57,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:15:57,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:58,046 INFO L350 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 17 treesize of output 9 [2022-11-25 17:15:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:58,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:58,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:58,303 INFO L350 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 62 treesize of output 42 [2022-11-25 17:15:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:15:58,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398754622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:58,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:58,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-11-25 17:15:58,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242950197] [2022-11-25 17:15:58,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:58,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:15:58,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:58,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:15:58,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:15:59,352 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 583 [2022-11-25 17:15:59,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 562 transitions, 12421 flow. Second operand has 16 states, 16 states have (on average 222.25) internal successors, (3556), 16 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:59,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:59,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 583 [2022-11-25 17:15:59,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:16:01,940 INFO L130 PetriNetUnfolder]: 2257/4558 cut-off events. [2022-11-25 17:16:01,940 INFO L131 PetriNetUnfolder]: For 114173/114173 co-relation queries the response was YES. [2022-11-25 17:16:01,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44938 conditions, 4558 events. 2257/4558 cut-off events. For 114173/114173 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 35516 event pairs, 290 based on Foata normal form. 12/4570 useless extension candidates. Maximal degree in co-relation 44810. Up to 1610 conditions per place. [2022-11-25 17:16:01,983 INFO L137 encePairwiseOnDemand]: 576/583 looper letters, 382 selfloop transitions, 218 changer transitions 0/600 dead transitions. [2022-11-25 17:16:01,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 600 transitions, 13981 flow [2022-11-25 17:16:01,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:16:01,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:16:01,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2929 transitions. [2022-11-25 17:16:01,986 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3864625940097638 [2022-11-25 17:16:01,987 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2929 transitions. [2022-11-25 17:16:01,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2929 transitions. [2022-11-25 17:16:01,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:16:01,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2929 transitions. [2022-11-25 17:16:01,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 225.30769230769232) internal successors, (2929), 13 states have internal predecessors, (2929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:01,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 583.0) internal successors, (8162), 14 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:01,993 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 583.0) internal successors, (8162), 14 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:01,993 INFO L175 Difference]: Start difference. First operand has 359 places, 562 transitions, 12421 flow. Second operand 13 states and 2929 transitions. [2022-11-25 17:16:01,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 600 transitions, 13981 flow [2022-11-25 17:16:02,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 600 transitions, 13629 flow, removed 130 selfloop flow, removed 6 redundant places. [2022-11-25 17:16:02,780 INFO L231 Difference]: Finished difference. Result has 364 places, 562 transitions, 12557 flow [2022-11-25 17:16:02,780 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=12053, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12557, PETRI_PLACES=364, PETRI_TRANSITIONS=562} [2022-11-25 17:16:02,781 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 343 predicate places. [2022-11-25 17:16:02,781 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 562 transitions, 12557 flow [2022-11-25 17:16:02,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 222.25) internal successors, (3556), 16 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:02,781 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:02,781 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:02,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:02,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-25 17:16:02,982 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:16:02,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:02,982 INFO L85 PathProgramCache]: Analyzing trace with hash 441841812, now seen corresponding path program 33 times [2022-11-25 17:16:02,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:02,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702497584] [2022-11-25 17:16:02,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:02,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:16:03,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:03,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702497584] [2022-11-25 17:16:03,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702497584] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:03,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636612812] [2022-11-25 17:16:03,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:16:03,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:03,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:03,576 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:03,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-25 17:16:03,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:16:03,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:03,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 17:16:03,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:04,184 INFO L350 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 93 treesize of output 61 [2022-11-25 17:16:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:16:04,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:04,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:16:04,380 INFO L350 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 125 treesize of output 73 [2022-11-25 17:16:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:16:04,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636612812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:04,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:04,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2022-11-25 17:16:04,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762432103] [2022-11-25 17:16:04,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:04,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:16:04,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:04,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:16:04,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:16:05,504 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 583 [2022-11-25 17:16:05,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 562 transitions, 12557 flow. Second operand has 19 states, 19 states have (on average 210.26315789473685) internal successors, (3995), 19 states have internal predecessors, (3995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:05,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:05,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 583 [2022-11-25 17:16:05,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:16:07,704 INFO L130 PetriNetUnfolder]: 2237/4518 cut-off events. [2022-11-25 17:16:07,704 INFO L131 PetriNetUnfolder]: For 114715/114715 co-relation queries the response was YES. [2022-11-25 17:16:07,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45118 conditions, 4518 events. 2237/4518 cut-off events. For 114715/114715 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 35160 event pairs, 786 based on Foata normal form. 8/4526 useless extension candidates. Maximal degree in co-relation 44988. Up to 3994 conditions per place. [2022-11-25 17:16:07,772 INFO L137 encePairwiseOnDemand]: 577/583 looper letters, 476 selfloop transitions, 93 changer transitions 8/577 dead transitions. [2022-11-25 17:16:07,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 577 transitions, 13802 flow [2022-11-25 17:16:07,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:16:07,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:16:07,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1915 transitions. [2022-11-25 17:16:07,776 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36497045931008193 [2022-11-25 17:16:07,776 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1915 transitions. [2022-11-25 17:16:07,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1915 transitions. [2022-11-25 17:16:07,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:16:07,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1915 transitions. [2022-11-25 17:16:07,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 212.77777777777777) internal successors, (1915), 9 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:07,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 583.0) internal successors, (5830), 10 states have internal predecessors, (5830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:07,781 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 583.0) internal successors, (5830), 10 states have internal predecessors, (5830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:07,782 INFO L175 Difference]: Start difference. First operand has 364 places, 562 transitions, 12557 flow. Second operand 9 states and 1915 transitions. [2022-11-25 17:16:07,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 577 transitions, 13802 flow [2022-11-25 17:16:08,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 577 transitions, 13553 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-11-25 17:16:08,730 INFO L231 Difference]: Finished difference. Result has 363 places, 558 transitions, 12420 flow [2022-11-25 17:16:08,731 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=12264, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12420, PETRI_PLACES=363, PETRI_TRANSITIONS=558} [2022-11-25 17:16:08,732 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 342 predicate places. [2022-11-25 17:16:08,732 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 558 transitions, 12420 flow [2022-11-25 17:16:08,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 210.26315789473685) internal successors, (3995), 19 states have internal predecessors, (3995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:08,733 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:08,733 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:08,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:08,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-25 17:16:08,933 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:16:08,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:08,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1687234829, now seen corresponding path program 34 times [2022-11-25 17:16:08,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:08,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396208875] [2022-11-25 17:16:08,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:08,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:16:09,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:09,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396208875] [2022-11-25 17:16:09,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396208875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:09,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312064961] [2022-11-25 17:16:09,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:16:09,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:09,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:09,428 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:09,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-25 17:16:09,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:16:09,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:09,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 17:16:09,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:09,915 INFO L350 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 17 treesize of output 9 [2022-11-25 17:16:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:16:09,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:10,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:16:10,178 INFO L350 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 62 treesize of output 42 [2022-11-25 17:16:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:16:10,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312064961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:10,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:10,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2022-11-25 17:16:10,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895935247] [2022-11-25 17:16:10,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:10,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:16:10,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:10,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:16:10,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:16:11,456 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 583 [2022-11-25 17:16:11,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 558 transitions, 12420 flow. Second operand has 21 states, 21 states have (on average 222.0952380952381) internal successors, (4664), 21 states have internal predecessors, (4664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:11,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:11,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 583 [2022-11-25 17:16:11,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:16:14,046 INFO L130 PetriNetUnfolder]: 2201/4390 cut-off events. [2022-11-25 17:16:14,046 INFO L131 PetriNetUnfolder]: For 110848/110848 co-relation queries the response was YES. [2022-11-25 17:16:14,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44129 conditions, 4390 events. 2201/4390 cut-off events. For 110848/110848 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 33549 event pairs, 290 based on Foata normal form. 32/4422 useless extension candidates. Maximal degree in co-relation 43998. Up to 2186 conditions per place. [2022-11-25 17:16:14,103 INFO L137 encePairwiseOnDemand]: 575/583 looper letters, 338 selfloop transitions, 275 changer transitions 0/613 dead transitions. [2022-11-25 17:16:14,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 613 transitions, 14153 flow [2022-11-25 17:16:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:16:14,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 17:16:14,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3832 transitions. [2022-11-25 17:16:14,107 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38664110584199374 [2022-11-25 17:16:14,107 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3832 transitions. [2022-11-25 17:16:14,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3832 transitions. [2022-11-25 17:16:14,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:16:14,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3832 transitions. [2022-11-25 17:16:14,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 225.41176470588235) internal successors, (3832), 17 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:14,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 583.0) internal successors, (10494), 18 states have internal predecessors, (10494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:14,121 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 583.0) internal successors, (10494), 18 states have internal predecessors, (10494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:14,121 INFO L175 Difference]: Start difference. First operand has 363 places, 558 transitions, 12420 flow. Second operand 17 states and 3832 transitions. [2022-11-25 17:16:14,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 613 transitions, 14153 flow [2022-11-25 17:16:15,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 613 transitions, 13957 flow, removed 5 selfloop flow, removed 8 redundant places. [2022-11-25 17:16:15,040 INFO L231 Difference]: Finished difference. Result has 365 places, 557 transitions, 12786 flow [2022-11-25 17:16:15,041 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=12040, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=12786, PETRI_PLACES=365, PETRI_TRANSITIONS=557} [2022-11-25 17:16:15,041 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 344 predicate places. [2022-11-25 17:16:15,041 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 557 transitions, 12786 flow [2022-11-25 17:16:15,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 222.0952380952381) internal successors, (4664), 21 states have internal predecessors, (4664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:15,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:15,042 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:15,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:15,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-25 17:16:15,243 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:16:15,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:15,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2085254944, now seen corresponding path program 35 times [2022-11-25 17:16:15,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:15,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681132856] [2022-11-25 17:16:15,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:15,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:16,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:16,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681132856] [2022-11-25 17:16:16,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681132856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:16,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191849336] [2022-11-25 17:16:16,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:16:16,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:16,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:16,025 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:16,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-25 17:16:16,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:16:16,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:16,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 17:16:16,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:16,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:16:16,370 INFO L350 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 52 treesize of output 48 [2022-11-25 17:16:16,584 INFO L350 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 61 treesize of output 37 [2022-11-25 17:16:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:16:16,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:16,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:16:16,928 INFO L350 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 137 treesize of output 91 [2022-11-25 17:16:16,936 INFO L350 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 19 treesize of output 15 [2022-11-25 17:16:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:16:17,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191849336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:17,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:17,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 27 [2022-11-25 17:16:17,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895875660] [2022-11-25 17:16:17,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:17,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:16:17,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:17,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:16:17,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=658, Unknown=1, NotChecked=0, Total=756 [2022-11-25 17:16:19,734 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 583 [2022-11-25 17:16:19,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 557 transitions, 12786 flow. Second operand has 28 states, 28 states have (on average 187.71428571428572) internal successors, (5256), 28 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:19,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:19,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 583 [2022-11-25 17:16:19,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:16:21,863 INFO L130 PetriNetUnfolder]: 2161/4310 cut-off events. [2022-11-25 17:16:21,863 INFO L131 PetriNetUnfolder]: For 118057/118057 co-relation queries the response was YES. [2022-11-25 17:16:21,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44636 conditions, 4310 events. 2161/4310 cut-off events. For 118057/118057 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 32790 event pairs, 704 based on Foata normal form. 16/4326 useless extension candidates. Maximal degree in co-relation 44506. Up to 3487 conditions per place. [2022-11-25 17:16:21,915 INFO L137 encePairwiseOnDemand]: 576/583 looper letters, 440 selfloop transitions, 119 changer transitions 14/573 dead transitions. [2022-11-25 17:16:21,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 573 transitions, 14013 flow [2022-11-25 17:16:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:16:21,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:16:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1725 transitions. [2022-11-25 17:16:21,918 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.328759291023442 [2022-11-25 17:16:21,918 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1725 transitions. [2022-11-25 17:16:21,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1725 transitions. [2022-11-25 17:16:21,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:16:21,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1725 transitions. [2022-11-25 17:16:21,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 191.66666666666666) internal successors, (1725), 9 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:21,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 583.0) internal successors, (5830), 10 states have internal predecessors, (5830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:21,922 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 583.0) internal successors, (5830), 10 states have internal predecessors, (5830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:21,922 INFO L175 Difference]: Start difference. First operand has 365 places, 557 transitions, 12786 flow. Second operand 9 states and 1725 transitions. [2022-11-25 17:16:21,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 573 transitions, 14013 flow [2022-11-25 17:16:22,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 573 transitions, 13610 flow, removed 37 selfloop flow, removed 13 redundant places. [2022-11-25 17:16:22,743 INFO L231 Difference]: Finished difference. Result has 360 places, 548 transitions, 12433 flow [2022-11-25 17:16:22,744 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=12351, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12433, PETRI_PLACES=360, PETRI_TRANSITIONS=548} [2022-11-25 17:16:22,744 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 339 predicate places. [2022-11-25 17:16:22,745 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 548 transitions, 12433 flow [2022-11-25 17:16:22,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 187.71428571428572) internal successors, (5256), 28 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:22,746 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:22,746 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:22,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-25 17:16:22,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-25 17:16:22,946 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:16:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:22,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1585727611, now seen corresponding path program 36 times [2022-11-25 17:16:22,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:22,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645417087] [2022-11-25 17:16:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:22,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:23,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:23,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645417087] [2022-11-25 17:16:23,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645417087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:23,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834596198] [2022-11-25 17:16:23,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:16:23,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:23,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:23,904 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:23,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-25 17:16:24,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:16:24,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:24,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 17:16:24,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:24,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:16:24,350 INFO L350 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 65 treesize of output 61 [2022-11-25 17:16:24,632 INFO L350 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 91 treesize of output 59 [2022-11-25 17:16:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:16:24,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:25,044 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:16:25,044 INFO L350 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 70 treesize of output 56 [2022-11-25 17:16:25,050 INFO L350 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 39 treesize of output 37 [2022-11-25 17:16:25,054 INFO L350 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 37 treesize of output 35 [2022-11-25 17:16:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:16:25,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834596198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:25,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:25,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 27 [2022-11-25 17:16:25,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317748119] [2022-11-25 17:16:25,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:25,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:16:25,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:25,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:16:25,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=660, Unknown=3, NotChecked=0, Total=756 [2022-11-25 17:16:26,065 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 583 [2022-11-25 17:16:26,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 548 transitions, 12433 flow. Second operand has 28 states, 28 states have (on average 187.53571428571428) internal successors, (5251), 28 states have internal predecessors, (5251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:26,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:26,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 583 [2022-11-25 17:16:26,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:16:30,025 INFO L130 PetriNetUnfolder]: 2153/4244 cut-off events. [2022-11-25 17:16:30,025 INFO L131 PetriNetUnfolder]: For 111893/111893 co-relation queries the response was YES. [2022-11-25 17:16:30,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43494 conditions, 4244 events. 2153/4244 cut-off events. For 111893/111893 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 31964 event pairs, 110 based on Foata normal form. 18/4262 useless extension candidates. Maximal degree in co-relation 43400. Up to 1772 conditions per place. [2022-11-25 17:16:30,091 INFO L137 encePairwiseOnDemand]: 576/583 looper letters, 342 selfloop transitions, 278 changer transitions 0/620 dead transitions. [2022-11-25 17:16:30,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 620 transitions, 14499 flow [2022-11-25 17:16:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 17:16:30,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 17:16:30,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3826 transitions. [2022-11-25 17:16:30,097 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3281303602058319 [2022-11-25 17:16:30,097 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3826 transitions. [2022-11-25 17:16:30,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3826 transitions. [2022-11-25 17:16:30,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:16:30,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3826 transitions. [2022-11-25 17:16:30,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 191.3) internal successors, (3826), 20 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:30,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 583.0) internal successors, (12243), 21 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:30,108 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 583.0) internal successors, (12243), 21 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:30,108 INFO L175 Difference]: Start difference. First operand has 360 places, 548 transitions, 12433 flow. Second operand 20 states and 3826 transitions. [2022-11-25 17:16:30,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 620 transitions, 14499 flow [2022-11-25 17:16:31,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 620 transitions, 13922 flow, removed 6 selfloop flow, removed 14 redundant places. [2022-11-25 17:16:31,046 INFO L231 Difference]: Finished difference. Result has 364 places, 552 transitions, 12661 flow [2022-11-25 17:16:31,047 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=11654, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12661, PETRI_PLACES=364, PETRI_TRANSITIONS=552} [2022-11-25 17:16:31,047 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 343 predicate places. [2022-11-25 17:16:31,047 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 552 transitions, 12661 flow [2022-11-25 17:16:31,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 187.53571428571428) internal successors, (5251), 28 states have internal predecessors, (5251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:31,048 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:31,048 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:31,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:31,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:31,249 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:16:31,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:31,251 INFO L85 PathProgramCache]: Analyzing trace with hash 501365268, now seen corresponding path program 37 times [2022-11-25 17:16:31,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:31,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337687014] [2022-11-25 17:16:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:31,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:31,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:16:31,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:31,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337687014] [2022-11-25 17:16:31,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337687014] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:31,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080917929] [2022-11-25 17:16:31,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:16:31,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:31,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:31,789 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:31,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-25 17:16:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:31,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 17:16:31,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:32,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:16:32,168 INFO L350 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 52 treesize of output 48 [2022-11-25 17:16:32,448 INFO L350 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 82 treesize of output 50 [2022-11-25 17:16:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:16:32,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:32,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:16:32,784 INFO L350 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 107 treesize of output 77 [2022-11-25 17:16:32,788 INFO L350 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 19 treesize of output 15 [2022-11-25 17:16:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:16:32,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080917929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:32,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:32,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-11-25 17:16:32,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120112948] [2022-11-25 17:16:32,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:32,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:16:32,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:32,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:16:32,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=543, Unknown=1, NotChecked=0, Total=650 [2022-11-25 17:16:34,266 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 583 [2022-11-25 17:16:34,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 552 transitions, 12661 flow. Second operand has 26 states, 26 states have (on average 195.84615384615384) internal successors, (5092), 26 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:34,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:34,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 583 [2022-11-25 17:16:34,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:16:36,908 INFO L130 PetriNetUnfolder]: 2133/4204 cut-off events. [2022-11-25 17:16:36,909 INFO L131 PetriNetUnfolder]: For 106931/106931 co-relation queries the response was YES. [2022-11-25 17:16:36,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44303 conditions, 4204 events. 2133/4204 cut-off events. For 106931/106931 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 31513 event pairs, 412 based on Foata normal form. 8/4212 useless extension candidates. Maximal degree in co-relation 44214. Up to 2398 conditions per place. [2022-11-25 17:16:36,998 INFO L137 encePairwiseOnDemand]: 577/583 looper letters, 380 selfloop transitions, 187 changer transitions 8/575 dead transitions. [2022-11-25 17:16:36,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 575 transitions, 13992 flow [2022-11-25 17:16:36,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:16:36,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:16:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2393 transitions. [2022-11-25 17:16:37,002 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34205260148656375 [2022-11-25 17:16:37,002 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2393 transitions. [2022-11-25 17:16:37,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2393 transitions. [2022-11-25 17:16:37,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:16:37,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2393 transitions. [2022-11-25 17:16:37,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 199.41666666666666) internal successors, (2393), 12 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:37,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 583.0) internal successors, (7579), 13 states have internal predecessors, (7579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:37,012 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 583.0) internal successors, (7579), 13 states have internal predecessors, (7579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:37,012 INFO L175 Difference]: Start difference. First operand has 364 places, 552 transitions, 12661 flow. Second operand 12 states and 2393 transitions. [2022-11-25 17:16:37,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 575 transitions, 13992 flow [2022-11-25 17:16:37,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 575 transitions, 13610 flow, removed 55 selfloop flow, removed 13 redundant places. [2022-11-25 17:16:37,904 INFO L231 Difference]: Finished difference. Result has 362 places, 548 transitions, 12563 flow [2022-11-25 17:16:37,905 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=12230, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12563, PETRI_PLACES=362, PETRI_TRANSITIONS=548} [2022-11-25 17:16:37,905 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 341 predicate places. [2022-11-25 17:16:37,906 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 548 transitions, 12563 flow [2022-11-25 17:16:37,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 195.84615384615384) internal successors, (5092), 26 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:37,907 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:37,907 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:37,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:38,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:38,113 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:16:38,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:38,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1835586946, now seen corresponding path program 38 times [2022-11-25 17:16:38,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:38,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173125457] [2022-11-25 17:16:38,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:38,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:39,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:39,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173125457] [2022-11-25 17:16:39,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173125457] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:39,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016905858] [2022-11-25 17:16:39,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:16:39,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:39,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:39,376 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:39,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-25 17:16:39,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:16:39,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:39,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-25 17:16:39,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:40,156 INFO L350 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 157 treesize of output 101 [2022-11-25 17:16:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:16:40,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:41,642 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-25 17:16:41,643 INFO L350 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 141 treesize of output 90 [2022-11-25 17:16:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:16:41,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016905858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:41,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:41,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 32 [2022-11-25 17:16:41,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832068039] [2022-11-25 17:16:41,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:41,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 17:16:41,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:41,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 17:16:41,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 17:16:46,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 583 [2022-11-25 17:16:46,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 548 transitions, 12563 flow. Second operand has 33 states, 33 states have (on average 200.6969696969697) internal successors, (6623), 33 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:46,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:46,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 583 [2022-11-25 17:16:46,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:16:58,446 INFO L130 PetriNetUnfolder]: 3811/7816 cut-off events. [2022-11-25 17:16:58,446 INFO L131 PetriNetUnfolder]: For 189895/189895 co-relation queries the response was YES. [2022-11-25 17:16:58,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78228 conditions, 7816 events. 3811/7816 cut-off events. For 189895/189895 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 66843 event pairs, 232 based on Foata normal form. 72/7888 useless extension candidates. Maximal degree in co-relation 78140. Up to 1829 conditions per place. [2022-11-25 17:16:58,585 INFO L137 encePairwiseOnDemand]: 574/583 looper letters, 502 selfloop transitions, 407 changer transitions 29/938 dead transitions. [2022-11-25 17:16:58,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 938 transitions, 21722 flow [2022-11-25 17:16:58,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-25 17:16:58,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-25 17:16:58,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 8990 transitions. [2022-11-25 17:16:58,596 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3504600031186652 [2022-11-25 17:16:58,596 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 8990 transitions. [2022-11-25 17:16:58,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 8990 transitions. [2022-11-25 17:16:58,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:16:58,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 8990 transitions. [2022-11-25 17:16:58,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 204.3181818181818) internal successors, (8990), 44 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:58,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 583.0) internal successors, (26235), 45 states have internal predecessors, (26235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:58,620 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 583.0) internal successors, (26235), 45 states have internal predecessors, (26235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:58,621 INFO L175 Difference]: Start difference. First operand has 362 places, 548 transitions, 12563 flow. Second operand 44 states and 8990 transitions. [2022-11-25 17:16:58,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 938 transitions, 21722 flow [2022-11-25 17:17:00,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 938 transitions, 21471 flow, removed 12 selfloop flow, removed 10 redundant places. [2022-11-25 17:17:00,153 INFO L231 Difference]: Finished difference. Result has 400 places, 685 transitions, 16500 flow [2022-11-25 17:17:00,154 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=12332, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16500, PETRI_PLACES=400, PETRI_TRANSITIONS=685} [2022-11-25 17:17:00,154 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 379 predicate places. [2022-11-25 17:17:00,154 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 685 transitions, 16500 flow [2022-11-25 17:17:00,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 200.6969696969697) internal successors, (6623), 33 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:00,155 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:17:00,155 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:00,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:00,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:00,357 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:17:00,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:00,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1837487822, now seen corresponding path program 39 times [2022-11-25 17:17:00,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:00,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849561912] [2022-11-25 17:17:00,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:00,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:17:01,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:01,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849561912] [2022-11-25 17:17:01,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849561912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:01,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832659036] [2022-11-25 17:17:01,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:17:01,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:01,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:01,730 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:01,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-25 17:17:01,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:17:01,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:01,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-25 17:17:01,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:03,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:17:03,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 134 [2022-11-25 17:17:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:17:03,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:06,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:17:06,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 259 treesize of output 173 [2022-11-25 17:17:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:17:07,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832659036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:07,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:07,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-11-25 17:17:07,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172750008] [2022-11-25 17:17:07,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:07,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:17:07,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:07,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:17:07,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-11-25 17:17:11,466 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 583 [2022-11-25 17:17:11,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 685 transitions, 16500 flow. Second operand has 26 states, 26 states have (on average 208.80769230769232) internal successors, (5429), 26 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:11,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:17:11,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 583 [2022-11-25 17:17:11,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:17:27,997 INFO L130 PetriNetUnfolder]: 4009/8078 cut-off events. [2022-11-25 17:17:27,998 INFO L131 PetriNetUnfolder]: For 209937/209937 co-relation queries the response was YES. [2022-11-25 17:17:28,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86132 conditions, 8078 events. 4009/8078 cut-off events. For 209937/209937 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 68500 event pairs, 1130 based on Foata normal form. 12/8090 useless extension candidates. Maximal degree in co-relation 86037. Up to 5274 conditions per place. [2022-11-25 17:17:28,107 INFO L137 encePairwiseOnDemand]: 574/583 looper letters, 586 selfloop transitions, 275 changer transitions 15/876 dead transitions. [2022-11-25 17:17:28,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 876 transitions, 21488 flow [2022-11-25 17:17:28,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 17:17:28,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-25 17:17:28,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 6597 transitions. [2022-11-25 17:17:28,116 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36501964256072594 [2022-11-25 17:17:28,116 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 6597 transitions. [2022-11-25 17:17:28,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 6597 transitions. [2022-11-25 17:17:28,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:17:28,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 6597 transitions. [2022-11-25 17:17:28,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 212.80645161290323) internal successors, (6597), 31 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:28,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 583.0) internal successors, (18656), 32 states have internal predecessors, (18656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:28,134 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 583.0) internal successors, (18656), 32 states have internal predecessors, (18656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:28,134 INFO L175 Difference]: Start difference. First operand has 400 places, 685 transitions, 16500 flow. Second operand 31 states and 6597 transitions. [2022-11-25 17:17:28,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 876 transitions, 21488 flow [2022-11-25 17:17:30,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 876 transitions, 19980 flow, removed 605 selfloop flow, removed 15 redundant places. [2022-11-25 17:17:30,071 INFO L231 Difference]: Finished difference. Result has 426 places, 768 transitions, 18065 flow [2022-11-25 17:17:30,072 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=15285, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=18065, PETRI_PLACES=426, PETRI_TRANSITIONS=768} [2022-11-25 17:17:30,072 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 405 predicate places. [2022-11-25 17:17:30,072 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 768 transitions, 18065 flow [2022-11-25 17:17:30,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 208.80769230769232) internal successors, (5429), 26 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:30,073 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:17:30,073 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:30,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:30,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:30,274 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:17:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:30,274 INFO L85 PathProgramCache]: Analyzing trace with hash 98287876, now seen corresponding path program 40 times [2022-11-25 17:17:30,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:30,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193829609] [2022-11-25 17:17:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:30,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:17:31,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:31,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193829609] [2022-11-25 17:17:31,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193829609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:31,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912393297] [2022-11-25 17:17:31,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:17:31,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:31,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:31,184 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:31,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-25 17:17:31,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:17:31,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:31,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 17:17:31,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:31,734 INFO L350 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 203 treesize of output 113 [2022-11-25 17:17:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:17:32,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:33,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:17:33,943 INFO L350 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 331 treesize of output 223 [2022-11-25 17:17:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:17:34,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912393297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:34,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:34,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2022-11-25 17:17:34,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455386761] [2022-11-25 17:17:34,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:34,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 17:17:34,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:34,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 17:17:34,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-11-25 17:17:36,747 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 583 [2022-11-25 17:17:36,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 768 transitions, 18065 flow. Second operand has 27 states, 27 states have (on average 208.85185185185185) internal successors, (5639), 27 states have internal predecessors, (5639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:36,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:17:36,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 583 [2022-11-25 17:17:36,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:17:54,085 INFO L130 PetriNetUnfolder]: 5387/10632 cut-off events. [2022-11-25 17:17:54,085 INFO L131 PetriNetUnfolder]: For 299405/299405 co-relation queries the response was YES. [2022-11-25 17:17:54,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104507 conditions, 10632 events. 5387/10632 cut-off events. For 299405/299405 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 93039 event pairs, 470 based on Foata normal form. 116/10748 useless extension candidates. Maximal degree in co-relation 104402. Up to 3528 conditions per place. [2022-11-25 17:17:54,299 INFO L137 encePairwiseOnDemand]: 575/583 looper letters, 693 selfloop transitions, 544 changer transitions 37/1274 dead transitions. [2022-11-25 17:17:54,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 1274 transitions, 30071 flow [2022-11-25 17:17:54,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-25 17:17:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-11-25 17:17:54,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 11287 transitions. [2022-11-25 17:17:54,311 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3652869024887537 [2022-11-25 17:17:54,311 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 11287 transitions. [2022-11-25 17:17:54,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 11287 transitions. [2022-11-25 17:17:54,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:17:54,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 11287 transitions. [2022-11-25 17:17:54,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 212.96226415094338) internal successors, (11287), 53 states have internal predecessors, (11287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:54,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 583.0) internal successors, (31482), 54 states have internal predecessors, (31482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:54,340 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 583.0) internal successors, (31482), 54 states have internal predecessors, (31482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:54,340 INFO L175 Difference]: Start difference. First operand has 426 places, 768 transitions, 18065 flow. Second operand 53 states and 11287 transitions. [2022-11-25 17:17:54,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 1274 transitions, 30071 flow [2022-11-25 17:17:57,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 1274 transitions, 29277 flow, removed 315 selfloop flow, removed 7 redundant places. [2022-11-25 17:17:57,392 INFO L231 Difference]: Finished difference. Result has 486 places, 951 transitions, 23321 flow [2022-11-25 17:17:57,393 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=17353, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=23321, PETRI_PLACES=486, PETRI_TRANSITIONS=951} [2022-11-25 17:17:57,393 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 465 predicate places. [2022-11-25 17:17:57,394 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 951 transitions, 23321 flow [2022-11-25 17:17:57,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 208.85185185185185) internal successors, (5639), 27 states have internal predecessors, (5639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:57,395 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:17:57,395 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:57,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:57,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:57,600 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:17:57,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:57,601 INFO L85 PathProgramCache]: Analyzing trace with hash 337187204, now seen corresponding path program 41 times [2022-11-25 17:17:57,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:57,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371149884] [2022-11-25 17:17:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:57,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:17:58,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:58,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371149884] [2022-11-25 17:17:58,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371149884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:58,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123785144] [2022-11-25 17:17:58,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:17:58,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:58,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:58,557 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:58,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-25 17:17:58,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:17:58,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:58,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 17:17:58,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:59,018 INFO L350 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 228 treesize of output 126 [2022-11-25 17:17:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:17:59,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:01,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:18:01,019 INFO L350 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 273 treesize of output 189 [2022-11-25 17:18:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:18:01,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123785144] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:01,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:01,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2022-11-25 17:18:01,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018900182] [2022-11-25 17:18:01,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:01,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 17:18:01,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:01,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 17:18:01,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2022-11-25 17:18:04,105 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 583 [2022-11-25 17:18:04,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 951 transitions, 23321 flow. Second operand has 27 states, 27 states have (on average 208.77777777777777) internal successors, (5637), 27 states have internal predecessors, (5637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:04,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:04,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 583 [2022-11-25 17:18:04,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:15,167 INFO L130 PetriNetUnfolder]: 5631/11300 cut-off events. [2022-11-25 17:18:15,168 INFO L131 PetriNetUnfolder]: For 342944/342944 co-relation queries the response was YES. [2022-11-25 17:18:15,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115454 conditions, 11300 events. 5631/11300 cut-off events. For 342944/342944 co-relation queries the response was YES. Maximal size of possible extension queue 860. Compared 101433 event pairs, 770 based on Foata normal form. 64/11364 useless extension candidates. Maximal degree in co-relation 115335. Up to 4492 conditions per place. [2022-11-25 17:18:15,348 INFO L137 encePairwiseOnDemand]: 575/583 looper letters, 713 selfloop transitions, 490 changer transitions 29/1232 dead transitions. [2022-11-25 17:18:15,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 1232 transitions, 31650 flow [2022-11-25 17:18:15,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 17:18:15,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-25 17:18:15,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5952 transitions. [2022-11-25 17:18:15,355 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3646165155599118 [2022-11-25 17:18:15,356 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5952 transitions. [2022-11-25 17:18:15,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5952 transitions. [2022-11-25 17:18:15,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:15,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5952 transitions. [2022-11-25 17:18:15,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 212.57142857142858) internal successors, (5952), 28 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:15,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 583.0) internal successors, (16907), 29 states have internal predecessors, (16907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:15,372 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 583.0) internal successors, (16907), 29 states have internal predecessors, (16907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:15,372 INFO L175 Difference]: Start difference. First operand has 486 places, 951 transitions, 23321 flow. Second operand 28 states and 5952 transitions. [2022-11-25 17:18:15,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 1232 transitions, 31650 flow [2022-11-25 17:18:19,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 1232 transitions, 28949 flow, removed 1017 selfloop flow, removed 26 redundant places. [2022-11-25 17:18:19,577 INFO L231 Difference]: Finished difference. Result has 495 places, 1017 transitions, 23913 flow [2022-11-25 17:18:19,578 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=21077, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=951, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=419, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=23913, PETRI_PLACES=495, PETRI_TRANSITIONS=1017} [2022-11-25 17:18:19,578 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 474 predicate places. [2022-11-25 17:18:19,579 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 1017 transitions, 23913 flow [2022-11-25 17:18:19,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 208.77777777777777) internal successors, (5637), 27 states have internal predecessors, (5637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:19,580 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:19,580 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:19,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:19,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:19,787 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:18:19,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:19,787 INFO L85 PathProgramCache]: Analyzing trace with hash 927076036, now seen corresponding path program 42 times [2022-11-25 17:18:19,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:19,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137357802] [2022-11-25 17:18:19,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:19,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:20,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:20,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137357802] [2022-11-25 17:18:20,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137357802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:20,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193302999] [2022-11-25 17:18:20,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:18:20,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:20,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:20,906 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:20,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-25 17:18:21,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:18:21,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:18:21,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-25 17:18:21,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:21,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:18:21,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 139 [2022-11-25 17:18:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:18:22,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:26,493 INFO L321 Elim1Store]: treesize reduction 15, result has 65.1 percent of original size [2022-11-25 17:18:26,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 336 treesize of output 200 [2022-11-25 17:18:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:18:26,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193302999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:26,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:26,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2022-11-25 17:18:26,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987488432] [2022-11-25 17:18:26,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:26,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 17:18:26,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:26,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 17:18:26,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-11-25 17:18:31,983 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 583 [2022-11-25 17:18:31,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 1017 transitions, 23913 flow. Second operand has 32 states, 32 states have (on average 199.71875) internal successors, (6391), 32 states have internal predecessors, (6391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:31,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:31,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 583 [2022-11-25 17:18:31,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:19,033 INFO L130 PetriNetUnfolder]: 7007/13862 cut-off events. [2022-11-25 17:19:19,033 INFO L131 PetriNetUnfolder]: For 448663/448663 co-relation queries the response was YES. [2022-11-25 17:19:19,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138588 conditions, 13862 events. 7007/13862 cut-off events. For 448663/448663 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 127019 event pairs, 288 based on Foata normal form. 48/13910 useless extension candidates. Maximal degree in co-relation 138467. Up to 3330 conditions per place. [2022-11-25 17:19:19,353 INFO L137 encePairwiseOnDemand]: 574/583 looper letters, 510 selfloop transitions, 920 changer transitions 30/1460 dead transitions. [2022-11-25 17:19:19,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 1460 transitions, 35437 flow [2022-11-25 17:19:19,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-25 17:19:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-25 17:19:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 14568 transitions. [2022-11-25 17:19:19,362 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34705546026300743 [2022-11-25 17:19:19,362 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 14568 transitions. [2022-11-25 17:19:19,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 14568 transitions. [2022-11-25 17:19:19,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:19,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 14568 transitions. [2022-11-25 17:19:19,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 202.33333333333334) internal successors, (14568), 72 states have internal predecessors, (14568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:19,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 583.0) internal successors, (42559), 73 states have internal predecessors, (42559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:19,396 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 583.0) internal successors, (42559), 73 states have internal predecessors, (42559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:19,397 INFO L175 Difference]: Start difference. First operand has 495 places, 1017 transitions, 23913 flow. Second operand 72 states and 14568 transitions. [2022-11-25 17:19:19,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 1460 transitions, 35437 flow [2022-11-25 17:19:24,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 1460 transitions, 34935 flow, removed 128 selfloop flow, removed 12 redundant places. [2022-11-25 17:19:24,480 INFO L231 Difference]: Finished difference. Result has 564 places, 1270 transitions, 32338 flow [2022-11-25 17:19:24,481 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=23391, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=674, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=32338, PETRI_PLACES=564, PETRI_TRANSITIONS=1270} [2022-11-25 17:19:24,481 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 543 predicate places. [2022-11-25 17:19:24,481 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 1270 transitions, 32338 flow [2022-11-25 17:19:24,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 199.71875) internal successors, (6391), 32 states have internal predecessors, (6391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:24,482 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:24,482 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:24,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:24,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-25 17:19:24,683 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:19:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:24,683 INFO L85 PathProgramCache]: Analyzing trace with hash 279098988, now seen corresponding path program 43 times [2022-11-25 17:19:24,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:24,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29691315] [2022-11-25 17:19:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:24,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:26,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:26,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29691315] [2022-11-25 17:19:26,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29691315] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:26,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103746736] [2022-11-25 17:19:26,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:19:26,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:26,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:26,060 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:26,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-25 17:19:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:26,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 17:19:26,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:26,700 INFO L350 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 203 treesize of output 113 [2022-11-25 17:19:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:19:26,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:28,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:28,933 INFO L350 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 362 treesize of output 242 [2022-11-25 17:19:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:19:29,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103746736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:29,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:29,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2022-11-25 17:19:29,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023543387] [2022-11-25 17:19:29,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:29,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 17:19:29,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:29,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 17:19:29,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2022-11-25 17:19:33,877 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 583 [2022-11-25 17:19:33,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 1270 transitions, 32338 flow. Second operand has 32 states, 32 states have (on average 199.65625) internal successors, (6389), 32 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:33,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:33,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 583 [2022-11-25 17:19:33,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:01,510 INFO L130 PetriNetUnfolder]: 8311/16352 cut-off events. [2022-11-25 17:20:01,510 INFO L131 PetriNetUnfolder]: For 589567/589567 co-relation queries the response was YES. [2022-11-25 17:20:01,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176256 conditions, 16352 events. 8311/16352 cut-off events. For 589567/589567 co-relation queries the response was YES. Maximal size of possible extension queue 1259. Compared 152549 event pairs, 2062 based on Foata normal form. 74/16426 useless extension candidates. Maximal degree in co-relation 176126. Up to 9295 conditions per place. [2022-11-25 17:20:01,968 INFO L137 encePairwiseOnDemand]: 574/583 looper letters, 1242 selfloop transitions, 488 changer transitions 64/1794 dead transitions. [2022-11-25 17:20:01,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 1794 transitions, 49413 flow [2022-11-25 17:20:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-25 17:20:01,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-11-25 17:20:01,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 10770 transitions. [2022-11-25 17:20:01,980 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34855496941648595 [2022-11-25 17:20:01,980 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 10770 transitions. [2022-11-25 17:20:01,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 10770 transitions. [2022-11-25 17:20:01,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:01,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 10770 transitions. [2022-11-25 17:20:01,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 203.20754716981133) internal successors, (10770), 53 states have internal predecessors, (10770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:02,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 583.0) internal successors, (31482), 54 states have internal predecessors, (31482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:02,008 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 583.0) internal successors, (31482), 54 states have internal predecessors, (31482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:02,008 INFO L175 Difference]: Start difference. First operand has 564 places, 1270 transitions, 32338 flow. Second operand 53 states and 10770 transitions. [2022-11-25 17:20:02,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 1794 transitions, 49413 flow [2022-11-25 17:20:11,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 588 places, 1794 transitions, 46317 flow, removed 1175 selfloop flow, removed 23 redundant places. [2022-11-25 17:20:11,259 INFO L231 Difference]: Finished difference. Result has 610 places, 1580 transitions, 40680 flow [2022-11-25 17:20:11,260 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=30132, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1000, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=40680, PETRI_PLACES=610, PETRI_TRANSITIONS=1580} [2022-11-25 17:20:11,261 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 589 predicate places. [2022-11-25 17:20:11,261 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 1580 transitions, 40680 flow [2022-11-25 17:20:11,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 199.65625) internal successors, (6389), 32 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:11,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:11,262 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:11,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:11,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-25 17:20:11,469 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:11,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:11,469 INFO L85 PathProgramCache]: Analyzing trace with hash 644301182, now seen corresponding path program 44 times [2022-11-25 17:20:11,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:11,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901124468] [2022-11-25 17:20:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:11,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:12,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:12,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901124468] [2022-11-25 17:20:12,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901124468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:12,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972809036] [2022-11-25 17:20:12,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:20:12,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:12,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:12,911 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:12,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658b8652-49ec-4bc5-b215-964ea0e40e31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-25 17:20:13,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:20:13,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:13,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-25 17:20:13,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:14,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:14,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 130 [2022-11-25 17:20:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:20:14,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:17,914 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:17,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 328 treesize of output 224 [2022-11-25 17:20:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:20:18,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972809036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:18,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:18,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 32 [2022-11-25 17:20:18,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048157497] [2022-11-25 17:20:18,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:18,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 17:20:18,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:18,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 17:20:18,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 17:20:23,162 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 583 [2022-11-25 17:20:23,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 1580 transitions, 40680 flow. Second operand has 33 states, 33 states have (on average 199.75757575757575) internal successors, (6592), 33 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:23,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:23,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 583 [2022-11-25 17:20:23,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand