./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8 --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 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 --- 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-2329fc7 [2022-12-13 19:33:12,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:33:12,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:33:13,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:33:13,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:33:13,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:33:13,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:33:13,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:33:13,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:33:13,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:33:13,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:33:13,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:33:13,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:33:13,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:33:13,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:33:13,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:33:13,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:33:13,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:33:13,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:33:13,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:33:13,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:33:13,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:33:13,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:33:13,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:33:13,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:33:13,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:33:13,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:33:13,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:33:13,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:33:13,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:33:13,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:33:13,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:33:13,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:33:13,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:33:13,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:33:13,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:33:13,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:33:13,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:33:13,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:33:13,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:33:13,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:33:13,048 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 19:33:13,070 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:33:13,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:33:13,071 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:33:13,071 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:33:13,072 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:33:13,072 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:33:13,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:33:13,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:33:13,073 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:33:13,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:33:13,073 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:33:13,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:33:13,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:33:13,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:33:13,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 19:33:13,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:33:13,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 19:33:13,074 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:33:13,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 19:33:13,075 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:33:13,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 19:33:13,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:33:13,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:33:13,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:33:13,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:33:13,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:33:13,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:33:13,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 19:33:13,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:33:13,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:33:13,077 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:33:13,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 19:33:13,077 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:33:13,077 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:33:13,078 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:33:13,078 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_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 [2022-12-13 19:33:13,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:33:13,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:33:13,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:33:13,288 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:33:13,288 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:33:13,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2022-12-13 19:33:15,813 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:33:15,970 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:33:15,971 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2022-12-13 19:33:15,976 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/data/c44653e7f/b236021d484149069ca53471b4b28827/FLAG1cfde3c9e [2022-12-13 19:33:16,386 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/data/c44653e7f/b236021d484149069ca53471b4b28827 [2022-12-13 19:33:16,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:33:16,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:33:16,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:33:16,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:33:16,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:33:16,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:33:16" (1/1) ... [2022-12-13 19:33:16,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c89cd6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:33:16, skipping insertion in model container [2022-12-13 19:33:16,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:33:16" (1/1) ... [2022-12-13 19:33:16,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:33:16,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:33:16,563 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_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3345,3358] [2022-12-13 19:33:16,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:33:16,581 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:33:16,600 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_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3345,3358] [2022-12-13 19:33:16,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:33:16,612 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:33:16,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:33:16 WrapperNode [2022-12-13 19:33:16,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:33:16,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:33:16,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:33:16,613 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:33:16,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:33:16" (1/1) ... [2022-12-13 19:33:16,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:33:16" (1/1) ... [2022-12-13 19:33:16,640 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 176 [2022-12-13 19:33:16,640 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:33:16,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:33:16,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:33:16,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:33:16,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:33:16" (1/1) ... [2022-12-13 19:33:16,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:33:16" (1/1) ... [2022-12-13 19:33:16,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:33:16" (1/1) ... [2022-12-13 19:33:16,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:33:16" (1/1) ... [2022-12-13 19:33:16,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:33:16" (1/1) ... [2022-12-13 19:33:16,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:33:16" (1/1) ... [2022-12-13 19:33:16,660 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:33:16" (1/1) ... [2022-12-13 19:33:16,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:33:16" (1/1) ... [2022-12-13 19:33:16,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:33:16,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:33:16,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:33:16,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:33:16,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:33:16" (1/1) ... [2022-12-13 19:33:16,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:33:16,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:33:16,686 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:33:16,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:33:16,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:33:16,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:33:16,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 19:33:16,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 19:33:16,713 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 19:33:16,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 19:33:16,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 19:33:16,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 19:33:16,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 19:33:16,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 19:33:16,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 19:33:16,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 19:33:16,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:33:16,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:33:16,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:33:16,715 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 19:33:16,800 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:33:16,801 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:33:17,118 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:33:17,126 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:33:17,126 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 19:33:17,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:33:17 BoogieIcfgContainer [2022-12-13 19:33:17,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:33:17,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:33:17,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:33:17,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:33:17,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:33:16" (1/3) ... [2022-12-13 19:33:17,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f636adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:33:17, skipping insertion in model container [2022-12-13 19:33:17,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:33:16" (2/3) ... [2022-12-13 19:33:17,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f636adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:33:17, skipping insertion in model container [2022-12-13 19:33:17,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:33:17" (3/3) ... [2022-12-13 19:33:17,135 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2022-12-13 19:33:17,142 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 19:33:17,152 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:33:17,152 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 19:33:17,152 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:33:17,228 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 19:33:17,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 310 transitions, 644 flow [2022-12-13 19:33:17,365 INFO L130 PetriNetUnfolder]: 29/307 cut-off events. [2022-12-13 19:33:17,366 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:33:17,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 307 events. 29/307 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 370 event pairs, 0 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 241. Up to 3 conditions per place. [2022-12-13 19:33:17,372 INFO L82 GeneralOperation]: Start removeDead. Operand has 291 places, 310 transitions, 644 flow [2022-12-13 19:33:17,379 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 277 places, 296 transitions, 610 flow [2022-12-13 19:33:17,383 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:33:17,393 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 277 places, 296 transitions, 610 flow [2022-12-13 19:33:17,396 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 277 places, 296 transitions, 610 flow [2022-12-13 19:33:17,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 296 transitions, 610 flow [2022-12-13 19:33:17,447 INFO L130 PetriNetUnfolder]: 29/296 cut-off events. [2022-12-13 19:33:17,447 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:33:17,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309 conditions, 296 events. 29/296 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 365 event pairs, 0 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 241. Up to 3 conditions per place. [2022-12-13 19:33:17,453 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2022-12-13 19:33:25,232 INFO L134 LiptonReduction]: Checked pairs total: 9943 [2022-12-13 19:33:25,232 INFO L136 LiptonReduction]: Total number of compositions: 317 [2022-12-13 19:33:25,242 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:33:25,247 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;@1821b860, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:33:25,247 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 19:33:25,252 INFO L130 PetriNetUnfolder]: 11/38 cut-off events. [2022-12-13 19:33:25,252 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:33:25,252 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:25,253 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:25,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:25,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:25,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1519872612, now seen corresponding path program 1 times [2022-12-13 19:33:25,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:25,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261368418] [2022-12-13 19:33:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:25,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:25,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:25,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261368418] [2022-12-13 19:33:25,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261368418] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:25,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:33:25,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:33:25,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179144787] [2022-12-13 19:33:25,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:25,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:33:25,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:25,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:33:25,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:33:25,720 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 627 [2022-12-13 19:33:25,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 291.3333333333333) internal successors, (874), 3 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:25,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:25,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 627 [2022-12-13 19:33:25,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:25,942 INFO L130 PetriNetUnfolder]: 1087/1478 cut-off events. [2022-12-13 19:33:25,942 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2022-12-13 19:33:25,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3067 conditions, 1478 events. 1087/1478 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4926 event pairs, 481 based on Foata normal form. 1/940 useless extension candidates. Maximal degree in co-relation 2496. Up to 1127 conditions per place. [2022-12-13 19:33:25,949 INFO L137 encePairwiseOnDemand]: 624/627 looper letters, 34 selfloop transitions, 0 changer transitions 25/60 dead transitions. [2022-12-13 19:33:25,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 60 transitions, 271 flow [2022-12-13 19:33:25,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:33:25,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:33:25,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 915 transitions. [2022-12-13 19:33:25,967 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4864433811802233 [2022-12-13 19:33:25,968 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 915 transitions. [2022-12-13 19:33:25,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 915 transitions. [2022-12-13 19:33:25,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:25,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 915 transitions. [2022-12-13 19:33:25,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:25,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 627.0) internal successors, (2508), 4 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:25,989 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 627.0) internal successors, (2508), 4 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:25,990 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 96 flow. Second operand 3 states and 915 transitions. [2022-12-13 19:33:25,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 60 transitions, 271 flow [2022-12-13 19:33:25,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 60 transitions, 249 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 19:33:26,000 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 78 flow [2022-12-13 19:33:26,001 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2022-12-13 19:33:26,004 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2022-12-13 19:33:26,005 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 78 flow [2022-12-13 19:33:26,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 291.3333333333333) internal successors, (874), 3 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:26,006 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:26,006 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:26,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 19:33:26,006 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:26,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:26,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1681791657, now seen corresponding path program 1 times [2022-12-13 19:33:26,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:26,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391817466] [2022-12-13 19:33:26,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:26,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:26,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:26,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391817466] [2022-12-13 19:33:26,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391817466] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:26,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:33:26,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:33:26,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169473839] [2022-12-13 19:33:26,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:26,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:33:26,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:26,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:33:26,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:33:26,863 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 627 [2022-12-13 19:33:26,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:26,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:26,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 627 [2022-12-13 19:33:26,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:27,192 INFO L130 PetriNetUnfolder]: 644/906 cut-off events. [2022-12-13 19:33:27,193 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 19:33:27,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1843 conditions, 906 events. 644/906 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3117 event pairs, 19 based on Foata normal form. 1/612 useless extension candidates. Maximal degree in co-relation 1839. Up to 326 conditions per place. [2022-12-13 19:33:27,196 INFO L137 encePairwiseOnDemand]: 619/627 looper letters, 85 selfloop transitions, 14 changer transitions 10/110 dead transitions. [2022-12-13 19:33:27,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 110 transitions, 460 flow [2022-12-13 19:33:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:33:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 19:33:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2028 transitions. [2022-12-13 19:33:27,199 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46206425153793573 [2022-12-13 19:33:27,200 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2028 transitions. [2022-12-13 19:33:27,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2028 transitions. [2022-12-13 19:33:27,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:27,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2028 transitions. [2022-12-13 19:33:27,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 289.7142857142857) internal successors, (2028), 7 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:27,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 627.0) internal successors, (5016), 8 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:27,209 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 627.0) internal successors, (5016), 8 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:27,210 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 78 flow. Second operand 7 states and 2028 transitions. [2022-12-13 19:33:27,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 110 transitions, 460 flow [2022-12-13 19:33:27,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 110 transitions, 456 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 19:33:27,212 INFO L231 Difference]: Finished difference. Result has 41 places, 47 transitions, 165 flow [2022-12-13 19:33:27,212 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=41, PETRI_TRANSITIONS=47} [2022-12-13 19:33:27,212 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2022-12-13 19:33:27,212 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 47 transitions, 165 flow [2022-12-13 19:33:27,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:27,213 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:27,213 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:27,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 19:33:27,213 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:27,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:27,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1164904723, now seen corresponding path program 2 times [2022-12-13 19:33:27,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:27,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441544913] [2022-12-13 19:33:27,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:27,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:27,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:27,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441544913] [2022-12-13 19:33:27,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441544913] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:27,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:33:27,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:33:27,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209493711] [2022-12-13 19:33:27,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:27,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:33:27,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:27,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:33:27,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:33:27,891 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 627 [2022-12-13 19:33:27,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 47 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:27,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:27,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 627 [2022-12-13 19:33:27,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:28,257 INFO L130 PetriNetUnfolder]: 705/1011 cut-off events. [2022-12-13 19:33:28,257 INFO L131 PetriNetUnfolder]: For 465/487 co-relation queries the response was YES. [2022-12-13 19:33:28,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2625 conditions, 1011 events. 705/1011 cut-off events. For 465/487 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3644 event pairs, 25 based on Foata normal form. 15/913 useless extension candidates. Maximal degree in co-relation 2617. Up to 380 conditions per place. [2022-12-13 19:33:28,263 INFO L137 encePairwiseOnDemand]: 619/627 looper letters, 86 selfloop transitions, 14 changer transitions 10/111 dead transitions. [2022-12-13 19:33:28,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 111 transitions, 555 flow [2022-12-13 19:33:28,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:33:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 19:33:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2029 transitions. [2022-12-13 19:33:28,269 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46229209387104125 [2022-12-13 19:33:28,269 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2029 transitions. [2022-12-13 19:33:28,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2029 transitions. [2022-12-13 19:33:28,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:28,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2029 transitions. [2022-12-13 19:33:28,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 289.85714285714283) internal successors, (2029), 7 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:28,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 627.0) internal successors, (5016), 8 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:28,288 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 627.0) internal successors, (5016), 8 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:28,288 INFO L175 Difference]: Start difference. First operand has 41 places, 47 transitions, 165 flow. Second operand 7 states and 2029 transitions. [2022-12-13 19:33:28,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 111 transitions, 555 flow [2022-12-13 19:33:28,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 111 transitions, 551 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 19:33:28,291 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 213 flow [2022-12-13 19:33:28,291 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=213, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2022-12-13 19:33:28,291 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 10 predicate places. [2022-12-13 19:33:28,292 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 213 flow [2022-12-13 19:33:28,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:28,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:28,292 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:28,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 19:33:28,292 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:28,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2022631035, now seen corresponding path program 3 times [2022-12-13 19:33:28,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:28,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84193175] [2022-12-13 19:33:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:28,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:28,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:28,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:28,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84193175] [2022-12-13 19:33:28,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84193175] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:28,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:33:28,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:33:28,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078437333] [2022-12-13 19:33:28,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:28,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:33:28,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:28,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:33:28,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:33:28,891 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 627 [2022-12-13 19:33:28,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 213 flow. Second operand has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:28,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:28,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 627 [2022-12-13 19:33:28,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:29,183 INFO L130 PetriNetUnfolder]: 769/1144 cut-off events. [2022-12-13 19:33:29,183 INFO L131 PetriNetUnfolder]: For 1504/1520 co-relation queries the response was YES. [2022-12-13 19:33:29,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3222 conditions, 1144 events. 769/1144 cut-off events. For 1504/1520 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4350 event pairs, 173 based on Foata normal form. 9/1024 useless extension candidates. Maximal degree in co-relation 3211. Up to 474 conditions per place. [2022-12-13 19:33:29,187 INFO L137 encePairwiseOnDemand]: 619/627 looper letters, 74 selfloop transitions, 14 changer transitions 11/100 dead transitions. [2022-12-13 19:33:29,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 100 transitions, 563 flow [2022-12-13 19:33:29,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:33:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:33:29,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1736 transitions. [2022-12-13 19:33:29,190 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4614566719829878 [2022-12-13 19:33:29,190 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1736 transitions. [2022-12-13 19:33:29,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1736 transitions. [2022-12-13 19:33:29,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:29,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1736 transitions. [2022-12-13 19:33:29,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 289.3333333333333) internal successors, (1736), 6 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:29,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 627.0) internal successors, (4389), 7 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) [2022-12-13 19:33:29,198 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 627.0) internal successors, (4389), 7 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) [2022-12-13 19:33:29,198 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 213 flow. Second operand 6 states and 1736 transitions. [2022-12-13 19:33:29,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 100 transitions, 563 flow [2022-12-13 19:33:29,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 100 transitions, 531 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-12-13 19:33:29,202 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 243 flow [2022-12-13 19:33:29,203 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2022-12-13 19:33:29,203 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2022-12-13 19:33:29,203 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 243 flow [2022-12-13 19:33:29,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:29,204 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:29,204 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:29,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 19:33:29,204 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:29,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:29,204 INFO L85 PathProgramCache]: Analyzing trace with hash -873652237, now seen corresponding path program 4 times [2022-12-13 19:33:29,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:29,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150744436] [2022-12-13 19:33:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:29,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:29,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:29,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150744436] [2022-12-13 19:33:29,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150744436] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:29,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:33:29,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:33:29,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848251915] [2022-12-13 19:33:29,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:29,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:33:29,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:29,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:33:29,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:33:29,617 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 627 [2022-12-13 19:33:29,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 243 flow. Second operand has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:29,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:29,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 627 [2022-12-13 19:33:29,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:29,920 INFO L130 PetriNetUnfolder]: 763/1124 cut-off events. [2022-12-13 19:33:29,920 INFO L131 PetriNetUnfolder]: For 1918/1934 co-relation queries the response was YES. [2022-12-13 19:33:29,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3339 conditions, 1124 events. 763/1124 cut-off events. For 1918/1934 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4137 event pairs, 336 based on Foata normal form. 1/998 useless extension candidates. Maximal degree in co-relation 3326. Up to 866 conditions per place. [2022-12-13 19:33:29,925 INFO L137 encePairwiseOnDemand]: 623/627 looper letters, 73 selfloop transitions, 5 changer transitions 10/89 dead transitions. [2022-12-13 19:33:29,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 89 transitions, 528 flow [2022-12-13 19:33:29,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:33:29,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:33:29,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1446 transitions. [2022-12-13 19:33:29,927 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46124401913875596 [2022-12-13 19:33:29,927 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1446 transitions. [2022-12-13 19:33:29,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1446 transitions. [2022-12-13 19:33:29,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:29,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1446 transitions. [2022-12-13 19:33:29,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 289.2) internal successors, (1446), 5 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:29,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 627.0) internal successors, (3762), 6 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:29,933 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 627.0) internal successors, (3762), 6 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:29,933 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 243 flow. Second operand 5 states and 1446 transitions. [2022-12-13 19:33:29,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 89 transitions, 528 flow [2022-12-13 19:33:29,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 89 transitions, 504 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-13 19:33:29,938 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 235 flow [2022-12-13 19:33:29,938 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2022-12-13 19:33:29,938 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2022-12-13 19:33:29,938 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 235 flow [2022-12-13 19:33:29,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:29,939 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:29,939 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:29,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 19:33:29,939 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:29,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:29,940 INFO L85 PathProgramCache]: Analyzing trace with hash -382250295, now seen corresponding path program 5 times [2022-12-13 19:33:29,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:29,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811975682] [2022-12-13 19:33:29,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:29,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:30,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:30,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811975682] [2022-12-13 19:33:30,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811975682] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:30,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:33:30,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:33:30,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857974155] [2022-12-13 19:33:30,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:30,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:33:30,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:30,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:33:30,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:33:30,335 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 627 [2022-12-13 19:33:30,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 235 flow. Second operand has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:30,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:30,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 627 [2022-12-13 19:33:30,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:30,645 INFO L130 PetriNetUnfolder]: 847/1276 cut-off events. [2022-12-13 19:33:30,645 INFO L131 PetriNetUnfolder]: For 1733/1749 co-relation queries the response was YES. [2022-12-13 19:33:30,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3727 conditions, 1276 events. 847/1276 cut-off events. For 1733/1749 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4987 event pairs, 388 based on Foata normal form. 9/1136 useless extension candidates. Maximal degree in co-relation 3713. Up to 930 conditions per place. [2022-12-13 19:33:30,651 INFO L137 encePairwiseOnDemand]: 623/627 looper letters, 77 selfloop transitions, 6 changer transitions 10/94 dead transitions. [2022-12-13 19:33:30,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 94 transitions, 572 flow [2022-12-13 19:33:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:33:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:33:30,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1449 transitions. [2022-12-13 19:33:30,655 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46220095693779906 [2022-12-13 19:33:30,655 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1449 transitions. [2022-12-13 19:33:30,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1449 transitions. [2022-12-13 19:33:30,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:30,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1449 transitions. [2022-12-13 19:33:30,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 289.8) internal successors, (1449), 5 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:30,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 627.0) internal successors, (3762), 6 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:30,663 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 627.0) internal successors, (3762), 6 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:30,663 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 235 flow. Second operand 5 states and 1449 transitions. [2022-12-13 19:33:30,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 94 transitions, 572 flow [2022-12-13 19:33:30,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 94 transitions, 557 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-13 19:33:30,671 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 272 flow [2022-12-13 19:33:30,671 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=272, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2022-12-13 19:33:30,672 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2022-12-13 19:33:30,672 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 272 flow [2022-12-13 19:33:30,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:30,673 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:30,673 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:30,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 19:33:30,673 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:30,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:30,674 INFO L85 PathProgramCache]: Analyzing trace with hash -409064301, now seen corresponding path program 6 times [2022-12-13 19:33:30,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:30,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818904073] [2022-12-13 19:33:30,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:30,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:31,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:31,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818904073] [2022-12-13 19:33:31,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818904073] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:31,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:33:31,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:33:31,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481756748] [2022-12-13 19:33:31,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:31,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:33:31,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:31,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:33:31,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:33:31,114 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 627 [2022-12-13 19:33:31,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:31,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:31,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 627 [2022-12-13 19:33:31,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:31,409 INFO L130 PetriNetUnfolder]: 836/1253 cut-off events. [2022-12-13 19:33:31,409 INFO L131 PetriNetUnfolder]: For 1717/1733 co-relation queries the response was YES. [2022-12-13 19:33:31,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3757 conditions, 1253 events. 836/1253 cut-off events. For 1717/1733 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4805 event pairs, 388 based on Foata normal form. 9/1115 useless extension candidates. Maximal degree in co-relation 3742. Up to 930 conditions per place. [2022-12-13 19:33:31,414 INFO L137 encePairwiseOnDemand]: 623/627 looper letters, 61 selfloop transitions, 4 changer transitions 12/78 dead transitions. [2022-12-13 19:33:31,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 78 transitions, 503 flow [2022-12-13 19:33:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:33:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:33:31,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1434 transitions. [2022-12-13 19:33:31,417 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4574162679425837 [2022-12-13 19:33:31,417 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1434 transitions. [2022-12-13 19:33:31,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1434 transitions. [2022-12-13 19:33:31,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:31,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1434 transitions. [2022-12-13 19:33:31,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 286.8) internal successors, (1434), 5 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:31,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 627.0) internal successors, (3762), 6 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:31,422 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 627.0) internal successors, (3762), 6 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:31,422 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 272 flow. Second operand 5 states and 1434 transitions. [2022-12-13 19:33:31,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 78 transitions, 503 flow [2022-12-13 19:33:31,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 78 transitions, 495 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 19:33:31,429 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 269 flow [2022-12-13 19:33:31,429 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=269, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2022-12-13 19:33:31,430 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2022-12-13 19:33:31,430 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 269 flow [2022-12-13 19:33:31,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:31,430 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:31,430 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:31,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 19:33:31,431 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:31,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:31,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1778152377, now seen corresponding path program 1 times [2022-12-13 19:33:31,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:31,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726449732] [2022-12-13 19:33:31,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:31,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:31,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:31,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726449732] [2022-12-13 19:33:31,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726449732] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:31,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:33:31,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:33:31,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053659610] [2022-12-13 19:33:31,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:31,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:33:31,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:31,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:33:31,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:33:31,521 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 627 [2022-12-13 19:33:31,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 269 flow. Second operand has 4 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:31,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:31,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 627 [2022-12-13 19:33:31,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:31,766 INFO L130 PetriNetUnfolder]: 1074/1629 cut-off events. [2022-12-13 19:33:31,766 INFO L131 PetriNetUnfolder]: For 2586/2608 co-relation queries the response was YES. [2022-12-13 19:33:31,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4715 conditions, 1629 events. 1074/1629 cut-off events. For 2586/2608 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7204 event pairs, 78 based on Foata normal form. 47/1476 useless extension candidates. Maximal degree in co-relation 4699. Up to 974 conditions per place. [2022-12-13 19:33:31,776 INFO L137 encePairwiseOnDemand]: 623/627 looper letters, 82 selfloop transitions, 7 changer transitions 0/90 dead transitions. [2022-12-13 19:33:31,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 90 transitions, 608 flow [2022-12-13 19:33:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:33:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:33:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1186 transitions. [2022-12-13 19:33:31,778 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4728867623604466 [2022-12-13 19:33:31,778 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1186 transitions. [2022-12-13 19:33:31,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1186 transitions. [2022-12-13 19:33:31,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:31,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1186 transitions. [2022-12-13 19:33:31,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.5) internal successors, (1186), 4 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) [2022-12-13 19:33:31,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 627.0) internal successors, (3135), 5 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:31,785 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 627.0) internal successors, (3135), 5 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:31,785 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 269 flow. Second operand 4 states and 1186 transitions. [2022-12-13 19:33:31,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 90 transitions, 608 flow [2022-12-13 19:33:31,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 90 transitions, 594 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-12-13 19:33:31,793 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 332 flow [2022-12-13 19:33:31,794 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2022-12-13 19:33:31,794 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2022-12-13 19:33:31,794 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 332 flow [2022-12-13 19:33:31,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:31,795 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:31,795 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:31,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 19:33:31,796 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:31,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:31,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1961110803, now seen corresponding path program 2 times [2022-12-13 19:33:31,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:31,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139657333] [2022-12-13 19:33:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:31,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:31,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:31,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139657333] [2022-12-13 19:33:31,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139657333] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:31,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:33:31,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:33:31,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254905402] [2022-12-13 19:33:31,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:31,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:33:31,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:31,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:33:31,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:33:31,878 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 627 [2022-12-13 19:33:31,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 332 flow. Second operand has 4 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:31,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:31,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 627 [2022-12-13 19:33:31,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:32,130 INFO L130 PetriNetUnfolder]: 988/1510 cut-off events. [2022-12-13 19:33:32,130 INFO L131 PetriNetUnfolder]: For 2535/2555 co-relation queries the response was YES. [2022-12-13 19:33:32,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4576 conditions, 1510 events. 988/1510 cut-off events. For 2535/2555 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6539 event pairs, 59 based on Foata normal form. 48/1375 useless extension candidates. Maximal degree in co-relation 4559. Up to 880 conditions per place. [2022-12-13 19:33:32,138 INFO L137 encePairwiseOnDemand]: 623/627 looper letters, 84 selfloop transitions, 9 changer transitions 0/94 dead transitions. [2022-12-13 19:33:32,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 94 transitions, 667 flow [2022-12-13 19:33:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:33:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:33:32,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1185 transitions. [2022-12-13 19:33:32,141 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47248803827751196 [2022-12-13 19:33:32,141 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1185 transitions. [2022-12-13 19:33:32,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1185 transitions. [2022-12-13 19:33:32,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:32,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1185 transitions. [2022-12-13 19:33:32,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.25) internal successors, (1185), 4 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:32,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 627.0) internal successors, (3135), 5 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:32,146 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 627.0) internal successors, (3135), 5 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:32,146 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 332 flow. Second operand 4 states and 1185 transitions. [2022-12-13 19:33:32,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 94 transitions, 667 flow [2022-12-13 19:33:32,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 94 transitions, 667 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:33:32,151 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 400 flow [2022-12-13 19:33:32,151 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=400, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2022-12-13 19:33:32,152 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 28 predicate places. [2022-12-13 19:33:32,152 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 400 flow [2022-12-13 19:33:32,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:32,152 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:32,152 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:32,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 19:33:32,153 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:32,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:32,153 INFO L85 PathProgramCache]: Analyzing trace with hash -760442159, now seen corresponding path program 3 times [2022-12-13 19:33:32,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:32,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847738871] [2022-12-13 19:33:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:32,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:32,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:32,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847738871] [2022-12-13 19:33:32,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847738871] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:32,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:33:32,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:33:32,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49386037] [2022-12-13 19:33:32,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:32,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:33:32,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:32,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:33:32,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:33:32,237 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 627 [2022-12-13 19:33:32,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 400 flow. Second operand has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:32,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:32,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 627 [2022-12-13 19:33:32,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:32,466 INFO L130 PetriNetUnfolder]: 928/1399 cut-off events. [2022-12-13 19:33:32,466 INFO L131 PetriNetUnfolder]: For 2968/2990 co-relation queries the response was YES. [2022-12-13 19:33:32,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4646 conditions, 1399 events. 928/1399 cut-off events. For 2968/2990 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5828 event pairs, 209 based on Foata normal form. 18/1249 useless extension candidates. Maximal degree in co-relation 4626. Up to 1060 conditions per place. [2022-12-13 19:33:32,471 INFO L137 encePairwiseOnDemand]: 622/627 looper letters, 76 selfloop transitions, 14 changer transitions 1/92 dead transitions. [2022-12-13 19:33:32,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 696 flow [2022-12-13 19:33:32,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:33:32,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:33:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1456 transitions. [2022-12-13 19:33:32,474 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46443381180223287 [2022-12-13 19:33:32,474 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1456 transitions. [2022-12-13 19:33:32,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1456 transitions. [2022-12-13 19:33:32,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:32,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1456 transitions. [2022-12-13 19:33:32,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 291.2) internal successors, (1456), 5 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:32,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 627.0) internal successors, (3762), 6 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:32,478 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 627.0) internal successors, (3762), 6 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:32,479 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 400 flow. Second operand 5 states and 1456 transitions. [2022-12-13 19:33:32,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 696 flow [2022-12-13 19:33:32,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 92 transitions, 694 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 19:33:32,486 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 437 flow [2022-12-13 19:33:32,486 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=437, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2022-12-13 19:33:32,486 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2022-12-13 19:33:32,486 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 437 flow [2022-12-13 19:33:32,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:32,487 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:32,487 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:32,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 19:33:32,487 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:32,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:32,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1103464057, now seen corresponding path program 1 times [2022-12-13 19:33:32,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:32,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261177072] [2022-12-13 19:33:32,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:32,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:32,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:32,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261177072] [2022-12-13 19:33:32,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261177072] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:32,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:33:32,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:33:32,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783818693] [2022-12-13 19:33:32,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:32,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:33:32,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:32,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:33:32,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:33:32,570 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 627 [2022-12-13 19:33:32,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 437 flow. Second operand has 4 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:32,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:32,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 627 [2022-12-13 19:33:32,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:32,784 INFO L130 PetriNetUnfolder]: 1007/1549 cut-off events. [2022-12-13 19:33:32,784 INFO L131 PetriNetUnfolder]: For 3898/3898 co-relation queries the response was YES. [2022-12-13 19:33:32,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5073 conditions, 1549 events. 1007/1549 cut-off events. For 3898/3898 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6940 event pairs, 136 based on Foata normal form. 16/1386 useless extension candidates. Maximal degree in co-relation 5051. Up to 1186 conditions per place. [2022-12-13 19:33:32,794 INFO L137 encePairwiseOnDemand]: 623/627 looper letters, 77 selfloop transitions, 11 changer transitions 0/89 dead transitions. [2022-12-13 19:33:32,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 89 transitions, 725 flow [2022-12-13 19:33:32,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:33:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:33:32,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1179 transitions. [2022-12-13 19:33:32,797 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4700956937799043 [2022-12-13 19:33:32,797 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1179 transitions. [2022-12-13 19:33:32,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1179 transitions. [2022-12-13 19:33:32,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:32,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1179 transitions. [2022-12-13 19:33:32,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 294.75) internal successors, (1179), 4 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:32,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 627.0) internal successors, (3135), 5 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:32,804 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 627.0) internal successors, (3135), 5 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:32,804 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 437 flow. Second operand 4 states and 1179 transitions. [2022-12-13 19:33:32,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 89 transitions, 725 flow [2022-12-13 19:33:32,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 89 transitions, 688 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-12-13 19:33:32,812 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 477 flow [2022-12-13 19:33:32,812 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=477, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2022-12-13 19:33:32,812 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2022-12-13 19:33:32,812 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 477 flow [2022-12-13 19:33:32,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:32,813 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:32,813 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:32,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 19:33:32,813 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:32,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:32,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1259183719, now seen corresponding path program 2 times [2022-12-13 19:33:32,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:32,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160554669] [2022-12-13 19:33:32,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:32,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:32,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:32,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160554669] [2022-12-13 19:33:32,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160554669] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:32,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:33:32,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:33:32,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655857742] [2022-12-13 19:33:32,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:32,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:33:32,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:32,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:33:32,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:33:32,919 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 627 [2022-12-13 19:33:32,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 477 flow. Second operand has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:32,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:32,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 627 [2022-12-13 19:33:32,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:33,180 INFO L130 PetriNetUnfolder]: 971/1485 cut-off events. [2022-12-13 19:33:33,180 INFO L131 PetriNetUnfolder]: For 3037/3043 co-relation queries the response was YES. [2022-12-13 19:33:33,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5024 conditions, 1485 events. 971/1485 cut-off events. For 3037/3043 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6424 event pairs, 231 based on Foata normal form. 14/1324 useless extension candidates. Maximal degree in co-relation 5005. Up to 1076 conditions per place. [2022-12-13 19:33:33,190 INFO L137 encePairwiseOnDemand]: 622/627 looper letters, 79 selfloop transitions, 14 changer transitions 2/96 dead transitions. [2022-12-13 19:33:33,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 96 transitions, 783 flow [2022-12-13 19:33:33,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:33:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:33:33,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1456 transitions. [2022-12-13 19:33:33,193 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46443381180223287 [2022-12-13 19:33:33,194 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1456 transitions. [2022-12-13 19:33:33,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1456 transitions. [2022-12-13 19:33:33,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:33,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1456 transitions. [2022-12-13 19:33:33,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 291.2) internal successors, (1456), 5 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:33,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 627.0) internal successors, (3762), 6 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:33,202 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 627.0) internal successors, (3762), 6 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:33,202 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 477 flow. Second operand 5 states and 1456 transitions. [2022-12-13 19:33:33,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 96 transitions, 783 flow [2022-12-13 19:33:33,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 96 transitions, 764 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-13 19:33:33,211 INFO L231 Difference]: Finished difference. Result has 74 places, 67 transitions, 517 flow [2022-12-13 19:33:33,218 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=517, PETRI_PLACES=74, PETRI_TRANSITIONS=67} [2022-12-13 19:33:33,218 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 36 predicate places. [2022-12-13 19:33:33,219 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 67 transitions, 517 flow [2022-12-13 19:33:33,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:33,219 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:33,219 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:33,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 19:33:33,220 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:33,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:33,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1710746363, now seen corresponding path program 3 times [2022-12-13 19:33:33,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:33,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170276258] [2022-12-13 19:33:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:33,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:33,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:33,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170276258] [2022-12-13 19:33:33,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170276258] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:33,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:33:33,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:33:33,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604517663] [2022-12-13 19:33:33,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:33,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:33:33,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:33,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:33:33,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:33:33,304 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 627 [2022-12-13 19:33:33,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 517 flow. Second operand has 4 states, 4 states have (on average 283.25) internal successors, (1133), 4 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:33,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:33,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 627 [2022-12-13 19:33:33,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:33,517 INFO L130 PetriNetUnfolder]: 875/1318 cut-off events. [2022-12-13 19:33:33,517 INFO L131 PetriNetUnfolder]: For 3477/3481 co-relation queries the response was YES. [2022-12-13 19:33:33,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4556 conditions, 1318 events. 875/1318 cut-off events. For 3477/3481 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5294 event pairs, 335 based on Foata normal form. 20/1177 useless extension candidates. Maximal degree in co-relation 4536. Up to 959 conditions per place. [2022-12-13 19:33:33,522 INFO L137 encePairwiseOnDemand]: 622/627 looper letters, 91 selfloop transitions, 10 changer transitions 4/106 dead transitions. [2022-12-13 19:33:33,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 106 transitions, 837 flow [2022-12-13 19:33:33,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:33:33,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:33:33,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1469 transitions. [2022-12-13 19:33:33,527 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46858054226475276 [2022-12-13 19:33:33,528 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1469 transitions. [2022-12-13 19:33:33,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1469 transitions. [2022-12-13 19:33:33,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:33,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1469 transitions. [2022-12-13 19:33:33,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 293.8) internal successors, (1469), 5 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:33,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 627.0) internal successors, (3762), 6 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:33,533 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 627.0) internal successors, (3762), 6 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:33,533 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 517 flow. Second operand 5 states and 1469 transitions. [2022-12-13 19:33:33,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 106 transitions, 837 flow [2022-12-13 19:33:33,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 106 transitions, 824 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 19:33:33,540 INFO L231 Difference]: Finished difference. Result has 77 places, 65 transitions, 493 flow [2022-12-13 19:33:33,540 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=493, PETRI_PLACES=77, PETRI_TRANSITIONS=65} [2022-12-13 19:33:33,541 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2022-12-13 19:33:33,541 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 65 transitions, 493 flow [2022-12-13 19:33:33,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 283.25) internal successors, (1133), 4 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:33,541 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:33,541 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:33,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 19:33:33,542 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:33,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:33,542 INFO L85 PathProgramCache]: Analyzing trace with hash 643469991, now seen corresponding path program 4 times [2022-12-13 19:33:33,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:33,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142270374] [2022-12-13 19:33:33,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:33,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:33,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:33,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142270374] [2022-12-13 19:33:33,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142270374] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:33,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:33:33,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:33:33,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209877367] [2022-12-13 19:33:33,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:33,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:33:33,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:33,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:33:33,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:33:33,634 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 627 [2022-12-13 19:33:33,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 65 transitions, 493 flow. Second operand has 4 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:33,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:33,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 627 [2022-12-13 19:33:33,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:33,829 INFO L130 PetriNetUnfolder]: 815/1221 cut-off events. [2022-12-13 19:33:33,829 INFO L131 PetriNetUnfolder]: For 3455/3461 co-relation queries the response was YES. [2022-12-13 19:33:33,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4216 conditions, 1221 events. 815/1221 cut-off events. For 3455/3461 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4840 event pairs, 140 based on Foata normal form. 16/1092 useless extension candidates. Maximal degree in co-relation 4196. Up to 1022 conditions per place. [2022-12-13 19:33:33,834 INFO L137 encePairwiseOnDemand]: 623/627 looper letters, 69 selfloop transitions, 11 changer transitions 3/84 dead transitions. [2022-12-13 19:33:33,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 84 transitions, 699 flow [2022-12-13 19:33:33,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:33:33,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:33:33,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1176 transitions. [2022-12-13 19:33:33,836 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4688995215311005 [2022-12-13 19:33:33,836 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1176 transitions. [2022-12-13 19:33:33,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1176 transitions. [2022-12-13 19:33:33,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:33,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1176 transitions. [2022-12-13 19:33:33,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:33,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 627.0) internal successors, (3135), 5 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:33,839 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 627.0) internal successors, (3135), 5 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:33,839 INFO L175 Difference]: Start difference. First operand has 77 places, 65 transitions, 493 flow. Second operand 4 states and 1176 transitions. [2022-12-13 19:33:33,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 84 transitions, 699 flow [2022-12-13 19:33:33,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 673 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-12-13 19:33:33,849 INFO L231 Difference]: Finished difference. Result has 75 places, 63 transitions, 453 flow [2022-12-13 19:33:33,849 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=453, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2022-12-13 19:33:33,850 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 37 predicate places. [2022-12-13 19:33:33,850 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 453 flow [2022-12-13 19:33:33,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:33,850 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:33,851 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:33,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 19:33:33,851 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:33,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:33,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1863582007, now seen corresponding path program 4 times [2022-12-13 19:33:33,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:33,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597386998] [2022-12-13 19:33:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:33,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:33,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:33,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597386998] [2022-12-13 19:33:33,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597386998] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:33,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:33:33,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:33:33,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969564893] [2022-12-13 19:33:33,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:33,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:33:33,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:33,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:33:33,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:33:33,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 627 [2022-12-13 19:33:33,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 453 flow. Second operand has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:33,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:33,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 627 [2022-12-13 19:33:33,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:34,134 INFO L130 PetriNetUnfolder]: 800/1204 cut-off events. [2022-12-13 19:33:34,134 INFO L131 PetriNetUnfolder]: For 2328/2334 co-relation queries the response was YES. [2022-12-13 19:33:34,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4077 conditions, 1204 events. 800/1204 cut-off events. For 2328/2334 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4805 event pairs, 141 based on Foata normal form. 16/1077 useless extension candidates. Maximal degree in co-relation 4059. Up to 1076 conditions per place. [2022-12-13 19:33:34,138 INFO L137 encePairwiseOnDemand]: 622/627 looper letters, 60 selfloop transitions, 6 changer transitions 12/79 dead transitions. [2022-12-13 19:33:34,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 79 transitions, 655 flow [2022-12-13 19:33:34,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:33:34,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:33:34,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1164 transitions. [2022-12-13 19:33:34,140 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46411483253588515 [2022-12-13 19:33:34,140 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1164 transitions. [2022-12-13 19:33:34,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1164 transitions. [2022-12-13 19:33:34,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:34,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1164 transitions. [2022-12-13 19:33:34,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 291.0) internal successors, (1164), 4 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) [2022-12-13 19:33:34,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 627.0) internal successors, (3135), 5 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:34,143 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 627.0) internal successors, (3135), 5 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:34,143 INFO L175 Difference]: Start difference. First operand has 75 places, 63 transitions, 453 flow. Second operand 4 states and 1164 transitions. [2022-12-13 19:33:34,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 79 transitions, 655 flow [2022-12-13 19:33:34,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 79 transitions, 624 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-12-13 19:33:34,147 INFO L231 Difference]: Finished difference. Result has 75 places, 59 transitions, 390 flow [2022-12-13 19:33:34,147 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=390, PETRI_PLACES=75, PETRI_TRANSITIONS=59} [2022-12-13 19:33:34,147 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 37 predicate places. [2022-12-13 19:33:34,147 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 59 transitions, 390 flow [2022-12-13 19:33:34,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:34,148 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:34,148 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:34,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 19:33:34,148 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:34,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:34,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1330715805, now seen corresponding path program 5 times [2022-12-13 19:33:34,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:34,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435303294] [2022-12-13 19:33:34,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:34,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:34,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:34,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435303294] [2022-12-13 19:33:34,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435303294] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:34,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:33:34,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:33:34,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429439519] [2022-12-13 19:33:34,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:34,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:33:34,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:34,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:33:34,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:33:34,242 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 627 [2022-12-13 19:33:34,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 59 transitions, 390 flow. Second operand has 4 states, 4 states have (on average 283.25) internal successors, (1133), 4 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:34,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:34,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 627 [2022-12-13 19:33:34,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:34,416 INFO L130 PetriNetUnfolder]: 750/1111 cut-off events. [2022-12-13 19:33:34,416 INFO L131 PetriNetUnfolder]: For 1779/1779 co-relation queries the response was YES. [2022-12-13 19:33:34,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3743 conditions, 1111 events. 750/1111 cut-off events. For 1779/1779 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4154 event pairs, 374 based on Foata normal form. 4/972 useless extension candidates. Maximal degree in co-relation 3726. Up to 1074 conditions per place. [2022-12-13 19:33:34,421 INFO L137 encePairwiseOnDemand]: 624/627 looper letters, 55 selfloop transitions, 0 changer transitions 8/64 dead transitions. [2022-12-13 19:33:34,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 64 transitions, 515 flow [2022-12-13 19:33:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:33:34,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:33:34,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1154 transitions. [2022-12-13 19:33:34,423 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46012759170653905 [2022-12-13 19:33:34,423 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1154 transitions. [2022-12-13 19:33:34,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1154 transitions. [2022-12-13 19:33:34,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:34,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1154 transitions. [2022-12-13 19:33:34,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 288.5) internal successors, (1154), 4 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:34,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 627.0) internal successors, (3135), 5 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:34,426 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 627.0) internal successors, (3135), 5 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:34,426 INFO L175 Difference]: Start difference. First operand has 75 places, 59 transitions, 390 flow. Second operand 4 states and 1154 transitions. [2022-12-13 19:33:34,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 64 transitions, 515 flow [2022-12-13 19:33:34,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 64 transitions, 490 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-12-13 19:33:34,429 INFO L231 Difference]: Finished difference. Result has 71 places, 56 transitions, 326 flow [2022-12-13 19:33:34,429 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=326, PETRI_PLACES=71, PETRI_TRANSITIONS=56} [2022-12-13 19:33:34,430 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2022-12-13 19:33:34,430 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 56 transitions, 326 flow [2022-12-13 19:33:34,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 283.25) internal successors, (1133), 4 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:34,430 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:34,430 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:34,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 19:33:34,430 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:34,430 INFO L85 PathProgramCache]: Analyzing trace with hash 92400947, now seen corresponding path program 5 times [2022-12-13 19:33:34,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:34,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641483938] [2022-12-13 19:33:34,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:34,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:34,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:34,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641483938] [2022-12-13 19:33:34,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641483938] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:34,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:33:34,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:33:34,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795001845] [2022-12-13 19:33:34,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:34,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:33:34,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:34,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:33:34,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:33:34,501 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 627 [2022-12-13 19:33:34,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 56 transitions, 326 flow. Second operand has 4 states, 4 states have (on average 283.25) internal successors, (1133), 4 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:34,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:34,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 627 [2022-12-13 19:33:34,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:34,647 INFO L130 PetriNetUnfolder]: 683/1000 cut-off events. [2022-12-13 19:33:34,647 INFO L131 PetriNetUnfolder]: For 1148/1148 co-relation queries the response was YES. [2022-12-13 19:33:34,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3232 conditions, 1000 events. 683/1000 cut-off events. For 1148/1148 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3571 event pairs, 333 based on Foata normal form. 8/881 useless extension candidates. Maximal degree in co-relation 3219. Up to 959 conditions per place. [2022-12-13 19:33:34,650 INFO L137 encePairwiseOnDemand]: 624/627 looper letters, 52 selfloop transitions, 0 changer transitions 9/62 dead transitions. [2022-12-13 19:33:34,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 62 transitions, 454 flow [2022-12-13 19:33:34,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:33:34,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:33:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1154 transitions. [2022-12-13 19:33:34,652 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46012759170653905 [2022-12-13 19:33:34,652 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1154 transitions. [2022-12-13 19:33:34,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1154 transitions. [2022-12-13 19:33:34,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:34,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1154 transitions. [2022-12-13 19:33:34,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 288.5) internal successors, (1154), 4 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:34,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 627.0) internal successors, (3135), 5 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:34,655 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 627.0) internal successors, (3135), 5 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:34,655 INFO L175 Difference]: Start difference. First operand has 71 places, 56 transitions, 326 flow. Second operand 4 states and 1154 transitions. [2022-12-13 19:33:34,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 62 transitions, 454 flow [2022-12-13 19:33:34,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 62 transitions, 452 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 19:33:34,657 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 287 flow [2022-12-13 19:33:34,657 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2022-12-13 19:33:34,657 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 27 predicate places. [2022-12-13 19:33:34,657 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 287 flow [2022-12-13 19:33:34,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 283.25) internal successors, (1133), 4 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:34,657 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:34,657 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:34,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 19:33:34,658 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:34,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:34,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1822721641, now seen corresponding path program 1 times [2022-12-13 19:33:34,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:34,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046349602] [2022-12-13 19:33:34,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:34,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:35,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:35,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046349602] [2022-12-13 19:33:35,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046349602] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:35,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:33:35,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 19:33:35,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823363416] [2022-12-13 19:33:35,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:35,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 19:33:35,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:35,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 19:33:35,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-13 19:33:35,597 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 627 [2022-12-13 19:33:35,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 287 flow. Second operand has 9 states, 9 states have (on average 261.44444444444446) internal successors, (2353), 9 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:35,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:35,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 627 [2022-12-13 19:33:35,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:36,091 INFO L130 PetriNetUnfolder]: 1287/1896 cut-off events. [2022-12-13 19:33:36,091 INFO L131 PetriNetUnfolder]: For 1972/1972 co-relation queries the response was YES. [2022-12-13 19:33:36,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6178 conditions, 1896 events. 1287/1896 cut-off events. For 1972/1972 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7941 event pairs, 374 based on Foata normal form. 61/1709 useless extension candidates. Maximal degree in co-relation 6165. Up to 556 conditions per place. [2022-12-13 19:33:36,100 INFO L137 encePairwiseOnDemand]: 614/627 looper letters, 99 selfloop transitions, 23 changer transitions 12/135 dead transitions. [2022-12-13 19:33:36,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 135 transitions, 946 flow [2022-12-13 19:33:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:33:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:33:36,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2168 transitions. [2022-12-13 19:33:36,108 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43221690590111644 [2022-12-13 19:33:36,108 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2168 transitions. [2022-12-13 19:33:36,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2168 transitions. [2022-12-13 19:33:36,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:36,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2168 transitions. [2022-12-13 19:33:36,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 271.0) internal successors, (2168), 8 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:36,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 627.0) internal successors, (5643), 9 states have internal predecessors, (5643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:36,121 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 627.0) internal successors, (5643), 9 states have internal predecessors, (5643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:36,121 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 287 flow. Second operand 8 states and 2168 transitions. [2022-12-13 19:33:36,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 135 transitions, 946 flow [2022-12-13 19:33:36,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 135 transitions, 942 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 19:33:36,126 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 492 flow [2022-12-13 19:33:36,126 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=492, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2022-12-13 19:33:36,127 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2022-12-13 19:33:36,127 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 492 flow [2022-12-13 19:33:36,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 261.44444444444446) internal successors, (2353), 9 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:36,128 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:36,128 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:36,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 19:33:36,128 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:36,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:36,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1814722349, now seen corresponding path program 1 times [2022-12-13 19:33:36,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:36,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103659216] [2022-12-13 19:33:36,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:36,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:36,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:36,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103659216] [2022-12-13 19:33:36,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103659216] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:33:36,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312480749] [2022-12-13 19:33:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:36,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:33:36,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:33:36,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:33:36,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:33:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:36,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 19:33:36,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:33:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:37,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:33:37,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:33:37,271 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 161 treesize of output 125 [2022-12-13 19:33:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:38,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312480749] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:33:38,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:33:38,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 24 [2022-12-13 19:33:38,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000541932] [2022-12-13 19:33:38,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:38,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:33:38,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:38,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:33:38,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-12-13 19:33:39,342 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 627 [2022-12-13 19:33:39,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 492 flow. Second operand has 10 states, 10 states have (on average 249.3) internal successors, (2493), 10 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:39,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:39,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 627 [2022-12-13 19:33:39,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:41,552 INFO L130 PetriNetUnfolder]: 2205/3337 cut-off events. [2022-12-13 19:33:41,553 INFO L131 PetriNetUnfolder]: For 5037/5040 co-relation queries the response was YES. [2022-12-13 19:33:41,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11879 conditions, 3337 events. 2205/3337 cut-off events. For 5037/5040 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16268 event pairs, 458 based on Foata normal form. 55/2976 useless extension candidates. Maximal degree in co-relation 11860. Up to 548 conditions per place. [2022-12-13 19:33:41,566 INFO L137 encePairwiseOnDemand]: 613/627 looper letters, 226 selfloop transitions, 48 changer transitions 14/289 dead transitions. [2022-12-13 19:33:41,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 289 transitions, 2127 flow [2022-12-13 19:33:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 19:33:41,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 19:33:41,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4425 transitions. [2022-12-13 19:33:41,572 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4151421334083873 [2022-12-13 19:33:41,572 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4425 transitions. [2022-12-13 19:33:41,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4425 transitions. [2022-12-13 19:33:41,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:41,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4425 transitions. [2022-12-13 19:33:41,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 260.29411764705884) internal successors, (4425), 17 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:41,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 627.0) internal successors, (11286), 18 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:41,584 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 627.0) internal successors, (11286), 18 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:41,584 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 492 flow. Second operand 17 states and 4425 transitions. [2022-12-13 19:33:41,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 289 transitions, 2127 flow [2022-12-13 19:33:41,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 289 transitions, 2095 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 19:33:41,594 INFO L231 Difference]: Finished difference. Result has 95 places, 101 transitions, 913 flow [2022-12-13 19:33:41,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=913, PETRI_PLACES=95, PETRI_TRANSITIONS=101} [2022-12-13 19:33:41,594 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 57 predicate places. [2022-12-13 19:33:41,594 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 101 transitions, 913 flow [2022-12-13 19:33:41,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 249.3) internal successors, (2493), 10 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:41,595 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:41,595 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:41,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:33:41,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:33:41,797 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:41,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:41,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1229707524, now seen corresponding path program 1 times [2022-12-13 19:33:41,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:41,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682192249] [2022-12-13 19:33:41,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:41,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:41,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:41,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682192249] [2022-12-13 19:33:41,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682192249] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:33:41,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267760576] [2022-12-13 19:33:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:41,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:33:41,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:33:41,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:33:41,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 19:33:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:42,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 19:33:42,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:33:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:42,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:33:42,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:33:42,557 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 161 treesize of output 125 [2022-12-13 19:33:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:33:43,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267760576] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:33:43,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:33:43,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2022-12-13 19:33:43,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136324743] [2022-12-13 19:33:43,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:43,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:33:43,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:43,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:33:43,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2022-12-13 19:33:43,634 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 627 [2022-12-13 19:33:43,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 101 transitions, 913 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:43,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:43,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 627 [2022-12-13 19:33:43,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:45,007 INFO L130 PetriNetUnfolder]: 3378/5122 cut-off events. [2022-12-13 19:33:45,007 INFO L131 PetriNetUnfolder]: For 16175/16209 co-relation queries the response was YES. [2022-12-13 19:33:45,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20650 conditions, 5122 events. 3378/5122 cut-off events. For 16175/16209 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 27447 event pairs, 377 based on Foata normal form. 24/4557 useless extension candidates. Maximal degree in co-relation 20622. Up to 1258 conditions per place. [2022-12-13 19:33:45,029 INFO L137 encePairwiseOnDemand]: 613/627 looper letters, 254 selfloop transitions, 76 changer transitions 9/340 dead transitions. [2022-12-13 19:33:45,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 340 transitions, 3325 flow [2022-12-13 19:33:45,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 19:33:45,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 19:33:45,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3300 transitions. [2022-12-13 19:33:45,032 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4048582995951417 [2022-12-13 19:33:45,032 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3300 transitions. [2022-12-13 19:33:45,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3300 transitions. [2022-12-13 19:33:45,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:45,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3300 transitions. [2022-12-13 19:33:45,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 253.84615384615384) internal successors, (3300), 13 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:45,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 627.0) internal successors, (8778), 14 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:45,039 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 627.0) internal successors, (8778), 14 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:45,040 INFO L175 Difference]: Start difference. First operand has 95 places, 101 transitions, 913 flow. Second operand 13 states and 3300 transitions. [2022-12-13 19:33:45,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 340 transitions, 3325 flow [2022-12-13 19:33:45,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 340 transitions, 3122 flow, removed 45 selfloop flow, removed 6 redundant places. [2022-12-13 19:33:45,096 INFO L231 Difference]: Finished difference. Result has 110 places, 162 transitions, 1789 flow [2022-12-13 19:33:45,097 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1789, PETRI_PLACES=110, PETRI_TRANSITIONS=162} [2022-12-13 19:33:45,097 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 72 predicate places. [2022-12-13 19:33:45,097 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 162 transitions, 1789 flow [2022-12-13 19:33:45,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:45,098 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:45,098 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:45,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 19:33:45,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:33:45,299 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:45,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:45,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1501375598, now seen corresponding path program 1 times [2022-12-13 19:33:45,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:45,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008746133] [2022-12-13 19:33:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:45,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:45,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:45,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:45,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008746133] [2022-12-13 19:33:45,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008746133] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:33:45,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538015502] [2022-12-13 19:33:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:45,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:33:45,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:33:45,460 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:33:45,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 19:33:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:45,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 19:33:45,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:33:45,871 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:33:45,872 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 119 treesize of output 84 [2022-12-13 19:33:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:45,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:33:46,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:33:46,089 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 161 treesize of output 125 [2022-12-13 19:33:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:33:47,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538015502] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:33:47,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:33:47,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2022-12-13 19:33:47,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463553328] [2022-12-13 19:33:47,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:47,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:33:47,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:47,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:33:47,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2022-12-13 19:33:48,189 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 627 [2022-12-13 19:33:48,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 162 transitions, 1789 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:48,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:48,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 627 [2022-12-13 19:33:48,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:51,653 INFO L130 PetriNetUnfolder]: 5675/8582 cut-off events. [2022-12-13 19:33:51,653 INFO L131 PetriNetUnfolder]: For 35363/35445 co-relation queries the response was YES. [2022-12-13 19:33:51,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37588 conditions, 8582 events. 5675/8582 cut-off events. For 35363/35445 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 49981 event pairs, 402 based on Foata normal form. 73/8119 useless extension candidates. Maximal degree in co-relation 37552. Up to 2344 conditions per place. [2022-12-13 19:33:51,692 INFO L137 encePairwiseOnDemand]: 611/627 looper letters, 265 selfloop transitions, 163 changer transitions 9/438 dead transitions. [2022-12-13 19:33:51,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 438 transitions, 4766 flow [2022-12-13 19:33:51,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 19:33:51,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 19:33:51,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3813 transitions. [2022-12-13 19:33:51,698 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4054226475279107 [2022-12-13 19:33:51,698 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3813 transitions. [2022-12-13 19:33:51,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3813 transitions. [2022-12-13 19:33:51,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:51,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3813 transitions. [2022-12-13 19:33:51,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 254.2) internal successors, (3813), 15 states have internal predecessors, (3813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:51,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 627.0) internal successors, (10032), 16 states have internal predecessors, (10032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:51,706 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 627.0) internal successors, (10032), 16 states have internal predecessors, (10032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:51,707 INFO L175 Difference]: Start difference. First operand has 110 places, 162 transitions, 1789 flow. Second operand 15 states and 3813 transitions. [2022-12-13 19:33:51,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 438 transitions, 4766 flow [2022-12-13 19:33:51,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 438 transitions, 4707 flow, removed 27 selfloop flow, removed 1 redundant places. [2022-12-13 19:33:51,870 INFO L231 Difference]: Finished difference. Result has 135 places, 249 transitions, 3481 flow [2022-12-13 19:33:51,870 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3481, PETRI_PLACES=135, PETRI_TRANSITIONS=249} [2022-12-13 19:33:51,871 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 97 predicate places. [2022-12-13 19:33:51,871 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 249 transitions, 3481 flow [2022-12-13 19:33:51,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:51,871 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:51,871 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:51,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 19:33:52,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:33:52,072 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:52,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:52,074 INFO L85 PathProgramCache]: Analyzing trace with hash 704548973, now seen corresponding path program 2 times [2022-12-13 19:33:52,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:52,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910626912] [2022-12-13 19:33:52,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:52,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:52,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:52,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910626912] [2022-12-13 19:33:52,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910626912] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:33:52,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873428549] [2022-12-13 19:33:52,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:33:52,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:33:52,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:33:52,494 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:33:52,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 19:33:52,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:33:52,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:33:52,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 19:33:52,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:33:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:33:52,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:33:52,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873428549] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:52,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:33:52,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-12-13 19:33:52,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937872458] [2022-12-13 19:33:52,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:52,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 19:33:52,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:52,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 19:33:52,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:33:53,238 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 627 [2022-12-13 19:33:53,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 249 transitions, 3481 flow. Second operand has 9 states, 9 states have (on average 258.55555555555554) internal successors, (2327), 9 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:53,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:53,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 627 [2022-12-13 19:33:53,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:54,606 INFO L130 PetriNetUnfolder]: 5645/8568 cut-off events. [2022-12-13 19:33:54,606 INFO L131 PetriNetUnfolder]: For 54446/54450 co-relation queries the response was YES. [2022-12-13 19:33:54,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41973 conditions, 8568 events. 5645/8568 cut-off events. For 54446/54450 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 49922 event pairs, 1179 based on Foata normal form. 4/8042 useless extension candidates. Maximal degree in co-relation 41925. Up to 4218 conditions per place. [2022-12-13 19:33:54,659 INFO L137 encePairwiseOnDemand]: 616/627 looper letters, 202 selfloop transitions, 120 changer transitions 26/349 dead transitions. [2022-12-13 19:33:54,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 349 transitions, 5026 flow [2022-12-13 19:33:54,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:33:54,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 19:33:54,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2421 transitions. [2022-12-13 19:33:54,662 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42902711323763953 [2022-12-13 19:33:54,662 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2421 transitions. [2022-12-13 19:33:54,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2421 transitions. [2022-12-13 19:33:54,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:54,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2421 transitions. [2022-12-13 19:33:54,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 269.0) internal successors, (2421), 9 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:54,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 627.0) internal successors, (6270), 10 states have internal predecessors, (6270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:54,670 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 627.0) internal successors, (6270), 10 states have internal predecessors, (6270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:54,670 INFO L175 Difference]: Start difference. First operand has 135 places, 249 transitions, 3481 flow. Second operand 9 states and 2421 transitions. [2022-12-13 19:33:54,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 349 transitions, 5026 flow [2022-12-13 19:33:54,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 349 transitions, 4904 flow, removed 60 selfloop flow, removed 1 redundant places. [2022-12-13 19:33:54,983 INFO L231 Difference]: Finished difference. Result has 146 places, 257 transitions, 3847 flow [2022-12-13 19:33:54,983 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=3385, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3847, PETRI_PLACES=146, PETRI_TRANSITIONS=257} [2022-12-13 19:33:54,983 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 108 predicate places. [2022-12-13 19:33:54,983 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 257 transitions, 3847 flow [2022-12-13 19:33:54,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 258.55555555555554) internal successors, (2327), 9 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:54,984 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:54,984 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:54,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 19:33:55,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 19:33:55,185 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:55,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:55,186 INFO L85 PathProgramCache]: Analyzing trace with hash 672071853, now seen corresponding path program 3 times [2022-12-13 19:33:55,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:55,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602581095] [2022-12-13 19:33:55,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:55,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:55,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:55,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602581095] [2022-12-13 19:33:55,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602581095] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:33:55,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008599976] [2022-12-13 19:33:55,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:33:55,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:33:55,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:33:55,654 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:33:55,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 19:33:55,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 19:33:55,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:33:55,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 19:33:55,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:33:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:33:56,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:33:56,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008599976] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:56,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:33:56,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-12-13 19:33:56,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276551802] [2022-12-13 19:33:56,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:56,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 19:33:56,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:56,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 19:33:56,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:33:56,351 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 627 [2022-12-13 19:33:56,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 257 transitions, 3847 flow. Second operand has 9 states, 9 states have (on average 258.55555555555554) internal successors, (2327), 9 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:56,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:56,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 627 [2022-12-13 19:33:56,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:33:57,753 INFO L130 PetriNetUnfolder]: 5721/8650 cut-off events. [2022-12-13 19:33:57,753 INFO L131 PetriNetUnfolder]: For 57194/57198 co-relation queries the response was YES. [2022-12-13 19:33:57,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43754 conditions, 8650 events. 5721/8650 cut-off events. For 57194/57198 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 50423 event pairs, 1071 based on Foata normal form. 9/8094 useless extension candidates. Maximal degree in co-relation 43702. Up to 3900 conditions per place. [2022-12-13 19:33:57,797 INFO L137 encePairwiseOnDemand]: 616/627 looper letters, 194 selfloop transitions, 144 changer transitions 14/353 dead transitions. [2022-12-13 19:33:57,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 353 transitions, 5333 flow [2022-12-13 19:33:57,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:33:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 19:33:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2421 transitions. [2022-12-13 19:33:57,800 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42902711323763953 [2022-12-13 19:33:57,800 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2421 transitions. [2022-12-13 19:33:57,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2421 transitions. [2022-12-13 19:33:57,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:33:57,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2421 transitions. [2022-12-13 19:33:57,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 269.0) internal successors, (2421), 9 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:57,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 627.0) internal successors, (6270), 10 states have internal predecessors, (6270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:57,804 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 627.0) internal successors, (6270), 10 states have internal predecessors, (6270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:57,804 INFO L175 Difference]: Start difference. First operand has 146 places, 257 transitions, 3847 flow. Second operand 9 states and 2421 transitions. [2022-12-13 19:33:57,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 353 transitions, 5333 flow [2022-12-13 19:33:58,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 353 transitions, 5068 flow, removed 29 selfloop flow, removed 7 redundant places. [2022-12-13 19:33:58,097 INFO L231 Difference]: Finished difference. Result has 148 places, 262 transitions, 4061 flow [2022-12-13 19:33:58,097 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=3599, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4061, PETRI_PLACES=148, PETRI_TRANSITIONS=262} [2022-12-13 19:33:58,097 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 110 predicate places. [2022-12-13 19:33:58,097 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 262 transitions, 4061 flow [2022-12-13 19:33:58,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 258.55555555555554) internal successors, (2327), 9 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:58,098 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:33:58,098 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:33:58,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 19:33:58,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 19:33:58,299 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:33:58,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:33:58,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1325998346, now seen corresponding path program 2 times [2022-12-13 19:33:58,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:33:58,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180598] [2022-12-13 19:33:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:33:58,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:33:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:33:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:33:58,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:33:58,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180598] [2022-12-13 19:33:58,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180598] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:33:58,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679028202] [2022-12-13 19:33:58,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:33:58,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:33:58,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:33:58,465 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:33:58,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 19:33:58,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:33:58,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:33:58,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 19:33:58,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:33:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:33:58,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:33:58,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679028202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:33:58,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:33:58,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2022-12-13 19:33:58,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912324466] [2022-12-13 19:33:58,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:33:58,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:33:58,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:33:58,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:33:58,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:33:59,480 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 627 [2022-12-13 19:33:59,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 262 transitions, 4061 flow. Second operand has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:33:59,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:33:59,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 627 [2022-12-13 19:33:59,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:34:01,502 INFO L130 PetriNetUnfolder]: 6862/10226 cut-off events. [2022-12-13 19:34:01,502 INFO L131 PetriNetUnfolder]: For 72712/72829 co-relation queries the response was YES. [2022-12-13 19:34:01,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51980 conditions, 10226 events. 6862/10226 cut-off events. For 72712/72829 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 59832 event pairs, 903 based on Foata normal form. 165/9689 useless extension candidates. Maximal degree in co-relation 51929. Up to 4471 conditions per place. [2022-12-13 19:34:01,584 INFO L137 encePairwiseOnDemand]: 612/627 looper letters, 252 selfloop transitions, 195 changer transitions 14/462 dead transitions. [2022-12-13 19:34:01,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 462 transitions, 7044 flow [2022-12-13 19:34:01,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:34:01,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 19:34:01,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3669 transitions. [2022-12-13 19:34:01,588 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4179767600820232 [2022-12-13 19:34:01,588 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3669 transitions. [2022-12-13 19:34:01,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3669 transitions. [2022-12-13 19:34:01,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:34:01,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3669 transitions. [2022-12-13 19:34:01,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 262.07142857142856) internal successors, (3669), 14 states have internal predecessors, (3669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:01,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 627.0) internal successors, (9405), 15 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:01,595 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 627.0) internal successors, (9405), 15 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:01,595 INFO L175 Difference]: Start difference. First operand has 148 places, 262 transitions, 4061 flow. Second operand 14 states and 3669 transitions. [2022-12-13 19:34:01,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 462 transitions, 7044 flow [2022-12-13 19:34:01,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 462 transitions, 6574 flow, removed 33 selfloop flow, removed 8 redundant places. [2022-12-13 19:34:01,914 INFO L231 Difference]: Finished difference. Result has 162 places, 341 transitions, 5540 flow [2022-12-13 19:34:01,914 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=3720, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5540, PETRI_PLACES=162, PETRI_TRANSITIONS=341} [2022-12-13 19:34:01,914 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 124 predicate places. [2022-12-13 19:34:01,914 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 341 transitions, 5540 flow [2022-12-13 19:34:01,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:01,914 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:34:01,914 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:34:01,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 19:34:02,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:34:02,116 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:34:02,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:34:02,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1381286486, now seen corresponding path program 3 times [2022-12-13 19:34:02,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:34:02,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29265481] [2022-12-13 19:34:02,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:34:02,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:34:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:34:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:34:02,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:34:02,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29265481] [2022-12-13 19:34:02,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29265481] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:34:02,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616855017] [2022-12-13 19:34:02,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:34:02,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:34:02,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:34:02,266 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:34:02,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 19:34:02,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 19:34:02,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:34:02,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 19:34:02,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:34:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:34:02,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:34:02,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616855017] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:34:02,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:34:02,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2022-12-13 19:34:02,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479883872] [2022-12-13 19:34:02,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:34:02,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:34:02,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:34:02,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:34:02,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:34:03,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 627 [2022-12-13 19:34:03,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 341 transitions, 5540 flow. Second operand has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:03,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:34:03,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 627 [2022-12-13 19:34:03,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:34:05,381 INFO L130 PetriNetUnfolder]: 6798/10105 cut-off events. [2022-12-13 19:34:05,381 INFO L131 PetriNetUnfolder]: For 81228/81330 co-relation queries the response was YES. [2022-12-13 19:34:05,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54423 conditions, 10105 events. 6798/10105 cut-off events. For 81228/81330 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 58419 event pairs, 924 based on Foata normal form. 102/9507 useless extension candidates. Maximal degree in co-relation 54364. Up to 5102 conditions per place. [2022-12-13 19:34:05,442 INFO L137 encePairwiseOnDemand]: 612/627 looper letters, 271 selfloop transitions, 172 changer transitions 6/450 dead transitions. [2022-12-13 19:34:05,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 450 transitions, 7245 flow [2022-12-13 19:34:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 19:34:05,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 19:34:05,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3149 transitions. [2022-12-13 19:34:05,444 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41852737905369486 [2022-12-13 19:34:05,445 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3149 transitions. [2022-12-13 19:34:05,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3149 transitions. [2022-12-13 19:34:05,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:34:05,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3149 transitions. [2022-12-13 19:34:05,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 262.4166666666667) internal successors, (3149), 12 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:05,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 627.0) internal successors, (8151), 13 states have internal predecessors, (8151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:05,451 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 627.0) internal successors, (8151), 13 states have internal predecessors, (8151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:05,451 INFO L175 Difference]: Start difference. First operand has 162 places, 341 transitions, 5540 flow. Second operand 12 states and 3149 transitions. [2022-12-13 19:34:05,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 450 transitions, 7245 flow [2022-12-13 19:34:05,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 450 transitions, 6942 flow, removed 109 selfloop flow, removed 3 redundant places. [2022-12-13 19:34:05,938 INFO L231 Difference]: Finished difference. Result has 173 places, 345 transitions, 5733 flow [2022-12-13 19:34:05,938 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=5232, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5733, PETRI_PLACES=173, PETRI_TRANSITIONS=345} [2022-12-13 19:34:05,938 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 135 predicate places. [2022-12-13 19:34:05,938 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 345 transitions, 5733 flow [2022-12-13 19:34:05,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:05,939 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:34:05,939 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:34:05,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 19:34:06,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:34:06,139 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:34:06,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:34:06,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1267976608, now seen corresponding path program 2 times [2022-12-13 19:34:06,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:34:06,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209247113] [2022-12-13 19:34:06,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:34:06,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:34:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:34:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:34:06,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:34:06,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209247113] [2022-12-13 19:34:06,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209247113] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:34:06,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756110078] [2022-12-13 19:34:06,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:34:06,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:34:06,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:34:06,253 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:34:06,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 19:34:06,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:34:06,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:34:06,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 19:34:06,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:34:06,734 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:34:06,734 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 119 treesize of output 84 [2022-12-13 19:34:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:34:06,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:34:06,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756110078] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:34:06,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:34:06,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 15 [2022-12-13 19:34:06,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758313706] [2022-12-13 19:34:06,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:34:06,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:34:06,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:34:06,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:34:06,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-12-13 19:34:07,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 627 [2022-12-13 19:34:07,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 345 transitions, 5733 flow. Second operand has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:07,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:34:07,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 627 [2022-12-13 19:34:07,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:34:10,189 INFO L130 PetriNetUnfolder]: 8994/13238 cut-off events. [2022-12-13 19:34:10,190 INFO L131 PetriNetUnfolder]: For 115372/115483 co-relation queries the response was YES. [2022-12-13 19:34:10,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72310 conditions, 13238 events. 8994/13238 cut-off events. For 115372/115483 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 78154 event pairs, 1448 based on Foata normal form. 183/12531 useless extension candidates. Maximal degree in co-relation 72249. Up to 7233 conditions per place. [2022-12-13 19:34:10,279 INFO L137 encePairwiseOnDemand]: 612/627 looper letters, 355 selfloop transitions, 230 changer transitions 11/597 dead transitions. [2022-12-13 19:34:10,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 597 transitions, 9818 flow [2022-12-13 19:34:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 19:34:10,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 19:34:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3440 transitions. [2022-12-13 19:34:10,282 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42203410624463256 [2022-12-13 19:34:10,282 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3440 transitions. [2022-12-13 19:34:10,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3440 transitions. [2022-12-13 19:34:10,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:34:10,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3440 transitions. [2022-12-13 19:34:10,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 264.61538461538464) internal successors, (3440), 13 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:10,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 627.0) internal successors, (8778), 14 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:10,289 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 627.0) internal successors, (8778), 14 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:10,289 INFO L175 Difference]: Start difference. First operand has 173 places, 345 transitions, 5733 flow. Second operand 13 states and 3440 transitions. [2022-12-13 19:34:10,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 597 transitions, 9818 flow [2022-12-13 19:34:11,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 597 transitions, 9342 flow, removed 9 selfloop flow, removed 8 redundant places. [2022-12-13 19:34:11,007 INFO L231 Difference]: Finished difference. Result has 186 places, 443 transitions, 7790 flow [2022-12-13 19:34:11,007 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=5406, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7790, PETRI_PLACES=186, PETRI_TRANSITIONS=443} [2022-12-13 19:34:11,007 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 148 predicate places. [2022-12-13 19:34:11,007 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 443 transitions, 7790 flow [2022-12-13 19:34:11,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:11,008 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:34:11,008 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:34:11,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 19:34:11,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 19:34:11,209 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:34:11,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:34:11,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1146372627, now seen corresponding path program 4 times [2022-12-13 19:34:11,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:34:11,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217957222] [2022-12-13 19:34:11,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:34:11,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:34:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:34:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:34:11,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:34:11,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217957222] [2022-12-13 19:34:11,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217957222] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:34:11,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202519127] [2022-12-13 19:34:11,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:34:11,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:34:11,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:34:11,648 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:34:11,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 19:34:11,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:34:11,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:34:11,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 19:34:11,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:34:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:34:12,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:34:12,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:34:12,183 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 161 treesize of output 125 [2022-12-13 19:34:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:34:13,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202519127] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:34:13,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:34:13,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 24 [2022-12-13 19:34:13,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288986017] [2022-12-13 19:34:13,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:34:13,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:34:13,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:34:13,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:34:13,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-12-13 19:34:14,293 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 627 [2022-12-13 19:34:14,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 443 transitions, 7790 flow. Second operand has 10 states, 10 states have (on average 249.3) internal successors, (2493), 10 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:14,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:34:14,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 627 [2022-12-13 19:34:14,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:34:18,728 INFO L130 PetriNetUnfolder]: 8856/13118 cut-off events. [2022-12-13 19:34:18,728 INFO L131 PetriNetUnfolder]: For 140541/140547 co-relation queries the response was YES. [2022-12-13 19:34:18,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74849 conditions, 13118 events. 8856/13118 cut-off events. For 140541/140547 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 78249 event pairs, 2386 based on Foata normal form. 128/12350 useless extension candidates. Maximal degree in co-relation 74781. Up to 4899 conditions per place. [2022-12-13 19:34:18,808 INFO L137 encePairwiseOnDemand]: 613/627 looper letters, 384 selfloop transitions, 224 changer transitions 29/638 dead transitions. [2022-12-13 19:34:18,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 638 transitions, 10809 flow [2022-12-13 19:34:18,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 19:34:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 19:34:18,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4411 transitions. [2022-12-13 19:34:18,812 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41382868937048506 [2022-12-13 19:34:18,812 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4411 transitions. [2022-12-13 19:34:18,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4411 transitions. [2022-12-13 19:34:18,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:34:18,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4411 transitions. [2022-12-13 19:34:18,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 259.47058823529414) internal successors, (4411), 17 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) [2022-12-13 19:34:18,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 627.0) internal successors, (11286), 18 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:18,822 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 627.0) internal successors, (11286), 18 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:18,822 INFO L175 Difference]: Start difference. First operand has 186 places, 443 transitions, 7790 flow. Second operand 17 states and 4411 transitions. [2022-12-13 19:34:18,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 638 transitions, 10809 flow [2022-12-13 19:34:19,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 638 transitions, 10672 flow, removed 61 selfloop flow, removed 2 redundant places. [2022-12-13 19:34:19,708 INFO L231 Difference]: Finished difference. Result has 208 places, 450 transitions, 8394 flow [2022-12-13 19:34:19,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=7677, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8394, PETRI_PLACES=208, PETRI_TRANSITIONS=450} [2022-12-13 19:34:19,708 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 170 predicate places. [2022-12-13 19:34:19,708 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 450 transitions, 8394 flow [2022-12-13 19:34:19,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 249.3) internal successors, (2493), 10 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:19,709 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:34:19,709 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:34:19,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 19:34:19,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:34:19,910 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:34:19,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:34:19,911 INFO L85 PathProgramCache]: Analyzing trace with hash 764241983, now seen corresponding path program 5 times [2022-12-13 19:34:19,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:34:19,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398289609] [2022-12-13 19:34:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:34:19,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:34:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:34:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:34:20,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:34:20,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398289609] [2022-12-13 19:34:20,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398289609] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:34:20,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433524516] [2022-12-13 19:34:20,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:34:20,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:34:20,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:34:20,311 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:34:20,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 19:34:20,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:34:20,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:34:20,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 19:34:20,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:34:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:34:20,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:34:21,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:34:21,018 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 161 treesize of output 125 [2022-12-13 19:34:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:34:21,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433524516] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:34:21,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:34:21,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-13 19:34:21,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535010261] [2022-12-13 19:34:21,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:34:21,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 19:34:21,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:34:21,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 19:34:21,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-12-13 19:34:24,143 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 627 [2022-12-13 19:34:24,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 450 transitions, 8394 flow. Second operand has 29 states, 29 states have (on average 249.3793103448276) internal successors, (7232), 29 states have internal predecessors, (7232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:24,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:34:24,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 627 [2022-12-13 19:34:24,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:34:29,726 INFO L130 PetriNetUnfolder]: 12403/18622 cut-off events. [2022-12-13 19:34:29,726 INFO L131 PetriNetUnfolder]: For 254648/254654 co-relation queries the response was YES. [2022-12-13 19:34:29,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112181 conditions, 18622 events. 12403/18622 cut-off events. For 254648/254654 co-relation queries the response was YES. Maximal size of possible extension queue 988. Compared 120167 event pairs, 3155 based on Foata normal form. 10/17282 useless extension candidates. Maximal degree in co-relation 112105. Up to 4899 conditions per place. [2022-12-13 19:34:29,875 INFO L137 encePairwiseOnDemand]: 614/627 looper letters, 635 selfloop transitions, 360 changer transitions 47/1043 dead transitions. [2022-12-13 19:34:29,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 1043 transitions, 17479 flow [2022-12-13 19:34:29,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 19:34:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 19:34:29,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 9083 transitions. [2022-12-13 19:34:29,882 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41389838231943493 [2022-12-13 19:34:29,882 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 9083 transitions. [2022-12-13 19:34:29,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 9083 transitions. [2022-12-13 19:34:29,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:34:29,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 9083 transitions. [2022-12-13 19:34:29,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 259.51428571428573) internal successors, (9083), 35 states have internal predecessors, (9083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:29,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 627.0) internal successors, (22572), 36 states have internal predecessors, (22572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:29,901 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 627.0) internal successors, (22572), 36 states have internal predecessors, (22572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:29,902 INFO L175 Difference]: Start difference. First operand has 208 places, 450 transitions, 8394 flow. Second operand 35 states and 9083 transitions. [2022-12-13 19:34:29,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 1043 transitions, 17479 flow [2022-12-13 19:34:32,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 1043 transitions, 16872 flow, removed 180 selfloop flow, removed 10 redundant places. [2022-12-13 19:34:32,378 INFO L231 Difference]: Finished difference. Result has 239 places, 586 transitions, 11688 flow [2022-12-13 19:34:32,378 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=8125, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=11688, PETRI_PLACES=239, PETRI_TRANSITIONS=586} [2022-12-13 19:34:32,379 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 201 predicate places. [2022-12-13 19:34:32,379 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 586 transitions, 11688 flow [2022-12-13 19:34:32,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 249.3793103448276) internal successors, (7232), 29 states have internal predecessors, (7232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:32,379 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:34:32,380 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:34:32,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 19:34:32,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 19:34:32,581 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:34:32,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:34:32,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1319563482, now seen corresponding path program 4 times [2022-12-13 19:34:32,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:34:32,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919145286] [2022-12-13 19:34:32,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:34:32,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:34:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:34:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:34:32,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:34:32,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919145286] [2022-12-13 19:34:32,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919145286] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:34:32,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092524912] [2022-12-13 19:34:32,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:34:32,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:34:32,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:34:32,725 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:34:32,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 19:34:32,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:34:32,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:34:32,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 19:34:32,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:34:33,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:34:33,082 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 119 treesize of output 84 [2022-12-13 19:34:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:34:33,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:34:33,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:34:33,295 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 161 treesize of output 125 [2022-12-13 19:34:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:34:33,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092524912] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:34:33,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:34:33,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2022-12-13 19:34:33,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615630432] [2022-12-13 19:34:33,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:34:33,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:34:33,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:34:33,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:34:33,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-12-13 19:34:34,388 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 627 [2022-12-13 19:34:34,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 586 transitions, 11688 flow. Second operand has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:34,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:34:34,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 627 [2022-12-13 19:34:34,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:34:39,148 INFO L130 PetriNetUnfolder]: 13483/20195 cut-off events. [2022-12-13 19:34:39,148 INFO L131 PetriNetUnfolder]: For 257689/257879 co-relation queries the response was YES. [2022-12-13 19:34:39,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124583 conditions, 20195 events. 13483/20195 cut-off events. For 257689/257879 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 131502 event pairs, 1465 based on Foata normal form. 180/18922 useless extension candidates. Maximal degree in co-relation 124502. Up to 6230 conditions per place. [2022-12-13 19:34:39,322 INFO L137 encePairwiseOnDemand]: 613/627 looper letters, 544 selfloop transitions, 287 changer transitions 18/850 dead transitions. [2022-12-13 19:34:39,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 850 transitions, 16835 flow [2022-12-13 19:34:39,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 19:34:39,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 19:34:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3282 transitions. [2022-12-13 19:34:39,326 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40264998159735 [2022-12-13 19:34:39,326 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3282 transitions. [2022-12-13 19:34:39,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3282 transitions. [2022-12-13 19:34:39,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:34:39,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3282 transitions. [2022-12-13 19:34:39,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 252.46153846153845) internal successors, (3282), 13 states have internal predecessors, (3282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:39,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 627.0) internal successors, (8778), 14 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:39,334 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 627.0) internal successors, (8778), 14 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:39,334 INFO L175 Difference]: Start difference. First operand has 239 places, 586 transitions, 11688 flow. Second operand 13 states and 3282 transitions. [2022-12-13 19:34:39,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 850 transitions, 16835 flow [2022-12-13 19:34:41,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 850 transitions, 16132 flow, removed 29 selfloop flow, removed 16 redundant places. [2022-12-13 19:34:41,957 INFO L231 Difference]: Finished difference. Result has 237 places, 636 transitions, 12961 flow [2022-12-13 19:34:41,957 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=11125, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12961, PETRI_PLACES=237, PETRI_TRANSITIONS=636} [2022-12-13 19:34:41,958 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 199 predicate places. [2022-12-13 19:34:41,958 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 636 transitions, 12961 flow [2022-12-13 19:34:41,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:41,958 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:34:41,958 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:34:41,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 19:34:42,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 19:34:42,159 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:34:42,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:34:42,160 INFO L85 PathProgramCache]: Analyzing trace with hash -570656045, now seen corresponding path program 6 times [2022-12-13 19:34:42,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:34:42,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553587846] [2022-12-13 19:34:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:34:42,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:34:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:34:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:34:42,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:34:42,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553587846] [2022-12-13 19:34:42,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553587846] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:34:42,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061754579] [2022-12-13 19:34:42,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:34:42,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:34:42,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:34:42,507 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:34:42,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 19:34:42,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-13 19:34:42,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:34:42,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 19:34:42,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:34:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:34:42,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:34:42,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061754579] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:34:42,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:34:42,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-12-13 19:34:42,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885764775] [2022-12-13 19:34:42,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:34:42,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 19:34:42,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:34:42,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 19:34:42,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:34:43,150 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 627 [2022-12-13 19:34:43,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 636 transitions, 12961 flow. Second operand has 9 states, 9 states have (on average 258.55555555555554) internal successors, (2327), 9 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:43,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:34:43,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 627 [2022-12-13 19:34:43,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:34:47,585 INFO L130 PetriNetUnfolder]: 13593/20424 cut-off events. [2022-12-13 19:34:47,585 INFO L131 PetriNetUnfolder]: For 316668/316695 co-relation queries the response was YES. [2022-12-13 19:34:47,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132461 conditions, 20424 events. 13593/20424 cut-off events. For 316668/316695 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 133886 event pairs, 3211 based on Foata normal form. 12/18916 useless extension candidates. Maximal degree in co-relation 132378. Up to 7245 conditions per place. [2022-12-13 19:34:47,772 INFO L137 encePairwiseOnDemand]: 616/627 looper letters, 330 selfloop transitions, 403 changer transitions 23/757 dead transitions. [2022-12-13 19:34:47,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 757 transitions, 15927 flow [2022-12-13 19:34:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:34:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 19:34:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2420 transitions. [2022-12-13 19:34:47,775 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42884990253411304 [2022-12-13 19:34:47,775 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2420 transitions. [2022-12-13 19:34:47,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2420 transitions. [2022-12-13 19:34:47,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:34:47,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2420 transitions. [2022-12-13 19:34:47,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 268.8888888888889) internal successors, (2420), 9 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:47,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 627.0) internal successors, (6270), 10 states have internal predecessors, (6270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:47,780 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 627.0) internal successors, (6270), 10 states have internal predecessors, (6270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:47,780 INFO L175 Difference]: Start difference. First operand has 237 places, 636 transitions, 12961 flow. Second operand 9 states and 2420 transitions. [2022-12-13 19:34:47,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 757 transitions, 15927 flow [2022-12-13 19:34:51,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 757 transitions, 15389 flow, removed 52 selfloop flow, removed 8 redundant places. [2022-12-13 19:34:51,497 INFO L231 Difference]: Finished difference. Result has 240 places, 649 transitions, 13901 flow [2022-12-13 19:34:51,498 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=12493, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13901, PETRI_PLACES=240, PETRI_TRANSITIONS=649} [2022-12-13 19:34:51,498 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 202 predicate places. [2022-12-13 19:34:51,498 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 649 transitions, 13901 flow [2022-12-13 19:34:51,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 258.55555555555554) internal successors, (2327), 9 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:51,498 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:34:51,499 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:34:51,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 19:34:51,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:34:51,700 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:34:51,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:34:51,701 INFO L85 PathProgramCache]: Analyzing trace with hash 2088890598, now seen corresponding path program 5 times [2022-12-13 19:34:51,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:34:51,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769203284] [2022-12-13 19:34:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:34:51,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:34:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:34:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:34:51,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:34:51,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769203284] [2022-12-13 19:34:51,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769203284] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:34:51,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744958305] [2022-12-13 19:34:51,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:34:51,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:34:51,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:34:51,856 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:34:51,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 19:34:51,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:34:51,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:34:51,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 19:34:51,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:34:52,225 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:34:52,225 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 116 treesize of output 81 [2022-12-13 19:34:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:34:52,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:34:52,525 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:34:52,526 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 161 treesize of output 125 [2022-12-13 19:34:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:34:53,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744958305] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:34:53,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:34:53,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2022-12-13 19:34:53,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693001916] [2022-12-13 19:34:53,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:34:53,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:34:53,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:34:53,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:34:53,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2022-12-13 19:34:54,347 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 627 [2022-12-13 19:34:54,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 649 transitions, 13901 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:34:54,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:34:54,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 627 [2022-12-13 19:34:54,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:35:00,741 INFO L130 PetriNetUnfolder]: 13894/20826 cut-off events. [2022-12-13 19:35:00,742 INFO L131 PetriNetUnfolder]: For 309195/309310 co-relation queries the response was YES. [2022-12-13 19:35:00,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139360 conditions, 20826 events. 13894/20826 cut-off events. For 309195/309310 co-relation queries the response was YES. Maximal size of possible extension queue 1092. Compared 136466 event pairs, 1339 based on Foata normal form. 104/19394 useless extension candidates. Maximal degree in co-relation 139275. Up to 6893 conditions per place. [2022-12-13 19:35:00,942 INFO L137 encePairwiseOnDemand]: 611/627 looper letters, 534 selfloop transitions, 326 changer transitions 14/875 dead transitions. [2022-12-13 19:35:00,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 875 transitions, 18495 flow [2022-12-13 19:35:00,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 19:35:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 19:35:00,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3304 transitions. [2022-12-13 19:35:00,946 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4053490369279843 [2022-12-13 19:35:00,946 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3304 transitions. [2022-12-13 19:35:00,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3304 transitions. [2022-12-13 19:35:00,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:35:00,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3304 transitions. [2022-12-13 19:35:00,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 254.15384615384616) internal successors, (3304), 13 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:00,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 627.0) internal successors, (8778), 14 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:00,952 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 627.0) internal successors, (8778), 14 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:00,952 INFO L175 Difference]: Start difference. First operand has 240 places, 649 transitions, 13901 flow. Second operand 13 states and 3304 transitions. [2022-12-13 19:35:00,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 875 transitions, 18495 flow [2022-12-13 19:35:04,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 875 transitions, 17449 flow, removed 73 selfloop flow, removed 10 redundant places. [2022-12-13 19:35:05,004 INFO L231 Difference]: Finished difference. Result has 247 places, 678 transitions, 14659 flow [2022-12-13 19:35:05,004 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=13036, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14659, PETRI_PLACES=247, PETRI_TRANSITIONS=678} [2022-12-13 19:35:05,004 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 209 predicate places. [2022-12-13 19:35:05,005 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 678 transitions, 14659 flow [2022-12-13 19:35:05,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:05,005 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:35:05,005 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:35:05,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 19:35:05,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 19:35:05,206 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:35:05,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:35:05,207 INFO L85 PathProgramCache]: Analyzing trace with hash -441540100, now seen corresponding path program 6 times [2022-12-13 19:35:05,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:35:05,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231430440] [2022-12-13 19:35:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:35:05,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:35:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:35:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:35:05,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:35:05,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231430440] [2022-12-13 19:35:05,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231430440] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:35:05,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106531292] [2022-12-13 19:35:05,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:35:05,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:35:05,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:35:05,366 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:35:05,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 19:35:05,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-13 19:35:05,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:35:05,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 19:35:05,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:35:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:35:05,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:35:05,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106531292] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:35:05,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:35:05,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2022-12-13 19:35:05,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469947388] [2022-12-13 19:35:05,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:35:05,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:35:05,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:35:05,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:35:05,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:35:06,422 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 627 [2022-12-13 19:35:06,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 678 transitions, 14659 flow. Second operand has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:06,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:35:06,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 627 [2022-12-13 19:35:06,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:35:11,359 INFO L130 PetriNetUnfolder]: 13761/20772 cut-off events. [2022-12-13 19:35:11,360 INFO L131 PetriNetUnfolder]: For 368273/368392 co-relation queries the response was YES. [2022-12-13 19:35:11,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139118 conditions, 20772 events. 13761/20772 cut-off events. For 368273/368392 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 138037 event pairs, 2189 based on Foata normal form. 152/19392 useless extension candidates. Maximal degree in co-relation 139031. Up to 10139 conditions per place. [2022-12-13 19:35:11,561 INFO L137 encePairwiseOnDemand]: 612/627 looper letters, 424 selfloop transitions, 368 changer transitions 12/805 dead transitions. [2022-12-13 19:35:11,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 805 transitions, 17595 flow [2022-12-13 19:35:11,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 19:35:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 19:35:11,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3410 transitions. [2022-12-13 19:35:11,565 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4183535762483131 [2022-12-13 19:35:11,565 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3410 transitions. [2022-12-13 19:35:11,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3410 transitions. [2022-12-13 19:35:11,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:35:11,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3410 transitions. [2022-12-13 19:35:11,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 262.3076923076923) internal successors, (3410), 13 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:11,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 627.0) internal successors, (8778), 14 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:11,571 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 627.0) internal successors, (8778), 14 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:11,571 INFO L175 Difference]: Start difference. First operand has 247 places, 678 transitions, 14659 flow. Second operand 13 states and 3410 transitions. [2022-12-13 19:35:11,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 805 transitions, 17595 flow [2022-12-13 19:35:15,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 805 transitions, 17229 flow, removed 36 selfloop flow, removed 6 redundant places. [2022-12-13 19:35:15,787 INFO L231 Difference]: Finished difference. Result has 257 places, 687 transitions, 15361 flow [2022-12-13 19:35:15,787 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=14236, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=15361, PETRI_PLACES=257, PETRI_TRANSITIONS=687} [2022-12-13 19:35:15,787 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 219 predicate places. [2022-12-13 19:35:15,787 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 687 transitions, 15361 flow [2022-12-13 19:35:15,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:15,788 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:35:15,788 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:35:15,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 19:35:15,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:35:15,989 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:35:15,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:35:15,990 INFO L85 PathProgramCache]: Analyzing trace with hash 125924258, now seen corresponding path program 7 times [2022-12-13 19:35:15,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:35:15,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012821013] [2022-12-13 19:35:15,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:35:15,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:35:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:35:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:35:16,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:35:16,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012821013] [2022-12-13 19:35:16,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012821013] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:35:16,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943150635] [2022-12-13 19:35:16,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:35:16,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:35:16,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:35:16,163 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:35:16,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 19:35:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:35:16,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 19:35:16,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:35:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:35:16,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:35:16,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:35:16,617 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 161 treesize of output 125 [2022-12-13 19:35:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:35:17,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943150635] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:35:17,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:35:17,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2022-12-13 19:35:17,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042340213] [2022-12-13 19:35:17,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:35:17,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:35:17,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:35:17,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:35:17,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-12-13 19:35:17,613 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 627 [2022-12-13 19:35:17,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 687 transitions, 15361 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:17,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:35:17,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 627 [2022-12-13 19:35:17,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:35:23,195 INFO L130 PetriNetUnfolder]: 13871/20998 cut-off events. [2022-12-13 19:35:23,195 INFO L131 PetriNetUnfolder]: For 383179/383309 co-relation queries the response was YES. [2022-12-13 19:35:23,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145038 conditions, 20998 events. 13871/20998 cut-off events. For 383179/383309 co-relation queries the response was YES. Maximal size of possible extension queue 1110. Compared 140228 event pairs, 1817 based on Foata normal form. 116/19575 useless extension candidates. Maximal degree in co-relation 144947. Up to 5743 conditions per place. [2022-12-13 19:35:23,427 INFO L137 encePairwiseOnDemand]: 613/627 looper letters, 473 selfloop transitions, 420 changer transitions 20/914 dead transitions. [2022-12-13 19:35:23,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 914 transitions, 19932 flow [2022-12-13 19:35:23,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:35:23,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 19:35:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3552 transitions. [2022-12-13 19:35:23,432 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40464798359535203 [2022-12-13 19:35:23,432 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3552 transitions. [2022-12-13 19:35:23,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3552 transitions. [2022-12-13 19:35:23,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:35:23,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3552 transitions. [2022-12-13 19:35:23,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 253.71428571428572) internal successors, (3552), 14 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:23,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 627.0) internal successors, (9405), 15 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:23,443 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 627.0) internal successors, (9405), 15 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:23,443 INFO L175 Difference]: Start difference. First operand has 257 places, 687 transitions, 15361 flow. Second operand 14 states and 3552 transitions. [2022-12-13 19:35:23,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 914 transitions, 19932 flow [2022-12-13 19:35:28,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 914 transitions, 19165 flow, removed 47 selfloop flow, removed 8 redundant places. [2022-12-13 19:35:28,075 INFO L231 Difference]: Finished difference. Result has 269 places, 717 transitions, 16746 flow [2022-12-13 19:35:28,075 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=14684, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=16746, PETRI_PLACES=269, PETRI_TRANSITIONS=717} [2022-12-13 19:35:28,075 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 231 predicate places. [2022-12-13 19:35:28,075 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 717 transitions, 16746 flow [2022-12-13 19:35:28,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:28,076 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:35:28,076 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:35:28,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 19:35:28,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:35:28,277 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:35:28,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:35:28,277 INFO L85 PathProgramCache]: Analyzing trace with hash 995270610, now seen corresponding path program 3 times [2022-12-13 19:35:28,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:35:28,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824948422] [2022-12-13 19:35:28,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:35:28,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:35:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:35:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:35:28,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:35:28,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824948422] [2022-12-13 19:35:28,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824948422] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:35:28,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160119166] [2022-12-13 19:35:28,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:35:28,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:35:28,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:35:28,477 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:35:28,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 19:35:28,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 19:35:28,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:35:28,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 19:35:28,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:35:28,798 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:35:28,798 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 116 treesize of output 81 [2022-12-13 19:35:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:35:28,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:35:28,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160119166] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:35:28,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:35:28,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 15 [2022-12-13 19:35:28,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25732854] [2022-12-13 19:35:28,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:35:28,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 19:35:28,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:35:28,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 19:35:28,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-12-13 19:35:29,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 627 [2022-12-13 19:35:29,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 717 transitions, 16746 flow. Second operand has 11 states, 11 states have (on average 255.0909090909091) internal successors, (2806), 11 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:29,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:35:29,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 627 [2022-12-13 19:35:29,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:35:34,899 INFO L130 PetriNetUnfolder]: 13830/20960 cut-off events. [2022-12-13 19:35:34,900 INFO L131 PetriNetUnfolder]: For 421970/422068 co-relation queries the response was YES. [2022-12-13 19:35:35,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147157 conditions, 20960 events. 13830/20960 cut-off events. For 421970/422068 co-relation queries the response was YES. Maximal size of possible extension queue 1106. Compared 139797 event pairs, 2475 based on Foata normal form. 97/19524 useless extension candidates. Maximal degree in co-relation 147060. Up to 11424 conditions per place. [2022-12-13 19:35:35,196 INFO L137 encePairwiseOnDemand]: 614/627 looper letters, 522 selfloop transitions, 322 changer transitions 13/858 dead transitions. [2022-12-13 19:35:35,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 858 transitions, 20005 flow [2022-12-13 19:35:35,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 19:35:35,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 19:35:35,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3205 transitions. [2022-12-13 19:35:35,198 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42597022860180755 [2022-12-13 19:35:35,199 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3205 transitions. [2022-12-13 19:35:35,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3205 transitions. [2022-12-13 19:35:35,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:35:35,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3205 transitions. [2022-12-13 19:35:35,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 267.0833333333333) internal successors, (3205), 12 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:35,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 627.0) internal successors, (8151), 13 states have internal predecessors, (8151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:35,204 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 627.0) internal successors, (8151), 13 states have internal predecessors, (8151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:35,204 INFO L175 Difference]: Start difference. First operand has 269 places, 717 transitions, 16746 flow. Second operand 12 states and 3205 transitions. [2022-12-13 19:35:35,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 858 transitions, 20005 flow [2022-12-13 19:35:41,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 858 transitions, 19665 flow, removed 33 selfloop flow, removed 7 redundant places. [2022-12-13 19:35:41,136 INFO L231 Difference]: Finished difference. Result has 272 places, 713 transitions, 17004 flow [2022-12-13 19:35:41,136 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=16416, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17004, PETRI_PLACES=272, PETRI_TRANSITIONS=713} [2022-12-13 19:35:41,137 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 234 predicate places. [2022-12-13 19:35:41,137 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 713 transitions, 17004 flow [2022-12-13 19:35:41,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 255.0909090909091) internal successors, (2806), 11 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:41,138 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:35:41,138 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:35:41,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 19:35:41,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:35:41,338 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:35:41,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:35:41,339 INFO L85 PathProgramCache]: Analyzing trace with hash -234068282, now seen corresponding path program 4 times [2022-12-13 19:35:41,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:35:41,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112610044] [2022-12-13 19:35:41,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:35:41,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:35:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:35:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:35:41,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:35:41,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112610044] [2022-12-13 19:35:41,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112610044] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:35:41,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984109468] [2022-12-13 19:35:41,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:35:41,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:35:41,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:35:41,553 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:35:41,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 19:35:41,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:35:41,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:35:41,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 19:35:41,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:35:42,017 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:35:42,018 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 119 treesize of output 84 [2022-12-13 19:35:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:35:42,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:35:42,175 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:35:42,175 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 161 treesize of output 125 [2022-12-13 19:35:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:35:43,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984109468] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:35:43,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:35:43,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2022-12-13 19:35:43,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389361190] [2022-12-13 19:35:43,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:35:43,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:35:43,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:35:43,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:35:43,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2022-12-13 19:35:44,088 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 627 [2022-12-13 19:35:44,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 713 transitions, 17004 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:44,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:35:44,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 627 [2022-12-13 19:35:44,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:35:53,724 INFO L130 PetriNetUnfolder]: 18258/27517 cut-off events. [2022-12-13 19:35:53,724 INFO L131 PetriNetUnfolder]: For 560293/560492 co-relation queries the response was YES. [2022-12-13 19:35:54,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198175 conditions, 27517 events. 18258/27517 cut-off events. For 560293/560492 co-relation queries the response was YES. Maximal size of possible extension queue 1539. Compared 190909 event pairs, 1303 based on Foata normal form. 194/25671 useless extension candidates. Maximal degree in co-relation 198078. Up to 7684 conditions per place. [2022-12-13 19:35:54,149 INFO L137 encePairwiseOnDemand]: 611/627 looper letters, 676 selfloop transitions, 422 changer transitions 28/1127 dead transitions. [2022-12-13 19:35:54,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 1127 transitions, 26915 flow [2022-12-13 19:35:54,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:35:54,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 19:35:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3554 transitions. [2022-12-13 19:35:54,153 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4048758259284575 [2022-12-13 19:35:54,153 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3554 transitions. [2022-12-13 19:35:54,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3554 transitions. [2022-12-13 19:35:54,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:35:54,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3554 transitions. [2022-12-13 19:35:54,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 253.85714285714286) internal successors, (3554), 14 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:54,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 627.0) internal successors, (9405), 15 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:54,161 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 627.0) internal successors, (9405), 15 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:35:54,161 INFO L175 Difference]: Start difference. First operand has 272 places, 713 transitions, 17004 flow. Second operand 14 states and 3554 transitions. [2022-12-13 19:35:54,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 1127 transitions, 26915 flow [2022-12-13 19:36:03,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 1127 transitions, 25872 flow, removed 15 selfloop flow, removed 12 redundant places. [2022-12-13 19:36:03,762 INFO L231 Difference]: Finished difference. Result has 280 places, 841 transitions, 21106 flow [2022-12-13 19:36:03,762 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=16276, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=21106, PETRI_PLACES=280, PETRI_TRANSITIONS=841} [2022-12-13 19:36:03,763 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 242 predicate places. [2022-12-13 19:36:03,763 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 841 transitions, 21106 flow [2022-12-13 19:36:03,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:03,763 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:03,763 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:36:03,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 19:36:03,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 19:36:03,964 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:36:03,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:03,965 INFO L85 PathProgramCache]: Analyzing trace with hash -166944752, now seen corresponding path program 8 times [2022-12-13 19:36:03,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:36:03,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41830011] [2022-12-13 19:36:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:03,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:36:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:36:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:36:04,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:36:04,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41830011] [2022-12-13 19:36:04,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41830011] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:36:04,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105435915] [2022-12-13 19:36:04,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:36:04,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:36:04,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:36:04,129 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:36:04,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 19:36:04,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:36:04,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:36:04,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 19:36:04,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:36:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:36:04,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:36:04,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105435915] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:36:04,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:36:04,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2022-12-13 19:36:04,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793049450] [2022-12-13 19:36:04,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:36:04,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:36:04,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:36:04,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:36:04,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:36:05,044 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 627 [2022-12-13 19:36:05,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 841 transitions, 21106 flow. Second operand has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:05,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:36:05,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 627 [2022-12-13 19:36:05,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:36:12,895 INFO L130 PetriNetUnfolder]: 18243/27516 cut-off events. [2022-12-13 19:36:12,895 INFO L131 PetriNetUnfolder]: For 679978/680097 co-relation queries the response was YES. [2022-12-13 19:36:13,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207188 conditions, 27516 events. 18243/27516 cut-off events. For 679978/680097 co-relation queries the response was YES. Maximal size of possible extension queue 1540. Compared 191285 event pairs, 2687 based on Foata normal form. 112/25596 useless extension candidates. Maximal degree in co-relation 207085. Up to 14649 conditions per place. [2022-12-13 19:36:13,200 INFO L137 encePairwiseOnDemand]: 613/627 looper letters, 499 selfloop transitions, 468 changer transitions 15/983 dead transitions. [2022-12-13 19:36:13,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 983 transitions, 24722 flow [2022-12-13 19:36:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:36:13,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 19:36:13,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3674 transitions. [2022-12-13 19:36:13,204 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41854636591478694 [2022-12-13 19:36:13,204 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3674 transitions. [2022-12-13 19:36:13,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3674 transitions. [2022-12-13 19:36:13,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:36:13,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3674 transitions. [2022-12-13 19:36:13,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 262.42857142857144) internal successors, (3674), 14 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:13,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 627.0) internal successors, (9405), 15 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:13,211 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 627.0) internal successors, (9405), 15 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:13,211 INFO L175 Difference]: Start difference. First operand has 280 places, 841 transitions, 21106 flow. Second operand 14 states and 3674 transitions. [2022-12-13 19:36:13,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 983 transitions, 24722 flow [2022-12-13 19:36:24,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 983 transitions, 24284 flow, removed 138 selfloop flow, removed 7 redundant places. [2022-12-13 19:36:24,614 INFO L231 Difference]: Finished difference. Result has 289 places, 849 transitions, 21937 flow [2022-12-13 19:36:24,615 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=20754, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=21937, PETRI_PLACES=289, PETRI_TRANSITIONS=849} [2022-12-13 19:36:24,615 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 251 predicate places. [2022-12-13 19:36:24,615 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 849 transitions, 21937 flow [2022-12-13 19:36:24,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:24,616 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:24,616 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:36:24,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 19:36:24,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 19:36:24,816 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:36:24,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:24,817 INFO L85 PathProgramCache]: Analyzing trace with hash -944148636, now seen corresponding path program 9 times [2022-12-13 19:36:24,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:36:24,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031700628] [2022-12-13 19:36:24,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:24,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:36:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:36:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:36:24,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:36:24,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031700628] [2022-12-13 19:36:24,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031700628] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:36:24,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937423634] [2022-12-13 19:36:24,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:36:24,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:36:24,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:36:24,962 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:36:24,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 19:36:25,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 19:36:25,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:36:25,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 19:36:25,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:36:25,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:36:25,342 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 119 treesize of output 84 [2022-12-13 19:36:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:36:25,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:36:25,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937423634] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:36:25,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:36:25,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2022-12-13 19:36:25,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802411682] [2022-12-13 19:36:25,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:36:25,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:36:25,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:36:25,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:36:25,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:36:25,938 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 627 [2022-12-13 19:36:25,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 849 transitions, 21937 flow. Second operand has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:25,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:36:25,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 627 [2022-12-13 19:36:25,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:36:34,149 INFO L130 PetriNetUnfolder]: 18360/27756 cut-off events. [2022-12-13 19:36:34,150 INFO L131 PetriNetUnfolder]: For 682576/682778 co-relation queries the response was YES. [2022-12-13 19:36:34,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210215 conditions, 27756 events. 18360/27756 cut-off events. For 682576/682778 co-relation queries the response was YES. Maximal size of possible extension queue 1586. Compared 194255 event pairs, 2710 based on Foata normal form. 191/25874 useless extension candidates. Maximal degree in co-relation 210111. Up to 13472 conditions per place. [2022-12-13 19:36:34,474 INFO L137 encePairwiseOnDemand]: 612/627 looper letters, 477 selfloop transitions, 511 changer transitions 25/1014 dead transitions. [2022-12-13 19:36:34,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 1014 transitions, 25672 flow [2022-12-13 19:36:34,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 19:36:34,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 19:36:34,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4454 transitions. [2022-12-13 19:36:34,479 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4178628389154705 [2022-12-13 19:36:34,479 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4454 transitions. [2022-12-13 19:36:34,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4454 transitions. [2022-12-13 19:36:34,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:36:34,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4454 transitions. [2022-12-13 19:36:34,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 262.0) internal successors, (4454), 17 states have internal predecessors, (4454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:34,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 627.0) internal successors, (11286), 18 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:34,487 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 627.0) internal successors, (11286), 18 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:34,487 INFO L175 Difference]: Start difference. First operand has 289 places, 849 transitions, 21937 flow. Second operand 17 states and 4454 transitions. [2022-12-13 19:36:34,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 1014 transitions, 25672 flow [2022-12-13 19:36:45,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1014 transitions, 24944 flow, removed 26 selfloop flow, removed 6 redundant places. [2022-12-13 19:36:45,240 INFO L231 Difference]: Finished difference. Result has 303 places, 856 transitions, 22465 flow [2022-12-13 19:36:45,241 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=21217, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=22465, PETRI_PLACES=303, PETRI_TRANSITIONS=856} [2022-12-13 19:36:45,241 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 265 predicate places. [2022-12-13 19:36:45,241 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 856 transitions, 22465 flow [2022-12-13 19:36:45,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:45,242 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:36:45,242 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:36:45,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 19:36:45,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 19:36:45,442 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:36:45,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:36:45,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1828499598, now seen corresponding path program 10 times [2022-12-13 19:36:45,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:36:45,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590763122] [2022-12-13 19:36:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:36:45,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:36:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:36:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:36:45,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:36:45,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590763122] [2022-12-13 19:36:45,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590763122] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:36:45,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9640810] [2022-12-13 19:36:45,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:36:45,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:36:45,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:36:45,572 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:36:45,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 19:36:45,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:36:45,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:36:45,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 19:36:45,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:36:45,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:36:45,920 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 119 treesize of output 84 [2022-12-13 19:36:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:36:45,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:36:46,146 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:36:46,147 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 161 treesize of output 125 [2022-12-13 19:36:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:36:46,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9640810] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:36:46,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:36:46,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2022-12-13 19:36:46,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296814629] [2022-12-13 19:36:46,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:36:46,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:36:46,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:36:46,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:36:46,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-12-13 19:36:47,220 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 627 [2022-12-13 19:36:47,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 856 transitions, 22465 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:47,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:36:47,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 627 [2022-12-13 19:36:47,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:36:55,738 INFO L130 PetriNetUnfolder]: 18477/27934 cut-off events. [2022-12-13 19:36:55,739 INFO L131 PetriNetUnfolder]: For 698616/698738 co-relation queries the response was YES. [2022-12-13 19:36:55,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213580 conditions, 27934 events. 18477/27934 cut-off events. For 698616/698738 co-relation queries the response was YES. Maximal size of possible extension queue 1556. Compared 194944 event pairs, 2257 based on Foata normal form. 109/26004 useless extension candidates. Maximal degree in co-relation 213472. Up to 8236 conditions per place. [2022-12-13 19:36:56,087 INFO L137 encePairwiseOnDemand]: 613/627 looper letters, 502 selfloop transitions, 531 changer transitions 23/1057 dead transitions. [2022-12-13 19:36:56,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1057 transitions, 27020 flow [2022-12-13 19:36:56,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:36:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 19:36:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3548 transitions. [2022-12-13 19:36:56,090 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40419229892914105 [2022-12-13 19:36:56,090 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3548 transitions. [2022-12-13 19:36:56,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3548 transitions. [2022-12-13 19:36:56,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:36:56,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3548 transitions. [2022-12-13 19:36:56,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 253.42857142857142) internal successors, (3548), 14 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:56,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 627.0) internal successors, (9405), 15 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:56,101 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 627.0) internal successors, (9405), 15 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:36:56,101 INFO L175 Difference]: Start difference. First operand has 303 places, 856 transitions, 22465 flow. Second operand 14 states and 3548 transitions. [2022-12-13 19:36:56,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1057 transitions, 27020 flow [2022-12-13 19:37:08,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1057 transitions, 26356 flow, removed 74 selfloop flow, removed 10 redundant places. [2022-12-13 19:37:08,921 INFO L231 Difference]: Finished difference. Result has 310 places, 865 transitions, 23548 flow [2022-12-13 19:37:08,921 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=21881, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=856, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=522, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=23548, PETRI_PLACES=310, PETRI_TRANSITIONS=865} [2022-12-13 19:37:08,922 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 272 predicate places. [2022-12-13 19:37:08,922 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 865 transitions, 23548 flow [2022-12-13 19:37:08,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:37:08,922 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:37:08,922 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:37:08,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-13 19:37:09,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 19:37:09,124 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:37:09,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:37:09,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1348062074, now seen corresponding path program 5 times [2022-12-13 19:37:09,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:37:09,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199656213] [2022-12-13 19:37:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:37:09,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:37:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:37:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:37:09,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:37:09,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199656213] [2022-12-13 19:37:09,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199656213] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:37:09,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423719621] [2022-12-13 19:37:09,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:37:09,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:37:09,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:37:09,276 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:37:09,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 19:37:09,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:37:09,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:37:09,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 19:37:09,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:37:09,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:37:09,603 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 82 [2022-12-13 19:37:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:37:09,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:37:09,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:37:09,931 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 161 treesize of output 125 [2022-12-13 19:37:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:37:10,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423719621] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:37:10,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:37:10,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2022-12-13 19:37:10,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590740068] [2022-12-13 19:37:10,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:37:10,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:37:10,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:37:10,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:37:10,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-12-13 19:37:10,991 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 627 [2022-12-13 19:37:10,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 865 transitions, 23548 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:37:10,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:37:10,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 627 [2022-12-13 19:37:10,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:37:20,236 INFO L130 PetriNetUnfolder]: 18496/27978 cut-off events. [2022-12-13 19:37:20,236 INFO L131 PetriNetUnfolder]: For 715101/715301 co-relation queries the response was YES. [2022-12-13 19:37:20,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218776 conditions, 27978 events. 18496/27978 cut-off events. For 715101/715301 co-relation queries the response was YES. Maximal size of possible extension queue 1563. Compared 195607 event pairs, 1915 based on Foata normal form. 188/26126 useless extension candidates. Maximal degree in co-relation 218664. Up to 9190 conditions per place. [2022-12-13 19:37:20,622 INFO L137 encePairwiseOnDemand]: 610/627 looper letters, 456 selfloop transitions, 578 changer transitions 21/1056 dead transitions. [2022-12-13 19:37:20,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 1056 transitions, 27794 flow [2022-12-13 19:37:20,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 19:37:20,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 19:37:20,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4029 transitions. [2022-12-13 19:37:20,625 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40161483253588515 [2022-12-13 19:37:20,625 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4029 transitions. [2022-12-13 19:37:20,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4029 transitions. [2022-12-13 19:37:20,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:37:20,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4029 transitions. [2022-12-13 19:37:20,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 251.8125) internal successors, (4029), 16 states have internal predecessors, (4029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:37:20,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 627.0) internal successors, (10659), 17 states have internal predecessors, (10659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:37:20,634 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 627.0) internal successors, (10659), 17 states have internal predecessors, (10659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:37:20,634 INFO L175 Difference]: Start difference. First operand has 310 places, 865 transitions, 23548 flow. Second operand 16 states and 4029 transitions. [2022-12-13 19:37:20,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 1056 transitions, 27794 flow [2022-12-13 19:37:32,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1056 transitions, 26992 flow, removed 32 selfloop flow, removed 9 redundant places. [2022-12-13 19:37:33,005 INFO L231 Difference]: Finished difference. Result has 320 places, 870 transitions, 24390 flow [2022-12-13 19:37:33,006 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=22752, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=570, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=24390, PETRI_PLACES=320, PETRI_TRANSITIONS=870} [2022-12-13 19:37:33,006 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 282 predicate places. [2022-12-13 19:37:33,006 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 870 transitions, 24390 flow [2022-12-13 19:37:33,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:37:33,006 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:37:33,006 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:37:33,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 19:37:33,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 19:37:33,208 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:37:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:37:33,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1488572196, now seen corresponding path program 6 times [2022-12-13 19:37:33,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:37:33,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779468212] [2022-12-13 19:37:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:37:33,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:37:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:37:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:37:33,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:37:33,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779468212] [2022-12-13 19:37:33,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779468212] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:37:33,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016638209] [2022-12-13 19:37:33,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:37:33,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:37:33,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:37:33,367 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:37:33,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 19:37:33,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-13 19:37:33,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:37:33,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 19:37:33,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:37:33,794 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:37:33,794 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 119 treesize of output 84 [2022-12-13 19:37:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:37:33,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:37:33,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016638209] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:37:33,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:37:33,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2022-12-13 19:37:33,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007118219] [2022-12-13 19:37:33,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:37:33,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:37:33,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:37:33,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:37:33,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:37:34,315 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 627 [2022-12-13 19:37:34,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 870 transitions, 24390 flow. Second operand has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:37:34,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:37:34,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 627 [2022-12-13 19:37:34,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:37:42,880 INFO L130 PetriNetUnfolder]: 17640/26950 cut-off events. [2022-12-13 19:37:42,881 INFO L131 PetriNetUnfolder]: For 771773/771987 co-relation queries the response was YES. [2022-12-13 19:37:43,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212311 conditions, 26950 events. 17640/26950 cut-off events. For 771773/771987 co-relation queries the response was YES. Maximal size of possible extension queue 1559. Compared 191639 event pairs, 3059 based on Foata normal form. 465/25382 useless extension candidates. Maximal degree in co-relation 212195. Up to 16058 conditions per place. [2022-12-13 19:37:43,222 INFO L137 encePairwiseOnDemand]: 612/627 looper letters, 628 selfloop transitions, 444 changer transitions 24/1097 dead transitions. [2022-12-13 19:37:43,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1097 transitions, 29197 flow [2022-12-13 19:37:43,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 19:37:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 19:37:43,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4750 transitions. [2022-12-13 19:37:43,226 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4208754208754209 [2022-12-13 19:37:43,226 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4750 transitions. [2022-12-13 19:37:43,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4750 transitions. [2022-12-13 19:37:43,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:37:43,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4750 transitions. [2022-12-13 19:37:43,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 263.8888888888889) internal successors, (4750), 18 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:37:43,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 627.0) internal successors, (11913), 19 states have internal predecessors, (11913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:37:43,236 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 627.0) internal successors, (11913), 19 states have internal predecessors, (11913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:37:43,236 INFO L175 Difference]: Start difference. First operand has 320 places, 870 transitions, 24390 flow. Second operand 18 states and 4750 transitions. [2022-12-13 19:37:43,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1097 transitions, 29197 flow [2022-12-13 19:37:55,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1097 transitions, 28266 flow, removed 60 selfloop flow, removed 11 redundant places. [2022-12-13 19:37:55,047 INFO L231 Difference]: Finished difference. Result has 332 places, 899 transitions, 25200 flow [2022-12-13 19:37:55,047 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=23219, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=25200, PETRI_PLACES=332, PETRI_TRANSITIONS=899} [2022-12-13 19:37:55,047 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 294 predicate places. [2022-12-13 19:37:55,047 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 899 transitions, 25200 flow [2022-12-13 19:37:55,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:37:55,048 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:37:55,048 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:37:55,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-13 19:37:55,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 19:37:55,249 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:37:55,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:37:55,250 INFO L85 PathProgramCache]: Analyzing trace with hash -858317668, now seen corresponding path program 11 times [2022-12-13 19:37:55,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:37:55,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75761745] [2022-12-13 19:37:55,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:37:55,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:37:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:37:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:37:55,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:37:55,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75761745] [2022-12-13 19:37:55,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75761745] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:37:55,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386180752] [2022-12-13 19:37:55,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:37:55,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:37:55,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:37:55,387 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:37:55,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 19:37:55,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:37:55,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:37:55,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 19:37:55,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:37:55,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:37:55,783 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 119 treesize of output 84 [2022-12-13 19:37:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:37:55,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:37:55,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:37:55,994 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 161 treesize of output 125 [2022-12-13 19:37:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:37:57,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386180752] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:37:57,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:37:57,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2022-12-13 19:37:57,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445560681] [2022-12-13 19:37:57,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:37:57,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:37:57,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:37:57,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:37:57,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-12-13 19:37:58,172 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 627 [2022-12-13 19:37:58,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 899 transitions, 25200 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:37:58,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:37:58,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 627 [2022-12-13 19:37:58,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:38:08,220 INFO L130 PetriNetUnfolder]: 17910/27264 cut-off events. [2022-12-13 19:38:08,220 INFO L131 PetriNetUnfolder]: For 790626/790802 co-relation queries the response was YES. [2022-12-13 19:38:08,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221653 conditions, 27264 events. 17910/27264 cut-off events. For 790626/790802 co-relation queries the response was YES. Maximal size of possible extension queue 1541. Compared 191973 event pairs, 1827 based on Foata normal form. 163/25365 useless extension candidates. Maximal degree in co-relation 221533. Up to 8822 conditions per place. [2022-12-13 19:38:08,571 INFO L137 encePairwiseOnDemand]: 611/627 looper letters, 503 selfloop transitions, 586 changer transitions 19/1109 dead transitions. [2022-12-13 19:38:08,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1109 transitions, 30219 flow [2022-12-13 19:38:08,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:38:08,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 19:38:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3563 transitions. [2022-12-13 19:38:08,575 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4059011164274322 [2022-12-13 19:38:08,575 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3563 transitions. [2022-12-13 19:38:08,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3563 transitions. [2022-12-13 19:38:08,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:38:08,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3563 transitions. [2022-12-13 19:38:08,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 254.5) internal successors, (3563), 14 states have internal predecessors, (3563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:38:08,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 627.0) internal successors, (9405), 15 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:38:08,583 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 627.0) internal successors, (9405), 15 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:38:08,583 INFO L175 Difference]: Start difference. First operand has 332 places, 899 transitions, 25200 flow. Second operand 14 states and 3563 transitions. [2022-12-13 19:38:08,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1109 transitions, 30219 flow [2022-12-13 19:38:22,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 1109 transitions, 29601 flow, removed 51 selfloop flow, removed 5 redundant places. [2022-12-13 19:38:22,718 INFO L231 Difference]: Finished difference. Result has 345 places, 914 transitions, 26616 flow [2022-12-13 19:38:22,718 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=24634, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=570, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=26616, PETRI_PLACES=345, PETRI_TRANSITIONS=914} [2022-12-13 19:38:22,718 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 307 predicate places. [2022-12-13 19:38:22,718 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 914 transitions, 26616 flow [2022-12-13 19:38:22,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:38:22,719 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:38:22,719 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:38:22,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-13 19:38:22,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:38:22,920 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:38:22,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:38:22,921 INFO L85 PathProgramCache]: Analyzing trace with hash -434036660, now seen corresponding path program 7 times [2022-12-13 19:38:22,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:38:22,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669435944] [2022-12-13 19:38:22,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:38:22,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:38:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:38:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:38:23,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:38:23,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669435944] [2022-12-13 19:38:23,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669435944] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:38:23,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948249010] [2022-12-13 19:38:23,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:38:23,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:38:23,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:38:23,082 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:38:23,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 19:38:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:38:23,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 19:38:23,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:38:23,385 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:38:23,385 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 111 treesize of output 76 [2022-12-13 19:38:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:38:23,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:38:23,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:38:23,859 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 161 treesize of output 125 [2022-12-13 19:38:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:38:24,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948249010] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:38:24,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:38:24,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2022-12-13 19:38:24,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875034070] [2022-12-13 19:38:24,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:38:24,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:38:24,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:38:24,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:38:24,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2022-12-13 19:38:25,262 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 627 [2022-12-13 19:38:25,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 914 transitions, 26616 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:38:25,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:38:25,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 627 [2022-12-13 19:38:25,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:38:36,360 INFO L130 PetriNetUnfolder]: 18490/28128 cut-off events. [2022-12-13 19:38:36,360 INFO L131 PetriNetUnfolder]: For 883656/883847 co-relation queries the response was YES. [2022-12-13 19:38:36,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231738 conditions, 28128 events. 18490/28128 cut-off events. For 883656/883847 co-relation queries the response was YES. Maximal size of possible extension queue 1610. Compared 199415 event pairs, 1473 based on Foata normal form. 178/26184 useless extension candidates. Maximal degree in co-relation 231613. Up to 8882 conditions per place. [2022-12-13 19:38:36,747 INFO L137 encePairwiseOnDemand]: 610/627 looper letters, 480 selfloop transitions, 658 changer transitions 19/1158 dead transitions. [2022-12-13 19:38:36,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1158 transitions, 32384 flow [2022-12-13 19:38:36,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 19:38:36,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 19:38:36,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4301 transitions. [2022-12-13 19:38:36,754 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40350877192982454 [2022-12-13 19:38:36,754 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4301 transitions. [2022-12-13 19:38:36,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4301 transitions. [2022-12-13 19:38:36,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:38:36,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4301 transitions. [2022-12-13 19:38:36,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 253.0) internal successors, (4301), 17 states have internal predecessors, (4301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:38:36,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 627.0) internal successors, (11286), 18 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:38:36,768 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 627.0) internal successors, (11286), 18 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:38:36,768 INFO L175 Difference]: Start difference. First operand has 345 places, 914 transitions, 26616 flow. Second operand 17 states and 4301 transitions. [2022-12-13 19:38:36,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1158 transitions, 32384 flow [2022-12-13 19:38:52,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1158 transitions, 31415 flow, removed 70 selfloop flow, removed 10 redundant places. [2022-12-13 19:38:52,275 INFO L231 Difference]: Finished difference. Result has 356 places, 966 transitions, 28702 flow [2022-12-13 19:38:52,275 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=25698, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=609, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=28702, PETRI_PLACES=356, PETRI_TRANSITIONS=966} [2022-12-13 19:38:52,275 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 318 predicate places. [2022-12-13 19:38:52,276 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 966 transitions, 28702 flow [2022-12-13 19:38:52,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:38:52,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:38:52,276 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:38:52,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 19:38:52,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:38:52,477 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:38:52,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:38:52,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1451724616, now seen corresponding path program 12 times [2022-12-13 19:38:52,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:38:52,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805584404] [2022-12-13 19:38:52,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:38:52,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:38:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:38:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:38:52,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:38:52,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805584404] [2022-12-13 19:38:52,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805584404] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:38:52,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141949139] [2022-12-13 19:38:52,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:38:52,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:38:52,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:38:52,618 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:38:52,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 19:38:52,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-13 19:38:52,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:38:52,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 19:38:52,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:38:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:38:53,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:38:53,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141949139] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:38:53,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:38:53,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2022-12-13 19:38:53,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491364385] [2022-12-13 19:38:53,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:38:53,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:38:53,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:38:53,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:38:53,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:38:53,838 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 627 [2022-12-13 19:38:53,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 966 transitions, 28702 flow. Second operand has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:38:53,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:38:53,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 627 [2022-12-13 19:38:53,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:39:03,207 INFO L130 PetriNetUnfolder]: 18285/27963 cut-off events. [2022-12-13 19:39:03,207 INFO L131 PetriNetUnfolder]: For 959642/959821 co-relation queries the response was YES. [2022-12-13 19:39:03,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236443 conditions, 27963 events. 18285/27963 cut-off events. For 959642/959821 co-relation queries the response was YES. Maximal size of possible extension queue 1584. Compared 198721 event pairs, 2656 based on Foata normal form. 256/26101 useless extension candidates. Maximal degree in co-relation 236315. Up to 13546 conditions per place. [2022-12-13 19:39:03,677 INFO L137 encePairwiseOnDemand]: 612/627 looper letters, 526 selfloop transitions, 552 changer transitions 30/1109 dead transitions. [2022-12-13 19:39:03,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1109 transitions, 32370 flow [2022-12-13 19:39:03,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 19:39:03,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 19:39:03,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4448 transitions. [2022-12-13 19:39:03,680 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4172999343277981 [2022-12-13 19:39:03,680 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4448 transitions. [2022-12-13 19:39:03,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4448 transitions. [2022-12-13 19:39:03,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:39:03,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4448 transitions. [2022-12-13 19:39:03,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 261.6470588235294) internal successors, (4448), 17 states have internal predecessors, (4448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:39:03,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 627.0) internal successors, (11286), 18 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:39:03,690 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 627.0) internal successors, (11286), 18 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:39:03,690 INFO L175 Difference]: Start difference. First operand has 356 places, 966 transitions, 28702 flow. Second operand 17 states and 4448 transitions. [2022-12-13 19:39:03,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1109 transitions, 32370 flow [2022-12-13 19:39:19,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1109 transitions, 31112 flow, removed 99 selfloop flow, removed 11 redundant places. [2022-12-13 19:39:19,821 INFO L231 Difference]: Finished difference. Result has 364 places, 957 transitions, 28446 flow [2022-12-13 19:39:19,822 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=27357, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=962, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=28446, PETRI_PLACES=364, PETRI_TRANSITIONS=957} [2022-12-13 19:39:19,822 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 326 predicate places. [2022-12-13 19:39:19,822 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 957 transitions, 28446 flow [2022-12-13 19:39:19,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:39:19,822 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:39:19,822 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:39:19,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 19:39:20,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:39:20,024 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:39:20,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:39:20,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2042836058, now seen corresponding path program 8 times [2022-12-13 19:39:20,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:39:20,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760868606] [2022-12-13 19:39:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:39:20,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:39:20,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:39:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:39:20,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:39:20,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760868606] [2022-12-13 19:39:20,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760868606] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:39:20,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704694506] [2022-12-13 19:39:20,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:39:20,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:39:20,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:39:20,186 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:39:20,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 19:39:20,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:39:20,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:39:20,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 19:39:20,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:39:20,620 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:39:20,621 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 116 treesize of output 81 [2022-12-13 19:39:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:39:20,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:39:20,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704694506] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:39:20,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:39:20,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2022-12-13 19:39:20,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801973604] [2022-12-13 19:39:20,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:39:20,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:39:20,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:39:20,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:39:20,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:39:21,144 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 627 [2022-12-13 19:39:21,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 957 transitions, 28446 flow. Second operand has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:39:21,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:39:21,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 627 [2022-12-13 19:39:21,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:39:30,460 INFO L130 PetriNetUnfolder]: 18216/27799 cut-off events. [2022-12-13 19:39:30,460 INFO L131 PetriNetUnfolder]: For 1046072/1046272 co-relation queries the response was YES. [2022-12-13 19:39:30,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240513 conditions, 27799 events. 18216/27799 cut-off events. For 1046072/1046272 co-relation queries the response was YES. Maximal size of possible extension queue 1573. Compared 197068 event pairs, 2916 based on Foata normal form. 196/25879 useless extension candidates. Maximal degree in co-relation 240382. Up to 17140 conditions per place. [2022-12-13 19:39:30,861 INFO L137 encePairwiseOnDemand]: 613/627 looper letters, 658 selfloop transitions, 471 changer transitions 13/1143 dead transitions. [2022-12-13 19:39:30,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1143 transitions, 33255 flow [2022-12-13 19:39:30,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 19:39:30,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 19:39:30,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4462 transitions. [2022-12-13 19:39:30,865 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41861337836570034 [2022-12-13 19:39:30,865 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4462 transitions. [2022-12-13 19:39:30,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4462 transitions. [2022-12-13 19:39:30,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:39:30,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4462 transitions. [2022-12-13 19:39:30,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 262.47058823529414) internal successors, (4462), 17 states have internal predecessors, (4462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:39:30,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 627.0) internal successors, (11286), 18 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:39:30,874 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 627.0) internal successors, (11286), 18 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:39:30,874 INFO L175 Difference]: Start difference. First operand has 364 places, 957 transitions, 28446 flow. Second operand 17 states and 4462 transitions. [2022-12-13 19:39:30,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1143 transitions, 33255 flow [2022-12-13 19:39:47,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1143 transitions, 32243 flow, removed 14 selfloop flow, removed 12 redundant places. [2022-12-13 19:39:47,153 INFO L231 Difference]: Finished difference. Result has 368 places, 974 transitions, 28899 flow [2022-12-13 19:39:47,154 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=27481, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=28899, PETRI_PLACES=368, PETRI_TRANSITIONS=974} [2022-12-13 19:39:47,154 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 330 predicate places. [2022-12-13 19:39:47,154 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 974 transitions, 28899 flow [2022-12-13 19:39:47,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:39:47,154 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:39:47,154 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:39:47,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 19:39:47,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-13 19:39:47,356 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:39:47,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:39:47,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1851782564, now seen corresponding path program 9 times [2022-12-13 19:39:47,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:39:47,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628639856] [2022-12-13 19:39:47,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:39:47,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:39:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:39:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:39:47,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:39:47,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628639856] [2022-12-13 19:39:47,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628639856] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:39:47,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892671761] [2022-12-13 19:39:47,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:39:47,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:39:47,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:39:47,489 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:39:47,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 19:39:47,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 19:39:47,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:39:47,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 19:39:47,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:39:47,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:39:47,872 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 82 [2022-12-13 19:39:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:39:47,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:39:47,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892671761] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:39:47,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:39:47,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2022-12-13 19:39:47,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056212908] [2022-12-13 19:39:47,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:39:47,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:39:47,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:39:47,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:39:47,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:39:48,449 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 627 [2022-12-13 19:39:48,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 974 transitions, 28899 flow. Second operand has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:39:48,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:39:48,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 627 [2022-12-13 19:39:48,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:39:57,917 INFO L130 PetriNetUnfolder]: 18390/28116 cut-off events. [2022-12-13 19:39:57,917 INFO L131 PetriNetUnfolder]: For 1051271/1051485 co-relation queries the response was YES. [2022-12-13 19:39:58,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240870 conditions, 28116 events. 18390/28116 cut-off events. For 1051271/1051485 co-relation queries the response was YES. Maximal size of possible extension queue 1634. Compared 201016 event pairs, 3217 based on Foata normal form. 201/26158 useless extension candidates. Maximal degree in co-relation 240739. Up to 15810 conditions per place. [2022-12-13 19:39:58,347 INFO L137 encePairwiseOnDemand]: 613/627 looper letters, 654 selfloop transitions, 511 changer transitions 22/1188 dead transitions. [2022-12-13 19:39:58,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 1188 transitions, 34169 flow [2022-12-13 19:39:58,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 19:39:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 19:39:58,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4742 transitions. [2022-12-13 19:39:58,351 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4201665780613149 [2022-12-13 19:39:58,351 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4742 transitions. [2022-12-13 19:39:58,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4742 transitions. [2022-12-13 19:39:58,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:39:58,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4742 transitions. [2022-12-13 19:39:58,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 263.44444444444446) internal successors, (4742), 18 states have internal predecessors, (4742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:39:58,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 627.0) internal successors, (11913), 19 states have internal predecessors, (11913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:39:58,361 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 627.0) internal successors, (11913), 19 states have internal predecessors, (11913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:39:58,361 INFO L175 Difference]: Start difference. First operand has 368 places, 974 transitions, 28899 flow. Second operand 18 states and 4742 transitions. [2022-12-13 19:39:58,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 1188 transitions, 34169 flow [2022-12-13 19:40:15,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1188 transitions, 33417 flow, removed 35 selfloop flow, removed 8 redundant places. [2022-12-13 19:40:15,853 INFO L231 Difference]: Finished difference. Result has 379 places, 988 transitions, 29806 flow [2022-12-13 19:40:15,853 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=28165, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=974, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=29806, PETRI_PLACES=379, PETRI_TRANSITIONS=988} [2022-12-13 19:40:15,853 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 341 predicate places. [2022-12-13 19:40:15,853 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 988 transitions, 29806 flow [2022-12-13 19:40:15,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:40:15,854 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:40:15,854 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:40:15,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 19:40:16,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-12-13 19:40:16,055 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:40:16,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:40:16,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1511311296, now seen corresponding path program 13 times [2022-12-13 19:40:16,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:40:16,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986478287] [2022-12-13 19:40:16,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:40:16,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:40:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:40:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:40:16,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:40:16,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986478287] [2022-12-13 19:40:16,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986478287] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:40:16,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253551371] [2022-12-13 19:40:16,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:40:16,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:40:16,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:40:16,211 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:40:16,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 19:40:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:40:16,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 19:40:16,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:40:16,577 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:40:16,577 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 111 treesize of output 76 [2022-12-13 19:40:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:40:16,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:40:17,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:40:17,170 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 161 treesize of output 125 [2022-12-13 19:40:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:40:18,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253551371] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:40:18,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:40:18,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2022-12-13 19:40:18,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887029757] [2022-12-13 19:40:18,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:40:18,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:40:18,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:40:18,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:40:18,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-12-13 19:40:18,757 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 627 [2022-12-13 19:40:18,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 988 transitions, 29806 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:40:18,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:40:18,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 627 [2022-12-13 19:40:18,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:40:29,899 INFO L130 PetriNetUnfolder]: 18352/28058 cut-off events. [2022-12-13 19:40:29,900 INFO L131 PetriNetUnfolder]: For 1018136/1018243 co-relation queries the response was YES. [2022-12-13 19:40:30,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240171 conditions, 28058 events. 18352/28058 cut-off events. For 1018136/1018243 co-relation queries the response was YES. Maximal size of possible extension queue 1615. Compared 200144 event pairs, 1471 based on Foata normal form. 95/25983 useless extension candidates. Maximal degree in co-relation 240040. Up to 8954 conditions per place. [2022-12-13 19:40:30,284 INFO L137 encePairwiseOnDemand]: 611/627 looper letters, 490 selfloop transitions, 663 changer transitions 21/1175 dead transitions. [2022-12-13 19:40:30,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 1175 transitions, 34292 flow [2022-12-13 19:40:30,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 19:40:30,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 19:40:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4062 transitions. [2022-12-13 19:40:30,287 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4049043062200957 [2022-12-13 19:40:30,287 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4062 transitions. [2022-12-13 19:40:30,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4062 transitions. [2022-12-13 19:40:30,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:40:30,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4062 transitions. [2022-12-13 19:40:30,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 253.875) internal successors, (4062), 16 states have internal predecessors, (4062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:40:30,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 627.0) internal successors, (10659), 17 states have internal predecessors, (10659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:40:30,296 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 627.0) internal successors, (10659), 17 states have internal predecessors, (10659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:40:30,296 INFO L175 Difference]: Start difference. First operand has 379 places, 988 transitions, 29806 flow. Second operand 16 states and 4062 transitions. [2022-12-13 19:40:30,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 1175 transitions, 34292 flow [2022-12-13 19:40:48,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1175 transitions, 33611 flow, removed 79 selfloop flow, removed 13 redundant places. [2022-12-13 19:40:48,253 INFO L231 Difference]: Finished difference. Result has 384 places, 989 transitions, 30638 flow [2022-12-13 19:40:48,253 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=29142, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=988, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=658, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=30638, PETRI_PLACES=384, PETRI_TRANSITIONS=989} [2022-12-13 19:40:48,254 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 346 predicate places. [2022-12-13 19:40:48,254 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 989 transitions, 30638 flow [2022-12-13 19:40:48,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:40:48,254 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:40:48,254 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:40:48,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 19:40:48,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-13 19:40:48,455 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:40:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:40:48,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1202853436, now seen corresponding path program 14 times [2022-12-13 19:40:48,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:40:48,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66657291] [2022-12-13 19:40:48,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:40:48,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:40:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:40:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:40:48,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:40:48,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66657291] [2022-12-13 19:40:48,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66657291] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:40:48,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869264993] [2022-12-13 19:40:48,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:40:48,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:40:48,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:40:48,608 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:40:48,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 19:40:48,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:40:48,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:40:48,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 19:40:48,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:40:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:40:49,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:40:49,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869264993] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:40:49,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:40:49,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2022-12-13 19:40:49,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535011992] [2022-12-13 19:40:49,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:40:49,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:40:49,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:40:49,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:40:49,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:40:49,597 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 627 [2022-12-13 19:40:49,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 989 transitions, 30638 flow. Second operand has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:40:49,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:40:49,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 627 [2022-12-13 19:40:49,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:40:59,081 INFO L130 PetriNetUnfolder]: 18328/27998 cut-off events. [2022-12-13 19:40:59,081 INFO L131 PetriNetUnfolder]: For 1040101/1040280 co-relation queries the response was YES. [2022-12-13 19:40:59,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244314 conditions, 27998 events. 18328/27998 cut-off events. For 1040101/1040280 co-relation queries the response was YES. Maximal size of possible extension queue 1620. Compared 199484 event pairs, 2717 based on Foata normal form. 172/26008 useless extension candidates. Maximal degree in co-relation 244179. Up to 15004 conditions per place. [2022-12-13 19:40:59,489 INFO L137 encePairwiseOnDemand]: 613/627 looper letters, 582 selfloop transitions, 529 changer transitions 10/1122 dead transitions. [2022-12-13 19:40:59,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 1122 transitions, 34159 flow [2022-12-13 19:40:59,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 19:40:59,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 19:40:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4186 transitions. [2022-12-13 19:40:59,492 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41726475279106856 [2022-12-13 19:40:59,492 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4186 transitions. [2022-12-13 19:40:59,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4186 transitions. [2022-12-13 19:40:59,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:40:59,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4186 transitions. [2022-12-13 19:40:59,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 261.625) internal successors, (4186), 16 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:40:59,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 627.0) internal successors, (10659), 17 states have internal predecessors, (10659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:40:59,501 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 627.0) internal successors, (10659), 17 states have internal predecessors, (10659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:40:59,501 INFO L175 Difference]: Start difference. First operand has 384 places, 989 transitions, 30638 flow. Second operand 16 states and 4186 transitions. [2022-12-13 19:40:59,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 1122 transitions, 34159 flow [2022-12-13 19:41:17,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1122 transitions, 32930 flow, removed 6 selfloop flow, removed 12 redundant places. [2022-12-13 19:41:17,304 INFO L231 Difference]: Finished difference. Result has 387 places, 988 transitions, 30458 flow [2022-12-13 19:41:17,304 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=29427, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=989, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=529, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=30458, PETRI_PLACES=387, PETRI_TRANSITIONS=988} [2022-12-13 19:41:17,304 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 349 predicate places. [2022-12-13 19:41:17,304 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 988 transitions, 30458 flow [2022-12-13 19:41:17,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:41:17,305 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:41:17,305 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:41:17,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 19:41:17,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-13 19:41:17,506 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:41:17,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:41:17,507 INFO L85 PathProgramCache]: Analyzing trace with hash -544345910, now seen corresponding path program 15 times [2022-12-13 19:41:17,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:41:17,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644769084] [2022-12-13 19:41:17,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:41:17,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:41:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:41:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:41:17,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:41:17,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644769084] [2022-12-13 19:41:17,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644769084] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:41:17,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181522795] [2022-12-13 19:41:17,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:41:17,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:41:17,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:41:17,643 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:41:17,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 19:41:17,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 19:41:17,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:41:17,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 19:41:17,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:41:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:41:18,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:41:18,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181522795] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:41:18,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:41:18,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 15 [2022-12-13 19:41:18,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088726209] [2022-12-13 19:41:18,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:41:18,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 19:41:18,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:41:18,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 19:41:18,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-12-13 19:41:18,583 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 627 [2022-12-13 19:41:18,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 988 transitions, 30458 flow. Second operand has 11 states, 11 states have (on average 252.0909090909091) internal successors, (2773), 11 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:41:18,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:41:18,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 627 [2022-12-13 19:41:18,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:41:28,227 INFO L130 PetriNetUnfolder]: 18229/27921 cut-off events. [2022-12-13 19:41:28,227 INFO L131 PetriNetUnfolder]: For 1041533/1041628 co-relation queries the response was YES. [2022-12-13 19:41:28,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243481 conditions, 27921 events. 18229/27921 cut-off events. For 1041533/1041628 co-relation queries the response was YES. Maximal size of possible extension queue 1606. Compared 199452 event pairs, 2729 based on Foata normal form. 117/25876 useless extension candidates. Maximal degree in co-relation 243346. Up to 14135 conditions per place. [2022-12-13 19:41:28,635 INFO L137 encePairwiseOnDemand]: 612/627 looper letters, 571 selfloop transitions, 566 changer transitions 11/1149 dead transitions. [2022-12-13 19:41:28,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 1149 transitions, 34481 flow [2022-12-13 19:41:28,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 19:41:28,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 19:41:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4710 transitions. [2022-12-13 19:41:28,639 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.417331206804891 [2022-12-13 19:41:28,639 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4710 transitions. [2022-12-13 19:41:28,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4710 transitions. [2022-12-13 19:41:28,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:41:28,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4710 transitions. [2022-12-13 19:41:28,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 261.6666666666667) internal successors, (4710), 18 states have internal predecessors, (4710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:41:28,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 627.0) internal successors, (11913), 19 states have internal predecessors, (11913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:41:28,648 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 627.0) internal successors, (11913), 19 states have internal predecessors, (11913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:41:28,648 INFO L175 Difference]: Start difference. First operand has 387 places, 988 transitions, 30458 flow. Second operand 18 states and 4710 transitions. [2022-12-13 19:41:28,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 1149 transitions, 34481 flow [2022-12-13 19:41:46,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1149 transitions, 33472 flow, removed 8 selfloop flow, removed 11 redundant places. [2022-12-13 19:41:46,351 INFO L231 Difference]: Finished difference. Result has 402 places, 1004 transitions, 31219 flow [2022-12-13 19:41:46,352 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=29347, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=985, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=31219, PETRI_PLACES=402, PETRI_TRANSITIONS=1004} [2022-12-13 19:41:46,352 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 364 predicate places. [2022-12-13 19:41:46,352 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 1004 transitions, 31219 flow [2022-12-13 19:41:46,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 252.0909090909091) internal successors, (2773), 11 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:41:46,353 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:41:46,353 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:41:46,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-13 19:41:46,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 19:41:46,554 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:41:46,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:41:46,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1775045488, now seen corresponding path program 16 times [2022-12-13 19:41:46,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:41:46,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825111943] [2022-12-13 19:41:46,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:41:46,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:41:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:41:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:41:46,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:41:46,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825111943] [2022-12-13 19:41:46,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825111943] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:41:46,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659193707] [2022-12-13 19:41:46,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:41:46,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:41:46,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:41:46,723 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:41:46,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 19:41:46,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:41:46,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:41:46,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 19:41:46,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:41:47,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:41:47,118 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 116 treesize of output 81 [2022-12-13 19:41:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:41:47,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:41:47,476 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:41:47,476 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 161 treesize of output 125 [2022-12-13 19:41:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:41:48,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659193707] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:41:48,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:41:48,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2022-12-13 19:41:48,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991884259] [2022-12-13 19:41:48,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:41:48,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:41:48,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:41:48,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:41:48,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-12-13 19:41:48,670 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 627 [2022-12-13 19:41:48,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 1004 transitions, 31219 flow. Second operand has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:41:48,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:41:48,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 627 [2022-12-13 19:41:48,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:41:59,067 INFO L130 PetriNetUnfolder]: 18289/27978 cut-off events. [2022-12-13 19:41:59,067 INFO L131 PetriNetUnfolder]: For 1039692/1039906 co-relation queries the response was YES. [2022-12-13 19:41:59,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245290 conditions, 27978 events. 18289/27978 cut-off events. For 1039692/1039906 co-relation queries the response was YES. Maximal size of possible extension queue 1629. Compared 199853 event pairs, 1943 based on Foata normal form. 201/25994 useless extension candidates. Maximal degree in co-relation 245147. Up to 7000 conditions per place. [2022-12-13 19:41:59,595 INFO L137 encePairwiseOnDemand]: 613/627 looper letters, 818 selfloop transitions, 425 changer transitions 25/1269 dead transitions. [2022-12-13 19:41:59,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 1269 transitions, 38645 flow [2022-12-13 19:41:59,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:41:59,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 19:41:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3541 transitions. [2022-12-13 19:41:59,599 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4033948507632718 [2022-12-13 19:41:59,600 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3541 transitions. [2022-12-13 19:41:59,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3541 transitions. [2022-12-13 19:41:59,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:41:59,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3541 transitions. [2022-12-13 19:41:59,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 252.92857142857142) internal successors, (3541), 14 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:41:59,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 627.0) internal successors, (9405), 15 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:41:59,610 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 627.0) internal successors, (9405), 15 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:41:59,610 INFO L175 Difference]: Start difference. First operand has 402 places, 1004 transitions, 31219 flow. Second operand 14 states and 3541 transitions. [2022-12-13 19:41:59,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 1269 transitions, 38645 flow [2022-12-13 19:42:19,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 1269 transitions, 37498 flow, removed 47 selfloop flow, removed 8 redundant places. [2022-12-13 19:42:19,557 INFO L231 Difference]: Finished difference. Result has 413 places, 1022 transitions, 32007 flow [2022-12-13 19:42:19,557 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=30231, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1004, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=32007, PETRI_PLACES=413, PETRI_TRANSITIONS=1022} [2022-12-13 19:42:19,558 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 375 predicate places. [2022-12-13 19:42:19,558 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 1022 transitions, 32007 flow [2022-12-13 19:42:19,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:42:19,558 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:42:19,558 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:42:19,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 19:42:19,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:42:19,759 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:42:19,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:42:19,760 INFO L85 PathProgramCache]: Analyzing trace with hash 258094808, now seen corresponding path program 17 times [2022-12-13 19:42:19,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:42:19,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635508631] [2022-12-13 19:42:19,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:42:19,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:42:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:42:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:42:19,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:42:19,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635508631] [2022-12-13 19:42:19,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635508631] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:42:19,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766061973] [2022-12-13 19:42:19,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:42:19,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:42:19,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:42:19,895 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:42:19,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 19:42:19,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:42:19,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:42:19,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 19:42:19,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:42:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:42:20,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:42:20,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:42:20,449 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 161 treesize of output 125 [2022-12-13 19:42:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:42:21,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766061973] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:42:21,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:42:21,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 10] total 25 [2022-12-13 19:42:21,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850979865] [2022-12-13 19:42:21,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:42:21,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:42:21,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:42:21,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:42:21,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-12-13 19:42:21,772 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 627 [2022-12-13 19:42:21,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 1022 transitions, 32007 flow. Second operand has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:42:21,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:42:21,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 627 [2022-12-13 19:42:21,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:42:34,003 INFO L130 PetriNetUnfolder]: 19045/29171 cut-off events. [2022-12-13 19:42:34,003 INFO L131 PetriNetUnfolder]: For 1122331/1122545 co-relation queries the response was YES. [2022-12-13 19:42:34,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260100 conditions, 29171 events. 19045/29171 cut-off events. For 1122331/1122545 co-relation queries the response was YES. Maximal size of possible extension queue 1662. Compared 209488 event pairs, 2001 based on Foata normal form. 202/27124 useless extension candidates. Maximal degree in co-relation 259952. Up to 7000 conditions per place. [2022-12-13 19:42:34,578 INFO L137 encePairwiseOnDemand]: 613/627 looper letters, 730 selfloop transitions, 539 changer transitions 34/1304 dead transitions. [2022-12-13 19:42:34,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 1304 transitions, 39792 flow [2022-12-13 19:42:34,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 19:42:34,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 19:42:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4044 transitions. [2022-12-13 19:42:34,583 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40311004784689 [2022-12-13 19:42:34,583 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4044 transitions. [2022-12-13 19:42:34,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4044 transitions. [2022-12-13 19:42:34,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:42:34,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4044 transitions. [2022-12-13 19:42:34,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 252.75) internal successors, (4044), 16 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:42:34,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 627.0) internal successors, (10659), 17 states have internal predecessors, (10659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:42:34,592 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 627.0) internal successors, (10659), 17 states have internal predecessors, (10659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:42:34,592 INFO L175 Difference]: Start difference. First operand has 413 places, 1022 transitions, 32007 flow. Second operand 16 states and 4044 transitions. [2022-12-13 19:42:34,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 1304 transitions, 39792 flow [2022-12-13 19:42:57,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 1304 transitions, 39506 flow, removed 43 selfloop flow, removed 6 redundant places. [2022-12-13 19:42:57,313 INFO L231 Difference]: Finished difference. Result has 429 places, 1073 transitions, 35184 flow [2022-12-13 19:42:57,313 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=31743, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=487, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=35184, PETRI_PLACES=429, PETRI_TRANSITIONS=1073} [2022-12-13 19:42:57,313 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 391 predicate places. [2022-12-13 19:42:57,313 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 1073 transitions, 35184 flow [2022-12-13 19:42:57,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:42:57,314 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:42:57,314 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:42:57,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-13 19:42:57,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-13 19:42:57,515 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:42:57,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:42:57,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1879983222, now seen corresponding path program 18 times [2022-12-13 19:42:57,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:42:57,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561191778] [2022-12-13 19:42:57,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:42:57,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:42:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:42:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:42:57,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:42:57,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561191778] [2022-12-13 19:42:57,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561191778] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:42:57,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446613221] [2022-12-13 19:42:57,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:42:57,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:42:57,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:42:57,694 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:42:57,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 19:42:57,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-13 19:42:57,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:42:57,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 19:42:57,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:42:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:42:58,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:42:58,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446613221] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:42:58,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:42:58,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 16 [2022-12-13 19:42:58,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271264662] [2022-12-13 19:42:58,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:42:58,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:42:58,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:42:58,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:42:58,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:42:58,762 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 627 [2022-12-13 19:42:58,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 1073 transitions, 35184 flow. Second operand has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:42:58,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:42:58,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 627 [2022-12-13 19:42:58,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:09,597 INFO L130 PetriNetUnfolder]: 18982/29019 cut-off events. [2022-12-13 19:43:09,597 INFO L131 PetriNetUnfolder]: For 1286006/1286193 co-relation queries the response was YES. [2022-12-13 19:43:09,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269615 conditions, 29019 events. 18982/29019 cut-off events. For 1286006/1286193 co-relation queries the response was YES. Maximal size of possible extension queue 1641. Compared 207028 event pairs, 2927 based on Foata normal form. 164/26904 useless extension candidates. Maximal degree in co-relation 269461. Up to 14816 conditions per place. [2022-12-13 19:43:10,083 INFO L137 encePairwiseOnDemand]: 613/627 looper letters, 597 selfloop transitions, 583 changer transitions 16/1197 dead transitions. [2022-12-13 19:43:10,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1197 transitions, 39111 flow [2022-12-13 19:43:10,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:43:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 19:43:10,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3669 transitions. [2022-12-13 19:43:10,087 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4179767600820232 [2022-12-13 19:43:10,087 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3669 transitions. [2022-12-13 19:43:10,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3669 transitions. [2022-12-13 19:43:10,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:10,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3669 transitions. [2022-12-13 19:43:10,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 262.07142857142856) internal successors, (3669), 14 states have internal predecessors, (3669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:10,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 627.0) internal successors, (9405), 15 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:10,094 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 627.0) internal successors, (9405), 15 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:10,094 INFO L175 Difference]: Start difference. First operand has 429 places, 1073 transitions, 35184 flow. Second operand 14 states and 3669 transitions. [2022-12-13 19:43:10,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1197 transitions, 39111 flow [2022-12-13 19:43:39,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1197 transitions, 38283 flow, removed 127 selfloop flow, removed 9 redundant places. [2022-12-13 19:43:39,425 INFO L231 Difference]: Finished difference. Result has 434 places, 1072 transitions, 35543 flow [2022-12-13 19:43:39,425 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=34402, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=583, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=35543, PETRI_PLACES=434, PETRI_TRANSITIONS=1072} [2022-12-13 19:43:39,425 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 396 predicate places. [2022-12-13 19:43:39,425 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 1072 transitions, 35543 flow [2022-12-13 19:43:39,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 251.91666666666666) internal successors, (3023), 12 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:39,426 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:39,426 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:43:39,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-13 19:43:39,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:39,627 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:43:39,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:39,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1094781968, now seen corresponding path program 10 times [2022-12-13 19:43:39,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:39,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203294520] [2022-12-13 19:43:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:39,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:39,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:39,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203294520] [2022-12-13 19:43:39,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203294520] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:39,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329363616] [2022-12-13 19:43:39,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:43:39,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:39,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:39,770 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:43:39,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 19:43:39,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:43:39,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:43:39,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 19:43:39,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:43:40,093 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:43:40,093 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 111 treesize of output 76 [2022-12-13 19:43:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:40,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:43:40,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:43:40,672 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 161 treesize of output 125 [2022-12-13 19:43:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:43:41,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329363616] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:41,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:43:41,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 11] total 24 [2022-12-13 19:43:41,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776724215] [2022-12-13 19:43:41,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:43:41,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:43:41,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:41,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:43:41,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-12-13 19:43:41,481 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 627 [2022-12-13 19:43:41,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 1072 transitions, 35543 flow. Second operand has 8 states, 8 states have (on average 259.875) internal successors, (2079), 8 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:41,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:41,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 627 [2022-12-13 19:43:41,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:44:06,308 INFO L130 PetriNetUnfolder]: 40814/62315 cut-off events. [2022-12-13 19:44:06,308 INFO L131 PetriNetUnfolder]: For 2807407/2807705 co-relation queries the response was YES. [2022-12-13 19:44:07,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569511 conditions, 62315 events. 40814/62315 cut-off events. For 2807407/2807705 co-relation queries the response was YES. Maximal size of possible extension queue 3321. Compared 490513 event pairs, 4476 based on Foata normal form. 287/57754 useless extension candidates. Maximal degree in co-relation 569357. Up to 24208 conditions per place. [2022-12-13 19:44:07,638 INFO L137 encePairwiseOnDemand]: 614/627 looper letters, 1510 selfloop transitions, 1410 changer transitions 24/2945 dead transitions. [2022-12-13 19:44:07,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 2945 transitions, 102502 flow [2022-12-13 19:44:07,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 19:44:07,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 19:44:07,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4886 transitions. [2022-12-13 19:44:07,643 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4329257487152224 [2022-12-13 19:44:07,643 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4886 transitions. [2022-12-13 19:44:07,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4886 transitions. [2022-12-13 19:44:07,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:44:07,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4886 transitions. [2022-12-13 19:44:07,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 271.44444444444446) internal successors, (4886), 18 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:07,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 627.0) internal successors, (11913), 19 states have internal predecessors, (11913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:07,653 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 627.0) internal successors, (11913), 19 states have internal predecessors, (11913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:07,653 INFO L175 Difference]: Start difference. First operand has 434 places, 1072 transitions, 35543 flow. Second operand 18 states and 4886 transitions. [2022-12-13 19:44:07,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 2945 transitions, 102502 flow [2022-12-13 19:45:32,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 2945 transitions, 99441 flow, removed 23 selfloop flow, removed 12 redundant places. [2022-12-13 19:45:32,760 INFO L231 Difference]: Finished difference. Result has 454 places, 2202 transitions, 79964 flow [2022-12-13 19:45:32,761 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=627, PETRI_DIFFERENCE_MINUEND_FLOW=34402, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1072, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=79964, PETRI_PLACES=454, PETRI_TRANSITIONS=2202} [2022-12-13 19:45:32,761 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 416 predicate places. [2022-12-13 19:45:32,761 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 2202 transitions, 79964 flow [2022-12-13 19:45:32,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 259.875) internal successors, (2079), 8 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:32,762 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:45:32,762 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:45:32,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-13 19:45:32,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:45:32,963 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:45:32,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:32,964 INFO L85 PathProgramCache]: Analyzing trace with hash 922204026, now seen corresponding path program 11 times [2022-12-13 19:45:32,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:32,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725522431] [2022-12-13 19:45:32,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:32,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:33,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:33,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725522431] [2022-12-13 19:45:33,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725522431] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:45:33,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302881577] [2022-12-13 19:45:33,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:45:33,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:45:33,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:45:33,129 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:45:33,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ffb97e0-56ca-4a6c-8614-3643927c2bdb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 19:45:33,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:45:33,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:45:33,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 19:45:33,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:45:33,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:45:33,491 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 111 treesize of output 76 [2022-12-13 19:45:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:33,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:45:34,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:45:34,052 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 161 treesize of output 125 [2022-12-13 19:45:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:45:34,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302881577] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:45:34,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:45:34,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 11] total 26 [2022-12-13 19:45:34,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477081464] [2022-12-13 19:45:34,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:45:34,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:45:34,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:34,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:45:34,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-12-13 19:45:35,560 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 627 [2022-12-13 19:45:35,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 2202 transitions, 79964 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:35,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:45:35,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 627 [2022-12-13 19:45:35,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand