./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0 --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 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:42:25,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:42:25,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:42:25,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:42:25,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:42:25,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:42:25,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:42:25,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:42:25,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:42:25,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:42:25,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:42:25,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:42:25,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:42:25,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:42:25,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:42:25,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:42:25,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:42:25,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:42:25,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:42:25,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:42:25,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:42:25,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:42:25,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:42:25,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:42:25,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:42:25,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:42:25,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:42:25,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:42:25,352 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:42:25,353 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:42:25,354 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:42:25,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:42:25,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:42:25,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:42:25,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:42:25,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:42:25,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:42:25,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:42:25,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:42:25,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:42:25,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:42:25,361 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:42:25,387 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:42:25,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:42:25,388 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:42:25,391 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:42:25,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:42:25,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:42:25,393 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:42:25,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:42:25,393 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:42:25,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:42:25,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:42:25,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:42:25,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:42:25,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:42:25,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:42:25,394 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:42:25,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:42:25,395 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:42:25,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:42:25,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:42:25,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:42:25,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:42:25,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:42:25,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:42:25,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:42:25,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:42:25,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:42:25,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:42:25,397 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:42:25,397 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:42:25,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:42:25,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:42:25,398 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2021-11-22 14:42:25,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:42:25,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:42:25,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:42:25,748 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:42:25,749 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:42:25,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2021-11-22 14:42:25,821 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/data/e11b07224/09d3112963454da983e5415f16da0a25/FLAG261813098 [2021-11-22 14:42:26,273 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:42:26,274 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2021-11-22 14:42:26,280 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/data/e11b07224/09d3112963454da983e5415f16da0a25/FLAG261813098 [2021-11-22 14:42:26,641 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/data/e11b07224/09d3112963454da983e5415f16da0a25 [2021-11-22 14:42:26,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:42:26,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:42:26,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:42:26,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:42:26,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:42:26,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:42:26" (1/1) ... [2021-11-22 14:42:26,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b0bffc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26, skipping insertion in model container [2021-11-22 14:42:26,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:42:26" (1/1) ... [2021-11-22 14:42:26,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:42:26,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:42:26,869 WARN L230 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_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2021-11-22 14:42:26,872 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:42:26,880 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:42:26,899 WARN L230 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_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2021-11-22 14:42:26,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:42:26,917 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:42:26,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26 WrapperNode [2021-11-22 14:42:26,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:42:26,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:42:26,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:42:26,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:42:26,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2021-11-22 14:42:26,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2021-11-22 14:42:26,951 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2021-11-22 14:42:26,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:42:26,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:42:26,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:42:26,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:42:26,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2021-11-22 14:42:26,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2021-11-22 14:42:26,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2021-11-22 14:42:26,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2021-11-22 14:42:26,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2021-11-22 14:42:26,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2021-11-22 14:42:26,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2021-11-22 14:42:27,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:42:27,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:42:27,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:42:27,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:42:27,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2021-11-22 14:42:27,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:42:27,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:27,041 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:42:27,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:42:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:42:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-22 14:42:27,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-22 14:42:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-22 14:42:27,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-22 14:42:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:42:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 14:42:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 14:42:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-22 14:42:27,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-22 14:42:27,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:42:27,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:42:27,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 14:42:27,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 14:42:27,098 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-22 14:42:27,204 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:42:27,206 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:42:27,420 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:42:27,459 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:42:27,459 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-22 14:42:27,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:42:27 BoogieIcfgContainer [2021-11-22 14:42:27,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:42:27,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:42:27,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:42:27,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:42:27,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:42:26" (1/3) ... [2021-11-22 14:42:27,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a584e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:42:27, skipping insertion in model container [2021-11-22 14:42:27,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (2/3) ... [2021-11-22 14:42:27,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a584e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:42:27, skipping insertion in model container [2021-11-22 14:42:27,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:42:27" (3/3) ... [2021-11-22 14:42:27,471 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2021-11-22 14:42:27,476 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-22 14:42:27,476 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:42:27,476 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 14:42:27,477 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-22 14:42:27,524 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,524 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,524 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,525 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,525 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,525 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,525 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,526 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,526 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,526 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,526 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,526 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,527 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,527 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,527 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,527 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,527 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,528 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,528 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,528 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,528 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,528 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,529 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,529 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,529 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,530 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,530 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,530 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,530 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,530 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,531 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,531 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,531 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,531 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,531 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,532 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,532 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,532 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,532 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,533 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,533 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,533 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,533 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,533 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,534 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,534 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,534 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,534 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,537 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,537 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,538 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,538 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,538 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,538 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,538 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,540 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,540 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,540 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,540 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,540 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:42:27,543 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-22 14:42:27,594 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:42:27,602 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 14:42:27,602 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-22 14:42:27,615 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 170 flow [2021-11-22 14:42:27,657 INFO L129 PetriNetUnfolder]: 5/75 cut-off events. [2021-11-22 14:42:27,658 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-22 14:42:27,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 5/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2021-11-22 14:42:27,662 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 77 transitions, 170 flow [2021-11-22 14:42:27,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 66 transitions, 144 flow [2021-11-22 14:42:27,716 INFO L129 PetriNetUnfolder]: 5/65 cut-off events. [2021-11-22 14:42:27,716 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-22 14:42:27,716 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:27,717 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:27,717 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:27,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:27,722 INFO L85 PathProgramCache]: Analyzing trace with hash 751055543, now seen corresponding path program 1 times [2021-11-22 14:42:27,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:27,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040463069] [2021-11-22 14:42:27,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:27,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:28,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:28,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040463069] [2021-11-22 14:42:28,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040463069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:42:28,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:42:28,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:42:28,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926239628] [2021-11-22 14:42:28,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:42:28,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:42:28,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:28,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:42:28,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:42:28,117 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 77 [2021-11-22 14:42:28,121 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:28,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:28,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 77 [2021-11-22 14:42:28,123 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:28,210 INFO L129 PetriNetUnfolder]: 8/105 cut-off events. [2021-11-22 14:42:28,210 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2021-11-22 14:42:28,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 105 events. 8/105 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 180 event pairs, 1 based on Foata normal form. 16/112 useless extension candidates. Maximal degree in co-relation 61. Up to 19 conditions per place. [2021-11-22 14:42:28,213 INFO L132 encePairwiseOnDemand]: 67/77 looper letters, 11 selfloop transitions, 2 changer transitions 7/71 dead transitions. [2021-11-22 14:42:28,213 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 203 flow [2021-11-22 14:42:28,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:42:28,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-22 14:42:28,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 394 transitions. [2021-11-22 14:42:28,229 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8528138528138528 [2021-11-22 14:42:28,229 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 394 transitions. [2021-11-22 14:42:28,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 394 transitions. [2021-11-22 14:42:28,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:28,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 394 transitions. [2021-11-22 14:42:28,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:28,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:28,260 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:28,262 INFO L186 Difference]: Start difference. First operand has 68 places, 66 transitions, 144 flow. Second operand 6 states and 394 transitions. [2021-11-22 14:42:28,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 203 flow [2021-11-22 14:42:28,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 189 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-22 14:42:28,276 INFO L242 Difference]: Finished difference. Result has 72 places, 63 transitions, 146 flow [2021-11-22 14:42:28,279 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2021-11-22 14:42:28,288 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2021-11-22 14:42:28,289 INFO L470 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 146 flow [2021-11-22 14:42:28,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:28,291 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:28,291 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:28,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:42:28,292 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:28,293 INFO L85 PathProgramCache]: Analyzing trace with hash 600101581, now seen corresponding path program 1 times [2021-11-22 14:42:28,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:28,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188640345] [2021-11-22 14:42:28,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:28,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:28,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:28,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188640345] [2021-11-22 14:42:28,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188640345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:42:28,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:42:28,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:42:28,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087260482] [2021-11-22 14:42:28,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:42:28,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:42:28,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:28,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:42:28,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:42:28,479 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2021-11-22 14:42:28,482 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:28,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:28,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2021-11-22 14:42:28,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:28,723 INFO L129 PetriNetUnfolder]: 90/304 cut-off events. [2021-11-22 14:42:28,724 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-11-22 14:42:28,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 555 conditions, 304 events. 90/304 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1346 event pairs, 32 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 541. Up to 99 conditions per place. [2021-11-22 14:42:28,732 INFO L132 encePairwiseOnDemand]: 70/77 looper letters, 35 selfloop transitions, 5 changer transitions 4/88 dead transitions. [2021-11-22 14:42:28,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 88 transitions, 301 flow [2021-11-22 14:42:28,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:42:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-22 14:42:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 372 transitions. [2021-11-22 14:42:28,741 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8051948051948052 [2021-11-22 14:42:28,741 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 372 transitions. [2021-11-22 14:42:28,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 372 transitions. [2021-11-22 14:42:28,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:28,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 372 transitions. [2021-11-22 14:42:28,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:28,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:28,752 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:28,752 INFO L186 Difference]: Start difference. First operand has 72 places, 63 transitions, 146 flow. Second operand 6 states and 372 transitions. [2021-11-22 14:42:28,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 88 transitions, 301 flow [2021-11-22 14:42:28,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 88 transitions, 293 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-11-22 14:42:28,758 INFO L242 Difference]: Finished difference. Result has 73 places, 65 transitions, 166 flow [2021-11-22 14:42:28,758 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2021-11-22 14:42:28,759 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2021-11-22 14:42:28,759 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 166 flow [2021-11-22 14:42:28,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:28,760 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:28,761 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:28,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 14:42:28,762 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:28,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:28,764 INFO L85 PathProgramCache]: Analyzing trace with hash 651339935, now seen corresponding path program 2 times [2021-11-22 14:42:28,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:28,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685935640] [2021-11-22 14:42:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:28,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:28,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:28,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685935640] [2021-11-22 14:42:28,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685935640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:28,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782781439] [2021-11-22 14:42:28,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:42:28,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:28,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:28,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:28,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:42:29,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:42:29,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:42:29,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 14:42:29,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:42:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:29,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:29,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782781439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:29,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:42:29,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2021-11-22 14:42:29,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454739033] [2021-11-22 14:42:29,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:29,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 14:42:29,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:29,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 14:42:29,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:42:29,364 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2021-11-22 14:42:29,365 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 166 flow. Second operand has 9 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:29,365 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:29,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2021-11-22 14:42:29,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:29,643 INFO L129 PetriNetUnfolder]: 147/407 cut-off events. [2021-11-22 14:42:29,643 INFO L130 PetriNetUnfolder]: For 129/137 co-relation queries the response was YES. [2021-11-22 14:42:29,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 407 events. 147/407 cut-off events. For 129/137 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1890 event pairs, 12 based on Foata normal form. 11/413 useless extension candidates. Maximal degree in co-relation 727. Up to 54 conditions per place. [2021-11-22 14:42:29,659 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 54 selfloop transitions, 27 changer transitions 6/131 dead transitions. [2021-11-22 14:42:29,659 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 131 transitions, 560 flow [2021-11-22 14:42:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 14:42:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-22 14:42:29,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 854 transitions. [2021-11-22 14:42:29,663 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7922077922077922 [2021-11-22 14:42:29,663 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 854 transitions. [2021-11-22 14:42:29,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 854 transitions. [2021-11-22 14:42:29,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:29,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 854 transitions. [2021-11-22 14:42:29,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 61.0) internal successors, (854), 14 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:29,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:29,676 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:29,677 INFO L186 Difference]: Start difference. First operand has 73 places, 65 transitions, 166 flow. Second operand 14 states and 854 transitions. [2021-11-22 14:42:29,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 131 transitions, 560 flow [2021-11-22 14:42:29,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 131 transitions, 535 flow, removed 5 selfloop flow, removed 3 redundant places. [2021-11-22 14:42:29,688 INFO L242 Difference]: Finished difference. Result has 89 places, 91 transitions, 342 flow [2021-11-22 14:42:29,688 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=342, PETRI_PLACES=89, PETRI_TRANSITIONS=91} [2021-11-22 14:42:29,691 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 21 predicate places. [2021-11-22 14:42:29,691 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 342 flow [2021-11-22 14:42:29,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:29,692 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:29,692 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:29,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-22 14:42:29,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:29,912 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:29,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:29,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1948148621, now seen corresponding path program 3 times [2021-11-22 14:42:29,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:29,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602842189] [2021-11-22 14:42:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:29,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:29,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:29,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602842189] [2021-11-22 14:42:29,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602842189] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:42:29,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:42:29,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:42:29,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4245945] [2021-11-22 14:42:29,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:42:29,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:42:29,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:29,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:42:29,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:42:29,982 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2021-11-22 14:42:29,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 342 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:29,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:29,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2021-11-22 14:42:29,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:30,112 INFO L129 PetriNetUnfolder]: 153/421 cut-off events. [2021-11-22 14:42:30,112 INFO L130 PetriNetUnfolder]: For 550/552 co-relation queries the response was YES. [2021-11-22 14:42:30,114 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 421 events. 153/421 cut-off events. For 550/552 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1942 event pairs, 64 based on Foata normal form. 3/417 useless extension candidates. Maximal degree in co-relation 944. Up to 221 conditions per place. [2021-11-22 14:42:30,120 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 55 selfloop transitions, 13 changer transitions 0/112 dead transitions. [2021-11-22 14:42:30,120 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 112 transitions, 582 flow [2021-11-22 14:42:30,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 14:42:30,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-22 14:42:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 317 transitions. [2021-11-22 14:42:30,122 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8233766233766234 [2021-11-22 14:42:30,123 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 317 transitions. [2021-11-22 14:42:30,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 317 transitions. [2021-11-22 14:42:30,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:30,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 317 transitions. [2021-11-22 14:42:30,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:30,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:30,126 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:30,126 INFO L186 Difference]: Start difference. First operand has 89 places, 91 transitions, 342 flow. Second operand 5 states and 317 transitions. [2021-11-22 14:42:30,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 112 transitions, 582 flow [2021-11-22 14:42:30,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 112 transitions, 578 flow, removed 2 selfloop flow, removed 0 redundant places. [2021-11-22 14:42:30,141 INFO L242 Difference]: Finished difference. Result has 95 places, 96 transitions, 415 flow [2021-11-22 14:42:30,142 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=415, PETRI_PLACES=95, PETRI_TRANSITIONS=96} [2021-11-22 14:42:30,144 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 27 predicate places. [2021-11-22 14:42:30,144 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 96 transitions, 415 flow [2021-11-22 14:42:30,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:30,145 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:30,145 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:30,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 14:42:30,145 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:30,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:30,147 INFO L85 PathProgramCache]: Analyzing trace with hash -497140103, now seen corresponding path program 4 times [2021-11-22 14:42:30,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:30,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791786744] [2021-11-22 14:42:30,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:30,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:30,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:30,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791786744] [2021-11-22 14:42:30,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791786744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:30,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867071202] [2021-11-22 14:42:30,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 14:42:30,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:30,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:30,252 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:30,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 14:42:30,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 14:42:30,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:42:30,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 14:42:30,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:42:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:30,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:30,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867071202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:30,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:42:30,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-11-22 14:42:30,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844382283] [2021-11-22 14:42:30,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:30,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 14:42:30,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:30,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 14:42:30,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-22 14:42:30,576 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2021-11-22 14:42:30,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 96 transitions, 415 flow. Second operand has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:30,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:30,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2021-11-22 14:42:30,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:30,819 INFO L129 PetriNetUnfolder]: 165/506 cut-off events. [2021-11-22 14:42:30,819 INFO L130 PetriNetUnfolder]: For 900/902 co-relation queries the response was YES. [2021-11-22 14:42:30,822 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1419 conditions, 506 events. 165/506 cut-off events. For 900/902 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2591 event pairs, 36 based on Foata normal form. 9/508 useless extension candidates. Maximal degree in co-relation 1102. Up to 114 conditions per place. [2021-11-22 14:42:30,826 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 66 selfloop transitions, 39 changer transitions 0/149 dead transitions. [2021-11-22 14:42:30,826 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 149 transitions, 883 flow [2021-11-22 14:42:30,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 14:42:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-22 14:42:30,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 564 transitions. [2021-11-22 14:42:30,829 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8138528138528138 [2021-11-22 14:42:30,829 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 564 transitions. [2021-11-22 14:42:30,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 564 transitions. [2021-11-22 14:42:30,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:30,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 564 transitions. [2021-11-22 14:42:30,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.666666666666664) internal successors, (564), 9 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:30,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:30,835 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:30,835 INFO L186 Difference]: Start difference. First operand has 95 places, 96 transitions, 415 flow. Second operand 9 states and 564 transitions. [2021-11-22 14:42:30,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 149 transitions, 883 flow [2021-11-22 14:42:30,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 149 transitions, 867 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-11-22 14:42:30,844 INFO L242 Difference]: Finished difference. Result has 107 places, 113 transitions, 648 flow [2021-11-22 14:42:30,844 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=648, PETRI_PLACES=107, PETRI_TRANSITIONS=113} [2021-11-22 14:42:30,845 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 39 predicate places. [2021-11-22 14:42:30,846 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 113 transitions, 648 flow [2021-11-22 14:42:30,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:30,846 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:30,846 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:30,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 14:42:31,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:31,072 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:31,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:31,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1146310219, now seen corresponding path program 5 times [2021-11-22 14:42:31,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:31,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438271621] [2021-11-22 14:42:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:31,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:31,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:31,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438271621] [2021-11-22 14:42:31,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438271621] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:31,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289728088] [2021-11-22 14:42:31,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 14:42:31,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:31,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:31,169 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:31,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 14:42:31,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:42:31,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:42:31,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 14:42:31,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:42:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:31,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:31,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289728088] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:31,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:42:31,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-11-22 14:42:31,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88725223] [2021-11-22 14:42:31,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:31,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 14:42:31,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:31,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 14:42:31,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-22 14:42:31,474 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2021-11-22 14:42:31,475 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 113 transitions, 648 flow. Second operand has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:31,476 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:31,476 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2021-11-22 14:42:31,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:31,754 INFO L129 PetriNetUnfolder]: 200/610 cut-off events. [2021-11-22 14:42:31,754 INFO L130 PetriNetUnfolder]: For 1371/1373 co-relation queries the response was YES. [2021-11-22 14:42:31,757 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1847 conditions, 610 events. 200/610 cut-off events. For 1371/1373 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3446 event pairs, 16 based on Foata normal form. 11/615 useless extension candidates. Maximal degree in co-relation 1509. Up to 106 conditions per place. [2021-11-22 14:42:31,763 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 64 selfloop transitions, 52 changer transitions 2/162 dead transitions. [2021-11-22 14:42:31,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 162 transitions, 1131 flow [2021-11-22 14:42:31,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 14:42:31,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-22 14:42:31,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 743 transitions. [2021-11-22 14:42:31,767 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8041125541125541 [2021-11-22 14:42:31,767 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 743 transitions. [2021-11-22 14:42:31,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 743 transitions. [2021-11-22 14:42:31,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:31,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 743 transitions. [2021-11-22 14:42:31,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:31,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:31,774 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:31,774 INFO L186 Difference]: Start difference. First operand has 107 places, 113 transitions, 648 flow. Second operand 12 states and 743 transitions. [2021-11-22 14:42:31,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 162 transitions, 1131 flow [2021-11-22 14:42:31,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 162 transitions, 1117 flow, removed 7 selfloop flow, removed 0 redundant places. [2021-11-22 14:42:31,787 INFO L242 Difference]: Finished difference. Result has 121 places, 123 transitions, 850 flow [2021-11-22 14:42:31,787 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=850, PETRI_PLACES=121, PETRI_TRANSITIONS=123} [2021-11-22 14:42:31,788 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 53 predicate places. [2021-11-22 14:42:31,788 INFO L470 AbstractCegarLoop]: Abstraction has has 121 places, 123 transitions, 850 flow [2021-11-22 14:42:31,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:31,789 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:31,789 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:31,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 14:42:32,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-22 14:42:32,010 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:32,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:32,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1190561105, now seen corresponding path program 6 times [2021-11-22 14:42:32,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:32,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332482553] [2021-11-22 14:42:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:32,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:32,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:32,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332482553] [2021-11-22 14:42:32,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332482553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:42:32,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:42:32,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:42:32,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850413072] [2021-11-22 14:42:32,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:42:32,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:42:32,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:32,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:42:32,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:42:32,078 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2021-11-22 14:42:32,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 123 transitions, 850 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:32,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:32,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2021-11-22 14:42:32,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:32,239 INFO L129 PetriNetUnfolder]: 199/570 cut-off events. [2021-11-22 14:42:32,239 INFO L130 PetriNetUnfolder]: For 1517/1519 co-relation queries the response was YES. [2021-11-22 14:42:32,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1920 conditions, 570 events. 199/570 cut-off events. For 1517/1519 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3139 event pairs, 91 based on Foata normal form. 1/561 useless extension candidates. Maximal degree in co-relation 1618. Up to 231 conditions per place. [2021-11-22 14:42:32,248 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 68 selfloop transitions, 23 changer transitions 2/137 dead transitions. [2021-11-22 14:42:32,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 137 transitions, 1111 flow [2021-11-22 14:42:32,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 14:42:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-22 14:42:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 315 transitions. [2021-11-22 14:42:32,250 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2021-11-22 14:42:32,250 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 315 transitions. [2021-11-22 14:42:32,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 315 transitions. [2021-11-22 14:42:32,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:32,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 315 transitions. [2021-11-22 14:42:32,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:32,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:32,253 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:32,253 INFO L186 Difference]: Start difference. First operand has 121 places, 123 transitions, 850 flow. Second operand 5 states and 315 transitions. [2021-11-22 14:42:32,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 137 transitions, 1111 flow [2021-11-22 14:42:32,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 137 transitions, 1086 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-11-22 14:42:32,267 INFO L242 Difference]: Finished difference. Result has 122 places, 122 transitions, 849 flow [2021-11-22 14:42:32,268 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=849, PETRI_PLACES=122, PETRI_TRANSITIONS=122} [2021-11-22 14:42:32,268 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 54 predicate places. [2021-11-22 14:42:32,268 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 122 transitions, 849 flow [2021-11-22 14:42:32,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:32,269 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:32,269 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:32,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 14:42:32,269 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:32,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:32,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1682419139, now seen corresponding path program 1 times [2021-11-22 14:42:32,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:32,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212843845] [2021-11-22 14:42:32,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:32,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:42:32,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:32,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212843845] [2021-11-22 14:42:32,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212843845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:32,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880660029] [2021-11-22 14:42:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:32,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:32,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:32,423 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:32,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 14:42:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:32,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 14:42:32,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:42:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:42:32,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:42:32,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880660029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:32,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:42:32,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2021-11-22 14:42:32,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184215404] [2021-11-22 14:42:32,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:32,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:42:32,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:32,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:42:32,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:42:32,793 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 77 [2021-11-22 14:42:32,794 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 122 transitions, 849 flow. Second operand has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:32,794 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:32,794 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 77 [2021-11-22 14:42:32,795 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:32,942 INFO L129 PetriNetUnfolder]: 103/595 cut-off events. [2021-11-22 14:42:32,943 INFO L130 PetriNetUnfolder]: For 1064/1093 co-relation queries the response was YES. [2021-11-22 14:42:32,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1612 conditions, 595 events. 103/595 cut-off events. For 1064/1093 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3915 event pairs, 10 based on Foata normal form. 12/597 useless extension candidates. Maximal degree in co-relation 1465. Up to 79 conditions per place. [2021-11-22 14:42:32,951 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 18 selfloop transitions, 5 changer transitions 5/137 dead transitions. [2021-11-22 14:42:32,951 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 137 transitions, 939 flow [2021-11-22 14:42:32,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:42:32,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-22 14:42:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 395 transitions. [2021-11-22 14:42:32,953 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.854978354978355 [2021-11-22 14:42:32,953 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 395 transitions. [2021-11-22 14:42:32,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 395 transitions. [2021-11-22 14:42:32,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:32,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 395 transitions. [2021-11-22 14:42:32,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.83333333333333) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:32,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:32,957 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:32,957 INFO L186 Difference]: Start difference. First operand has 122 places, 122 transitions, 849 flow. Second operand 6 states and 395 transitions. [2021-11-22 14:42:32,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 137 transitions, 939 flow [2021-11-22 14:42:32,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 137 transitions, 829 flow, removed 3 selfloop flow, removed 11 redundant places. [2021-11-22 14:42:32,968 INFO L242 Difference]: Finished difference. Result has 118 places, 124 transitions, 771 flow [2021-11-22 14:42:32,968 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=771, PETRI_PLACES=118, PETRI_TRANSITIONS=124} [2021-11-22 14:42:32,969 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 50 predicate places. [2021-11-22 14:42:32,969 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 124 transitions, 771 flow [2021-11-22 14:42:32,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:32,970 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:32,970 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:33,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 14:42:33,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-22 14:42:33,184 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:33,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:33,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1656979189, now seen corresponding path program 2 times [2021-11-22 14:42:33,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:33,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485592171] [2021-11-22 14:42:33,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:33,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:33,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:33,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485592171] [2021-11-22 14:42:33,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485592171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:33,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802819668] [2021-11-22 14:42:33,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:42:33,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:33,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:33,273 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:33,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 14:42:33,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:42:33,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:42:33,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 14:42:33,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:42:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:33,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:33,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802819668] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:33,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:42:33,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2021-11-22 14:42:33,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46880513] [2021-11-22 14:42:33,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:33,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 14:42:33,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:33,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 14:42:33,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:42:33,743 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-11-22 14:42:33,745 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 124 transitions, 771 flow. Second operand has 19 states, 19 states have (on average 55.78947368421053) internal successors, (1060), 19 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:33,745 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:33,745 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-11-22 14:42:33,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:35,472 INFO L129 PetriNetUnfolder]: 1266/3622 cut-off events. [2021-11-22 14:42:35,473 INFO L130 PetriNetUnfolder]: For 5997/5997 co-relation queries the response was YES. [2021-11-22 14:42:35,526 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11411 conditions, 3622 events. 1266/3622 cut-off events. For 5997/5997 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 30698 event pairs, 136 based on Foata normal form. 34/3644 useless extension candidates. Maximal degree in co-relation 11308. Up to 388 conditions per place. [2021-11-22 14:42:35,552 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 231 selfloop transitions, 207 changer transitions 28/508 dead transitions. [2021-11-22 14:42:35,552 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 508 transitions, 4079 flow [2021-11-22 14:42:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-22 14:42:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-11-22 14:42:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3555 transitions. [2021-11-22 14:42:35,564 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7568660847349372 [2021-11-22 14:42:35,564 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3555 transitions. [2021-11-22 14:42:35,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3555 transitions. [2021-11-22 14:42:35,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:35,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3555 transitions. [2021-11-22 14:42:35,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 58.278688524590166) internal successors, (3555), 61 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:35,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 77.0) internal successors, (4774), 62 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:35,594 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 77.0) internal successors, (4774), 62 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:35,594 INFO L186 Difference]: Start difference. First operand has 118 places, 124 transitions, 771 flow. Second operand 61 states and 3555 transitions. [2021-11-22 14:42:35,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 508 transitions, 4079 flow [2021-11-22 14:42:35,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 508 transitions, 4007 flow, removed 36 selfloop flow, removed 2 redundant places. [2021-11-22 14:42:35,624 INFO L242 Difference]: Finished difference. Result has 190 places, 327 transitions, 2668 flow [2021-11-22 14:42:35,624 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=2668, PETRI_PLACES=190, PETRI_TRANSITIONS=327} [2021-11-22 14:42:35,625 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 122 predicate places. [2021-11-22 14:42:35,625 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 327 transitions, 2668 flow [2021-11-22 14:42:35,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.78947368421053) internal successors, (1060), 19 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:35,626 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:35,626 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:35,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 14:42:35,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:35,840 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:35,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:35,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1790021439, now seen corresponding path program 3 times [2021-11-22 14:42:35,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:35,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212099845] [2021-11-22 14:42:35,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:35,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:35,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:35,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212099845] [2021-11-22 14:42:35,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212099845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:35,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715180350] [2021-11-22 14:42:35,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:42:35,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:35,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:35,940 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:35,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 14:42:36,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 14:42:36,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:42:36,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 14:42:36,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:42:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:36,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:36,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715180350] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:36,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:42:36,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2021-11-22 14:42:36,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366086936] [2021-11-22 14:42:36,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:36,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-22 14:42:36,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:36,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-22 14:42:36,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-22 14:42:36,313 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-11-22 14:42:36,314 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 327 transitions, 2668 flow. Second operand has 16 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:36,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:36,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-11-22 14:42:36,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:37,729 INFO L129 PetriNetUnfolder]: 1421/4102 cut-off events. [2021-11-22 14:42:37,729 INFO L130 PetriNetUnfolder]: For 17951/17951 co-relation queries the response was YES. [2021-11-22 14:42:37,763 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16930 conditions, 4102 events. 1421/4102 cut-off events. For 17951/17951 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 36168 event pairs, 243 based on Foata normal form. 19/4087 useless extension candidates. Maximal degree in co-relation 15806. Up to 963 conditions per place. [2021-11-22 14:42:37,799 INFO L132 encePairwiseOnDemand]: 66/77 looper letters, 190 selfloop transitions, 268 changer transitions 33/533 dead transitions. [2021-11-22 14:42:37,799 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 533 transitions, 5469 flow [2021-11-22 14:42:37,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-22 14:42:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-22 14:42:37,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1355 transitions. [2021-11-22 14:42:37,803 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7651044607566346 [2021-11-22 14:42:37,803 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1355 transitions. [2021-11-22 14:42:37,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1355 transitions. [2021-11-22 14:42:37,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:37,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1355 transitions. [2021-11-22 14:42:37,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 58.91304347826087) internal successors, (1355), 23 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:37,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:37,812 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:37,812 INFO L186 Difference]: Start difference. First operand has 190 places, 327 transitions, 2668 flow. Second operand 23 states and 1355 transitions. [2021-11-22 14:42:37,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 533 transitions, 5469 flow [2021-11-22 14:42:37,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 533 transitions, 5102 flow, removed 120 selfloop flow, removed 7 redundant places. [2021-11-22 14:42:37,948 INFO L242 Difference]: Finished difference. Result has 215 places, 413 transitions, 4025 flow [2021-11-22 14:42:37,949 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=2387, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4025, PETRI_PLACES=215, PETRI_TRANSITIONS=413} [2021-11-22 14:42:37,950 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 147 predicate places. [2021-11-22 14:42:37,950 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 413 transitions, 4025 flow [2021-11-22 14:42:37,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:37,951 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:37,951 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:37,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 14:42:38,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:38,164 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:38,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:38,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1983759899, now seen corresponding path program 4 times [2021-11-22 14:42:38,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:38,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513807819] [2021-11-22 14:42:38,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:38,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:38,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:38,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513807819] [2021-11-22 14:42:38,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513807819] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:38,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488013425] [2021-11-22 14:42:38,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 14:42:38,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:38,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:38,262 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:38,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 14:42:38,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 14:42:38,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:42:38,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 14:42:38,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:42:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:38,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:38,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488013425] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:38,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:42:38,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-11-22 14:42:38,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442187211] [2021-11-22 14:42:38,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:38,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 14:42:38,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:38,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 14:42:38,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-22 14:42:38,781 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-11-22 14:42:38,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 413 transitions, 4025 flow. Second operand has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:38,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:38,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-11-22 14:42:38,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:40,806 INFO L129 PetriNetUnfolder]: 1688/4815 cut-off events. [2021-11-22 14:42:40,806 INFO L130 PetriNetUnfolder]: For 32142/32142 co-relation queries the response was YES. [2021-11-22 14:42:40,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22322 conditions, 4815 events. 1688/4815 cut-off events. For 32142/32142 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 43903 event pairs, 221 based on Foata normal form. 23/4794 useless extension candidates. Maximal degree in co-relation 21111. Up to 1022 conditions per place. [2021-11-22 14:42:40,888 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 219 selfloop transitions, 356 changer transitions 4/621 dead transitions. [2021-11-22 14:42:40,888 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 621 transitions, 7180 flow [2021-11-22 14:42:40,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-22 14:42:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-22 14:42:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1753 transitions. [2021-11-22 14:42:40,893 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7588744588744589 [2021-11-22 14:42:40,893 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1753 transitions. [2021-11-22 14:42:40,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1753 transitions. [2021-11-22 14:42:40,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:40,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1753 transitions. [2021-11-22 14:42:40,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.43333333333333) internal successors, (1753), 30 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:40,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 77.0) internal successors, (2387), 31 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:40,905 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 77.0) internal successors, (2387), 31 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:40,905 INFO L186 Difference]: Start difference. First operand has 215 places, 413 transitions, 4025 flow. Second operand 30 states and 1753 transitions. [2021-11-22 14:42:40,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 621 transitions, 7180 flow [2021-11-22 14:42:41,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 621 transitions, 7127 flow, removed 24 selfloop flow, removed 2 redundant places. [2021-11-22 14:42:41,182 INFO L242 Difference]: Finished difference. Result has 256 places, 512 transitions, 6429 flow [2021-11-22 14:42:41,182 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=3996, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6429, PETRI_PLACES=256, PETRI_TRANSITIONS=512} [2021-11-22 14:42:41,183 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 188 predicate places. [2021-11-22 14:42:41,183 INFO L470 AbstractCegarLoop]: Abstraction has has 256 places, 512 transitions, 6429 flow [2021-11-22 14:42:41,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:41,184 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:41,184 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:41,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 14:42:41,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:41,412 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:41,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:41,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1217209175, now seen corresponding path program 5 times [2021-11-22 14:42:41,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:41,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795390643] [2021-11-22 14:42:41,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:41,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:41,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:41,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795390643] [2021-11-22 14:42:41,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795390643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:41,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652270746] [2021-11-22 14:42:41,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 14:42:41,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:41,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:41,483 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:41,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 14:42:41,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-22 14:42:41,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:42:41,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 14:42:41,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:42:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:41,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:41,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652270746] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:41,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:42:41,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-11-22 14:42:41,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502751472] [2021-11-22 14:42:41,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:41,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-22 14:42:41,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:41,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-22 14:42:41,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-11-22 14:42:41,860 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-11-22 14:42:41,861 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 512 transitions, 6429 flow. Second operand has 17 states, 17 states have (on average 55.64705882352941) internal successors, (946), 17 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:41,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:41,862 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-11-22 14:42:41,862 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:44,512 INFO L129 PetriNetUnfolder]: 2056/6005 cut-off events. [2021-11-22 14:42:44,512 INFO L130 PetriNetUnfolder]: For 63127/63127 co-relation queries the response was YES. [2021-11-22 14:42:44,585 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32168 conditions, 6005 events. 2056/6005 cut-off events. For 63127/63127 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 58570 event pairs, 190 based on Foata normal form. 4/5983 useless extension candidates. Maximal degree in co-relation 31845. Up to 791 conditions per place. [2021-11-22 14:42:44,632 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 342 selfloop transitions, 417 changer transitions 13/814 dead transitions. [2021-11-22 14:42:44,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 814 transitions, 11197 flow [2021-11-22 14:42:44,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-22 14:42:44,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-11-22 14:42:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2713 transitions. [2021-11-22 14:42:44,642 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7496546007184305 [2021-11-22 14:42:44,642 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2713 transitions. [2021-11-22 14:42:44,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2713 transitions. [2021-11-22 14:42:44,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:44,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2713 transitions. [2021-11-22 14:42:44,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 57.723404255319146) internal successors, (2713), 47 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:44,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 77.0) internal successors, (3696), 48 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:44,661 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 77.0) internal successors, (3696), 48 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:44,661 INFO L186 Difference]: Start difference. First operand has 256 places, 512 transitions, 6429 flow. Second operand 47 states and 2713 transitions. [2021-11-22 14:42:44,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 814 transitions, 11197 flow [2021-11-22 14:42:45,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 814 transitions, 10756 flow, removed 93 selfloop flow, removed 9 redundant places. [2021-11-22 14:42:45,153 INFO L242 Difference]: Finished difference. Result has 307 places, 657 transitions, 9167 flow [2021-11-22 14:42:45,154 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=6120, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=9167, PETRI_PLACES=307, PETRI_TRANSITIONS=657} [2021-11-22 14:42:45,155 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 239 predicate places. [2021-11-22 14:42:45,155 INFO L470 AbstractCegarLoop]: Abstraction has has 307 places, 657 transitions, 9167 flow [2021-11-22 14:42:45,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.64705882352941) internal successors, (946), 17 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:45,156 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:45,156 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:45,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-22 14:42:45,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:45,364 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:45,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:45,365 INFO L85 PathProgramCache]: Analyzing trace with hash 118370099, now seen corresponding path program 6 times [2021-11-22 14:42:45,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:45,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707305767] [2021-11-22 14:42:45,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:45,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:45,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:45,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707305767] [2021-11-22 14:42:45,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707305767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:45,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133182231] [2021-11-22 14:42:45,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 14:42:45,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:45,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:45,450 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:45,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 14:42:45,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-22 14:42:45,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:42:45,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 14:42:45,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:42:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:45,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:45,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133182231] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:45,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:42:45,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-11-22 14:42:45,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510300247] [2021-11-22 14:42:45,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:45,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 14:42:45,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:45,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 14:42:45,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-22 14:42:45,873 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-11-22 14:42:45,875 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 657 transitions, 9167 flow. Second operand has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:45,875 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:45,875 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-11-22 14:42:45,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:48,407 INFO L129 PetriNetUnfolder]: 2248/6588 cut-off events. [2021-11-22 14:42:48,408 INFO L130 PetriNetUnfolder]: For 78964/78964 co-relation queries the response was YES. [2021-11-22 14:42:48,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38187 conditions, 6588 events. 2248/6588 cut-off events. For 78964/78964 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 65877 event pairs, 239 based on Foata normal form. 19/6586 useless extension candidates. Maximal degree in co-relation 37963. Up to 1340 conditions per place. [2021-11-22 14:42:48,665 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 270 selfloop transitions, 524 changer transitions 3/839 dead transitions. [2021-11-22 14:42:48,669 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 839 transitions, 12797 flow [2021-11-22 14:42:48,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-22 14:42:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-11-22 14:42:48,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2368 transitions. [2021-11-22 14:42:48,686 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7500791891035794 [2021-11-22 14:42:48,686 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2368 transitions. [2021-11-22 14:42:48,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2368 transitions. [2021-11-22 14:42:48,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:48,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2368 transitions. [2021-11-22 14:42:48,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.75609756097561) internal successors, (2368), 41 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:48,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 77.0) internal successors, (3234), 42 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:48,729 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 77.0) internal successors, (3234), 42 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:48,729 INFO L186 Difference]: Start difference. First operand has 307 places, 657 transitions, 9167 flow. Second operand 41 states and 2368 transitions. [2021-11-22 14:42:48,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 839 transitions, 12797 flow [2021-11-22 14:42:49,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 839 transitions, 12160 flow, removed 210 selfloop flow, removed 3 redundant places. [2021-11-22 14:42:49,722 INFO L242 Difference]: Finished difference. Result has 352 places, 723 transitions, 11195 flow [2021-11-22 14:42:49,723 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=8649, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=11195, PETRI_PLACES=352, PETRI_TRANSITIONS=723} [2021-11-22 14:42:49,724 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 284 predicate places. [2021-11-22 14:42:49,724 INFO L470 AbstractCegarLoop]: Abstraction has has 352 places, 723 transitions, 11195 flow [2021-11-22 14:42:49,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:49,726 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:49,726 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:49,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 14:42:49,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-22 14:42:49,952 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:49,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:49,953 INFO L85 PathProgramCache]: Analyzing trace with hash -151736549, now seen corresponding path program 7 times [2021-11-22 14:42:49,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:49,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823715418] [2021-11-22 14:42:49,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:49,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:50,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:50,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823715418] [2021-11-22 14:42:50,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823715418] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:50,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842678147] [2021-11-22 14:42:50,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 14:42:50,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:50,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:50,052 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:50,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 14:42:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:50,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 14:42:50,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:42:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:50,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:50,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842678147] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:50,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:42:50,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-11-22 14:42:50,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914792993] [2021-11-22 14:42:50,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:50,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-22 14:42:50,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:50,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-22 14:42:50,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-11-22 14:42:50,515 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-11-22 14:42:50,517 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 723 transitions, 11195 flow. Second operand has 17 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:50,517 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:50,518 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-11-22 14:42:50,518 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:53,707 INFO L129 PetriNetUnfolder]: 2315/6806 cut-off events. [2021-11-22 14:42:53,707 INFO L130 PetriNetUnfolder]: For 94421/94421 co-relation queries the response was YES. [2021-11-22 14:42:53,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40883 conditions, 6806 events. 2315/6806 cut-off events. For 94421/94421 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 68521 event pairs, 234 based on Foata normal form. 31/6802 useless extension candidates. Maximal degree in co-relation 40646. Up to 1016 conditions per place. [2021-11-22 14:42:53,805 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 328 selfloop transitions, 568 changer transitions 28/966 dead transitions. [2021-11-22 14:42:53,805 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 966 transitions, 15569 flow [2021-11-22 14:42:53,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-22 14:42:53,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-11-22 14:42:53,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3914 transitions. [2021-11-22 14:42:53,814 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7475171886936592 [2021-11-22 14:42:53,814 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3914 transitions. [2021-11-22 14:42:53,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3914 transitions. [2021-11-22 14:42:53,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:53,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3914 transitions. [2021-11-22 14:42:53,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 57.55882352941177) internal successors, (3914), 68 states have internal predecessors, (3914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:53,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 77.0) internal successors, (5313), 69 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:53,836 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 77.0) internal successors, (5313), 69 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:53,836 INFO L186 Difference]: Start difference. First operand has 352 places, 723 transitions, 11195 flow. Second operand 68 states and 3914 transitions. [2021-11-22 14:42:53,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 966 transitions, 15569 flow [2021-11-22 14:42:54,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 966 transitions, 15038 flow, removed 83 selfloop flow, removed 25 redundant places. [2021-11-22 14:42:54,742 INFO L242 Difference]: Finished difference. Result has 403 places, 772 transitions, 13155 flow [2021-11-22 14:42:54,742 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=10686, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=13155, PETRI_PLACES=403, PETRI_TRANSITIONS=772} [2021-11-22 14:42:54,743 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 335 predicate places. [2021-11-22 14:42:54,743 INFO L470 AbstractCegarLoop]: Abstraction has has 403 places, 772 transitions, 13155 flow [2021-11-22 14:42:54,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:54,744 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:54,744 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:54,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 14:42:54,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-22 14:42:54,964 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:54,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:54,964 INFO L85 PathProgramCache]: Analyzing trace with hash -981160703, now seen corresponding path program 8 times [2021-11-22 14:42:54,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:54,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081827028] [2021-11-22 14:42:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:54,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:55,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:55,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081827028] [2021-11-22 14:42:55,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081827028] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:55,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406452486] [2021-11-22 14:42:55,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:42:55,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:55,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:55,047 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:55,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 14:42:55,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:42:55,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:42:55,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 14:42:55,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:42:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:55,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:55,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406452486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:55,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:42:55,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-11-22 14:42:55,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813263012] [2021-11-22 14:42:55,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:55,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-22 14:42:55,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:55,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-22 14:42:55,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-22 14:42:55,596 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-11-22 14:42:55,598 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 772 transitions, 13155 flow. Second operand has 20 states, 20 states have (on average 55.4) internal successors, (1108), 20 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:55,598 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:55,598 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-11-22 14:42:55,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:58,359 INFO L129 PetriNetUnfolder]: 2327/6841 cut-off events. [2021-11-22 14:42:58,359 INFO L130 PetriNetUnfolder]: For 108630/108630 co-relation queries the response was YES. [2021-11-22 14:42:58,414 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43399 conditions, 6841 events. 2327/6841 cut-off events. For 108630/108630 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 68847 event pairs, 657 based on Foata normal form. 1/6744 useless extension candidates. Maximal degree in co-relation 43150. Up to 2226 conditions per place. [2021-11-22 14:42:58,460 INFO L132 encePairwiseOnDemand]: 66/77 looper letters, 549 selfloop transitions, 245 changer transitions 8/844 dead transitions. [2021-11-22 14:42:58,460 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 844 transitions, 15539 flow [2021-11-22 14:42:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-22 14:42:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-22 14:42:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1386 transitions. [2021-11-22 14:42:58,463 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.75 [2021-11-22 14:42:58,463 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1386 transitions. [2021-11-22 14:42:58,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1386 transitions. [2021-11-22 14:42:58,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:58,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1386 transitions. [2021-11-22 14:42:58,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.75) internal successors, (1386), 24 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:58,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:58,471 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:58,471 INFO L186 Difference]: Start difference. First operand has 403 places, 772 transitions, 13155 flow. Second operand 24 states and 1386 transitions. [2021-11-22 14:42:58,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 844 transitions, 15539 flow [2021-11-22 14:42:59,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 844 transitions, 15071 flow, removed 76 selfloop flow, removed 30 redundant places. [2021-11-22 14:42:59,369 INFO L242 Difference]: Finished difference. Result has 405 places, 791 transitions, 13538 flow [2021-11-22 14:42:59,370 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=12707, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=13538, PETRI_PLACES=405, PETRI_TRANSITIONS=791} [2021-11-22 14:42:59,371 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 337 predicate places. [2021-11-22 14:42:59,371 INFO L470 AbstractCegarLoop]: Abstraction has has 405 places, 791 transitions, 13538 flow [2021-11-22 14:42:59,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.4) internal successors, (1108), 20 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:59,372 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:59,372 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:59,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 14:42:59,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-22 14:42:59,600 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:59,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:59,600 INFO L85 PathProgramCache]: Analyzing trace with hash 331168385, now seen corresponding path program 9 times [2021-11-22 14:42:59,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:59,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355375684] [2021-11-22 14:42:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:59,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:59,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:59,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355375684] [2021-11-22 14:42:59,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355375684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:59,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757942178] [2021-11-22 14:42:59,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:42:59,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:59,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:59,677 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:59,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 14:42:59,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 14:42:59,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:42:59,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 14:42:59,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:43:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:43:00,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:43:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:43:00,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757942178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:43:00,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:43:00,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-11-22 14:43:00,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022378584] [2021-11-22 14:43:00,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:43:00,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 14:43:00,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:00,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 14:43:00,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:43:00,207 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-11-22 14:43:00,208 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 791 transitions, 13538 flow. Second operand has 19 states, 19 states have (on average 55.68421052631579) internal successors, (1058), 19 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:00,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:43:00,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-11-22 14:43:00,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:43:05,198 INFO L129 PetriNetUnfolder]: 3673/10200 cut-off events. [2021-11-22 14:43:05,198 INFO L130 PetriNetUnfolder]: For 187722/187722 co-relation queries the response was YES. [2021-11-22 14:43:05,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68587 conditions, 10200 events. 3673/10200 cut-off events. For 187722/187722 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 107773 event pairs, 564 based on Foata normal form. 30/10127 useless extension candidates. Maximal degree in co-relation 68395. Up to 1978 conditions per place. [2021-11-22 14:43:05,404 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 488 selfloop transitions, 889 changer transitions 17/1436 dead transitions. [2021-11-22 14:43:05,404 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 1436 transitions, 27257 flow [2021-11-22 14:43:05,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-22 14:43:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-11-22 14:43:05,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 3930 transitions. [2021-11-22 14:43:05,413 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7396950875211745 [2021-11-22 14:43:05,413 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 3930 transitions. [2021-11-22 14:43:05,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 3930 transitions. [2021-11-22 14:43:05,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:43:05,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 3930 transitions. [2021-11-22 14:43:05,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 56.95652173913044) internal successors, (3930), 69 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:05,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 77.0) internal successors, (5390), 70 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:05,437 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 77.0) internal successors, (5390), 70 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:05,437 INFO L186 Difference]: Start difference. First operand has 405 places, 791 transitions, 13538 flow. Second operand 69 states and 3930 transitions. [2021-11-22 14:43:05,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 1436 transitions, 27257 flow [2021-11-22 14:43:07,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 1436 transitions, 26808 flow, removed 20 selfloop flow, removed 4 redundant places. [2021-11-22 14:43:07,045 INFO L242 Difference]: Finished difference. Result has 485 places, 1194 transitions, 24458 flow [2021-11-22 14:43:07,046 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=13291, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=24458, PETRI_PLACES=485, PETRI_TRANSITIONS=1194} [2021-11-22 14:43:07,046 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 417 predicate places. [2021-11-22 14:43:07,046 INFO L470 AbstractCegarLoop]: Abstraction has has 485 places, 1194 transitions, 24458 flow [2021-11-22 14:43:07,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.68421052631579) internal successors, (1058), 19 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:07,047 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:43:07,047 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:07,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-22 14:43:07,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-22 14:43:07,247 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:43:07,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:07,248 INFO L85 PathProgramCache]: Analyzing trace with hash -838217509, now seen corresponding path program 10 times [2021-11-22 14:43:07,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:43:07,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928832538] [2021-11-22 14:43:07,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:43:07,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:43:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:43:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:43:07,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:43:07,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928832538] [2021-11-22 14:43:07,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928832538] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:43:07,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701699358] [2021-11-22 14:43:07,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 14:43:07,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:43:07,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:43:07,325 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:43:07,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-22 14:43:07,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 14:43:07,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:43:07,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 14:43:07,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:43:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:43:07,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:43:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:43:07,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701699358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:43:07,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:43:07,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-11-22 14:43:07,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100330926] [2021-11-22 14:43:07,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:43:07,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 14:43:07,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:07,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 14:43:07,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:43:07,759 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-11-22 14:43:07,760 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 1194 transitions, 24458 flow. Second operand has 19 states, 19 states have (on average 55.73684210526316) internal successors, (1059), 19 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:07,760 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:43:07,760 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-11-22 14:43:07,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:43:17,813 INFO L129 PetriNetUnfolder]: 6250/17016 cut-off events. [2021-11-22 14:43:17,814 INFO L130 PetriNetUnfolder]: For 440564/440564 co-relation queries the response was YES. [2021-11-22 14:43:18,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 130530 conditions, 17016 events. 6250/17016 cut-off events. For 440564/440564 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 195108 event pairs, 817 based on Foata normal form. 45/16917 useless extension candidates. Maximal degree in co-relation 129212. Up to 2737 conditions per place. [2021-11-22 14:43:18,244 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 663 selfloop transitions, 1697 changer transitions 31/2433 dead transitions. [2021-11-22 14:43:18,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 2433 transitions, 54424 flow [2021-11-22 14:43:18,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-22 14:43:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-11-22 14:43:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 4916 transitions. [2021-11-22 14:43:18,259 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7423739051646029 [2021-11-22 14:43:18,260 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 4916 transitions. [2021-11-22 14:43:18,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 4916 transitions. [2021-11-22 14:43:18,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:43:18,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 4916 transitions. [2021-11-22 14:43:18,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 57.16279069767442) internal successors, (4916), 86 states have internal predecessors, (4916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:18,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 77.0) internal successors, (6699), 87 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:18,286 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 77.0) internal successors, (6699), 87 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:18,286 INFO L186 Difference]: Start difference. First operand has 485 places, 1194 transitions, 24458 flow. Second operand 86 states and 4916 transitions. [2021-11-22 14:43:18,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 2433 transitions, 54424 flow [2021-11-22 14:43:24,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 2433 transitions, 53393 flow, removed 77 selfloop flow, removed 36 redundant places. [2021-11-22 14:43:24,519 INFO L242 Difference]: Finished difference. Result has 556 places, 2081 transitions, 50135 flow [2021-11-22 14:43:24,521 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=23792, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=865, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=50135, PETRI_PLACES=556, PETRI_TRANSITIONS=2081} [2021-11-22 14:43:24,521 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 488 predicate places. [2021-11-22 14:43:24,522 INFO L470 AbstractCegarLoop]: Abstraction has has 556 places, 2081 transitions, 50135 flow [2021-11-22 14:43:24,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.73684210526316) internal successors, (1059), 19 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:24,522 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:43:24,522 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:24,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-22 14:43:24,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-22 14:43:24,748 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:43:24,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:24,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1400475587, now seen corresponding path program 11 times [2021-11-22 14:43:24,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:43:24,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092671796] [2021-11-22 14:43:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:43:24,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:43:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:43:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:43:24,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:43:24,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092671796] [2021-11-22 14:43:24,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092671796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:43:24,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544224044] [2021-11-22 14:43:24,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 14:43:24,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:43:24,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:43:24,826 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:43:24,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-22 14:43:24,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-22 14:43:24,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:43:24,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 14:43:24,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:43:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:43:25,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:43:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:43:25,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544224044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:43:25,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:43:25,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-11-22 14:43:25,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459222785] [2021-11-22 14:43:25,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:43:25,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 14:43:25,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:25,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 14:43:25,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:43:25,189 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-11-22 14:43:25,190 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 2081 transitions, 50135 flow. Second operand has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:25,190 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:43:25,190 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-11-22 14:43:25,190 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:43:40,195 INFO L129 PetriNetUnfolder]: 6307/17364 cut-off events. [2021-11-22 14:43:40,195 INFO L130 PetriNetUnfolder]: For 577168/577168 co-relation queries the response was YES. [2021-11-22 14:43:40,584 INFO L84 FinitePrefix]: Finished finitePrefix Result has 146449 conditions, 17364 events. 6307/17364 cut-off events. For 577168/577168 co-relation queries the response was YES. Maximal size of possible extension queue 1217. Compared 201459 event pairs, 839 based on Foata normal form. 7/17209 useless extension candidates. Maximal degree in co-relation 145139. Up to 3276 conditions per place. [2021-11-22 14:43:40,889 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 989 selfloop transitions, 1260 changer transitions 18/2309 dead transitions. [2021-11-22 14:43:40,889 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 2309 transitions, 58283 flow [2021-11-22 14:43:40,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-22 14:43:40,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-11-22 14:43:40,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2887 transitions. [2021-11-22 14:43:40,895 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7498701298701299 [2021-11-22 14:43:40,895 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2887 transitions. [2021-11-22 14:43:40,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2887 transitions. [2021-11-22 14:43:40,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:43:40,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2887 transitions. [2021-11-22 14:43:40,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.74) internal successors, (2887), 50 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:40,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 77.0) internal successors, (3927), 51 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:40,911 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 77.0) internal successors, (3927), 51 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:40,911 INFO L186 Difference]: Start difference. First operand has 556 places, 2081 transitions, 50135 flow. Second operand 50 states and 2887 transitions. [2021-11-22 14:43:40,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 2309 transitions, 58283 flow [2021-11-22 14:43:49,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 2309 transitions, 57719 flow, removed 177 selfloop flow, removed 35 redundant places. [2021-11-22 14:43:49,849 INFO L242 Difference]: Finished difference. Result has 577 places, 2117 transitions, 53869 flow [2021-11-22 14:43:49,851 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=49633, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=53869, PETRI_PLACES=577, PETRI_TRANSITIONS=2117} [2021-11-22 14:43:49,851 INFO L334 CegarLoopForPetriNet]: 68 programPoint places, 509 predicate places. [2021-11-22 14:43:49,851 INFO L470 AbstractCegarLoop]: Abstraction has has 577 places, 2117 transitions, 53869 flow [2021-11-22 14:43:49,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:49,852 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:43:49,852 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:49,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-22 14:43:50,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:43:50,052 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:43:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:50,053 INFO L85 PathProgramCache]: Analyzing trace with hash -757615803, now seen corresponding path program 12 times [2021-11-22 14:43:50,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:43:50,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549770134] [2021-11-22 14:43:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:43:50,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:43:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:43:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:43:50,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:43:50,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549770134] [2021-11-22 14:43:50,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549770134] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:43:50,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467776609] [2021-11-22 14:43:50,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 14:43:50,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:43:50,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:43:50,125 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:43:50,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad2ab89-2ade-4861-93bf-5f2edc9f3ef4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-22 14:43:50,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-22 14:43:50,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:43:50,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 14:43:50,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:43:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:43:50,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:43:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:43:50,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467776609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:43:50,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:43:50,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-11-22 14:43:50,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866199124] [2021-11-22 14:43:50,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:43:50,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 14:43:50,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:50,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 14:43:50,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:43:50,519 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2021-11-22 14:43:50,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 2117 transitions, 53869 flow. Second operand has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:50,521 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:43:50,521 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2021-11-22 14:43:50,521 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:44:06,302 INFO L129 PetriNetUnfolder]: 6367/17760 cut-off events. [2021-11-22 14:44:06,302 INFO L130 PetriNetUnfolder]: For 657194/657194 co-relation queries the response was YES. [2021-11-22 14:44:06,834 INFO L84 FinitePrefix]: Finished finitePrefix Result has 154486 conditions, 17760 events. 6367/17760 cut-off events. For 657194/657194 co-relation queries the response was YES. Maximal size of possible extension queue 1240. Compared 208434 event pairs, 926 based on Foata normal form. 8/17584 useless extension candidates. Maximal degree in co-relation 153213. Up to 2429 conditions per place. [2021-11-22 14:44:06,956 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 914 selfloop transitions, 1481 changer transitions 11/2448 dead transitions. [2021-11-22 14:44:06,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 2448 transitions, 64426 flow [2021-11-22 14:44:06,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-22 14:44:06,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-11-22 14:44:06,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4016 transitions. [2021-11-22 14:44:06,964 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7450834879406308 [2021-11-22 14:44:06,964 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4016 transitions. [2021-11-22 14:44:06,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4016 transitions. [2021-11-22 14:44:06,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:44:06,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4016 transitions. [2021-11-22 14:44:06,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 57.371428571428574) internal successors, (4016), 70 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:06,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:06,982 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:06,982 INFO L186 Difference]: Start difference. First operand has 577 places, 2117 transitions, 53869 flow. Second operand 70 states and 4016 transitions. [2021-11-22 14:44:06,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 2448 transitions, 64426 flow