./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX --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 ebb6bba6491ab996b2a2d1f88baf86906cd5ba5ce7e0ad4dc20017ded9089a97 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:39:56,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:39:56,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:39:56,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:39:56,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:39:56,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:39:56,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:39:56,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:39:56,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:39:56,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:39:56,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:39:56,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:39:56,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:39:56,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:39:56,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:39:56,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:39:56,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:39:56,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:39:56,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:39:56,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:39:56,477 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:39:56,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:39:56,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:39:56,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:39:56,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:39:56,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:39:56,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:39:56,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:39:56,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:39:56,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:39:56,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:39:56,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:39:56,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:39:56,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:39:56,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:39:56,513 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:39:56,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:39:56,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:39:56,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:39:56,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:39:56,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:39:56,518 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:39:56,572 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:39:56,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:39:56,573 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:39:56,573 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:39:56,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:39:56,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:39:56,583 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:39:56,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:39:56,584 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:39:56,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:39:56,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:39:56,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:39:56,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:39:56,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:39:56,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:39:56,587 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:39:56,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:39:56,588 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:39:56,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:39:56,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:39:56,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:39:56,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:39:56,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:39:56,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:39:56,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:39:56,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:39:56,591 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:39:56,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:39:56,591 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:39:56,591 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:39:56,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:39:56,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:39:56,592 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_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebb6bba6491ab996b2a2d1f88baf86906cd5ba5ce7e0ad4dc20017ded9089a97 [2021-11-09 09:39:56,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:39:56,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:39:56,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:39:56,992 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:39:56,995 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:39:56,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c [2021-11-09 09:39:57,118 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/data/5e272fb99/17db1e0555ac4bdb8247f9710fed7d4c/FLAG006d0a75a [2021-11-09 09:39:57,701 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:39:57,707 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/sv-benchmarks/c/weaver/bench-exp2x3.wvr.c [2021-11-09 09:39:57,720 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/data/5e272fb99/17db1e0555ac4bdb8247f9710fed7d4c/FLAG006d0a75a [2021-11-09 09:39:57,984 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/data/5e272fb99/17db1e0555ac4bdb8247f9710fed7d4c [2021-11-09 09:39:57,987 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:39:57,996 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:39:57,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:39:57,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:39:58,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:39:58,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:39:57" (1/1) ... [2021-11-09 09:39:58,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62f8e8b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:58, skipping insertion in model container [2021-11-09 09:39:58,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:39:57" (1/1) ... [2021-11-09 09:39:58,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:39:58,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:39:58,206 WARN L228 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_4cb85844-69f6-4458-a97d-5db72223e73d/sv-benchmarks/c/weaver/bench-exp2x3.wvr.c[2237,2250] [2021-11-09 09:39:58,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:39:58,221 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:39:58,248 WARN L228 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_4cb85844-69f6-4458-a97d-5db72223e73d/sv-benchmarks/c/weaver/bench-exp2x3.wvr.c[2237,2250] [2021-11-09 09:39:58,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:39:58,267 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:39:58,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:58 WrapperNode [2021-11-09 09:39:58,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:39:58,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:39:58,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:39:58,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:39:58,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:58" (1/1) ... [2021-11-09 09:39:58,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:58" (1/1) ... [2021-11-09 09:39:58,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:39:58,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:39:58,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:39:58,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:39:58,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:58" (1/1) ... [2021-11-09 09:39:58,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:58" (1/1) ... [2021-11-09 09:39:58,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:58" (1/1) ... [2021-11-09 09:39:58,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:58" (1/1) ... [2021-11-09 09:39:58,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:58" (1/1) ... [2021-11-09 09:39:58,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:58" (1/1) ... [2021-11-09 09:39:58,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:58" (1/1) ... [2021-11-09 09:39:58,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:39:58,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:39:58,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:39:58,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:39:58,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:58" (1/1) ... [2021-11-09 09:39:58,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:39:58,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:39:58,431 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:39:58,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:39:58,482 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-09 09:39:58,482 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-09 09:39:58,482 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-09 09:39:58,483 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-09 09:39:58,483 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-09 09:39:58,483 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-09 09:39:58,484 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-11-09 09:39:58,484 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-11-09 09:39:58,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:39:58,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:39:58,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:39:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:39:58,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:39:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:39:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:39:58,490 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-09 09:39:58,858 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:39:58,859 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-09 09:39:58,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:39:58 BoogieIcfgContainer [2021-11-09 09:39:58,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:39:58,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:39:58,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:39:58,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:39:58,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:39:57" (1/3) ... [2021-11-09 09:39:58,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef159b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:39:58, skipping insertion in model container [2021-11-09 09:39:58,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:58" (2/3) ... [2021-11-09 09:39:58,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef159b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:39:58, skipping insertion in model container [2021-11-09 09:39:58,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:39:58" (3/3) ... [2021-11-09 09:39:58,873 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp2x3.wvr.c [2021-11-09 09:39:58,880 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-09 09:39:58,880 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:39:58,880 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:39:58,881 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-09 09:39:58,928 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,928 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,929 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,929 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,930 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,931 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,931 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,931 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,933 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,933 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,934 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,934 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,935 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,936 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,936 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,936 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,941 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,942 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,947 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,948 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,950 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,951 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:39:58,975 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-11-09 09:39:59,066 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:39:59,087 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 [2021-11-09 09:39:59,091 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-09 09:39:59,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 120 places, 117 transitions, 266 flow [2021-11-09 09:39:59,218 INFO L129 PetriNetUnfolder]: 10/113 cut-off events. [2021-11-09 09:39:59,218 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-11-09 09:39:59,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 113 events. 10/113 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 79. Up to 2 conditions per place. [2021-11-09 09:39:59,232 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 117 transitions, 266 flow [2021-11-09 09:39:59,245 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 101 transitions, 226 flow [2021-11-09 09:39:59,281 INFO L129 PetriNetUnfolder]: 10/100 cut-off events. [2021-11-09 09:39:59,281 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-11-09 09:39:59,282 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:39:59,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:39:59,283 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-09 09:39:59,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:59,301 INFO L85 PathProgramCache]: Analyzing trace with hash -472945191, now seen corresponding path program 1 times [2021-11-09 09:39:59,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:59,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558175361] [2021-11-09 09:39:59,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:59,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:39:59,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:59,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558175361] [2021-11-09 09:39:59,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558175361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:39:59,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:39:59,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:39:59,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400702903] [2021-11-09 09:39:59,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:39:59,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:59,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:39:59,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:39:59,711 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 117 [2021-11-09 09:39:59,718 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 101 transitions, 226 flow. Second operand has 2 states, 2 states have (on average 111.5) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:59,718 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:39:59,718 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 117 [2021-11-09 09:39:59,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:39:59,763 INFO L129 PetriNetUnfolder]: 4/95 cut-off events. [2021-11-09 09:39:59,764 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-11-09 09:39:59,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 95 events. 4/95 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 38 event pairs, 0 based on Foata normal form. 6/95 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2021-11-09 09:39:59,767 INFO L132 encePairwiseOnDemand]: 111/117 looper letters, 0 selfloop transitions, 0 changer transitions 2/95 dead transitions. [2021-11-09 09:39:59,768 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 95 transitions, 214 flow [2021-11-09 09:39:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:39:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-09 09:39:59,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 226 transitions. [2021-11-09 09:39:59,784 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9658119658119658 [2021-11-09 09:39:59,785 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 226 transitions. [2021-11-09 09:39:59,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 226 transitions. [2021-11-09 09:39:59,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:39:59,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 226 transitions. [2021-11-09 09:39:59,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:59,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:59,803 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:59,805 INFO L186 Difference]: Start difference. First operand has 104 places, 101 transitions, 226 flow. Second operand 2 states and 226 transitions. [2021-11-09 09:39:59,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 95 transitions, 214 flow [2021-11-09 09:39:59,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 95 transitions, 198 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-11-09 09:39:59,816 INFO L242 Difference]: Finished difference. Result has 97 places, 93 transitions, 194 flow [2021-11-09 09:39:59,819 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=194, PETRI_PLACES=97, PETRI_TRANSITIONS=93} [2021-11-09 09:39:59,820 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, -7 predicate places. [2021-11-09 09:39:59,821 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 93 transitions, 194 flow [2021-11-09 09:39:59,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 111.5) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:59,821 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:39:59,822 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:39:59,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:39:59,837 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-09 09:39:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:59,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1390281116, now seen corresponding path program 1 times [2021-11-09 09:39:59,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:59,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873422216] [2021-11-09 09:39:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:59,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:00,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:00,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873422216] [2021-11-09 09:40:00,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873422216] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:00,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:00,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:40:00,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780652909] [2021-11-09 09:40:00,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:40:00,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:00,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:40:00,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:40:00,575 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 117 [2021-11-09 09:40:00,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 93 transitions, 194 flow. Second operand has 7 states, 7 states have (on average 82.85714285714286) internal successors, (580), 7 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:00,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:40:00,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 117 [2021-11-09 09:40:00,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:40:01,050 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([288] L62-1-->L63: Formula: (< (mod v_~x4~0_6 4294967296) (mod v_~n~0_10 4294967296)) InVars {~n~0=v_~n~0_10, ~x4~0=v_~x4~0_6} OutVars{~n~0=v_~n~0_10, ~x4~0=v_~x4~0_6} AuxVars[] AssignedVars[][81], [40#L54-1true, 123#true, 21#L38-1true, 6#L63true, 100#L46-1true, 36#L85-4true, 126#true]) [2021-11-09 09:40:01,051 INFO L384 tUnfolder$Statistics]: this new event has 57 ancestors and is cut-off event [2021-11-09 09:40:01,051 INFO L387 tUnfolder$Statistics]: existing Event has 57 ancestors and is cut-off event [2021-11-09 09:40:01,051 INFO L387 tUnfolder$Statistics]: existing Event has 57 ancestors and is cut-off event [2021-11-09 09:40:01,053 INFO L387 tUnfolder$Statistics]: existing Event has 57 ancestors and is cut-off event [2021-11-09 09:40:01,053 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([287] L62-1-->L62-2: Formula: (not (< (mod v_~x4~0_5 4294967296) (mod v_~n~0_9 4294967296))) InVars {~n~0=v_~n~0_9, ~x4~0=v_~x4~0_5} OutVars{~n~0=v_~n~0_9, ~x4~0=v_~x4~0_5} AuxVars[] AssignedVars[][82], [40#L54-1true, 70#L62-2true, 123#true, 21#L38-1true, 100#L46-1true, 36#L85-4true, 126#true]) [2021-11-09 09:40:01,053 INFO L384 tUnfolder$Statistics]: this new event has 57 ancestors and is cut-off event [2021-11-09 09:40:01,054 INFO L387 tUnfolder$Statistics]: existing Event has 57 ancestors and is cut-off event [2021-11-09 09:40:01,055 INFO L387 tUnfolder$Statistics]: existing Event has 57 ancestors and is cut-off event [2021-11-09 09:40:01,055 INFO L387 tUnfolder$Statistics]: existing Event has 57 ancestors and is cut-off event [2021-11-09 09:40:01,067 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([288] L62-1-->L63: Formula: (< (mod v_~x4~0_6 4294967296) (mod v_~n~0_10 4294967296)) InVars {~n~0=v_~n~0_10, ~x4~0=v_~x4~0_6} OutVars{~n~0=v_~n~0_10, ~x4~0=v_~x4~0_6} AuxVars[] AssignedVars[][81], [40#L54-1true, 112#L39true, 123#true, 6#L63true, 100#L46-1true, 36#L85-4true, 126#true]) [2021-11-09 09:40:01,067 INFO L384 tUnfolder$Statistics]: this new event has 58 ancestors and is cut-off event [2021-11-09 09:40:01,067 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:01,068 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:01,068 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:01,068 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([287] L62-1-->L62-2: Formula: (not (< (mod v_~x4~0_5 4294967296) (mod v_~n~0_9 4294967296))) InVars {~n~0=v_~n~0_9, ~x4~0=v_~x4~0_5} OutVars{~n~0=v_~n~0_9, ~x4~0=v_~x4~0_5} AuxVars[] AssignedVars[][82], [40#L54-1true, 112#L39true, 70#L62-2true, 123#true, 100#L46-1true, 36#L85-4true, 126#true]) [2021-11-09 09:40:01,069 INFO L384 tUnfolder$Statistics]: this new event has 58 ancestors and is cut-off event [2021-11-09 09:40:01,069 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:01,069 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:01,069 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:01,076 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([288] L62-1-->L63: Formula: (< (mod v_~x4~0_6 4294967296) (mod v_~n~0_10 4294967296)) InVars {~n~0=v_~n~0_10, ~x4~0=v_~x4~0_6} OutVars{~n~0=v_~n~0_10, ~x4~0=v_~x4~0_6} AuxVars[] AssignedVars[][81], [40#L54-1true, 123#true, 6#L63true, 100#L46-1true, 64#L38-2true, 36#L85-4true, 126#true]) [2021-11-09 09:40:01,077 INFO L384 tUnfolder$Statistics]: this new event has 58 ancestors and is cut-off event [2021-11-09 09:40:01,077 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:01,077 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:01,078 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:01,078 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([287] L62-1-->L62-2: Formula: (not (< (mod v_~x4~0_5 4294967296) (mod v_~n~0_9 4294967296))) InVars {~n~0=v_~n~0_9, ~x4~0=v_~x4~0_5} OutVars{~n~0=v_~n~0_9, ~x4~0=v_~x4~0_5} AuxVars[] AssignedVars[][82], [40#L54-1true, 70#L62-2true, 123#true, 100#L46-1true, 64#L38-2true, 36#L85-4true, 126#true]) [2021-11-09 09:40:01,078 INFO L384 tUnfolder$Statistics]: this new event has 58 ancestors and is cut-off event [2021-11-09 09:40:01,079 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:01,079 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:01,080 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:01,276 INFO L129 PetriNetUnfolder]: 658/1223 cut-off events. [2021-11-09 09:40:01,276 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 09:40:01,286 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2107 conditions, 1223 events. 658/1223 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 5928 event pairs, 136 based on Foata normal form. 1/820 useless extension candidates. Maximal degree in co-relation 2104. Up to 655 conditions per place. [2021-11-09 09:40:01,305 INFO L132 encePairwiseOnDemand]: 107/117 looper letters, 33 selfloop transitions, 7 changer transitions 3/108 dead transitions. [2021-11-09 09:40:01,306 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 108 transitions, 310 flow [2021-11-09 09:40:01,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:40:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-09 09:40:01,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 604 transitions. [2021-11-09 09:40:01,318 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7374847374847375 [2021-11-09 09:40:01,318 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 604 transitions. [2021-11-09 09:40:01,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 604 transitions. [2021-11-09 09:40:01,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:40:01,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 604 transitions. [2021-11-09 09:40:01,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:01,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:01,335 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:01,336 INFO L186 Difference]: Start difference. First operand has 97 places, 93 transitions, 194 flow. Second operand 7 states and 604 transitions. [2021-11-09 09:40:01,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 108 transitions, 310 flow [2021-11-09 09:40:01,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 108 transitions, 310 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-09 09:40:01,345 INFO L242 Difference]: Finished difference. Result has 104 places, 97 transitions, 235 flow [2021-11-09 09:40:01,345 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=235, PETRI_PLACES=104, PETRI_TRANSITIONS=97} [2021-11-09 09:40:01,346 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 0 predicate places. [2021-11-09 09:40:01,346 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 97 transitions, 235 flow [2021-11-09 09:40:01,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.85714285714286) internal successors, (580), 7 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:01,348 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:40:01,348 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:01,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:40:01,349 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-09 09:40:01,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1110917350, now seen corresponding path program 1 times [2021-11-09 09:40:01,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:01,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956217528] [2021-11-09 09:40:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:01,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:01,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:01,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956217528] [2021-11-09 09:40:01,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956217528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:01,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:01,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:40:01,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100150523] [2021-11-09 09:40:01,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:40:01,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:01,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:40:01,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:40:01,986 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 117 [2021-11-09 09:40:01,987 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 97 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 82.0) internal successors, (492), 6 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:01,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:40:01,988 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 117 [2021-11-09 09:40:01,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:40:02,287 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([288] L62-1-->L63: Formula: (< (mod v_~x4~0_6 4294967296) (mod v_~n~0_10 4294967296)) InVars {~n~0=v_~n~0_10, ~x4~0=v_~x4~0_6} OutVars{~n~0=v_~n~0_10, ~x4~0=v_~x4~0_6} AuxVars[] AssignedVars[][86], [40#L54-1true, 143#true, 123#true, 21#L38-1true, 6#L63true, 100#L46-1true, 36#L85-4true, Black: 130#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), Black: 136#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond| 0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 126#true, Black: 138#(and (= ULTIMATE.start_assume_abort_if_not_~cond 0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond| 0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296)))))]) [2021-11-09 09:40:02,288 INFO L384 tUnfolder$Statistics]: this new event has 57 ancestors and is cut-off event [2021-11-09 09:40:02,288 INFO L387 tUnfolder$Statistics]: existing Event has 57 ancestors and is cut-off event [2021-11-09 09:40:02,288 INFO L387 tUnfolder$Statistics]: existing Event has 57 ancestors and is cut-off event [2021-11-09 09:40:02,289 INFO L387 tUnfolder$Statistics]: existing Event has 57 ancestors and is cut-off event [2021-11-09 09:40:02,289 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([287] L62-1-->L62-2: Formula: (not (< (mod v_~x4~0_5 4294967296) (mod v_~n~0_9 4294967296))) InVars {~n~0=v_~n~0_9, ~x4~0=v_~x4~0_5} OutVars{~n~0=v_~n~0_9, ~x4~0=v_~x4~0_5} AuxVars[] AssignedVars[][87], [40#L54-1true, 143#true, 70#L62-2true, 123#true, 21#L38-1true, 100#L46-1true, 36#L85-4true, Black: 130#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), Black: 136#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond| 0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 126#true, Black: 138#(and (= ULTIMATE.start_assume_abort_if_not_~cond 0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond| 0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296)))))]) [2021-11-09 09:40:02,289 INFO L384 tUnfolder$Statistics]: this new event has 57 ancestors and is cut-off event [2021-11-09 09:40:02,289 INFO L387 tUnfolder$Statistics]: existing Event has 57 ancestors and is cut-off event [2021-11-09 09:40:02,290 INFO L387 tUnfolder$Statistics]: existing Event has 57 ancestors and is cut-off event [2021-11-09 09:40:02,290 INFO L387 tUnfolder$Statistics]: existing Event has 57 ancestors and is cut-off event [2021-11-09 09:40:02,297 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([288] L62-1-->L63: Formula: (< (mod v_~x4~0_6 4294967296) (mod v_~n~0_10 4294967296)) InVars {~n~0=v_~n~0_10, ~x4~0=v_~x4~0_6} OutVars{~n~0=v_~n~0_10, ~x4~0=v_~x4~0_6} AuxVars[] AssignedVars[][86], [40#L54-1true, 112#L39true, 143#true, 123#true, 6#L63true, 100#L46-1true, 36#L85-4true, Black: 130#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), Black: 136#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond| 0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 126#true, Black: 138#(and (= ULTIMATE.start_assume_abort_if_not_~cond 0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond| 0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296)))))]) [2021-11-09 09:40:02,298 INFO L384 tUnfolder$Statistics]: this new event has 58 ancestors and is cut-off event [2021-11-09 09:40:02,298 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:02,299 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:02,299 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:02,299 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([287] L62-1-->L62-2: Formula: (not (< (mod v_~x4~0_5 4294967296) (mod v_~n~0_9 4294967296))) InVars {~n~0=v_~n~0_9, ~x4~0=v_~x4~0_5} OutVars{~n~0=v_~n~0_9, ~x4~0=v_~x4~0_5} AuxVars[] AssignedVars[][87], [40#L54-1true, 112#L39true, 143#true, 70#L62-2true, 123#true, 100#L46-1true, 36#L85-4true, Black: 130#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), Black: 136#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond| 0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 126#true, Black: 138#(and (= ULTIMATE.start_assume_abort_if_not_~cond 0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond| 0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296)))))]) [2021-11-09 09:40:02,299 INFO L384 tUnfolder$Statistics]: this new event has 58 ancestors and is cut-off event [2021-11-09 09:40:02,300 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:02,301 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:02,302 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:02,311 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([288] L62-1-->L63: Formula: (< (mod v_~x4~0_6 4294967296) (mod v_~n~0_10 4294967296)) InVars {~n~0=v_~n~0_10, ~x4~0=v_~x4~0_6} OutVars{~n~0=v_~n~0_10, ~x4~0=v_~x4~0_6} AuxVars[] AssignedVars[][86], [40#L54-1true, 143#true, 6#L63true, 123#true, 100#L46-1true, 64#L38-2true, 36#L85-4true, Black: 130#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), Black: 136#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond| 0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 126#true, Black: 138#(and (= ULTIMATE.start_assume_abort_if_not_~cond 0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond| 0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296)))))]) [2021-11-09 09:40:02,312 INFO L384 tUnfolder$Statistics]: this new event has 58 ancestors and is cut-off event [2021-11-09 09:40:02,312 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:02,312 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:02,312 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:02,313 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([287] L62-1-->L62-2: Formula: (not (< (mod v_~x4~0_5 4294967296) (mod v_~n~0_9 4294967296))) InVars {~n~0=v_~n~0_9, ~x4~0=v_~x4~0_5} OutVars{~n~0=v_~n~0_9, ~x4~0=v_~x4~0_5} AuxVars[] AssignedVars[][87], [40#L54-1true, 143#true, 70#L62-2true, 123#true, 100#L46-1true, 64#L38-2true, 36#L85-4true, Black: 130#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), Black: 136#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond| 0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 126#true, Black: 138#(and (= ULTIMATE.start_assume_abort_if_not_~cond 0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= |ULTIMATE.start_assume_abort_if_not_#in~cond| 0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296)))))]) [2021-11-09 09:40:02,314 INFO L384 tUnfolder$Statistics]: this new event has 58 ancestors and is cut-off event [2021-11-09 09:40:02,314 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:02,314 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:02,322 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:02,439 INFO L129 PetriNetUnfolder]: 640/1129 cut-off events. [2021-11-09 09:40:02,439 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2021-11-09 09:40:02,457 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2362 conditions, 1129 events. 640/1129 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 5147 event pairs, 67 based on Foata normal form. 0/749 useless extension candidates. Maximal degree in co-relation 2355. Up to 657 conditions per place. [2021-11-09 09:40:02,471 INFO L132 encePairwiseOnDemand]: 106/117 looper letters, 39 selfloop transitions, 11 changer transitions 0/113 dead transitions. [2021-11-09 09:40:02,472 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 373 flow [2021-11-09 09:40:02,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:40:02,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-09 09:40:02,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 520 transitions. [2021-11-09 09:40:02,475 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2021-11-09 09:40:02,476 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 520 transitions. [2021-11-09 09:40:02,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 520 transitions. [2021-11-09 09:40:02,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:40:02,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 520 transitions. [2021-11-09 09:40:02,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.66666666666667) internal successors, (520), 6 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:02,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 117.0) internal successors, (819), 7 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:02,483 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 117.0) internal successors, (819), 7 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:02,483 INFO L186 Difference]: Start difference. First operand has 104 places, 97 transitions, 235 flow. Second operand 6 states and 520 transitions. [2021-11-09 09:40:02,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 373 flow [2021-11-09 09:40:02,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 113 transitions, 358 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-11-09 09:40:02,499 INFO L242 Difference]: Finished difference. Result has 104 places, 101 transitions, 275 flow [2021-11-09 09:40:02,499 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=275, PETRI_PLACES=104, PETRI_TRANSITIONS=101} [2021-11-09 09:40:02,500 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 0 predicate places. [2021-11-09 09:40:02,500 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 101 transitions, 275 flow [2021-11-09 09:40:02,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.0) internal successors, (492), 6 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:02,502 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:40:02,502 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:02,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:40:02,503 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-09 09:40:02,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:02,504 INFO L85 PathProgramCache]: Analyzing trace with hash 900706124, now seen corresponding path program 2 times [2021-11-09 09:40:02,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:02,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491190853] [2021-11-09 09:40:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:02,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:02,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:02,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491190853] [2021-11-09 09:40:02,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491190853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:02,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:02,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:40:02,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346318603] [2021-11-09 09:40:02,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:40:02,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:02,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:40:02,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:40:02,918 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 117 [2021-11-09 09:40:02,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 101 transitions, 275 flow. Second operand has 6 states, 6 states have (on average 82.0) internal successors, (492), 6 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:02,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:40:02,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 117 [2021-11-09 09:40:02,920 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:40:03,219 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([288] L62-1-->L63: Formula: (< (mod v_~x4~0_6 4294967296) (mod v_~n~0_10 4294967296)) InVars {~n~0=v_~n~0_10, ~x4~0=v_~x4~0_6} OutVars{~n~0=v_~n~0_10, ~x4~0=v_~x4~0_6} AuxVars[] AssignedVars[][87], [40#L54-1true, 154#true, 143#true, Black: 147#(and (< (* 4294967296 (div ~x3~0 4294967296)) ~x3~0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (< (* 4294967296 (div ~x1~0 4294967296)) ~x1~0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 123#true, Black: 148#(and (< (* 4294967296 (div ~x3~0 4294967296)) ~x3~0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (< (* 4294967296 (div ~x1~0 4294967296)) ~x1~0) (<= (+ ~x2~0 (* 4294967296 (div ~n~0 4294967296)) 1) (+ (* 4294967296 (div ~x2~0 4294967296)) ~n~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 21#L38-1true, 6#L63true, 100#L46-1true, 36#L85-4true, Black: 130#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296)))))]) [2021-11-09 09:40:03,219 INFO L384 tUnfolder$Statistics]: this new event has 57 ancestors and is not cut-off event [2021-11-09 09:40:03,219 INFO L387 tUnfolder$Statistics]: existing Event has 57 ancestors and is not cut-off event [2021-11-09 09:40:03,219 INFO L387 tUnfolder$Statistics]: existing Event has 57 ancestors and is not cut-off event [2021-11-09 09:40:03,220 INFO L387 tUnfolder$Statistics]: existing Event has 57 ancestors and is not cut-off event [2021-11-09 09:40:03,221 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([287] L62-1-->L62-2: Formula: (not (< (mod v_~x4~0_5 4294967296) (mod v_~n~0_9 4294967296))) InVars {~n~0=v_~n~0_9, ~x4~0=v_~x4~0_5} OutVars{~n~0=v_~n~0_9, ~x4~0=v_~x4~0_5} AuxVars[] AssignedVars[][88], [40#L54-1true, 154#true, 143#true, 70#L62-2true, Black: 147#(and (< (* 4294967296 (div ~x3~0 4294967296)) ~x3~0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (< (* 4294967296 (div ~x1~0 4294967296)) ~x1~0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 123#true, Black: 148#(and (< (* 4294967296 (div ~x3~0 4294967296)) ~x3~0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (< (* 4294967296 (div ~x1~0 4294967296)) ~x1~0) (<= (+ ~x2~0 (* 4294967296 (div ~n~0 4294967296)) 1) (+ (* 4294967296 (div ~x2~0 4294967296)) ~n~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 21#L38-1true, 100#L46-1true, 36#L85-4true, Black: 130#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296)))))]) [2021-11-09 09:40:03,222 INFO L384 tUnfolder$Statistics]: this new event has 57 ancestors and is not cut-off event [2021-11-09 09:40:03,222 INFO L387 tUnfolder$Statistics]: existing Event has 57 ancestors and is not cut-off event [2021-11-09 09:40:03,222 INFO L387 tUnfolder$Statistics]: existing Event has 57 ancestors and is not cut-off event [2021-11-09 09:40:03,222 INFO L387 tUnfolder$Statistics]: existing Event has 57 ancestors and is not cut-off event [2021-11-09 09:40:03,227 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([288] L62-1-->L63: Formula: (< (mod v_~x4~0_6 4294967296) (mod v_~n~0_10 4294967296)) InVars {~n~0=v_~n~0_10, ~x4~0=v_~x4~0_6} OutVars{~n~0=v_~n~0_10, ~x4~0=v_~x4~0_6} AuxVars[] AssignedVars[][87], [40#L54-1true, 112#L39true, 154#true, 143#true, Black: 147#(and (< (* 4294967296 (div ~x3~0 4294967296)) ~x3~0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (< (* 4294967296 (div ~x1~0 4294967296)) ~x1~0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 123#true, Black: 148#(and (< (* 4294967296 (div ~x3~0 4294967296)) ~x3~0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (< (* 4294967296 (div ~x1~0 4294967296)) ~x1~0) (<= (+ ~x2~0 (* 4294967296 (div ~n~0 4294967296)) 1) (+ (* 4294967296 (div ~x2~0 4294967296)) ~n~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 6#L63true, 100#L46-1true, 36#L85-4true, Black: 130#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296)))))]) [2021-11-09 09:40:03,227 INFO L384 tUnfolder$Statistics]: this new event has 58 ancestors and is cut-off event [2021-11-09 09:40:03,228 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:03,228 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:03,228 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:03,228 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([287] L62-1-->L62-2: Formula: (not (< (mod v_~x4~0_5 4294967296) (mod v_~n~0_9 4294967296))) InVars {~n~0=v_~n~0_9, ~x4~0=v_~x4~0_5} OutVars{~n~0=v_~n~0_9, ~x4~0=v_~x4~0_5} AuxVars[] AssignedVars[][88], [40#L54-1true, 112#L39true, 154#true, 143#true, Black: 147#(and (< (* 4294967296 (div ~x3~0 4294967296)) ~x3~0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (< (* 4294967296 (div ~x1~0 4294967296)) ~x1~0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 70#L62-2true, 123#true, Black: 148#(and (< (* 4294967296 (div ~x3~0 4294967296)) ~x3~0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (< (* 4294967296 (div ~x1~0 4294967296)) ~x1~0) (<= (+ ~x2~0 (* 4294967296 (div ~n~0 4294967296)) 1) (+ (* 4294967296 (div ~x2~0 4294967296)) ~n~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 100#L46-1true, 36#L85-4true, Black: 130#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296)))))]) [2021-11-09 09:40:03,228 INFO L384 tUnfolder$Statistics]: this new event has 58 ancestors and is cut-off event [2021-11-09 09:40:03,229 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:03,229 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:03,229 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:03,233 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([288] L62-1-->L63: Formula: (< (mod v_~x4~0_6 4294967296) (mod v_~n~0_10 4294967296)) InVars {~n~0=v_~n~0_10, ~x4~0=v_~x4~0_6} OutVars{~n~0=v_~n~0_10, ~x4~0=v_~x4~0_6} AuxVars[] AssignedVars[][87], [40#L54-1true, 154#true, 143#true, Black: 147#(and (< (* 4294967296 (div ~x3~0 4294967296)) ~x3~0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (< (* 4294967296 (div ~x1~0 4294967296)) ~x1~0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), Black: 148#(and (< (* 4294967296 (div ~x3~0 4294967296)) ~x3~0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (< (* 4294967296 (div ~x1~0 4294967296)) ~x1~0) (<= (+ ~x2~0 (* 4294967296 (div ~n~0 4294967296)) 1) (+ (* 4294967296 (div ~x2~0 4294967296)) ~n~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 123#true, 6#L63true, 64#L38-2true, 100#L46-1true, 36#L85-4true, Black: 130#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296)))))]) [2021-11-09 09:40:03,233 INFO L384 tUnfolder$Statistics]: this new event has 58 ancestors and is cut-off event [2021-11-09 09:40:03,233 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:03,234 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:03,234 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:03,234 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([287] L62-1-->L62-2: Formula: (not (< (mod v_~x4~0_5 4294967296) (mod v_~n~0_9 4294967296))) InVars {~n~0=v_~n~0_9, ~x4~0=v_~x4~0_5} OutVars{~n~0=v_~n~0_9, ~x4~0=v_~x4~0_5} AuxVars[] AssignedVars[][88], [40#L54-1true, 154#true, 143#true, Black: 147#(and (< (* 4294967296 (div ~x3~0 4294967296)) ~x3~0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (< (* 4294967296 (div ~x1~0 4294967296)) ~x1~0) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 70#L62-2true, Black: 148#(and (< (* 4294967296 (div ~x3~0 4294967296)) ~x3~0) (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (< (* 4294967296 (div ~x1~0 4294967296)) ~x1~0) (<= (+ ~x2~0 (* 4294967296 (div ~n~0 4294967296)) 1) (+ (* 4294967296 (div ~x2~0 4294967296)) ~n~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296))))), 123#true, 64#L38-2true, 100#L46-1true, 36#L85-4true, Black: 130#(and (= (+ (* 4294967296 (div ~x3~0 4294967296)) ~x4~0) (+ (* 4294967296 (div ~x4~0 4294967296)) ~x3~0)) (= (+ (* 4294967296 (div ~x2~0 4294967296)) ~x1~0) (+ ~x2~0 (* 4294967296 (div ~x1~0 4294967296)))))]) [2021-11-09 09:40:03,234 INFO L384 tUnfolder$Statistics]: this new event has 58 ancestors and is cut-off event [2021-11-09 09:40:03,234 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:03,235 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:03,235 INFO L387 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2021-11-09 09:40:03,339 INFO L129 PetriNetUnfolder]: 589/1075 cut-off events. [2021-11-09 09:40:03,340 INFO L130 PetriNetUnfolder]: For 512/561 co-relation queries the response was YES. [2021-11-09 09:40:03,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2507 conditions, 1075 events. 589/1075 cut-off events. For 512/561 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5076 event pairs, 208 based on Foata normal form. 20/850 useless extension candidates. Maximal degree in co-relation 2500. Up to 627 conditions per place. [2021-11-09 09:40:03,362 INFO L132 encePairwiseOnDemand]: 106/117 looper letters, 41 selfloop transitions, 13 changer transitions 0/117 dead transitions. [2021-11-09 09:40:03,363 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 117 transitions, 437 flow [2021-11-09 09:40:03,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:40:03,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-09 09:40:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 520 transitions. [2021-11-09 09:40:03,366 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2021-11-09 09:40:03,366 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 520 transitions. [2021-11-09 09:40:03,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 520 transitions. [2021-11-09 09:40:03,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:40:03,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 520 transitions. [2021-11-09 09:40:03,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.66666666666667) internal successors, (520), 6 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:03,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 117.0) internal successors, (819), 7 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:03,375 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 117.0) internal successors, (819), 7 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:03,375 INFO L186 Difference]: Start difference. First operand has 104 places, 101 transitions, 275 flow. Second operand 6 states and 520 transitions. [2021-11-09 09:40:03,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 117 transitions, 437 flow [2021-11-09 09:40:03,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 117 transitions, 415 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-09 09:40:03,383 INFO L242 Difference]: Finished difference. Result has 107 places, 105 transitions, 322 flow [2021-11-09 09:40:03,383 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=322, PETRI_PLACES=107, PETRI_TRANSITIONS=105} [2021-11-09 09:40:03,383 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 3 predicate places. [2021-11-09 09:40:03,384 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 105 transitions, 322 flow [2021-11-09 09:40:03,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.0) internal successors, (492), 6 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:03,384 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:40:03,385 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:03,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:40:03,385 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-09 09:40:03,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:03,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1824356216, now seen corresponding path program 3 times [2021-11-09 09:40:03,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:03,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576641073] [2021-11-09 09:40:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:03,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:03,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:03,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576641073] [2021-11-09 09:40:03,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576641073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:03,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954243715] [2021-11-09 09:40:03,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:40:03,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:03,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:03,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:03,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:40:03,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:40:03,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:40:03,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:40:03,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:04,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954243715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:04,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:04,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-09 09:40:04,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879849327] [2021-11-09 09:40:04,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:40:04,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:04,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:40:04,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:40:04,861 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 117 [2021-11-09 09:40:04,863 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 105 transitions, 322 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:04,863 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:40:04,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 117 [2021-11-09 09:40:04,864 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:40:06,153 INFO L129 PetriNetUnfolder]: 1243/2154 cut-off events. [2021-11-09 09:40:06,153 INFO L130 PetriNetUnfolder]: For 1354/1432 co-relation queries the response was YES. [2021-11-09 09:40:06,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5286 conditions, 2154 events. 1243/2154 cut-off events. For 1354/1432 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 11504 event pairs, 321 based on Foata normal form. 67/1740 useless extension candidates. Maximal degree in co-relation 5277. Up to 498 conditions per place. [2021-11-09 09:40:06,239 INFO L132 encePairwiseOnDemand]: 104/117 looper letters, 80 selfloop transitions, 22 changer transitions 0/165 dead transitions. [2021-11-09 09:40:06,239 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 165 transitions, 718 flow [2021-11-09 09:40:06,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:40:06,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-09 09:40:06,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 959 transitions. [2021-11-09 09:40:06,245 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7451437451437452 [2021-11-09 09:40:06,245 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 959 transitions. [2021-11-09 09:40:06,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 959 transitions. [2021-11-09 09:40:06,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:40:06,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 959 transitions. [2021-11-09 09:40:06,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 87.18181818181819) internal successors, (959), 11 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:06,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 117.0) internal successors, (1404), 12 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:06,255 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 117.0) internal successors, (1404), 12 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:06,256 INFO L186 Difference]: Start difference. First operand has 107 places, 105 transitions, 322 flow. Second operand 11 states and 959 transitions. [2021-11-09 09:40:06,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 165 transitions, 718 flow [2021-11-09 09:40:06,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 165 transitions, 689 flow, removed 8 selfloop flow, removed 3 redundant places. [2021-11-09 09:40:06,272 INFO L242 Difference]: Finished difference. Result has 119 places, 113 transitions, 420 flow [2021-11-09 09:40:06,273 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=420, PETRI_PLACES=119, PETRI_TRANSITIONS=113} [2021-11-09 09:40:06,273 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 15 predicate places. [2021-11-09 09:40:06,273 INFO L470 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 420 flow [2021-11-09 09:40:06,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:06,276 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:40:06,277 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:06,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:06,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:06,492 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-09 09:40:06,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:06,493 INFO L85 PathProgramCache]: Analyzing trace with hash -587457308, now seen corresponding path program 1 times [2021-11-09 09:40:06,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:06,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685230544] [2021-11-09 09:40:06,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:06,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:06,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:06,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685230544] [2021-11-09 09:40:06,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685230544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:06,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:06,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:40:06,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355302188] [2021-11-09 09:40:06,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:40:06,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:06,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:40:06,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:40:06,820 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 117 [2021-11-09 09:40:06,821 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 113 transitions, 420 flow. Second operand has 7 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:06,821 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:40:06,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 117 [2021-11-09 09:40:06,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:40:07,570 INFO L129 PetriNetUnfolder]: 1479/2636 cut-off events. [2021-11-09 09:40:07,571 INFO L130 PetriNetUnfolder]: For 3617/3671 co-relation queries the response was YES. [2021-11-09 09:40:07,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7610 conditions, 2636 events. 1479/2636 cut-off events. For 3617/3671 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14508 event pairs, 210 based on Foata normal form. 3/2111 useless extension candidates. Maximal degree in co-relation 7597. Up to 959 conditions per place. [2021-11-09 09:40:07,675 INFO L132 encePairwiseOnDemand]: 106/117 looper letters, 75 selfloop transitions, 17 changer transitions 0/155 dead transitions. [2021-11-09 09:40:07,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 155 transitions, 852 flow [2021-11-09 09:40:07,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:40:07,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-09 09:40:07,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 613 transitions. [2021-11-09 09:40:07,682 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7484737484737485 [2021-11-09 09:40:07,682 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 613 transitions. [2021-11-09 09:40:07,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 613 transitions. [2021-11-09 09:40:07,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:40:07,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 613 transitions. [2021-11-09 09:40:07,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.57142857142857) internal successors, (613), 7 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:07,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:07,691 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:07,691 INFO L186 Difference]: Start difference. First operand has 119 places, 113 transitions, 420 flow. Second operand 7 states and 613 transitions. [2021-11-09 09:40:07,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 155 transitions, 852 flow [2021-11-09 09:40:07,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 155 transitions, 821 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-11-09 09:40:07,722 INFO L242 Difference]: Finished difference. Result has 125 places, 118 transitions, 499 flow [2021-11-09 09:40:07,723 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=499, PETRI_PLACES=125, PETRI_TRANSITIONS=118} [2021-11-09 09:40:07,723 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 21 predicate places. [2021-11-09 09:40:07,723 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 118 transitions, 499 flow [2021-11-09 09:40:07,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:07,724 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:40:07,725 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:07,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:40:07,725 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-09 09:40:07,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:07,726 INFO L85 PathProgramCache]: Analyzing trace with hash -315484420, now seen corresponding path program 2 times [2021-11-09 09:40:07,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:07,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380656678] [2021-11-09 09:40:07,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:07,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:08,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:08,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380656678] [2021-11-09 09:40:08,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380656678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:08,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:08,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:40:08,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025660947] [2021-11-09 09:40:08,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:40:08,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:08,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:40:08,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:40:08,066 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 117 [2021-11-09 09:40:08,067 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 118 transitions, 499 flow. Second operand has 6 states, 6 states have (on average 82.0) internal successors, (492), 6 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:08,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:40:08,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 117 [2021-11-09 09:40:08,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:40:08,761 INFO L129 PetriNetUnfolder]: 1290/2375 cut-off events. [2021-11-09 09:40:08,762 INFO L130 PetriNetUnfolder]: For 4938/16114 co-relation queries the response was YES. [2021-11-09 09:40:08,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7824 conditions, 2375 events. 1290/2375 cut-off events. For 4938/16114 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 13590 event pairs, 337 based on Foata normal form. 17/2113 useless extension candidates. Maximal degree in co-relation 7807. Up to 1630 conditions per place. [2021-11-09 09:40:08,811 INFO L132 encePairwiseOnDemand]: 106/117 looper letters, 54 selfloop transitions, 17 changer transitions 4/138 dead transitions. [2021-11-09 09:40:08,811 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 138 transitions, 793 flow [2021-11-09 09:40:08,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:40:08,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-09 09:40:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 520 transitions. [2021-11-09 09:40:08,815 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2021-11-09 09:40:08,815 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 520 transitions. [2021-11-09 09:40:08,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 520 transitions. [2021-11-09 09:40:08,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:40:08,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 520 transitions. [2021-11-09 09:40:08,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.66666666666667) internal successors, (520), 6 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:08,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 117.0) internal successors, (819), 7 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:08,823 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 117.0) internal successors, (819), 7 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:08,824 INFO L186 Difference]: Start difference. First operand has 125 places, 118 transitions, 499 flow. Second operand 6 states and 520 transitions. [2021-11-09 09:40:08,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 138 transitions, 793 flow [2021-11-09 09:40:08,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 138 transitions, 789 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-09 09:40:08,843 INFO L242 Difference]: Finished difference. Result has 130 places, 122 transitions, 590 flow [2021-11-09 09:40:08,843 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=590, PETRI_PLACES=130, PETRI_TRANSITIONS=122} [2021-11-09 09:40:08,844 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 26 predicate places. [2021-11-09 09:40:08,844 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 122 transitions, 590 flow [2021-11-09 09:40:08,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.0) internal successors, (492), 6 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:08,845 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:40:08,845 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:08,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:40:08,847 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-09 09:40:08,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:08,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1564713910, now seen corresponding path program 1 times [2021-11-09 09:40:08,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:08,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760479966] [2021-11-09 09:40:08,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:08,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:09,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:09,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760479966] [2021-11-09 09:40:09,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760479966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:09,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:09,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:40:09,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873170386] [2021-11-09 09:40:09,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:40:09,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:09,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:40:09,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:40:09,225 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 117 [2021-11-09 09:40:09,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 122 transitions, 590 flow. Second operand has 7 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:09,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:40:09,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 117 [2021-11-09 09:40:09,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:40:10,056 INFO L129 PetriNetUnfolder]: 1517/2685 cut-off events. [2021-11-09 09:40:10,057 INFO L130 PetriNetUnfolder]: For 6962/22982 co-relation queries the response was YES. [2021-11-09 09:40:10,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9548 conditions, 2685 events. 1517/2685 cut-off events. For 6962/22982 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 14835 event pairs, 332 based on Foata normal form. 98/2511 useless extension candidates. Maximal degree in co-relation 9528. Up to 1102 conditions per place. [2021-11-09 09:40:10,122 INFO L132 encePairwiseOnDemand]: 107/117 looper letters, 73 selfloop transitions, 19 changer transitions 0/155 dead transitions. [2021-11-09 09:40:10,122 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 155 transitions, 1002 flow [2021-11-09 09:40:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:40:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-09 09:40:10,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 607 transitions. [2021-11-09 09:40:10,127 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7411477411477412 [2021-11-09 09:40:10,127 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 607 transitions. [2021-11-09 09:40:10,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 607 transitions. [2021-11-09 09:40:10,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:40:10,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 607 transitions. [2021-11-09 09:40:10,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 86.71428571428571) internal successors, (607), 7 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:10,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:10,135 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:10,136 INFO L186 Difference]: Start difference. First operand has 130 places, 122 transitions, 590 flow. Second operand 7 states and 607 transitions. [2021-11-09 09:40:10,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 155 transitions, 1002 flow [2021-11-09 09:40:10,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 155 transitions, 973 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-11-09 09:40:10,167 INFO L242 Difference]: Finished difference. Result has 135 places, 123 transitions, 630 flow [2021-11-09 09:40:10,167 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=630, PETRI_PLACES=135, PETRI_TRANSITIONS=123} [2021-11-09 09:40:10,168 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 31 predicate places. [2021-11-09 09:40:10,168 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 123 transitions, 630 flow [2021-11-09 09:40:10,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:10,169 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:40:10,169 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:10,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:40:10,170 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-09 09:40:10,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:10,171 INFO L85 PathProgramCache]: Analyzing trace with hash -378285448, now seen corresponding path program 1 times [2021-11-09 09:40:10,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:10,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809916836] [2021-11-09 09:40:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:10,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:10,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:10,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809916836] [2021-11-09 09:40:10,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809916836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:10,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:10,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:40:10,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507403257] [2021-11-09 09:40:10,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:40:10,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:10,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:40:10,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:40:10,674 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 117 [2021-11-09 09:40:10,676 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 123 transitions, 630 flow. Second operand has 7 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:10,677 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:40:10,677 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 117 [2021-11-09 09:40:10,677 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:40:11,414 INFO L129 PetriNetUnfolder]: 1747/3085 cut-off events. [2021-11-09 09:40:11,415 INFO L130 PetriNetUnfolder]: For 8970/16199 co-relation queries the response was YES. [2021-11-09 09:40:11,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11412 conditions, 3085 events. 1747/3085 cut-off events. For 8970/16199 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 17818 event pairs, 437 based on Foata normal form. 85/2885 useless extension candidates. Maximal degree in co-relation 11391. Up to 1298 conditions per place. [2021-11-09 09:40:11,484 INFO L132 encePairwiseOnDemand]: 107/117 looper letters, 70 selfloop transitions, 21 changer transitions 0/154 dead transitions. [2021-11-09 09:40:11,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 154 transitions, 1030 flow [2021-11-09 09:40:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:40:11,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-09 09:40:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 607 transitions. [2021-11-09 09:40:11,489 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7411477411477412 [2021-11-09 09:40:11,489 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 607 transitions. [2021-11-09 09:40:11,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 607 transitions. [2021-11-09 09:40:11,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:40:11,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 607 transitions. [2021-11-09 09:40:11,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 86.71428571428571) internal successors, (607), 7 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:11,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:11,497 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:11,498 INFO L186 Difference]: Start difference. First operand has 135 places, 123 transitions, 630 flow. Second operand 7 states and 607 transitions. [2021-11-09 09:40:11,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 154 transitions, 1030 flow [2021-11-09 09:40:11,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 154 transitions, 1005 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-09 09:40:11,527 INFO L242 Difference]: Finished difference. Result has 139 places, 124 transitions, 682 flow [2021-11-09 09:40:11,528 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=682, PETRI_PLACES=139, PETRI_TRANSITIONS=124} [2021-11-09 09:40:11,528 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 35 predicate places. [2021-11-09 09:40:11,529 INFO L470 AbstractCegarLoop]: Abstraction has has 139 places, 124 transitions, 682 flow [2021-11-09 09:40:11,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:11,529 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:40:11,530 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:11,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 09:40:11,531 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-09 09:40:11,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:11,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1142906756, now seen corresponding path program 1 times [2021-11-09 09:40:11,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:11,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006301901] [2021-11-09 09:40:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:11,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:12,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:12,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006301901] [2021-11-09 09:40:12,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006301901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:12,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803256341] [2021-11-09 09:40:12,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:12,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:12,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:12,427 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:12,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:40:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:13,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:40:13,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:24,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803256341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:24,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:24,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-11-09 09:40:24,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238476936] [2021-11-09 09:40:24,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:40:24,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:24,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:40:24,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=282, Unknown=2, NotChecked=0, Total=342 [2021-11-09 09:40:24,160 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 117 [2021-11-09 09:40:24,163 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 124 transitions, 682 flow. Second operand has 19 states, 19 states have (on average 80.05263157894737) internal successors, (1521), 19 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:24,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:40:24,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 117 [2021-11-09 09:40:24,164 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:40:33,622 WARN L207 SmtUtils]: Spent 5.41 s on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2021-11-09 09:41:45,370 INFO L129 PetriNetUnfolder]: 2200/3891 cut-off events. [2021-11-09 09:41:45,370 INFO L130 PetriNetUnfolder]: For 14832/28441 co-relation queries the response was YES. [2021-11-09 09:41:45,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15472 conditions, 3891 events. 2200/3891 cut-off events. For 14832/28441 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 24380 event pairs, 530 based on Foata normal form. 69/3574 useless extension candidates. Maximal degree in co-relation 15449. Up to 2461 conditions per place. [2021-11-09 09:41:45,459 INFO L132 encePairwiseOnDemand]: 103/117 looper letters, 90 selfloop transitions, 35 changer transitions 3/191 dead transitions. [2021-11-09 09:41:45,460 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 191 transitions, 1414 flow [2021-11-09 09:41:45,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:41:45,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-09 09:41:45,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1032 transitions. [2021-11-09 09:41:45,465 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7350427350427351 [2021-11-09 09:41:45,466 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1032 transitions. [2021-11-09 09:41:45,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1032 transitions. [2021-11-09 09:41:45,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:41:45,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1032 transitions. [2021-11-09 09:41:45,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 86.0) internal successors, (1032), 12 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:45,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 117.0) internal successors, (1521), 13 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:45,477 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 117.0) internal successors, (1521), 13 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:45,477 INFO L186 Difference]: Start difference. First operand has 139 places, 124 transitions, 682 flow. Second operand 12 states and 1032 transitions. [2021-11-09 09:41:45,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 191 transitions, 1414 flow [2021-11-09 09:41:45,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 191 transitions, 1393 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-09 09:41:45,515 INFO L242 Difference]: Finished difference. Result has 151 places, 142 transitions, 931 flow [2021-11-09 09:41:45,515 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=931, PETRI_PLACES=151, PETRI_TRANSITIONS=142} [2021-11-09 09:41:45,516 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 47 predicate places. [2021-11-09 09:41:45,516 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 142 transitions, 931 flow [2021-11-09 09:41:45,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 80.05263157894737) internal successors, (1521), 19 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:45,517 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:41:45,518 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:45,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-09 09:41:45,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:41:45,724 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-09 09:41:45,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:45,724 INFO L85 PathProgramCache]: Analyzing trace with hash -237402520, now seen corresponding path program 2 times [2021-11-09 09:41:45,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:45,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780519842] [2021-11-09 09:41:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:45,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:46,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:46,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780519842] [2021-11-09 09:41:46,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780519842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:46,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158641401] [2021-11-09 09:41:46,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:41:46,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:46,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:46,609 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:46,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:41:47,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:41:47,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:41:47,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:41:47,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:42:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:42:33,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158641401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:33,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:42:33,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-11-09 09:42:33,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019040409] [2021-11-09 09:42:33,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:42:33,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:42:33,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:42:33,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=268, Unknown=7, NotChecked=0, Total=342 [2021-11-09 09:42:33,059 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 117 [2021-11-09 09:42:33,062 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 142 transitions, 931 flow. Second operand has 19 states, 19 states have (on average 80.05263157894737) internal successors, (1521), 19 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:33,062 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:42:33,063 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 117 [2021-11-09 09:42:33,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:43:26,430 INFO L129 PetriNetUnfolder]: 2458/4547 cut-off events. [2021-11-09 09:43:26,431 INFO L130 PetriNetUnfolder]: For 22075/36597 co-relation queries the response was YES. [2021-11-09 09:43:26,471 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19857 conditions, 4547 events. 2458/4547 cut-off events. For 22075/36597 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 31302 event pairs, 578 based on Foata normal form. 54/4159 useless extension candidates. Maximal degree in co-relation 19828. Up to 2583 conditions per place. [2021-11-09 09:43:26,527 INFO L132 encePairwiseOnDemand]: 102/117 looper letters, 104 selfloop transitions, 59 changer transitions 6/232 dead transitions. [2021-11-09 09:43:26,528 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 232 transitions, 2002 flow [2021-11-09 09:43:26,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:43:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-09 09:43:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1362 transitions. [2021-11-09 09:43:26,538 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7275641025641025 [2021-11-09 09:43:26,539 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1362 transitions. [2021-11-09 09:43:26,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1362 transitions. [2021-11-09 09:43:26,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:43:26,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1362 transitions. [2021-11-09 09:43:26,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 85.125) internal successors, (1362), 16 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:26,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:26,553 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:26,554 INFO L186 Difference]: Start difference. First operand has 151 places, 142 transitions, 931 flow. Second operand 16 states and 1362 transitions. [2021-11-09 09:43:26,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 232 transitions, 2002 flow [2021-11-09 09:43:26,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 232 transitions, 1897 flow, removed 42 selfloop flow, removed 6 redundant places. [2021-11-09 09:43:26,618 INFO L242 Difference]: Finished difference. Result has 165 places, 170 transitions, 1300 flow [2021-11-09 09:43:26,618 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1300, PETRI_PLACES=165, PETRI_TRANSITIONS=170} [2021-11-09 09:43:26,619 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 61 predicate places. [2021-11-09 09:43:26,619 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 170 transitions, 1300 flow [2021-11-09 09:43:26,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 80.05263157894737) internal successors, (1521), 19 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:26,620 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:43:26,621 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:26,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:43:26,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 09:43:26,827 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-09 09:43:26,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:26,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1661262006, now seen corresponding path program 1 times [2021-11-09 09:43:26,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:26,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704188173] [2021-11-09 09:43:26,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:26,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:43:27,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:27,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704188173] [2021-11-09 09:43:27,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704188173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:27,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819241802] [2021-11-09 09:43:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:27,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:27,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:43:27,700 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:43:27,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:43:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:28,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:43:28,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:44:02,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819241802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:02,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:02,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-11-09 09:44:02,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866270353] [2021-11-09 09:44:02,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:44:02,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:02,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:44:02,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=300, Unknown=6, NotChecked=0, Total=380 [2021-11-09 09:44:02,803 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 117 [2021-11-09 09:44:02,805 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 170 transitions, 1300 flow. Second operand has 20 states, 20 states have (on average 79.95) internal successors, (1599), 20 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:02,806 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:44:02,806 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 117 [2021-11-09 09:44:02,806 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:44:36,737 INFO L129 PetriNetUnfolder]: 2662/4803 cut-off events. [2021-11-09 09:44:36,737 INFO L130 PetriNetUnfolder]: For 27202/49381 co-relation queries the response was YES. [2021-11-09 09:44:36,795 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22719 conditions, 4803 events. 2662/4803 cut-off events. For 27202/49381 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 32873 event pairs, 764 based on Foata normal form. 27/4344 useless extension candidates. Maximal degree in co-relation 22684. Up to 3317 conditions per place. [2021-11-09 09:44:36,859 INFO L132 encePairwiseOnDemand]: 104/117 looper letters, 131 selfloop transitions, 28 changer transitions 3/225 dead transitions. [2021-11-09 09:44:36,859 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 225 transitions, 2134 flow [2021-11-09 09:44:36,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:44:36,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-09 09:44:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 939 transitions. [2021-11-09 09:44:36,865 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7296037296037297 [2021-11-09 09:44:36,865 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 939 transitions. [2021-11-09 09:44:36,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 939 transitions. [2021-11-09 09:44:36,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:44:36,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 939 transitions. [2021-11-09 09:44:36,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 85.36363636363636) internal successors, (939), 11 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:36,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 117.0) internal successors, (1404), 12 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:36,877 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 117.0) internal successors, (1404), 12 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:36,877 INFO L186 Difference]: Start difference. First operand has 165 places, 170 transitions, 1300 flow. Second operand 11 states and 939 transitions. [2021-11-09 09:44:36,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 225 transitions, 2134 flow [2021-11-09 09:44:36,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 225 transitions, 2037 flow, removed 31 selfloop flow, removed 9 redundant places. [2021-11-09 09:44:36,979 INFO L242 Difference]: Finished difference. Result has 166 places, 181 transitions, 1403 flow [2021-11-09 09:44:36,980 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1403, PETRI_PLACES=166, PETRI_TRANSITIONS=181} [2021-11-09 09:44:36,980 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 62 predicate places. [2021-11-09 09:44:36,980 INFO L470 AbstractCegarLoop]: Abstraction has has 166 places, 181 transitions, 1403 flow [2021-11-09 09:44:36,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 79.95) internal successors, (1599), 20 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:36,982 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:44:36,982 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:36,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:37,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:37,189 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-09 09:44:37,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:37,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1624490466, now seen corresponding path program 2 times [2021-11-09 09:44:37,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:37,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132539870] [2021-11-09 09:44:37,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:37,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:44:38,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:38,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132539870] [2021-11-09 09:44:38,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132539870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:38,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282765504] [2021-11-09 09:44:38,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:44:38,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:38,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:38,047 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:38,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:44:39,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:44:39,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:39,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:44:39,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:06,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282765504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:06,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:45:06,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-11-09 09:45:06,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68532139] [2021-11-09 09:45:06,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:45:06,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:06,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:45:06,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=264, Unknown=4, NotChecked=0, Total=342 [2021-11-09 09:45:06,695 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 117 [2021-11-09 09:45:06,697 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 181 transitions, 1403 flow. Second operand has 19 states, 19 states have (on average 80.05263157894737) internal successors, (1521), 19 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:06,697 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:45:06,697 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 117 [2021-11-09 09:45:06,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:46:12,987 INFO L129 PetriNetUnfolder]: 3005/5505 cut-off events. [2021-11-09 09:46:12,987 INFO L130 PetriNetUnfolder]: For 33393/56649 co-relation queries the response was YES. [2021-11-09 09:46:13,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26827 conditions, 5505 events. 3005/5505 cut-off events. For 33393/56649 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 38902 event pairs, 740 based on Foata normal form. 23/5030 useless extension candidates. Maximal degree in co-relation 26791. Up to 3465 conditions per place. [2021-11-09 09:46:13,102 INFO L132 encePairwiseOnDemand]: 103/117 looper letters, 148 selfloop transitions, 45 changer transitions 3/259 dead transitions. [2021-11-09 09:46:13,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 259 transitions, 2565 flow [2021-11-09 09:46:13,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:46:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-09 09:46:13,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1036 transitions. [2021-11-09 09:46:13,108 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7378917378917379 [2021-11-09 09:46:13,108 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1036 transitions. [2021-11-09 09:46:13,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1036 transitions. [2021-11-09 09:46:13,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:46:13,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1036 transitions. [2021-11-09 09:46:13,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 86.33333333333333) internal successors, (1036), 12 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:13,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 117.0) internal successors, (1521), 13 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:13,120 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 117.0) internal successors, (1521), 13 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:13,120 INFO L186 Difference]: Start difference. First operand has 166 places, 181 transitions, 1403 flow. Second operand 12 states and 1036 transitions. [2021-11-09 09:46:13,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 259 transitions, 2565 flow [2021-11-09 09:46:13,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 259 transitions, 2498 flow, removed 23 selfloop flow, removed 6 redundant places. [2021-11-09 09:46:13,248 INFO L242 Difference]: Finished difference. Result has 173 places, 200 transitions, 1701 flow [2021-11-09 09:46:13,249 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1701, PETRI_PLACES=173, PETRI_TRANSITIONS=200} [2021-11-09 09:46:13,249 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 69 predicate places. [2021-11-09 09:46:13,249 INFO L470 AbstractCegarLoop]: Abstraction has has 173 places, 200 transitions, 1701 flow [2021-11-09 09:46:13,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 80.05263157894737) internal successors, (1521), 19 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:13,251 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:46:13,251 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:13,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:13,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:13,459 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-09 09:46:13,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:13,460 INFO L85 PathProgramCache]: Analyzing trace with hash 630432578, now seen corresponding path program 3 times [2021-11-09 09:46:13,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:13,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594167469] [2021-11-09 09:46:13,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:13,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:14,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:14,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594167469] [2021-11-09 09:46:14,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594167469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:14,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135341513] [2021-11-09 09:46:14,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:46:14,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:14,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:14,370 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:14,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:46:15,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:46:15,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:15,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:46:15,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:45,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135341513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:45,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:46:45,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-11-09 09:46:45,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800006155] [2021-11-09 09:46:45,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:46:45,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:45,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:46:45,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:46:45,356 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 117 [2021-11-09 09:46:45,358 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 200 transitions, 1701 flow. Second operand has 20 states, 20 states have (on average 79.95) internal successors, (1599), 20 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:45,359 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:46:45,359 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 117 [2021-11-09 09:46:45,359 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:47:49,488 INFO L129 PetriNetUnfolder]: 3544/6542 cut-off events. [2021-11-09 09:47:49,488 INFO L130 PetriNetUnfolder]: For 48273/76349 co-relation queries the response was YES. [2021-11-09 09:47:49,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33701 conditions, 6542 events. 3544/6542 cut-off events. For 48273/76349 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 48901 event pairs, 948 based on Foata normal form. 58/6027 useless extension candidates. Maximal degree in co-relation 33662. Up to 4216 conditions per place. [2021-11-09 09:47:49,639 INFO L132 encePairwiseOnDemand]: 103/117 looper letters, 167 selfloop transitions, 34 changer transitions 3/267 dead transitions. [2021-11-09 09:47:49,639 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 267 transitions, 2792 flow [2021-11-09 09:47:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:47:49,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-09 09:47:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1031 transitions. [2021-11-09 09:47:49,645 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7343304843304843 [2021-11-09 09:47:49,645 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1031 transitions. [2021-11-09 09:47:49,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1031 transitions. [2021-11-09 09:47:49,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:47:49,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1031 transitions. [2021-11-09 09:47:49,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 85.91666666666667) internal successors, (1031), 12 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:49,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 117.0) internal successors, (1521), 13 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:49,657 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 117.0) internal successors, (1521), 13 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:49,657 INFO L186 Difference]: Start difference. First operand has 173 places, 200 transitions, 1701 flow. Second operand 12 states and 1031 transitions. [2021-11-09 09:47:49,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 267 transitions, 2792 flow [2021-11-09 09:47:49,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 267 transitions, 2687 flow, removed 40 selfloop flow, removed 6 redundant places. [2021-11-09 09:47:49,804 INFO L242 Difference]: Finished difference. Result has 181 places, 217 transitions, 1946 flow [2021-11-09 09:47:49,805 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1608, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1946, PETRI_PLACES=181, PETRI_TRANSITIONS=217} [2021-11-09 09:47:49,805 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 77 predicate places. [2021-11-09 09:47:49,805 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 217 transitions, 1946 flow [2021-11-09 09:47:49,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 79.95) internal successors, (1599), 20 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:49,806 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:47:49,807 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:49,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:50,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 09:47:50,016 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-09 09:47:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:50,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1232931020, now seen corresponding path program 3 times [2021-11-09 09:47:50,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:50,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418219554] [2021-11-09 09:47:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:50,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:50,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:50,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418219554] [2021-11-09 09:47:50,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418219554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:50,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853257009] [2021-11-09 09:47:50,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:47:50,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:50,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:50,856 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:50,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:47:58,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:47:58,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:47:58,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:47:58,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:42,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853257009] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:42,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:42,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-11-09 09:48:42,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851486622] [2021-11-09 09:48:42,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:48:42,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:42,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:48:42,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=292, Unknown=12, NotChecked=0, Total=380 [2021-11-09 09:48:42,846 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 117 [2021-11-09 09:48:42,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 217 transitions, 1946 flow. Second operand has 20 states, 20 states have (on average 79.95) internal successors, (1599), 20 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:42,848 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:48:42,848 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 117 [2021-11-09 09:48:42,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:51:06,599 WARN L207 SmtUtils]: Spent 11.15 s on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2021-11-09 09:52:26,052 WARN L207 SmtUtils]: Spent 7.98 s on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-11-09 09:52:36,177 INFO L129 PetriNetUnfolder]: 4902/8755 cut-off events. [2021-11-09 09:52:36,177 INFO L130 PetriNetUnfolder]: For 75210/103295 co-relation queries the response was YES. [2021-11-09 09:52:36,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48194 conditions, 8755 events. 4902/8755 cut-off events. For 75210/103295 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 65645 event pairs, 1108 based on Foata normal form. 30/8187 useless extension candidates. Maximal degree in co-relation 48151. Up to 5290 conditions per place. [2021-11-09 09:52:36,345 INFO L132 encePairwiseOnDemand]: 99/117 looper letters, 242 selfloop transitions, 123 changer transitions 7/435 dead transitions. [2021-11-09 09:52:36,345 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 435 transitions, 5098 flow [2021-11-09 09:52:36,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 09:52:36,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-09 09:52:36,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2162 transitions. [2021-11-09 09:52:36,349 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7391452991452991 [2021-11-09 09:52:36,350 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2162 transitions. [2021-11-09 09:52:36,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2162 transitions. [2021-11-09 09:52:36,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:52:36,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2162 transitions. [2021-11-09 09:52:36,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 86.48) internal successors, (2162), 25 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:36,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 117.0) internal successors, (3042), 26 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:36,366 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 117.0) internal successors, (3042), 26 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:36,366 INFO L186 Difference]: Start difference. First operand has 181 places, 217 transitions, 1946 flow. Second operand 25 states and 2162 transitions. [2021-11-09 09:52:36,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 435 transitions, 5098 flow [2021-11-09 09:52:36,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 435 transitions, 4949 flow, removed 62 selfloop flow, removed 6 redundant places. [2021-11-09 09:52:36,545 INFO L242 Difference]: Finished difference. Result has 211 places, 330 transitions, 3651 flow [2021-11-09 09:52:36,546 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1805, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3651, PETRI_PLACES=211, PETRI_TRANSITIONS=330} [2021-11-09 09:52:36,547 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 107 predicate places. [2021-11-09 09:52:36,547 INFO L470 AbstractCegarLoop]: Abstraction has has 211 places, 330 transitions, 3651 flow [2021-11-09 09:52:36,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 79.95) internal successors, (1599), 20 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:36,548 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:52:36,548 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:36,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:36,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 09:52:36,749 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-09 09:52:36,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:36,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1104603320, now seen corresponding path program 4 times [2021-11-09 09:52:36,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:36,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801857107] [2021-11-09 09:52:36,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:36,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:37,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:37,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801857107] [2021-11-09 09:52:37,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801857107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:37,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892124672] [2021-11-09 09:52:37,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:52:37,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:37,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:37,388 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:37,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:52:38,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:52:38,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:38,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:52:38,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:40,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892124672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:40,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:40,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-11-09 09:52:40,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380668987] [2021-11-09 09:52:40,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:52:40,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:40,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:52:40,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:52:40,748 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 117 [2021-11-09 09:52:40,750 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 330 transitions, 3651 flow. Second operand has 17 states, 17 states have (on average 80.41176470588235) internal successors, (1367), 17 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:40,750 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:52:40,751 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 117 [2021-11-09 09:52:40,751 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:53:03,879 INFO L129 PetriNetUnfolder]: 6142/10956 cut-off events. [2021-11-09 09:53:03,879 INFO L130 PetriNetUnfolder]: For 179729/373257 co-relation queries the response was YES. [2021-11-09 09:53:03,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 76551 conditions, 10956 events. 6142/10956 cut-off events. For 179729/373257 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 85343 event pairs, 581 based on Foata normal form. 205/10542 useless extension candidates. Maximal degree in co-relation 76495. Up to 3096 conditions per place. [2021-11-09 09:53:04,177 INFO L132 encePairwiseOnDemand]: 102/117 looper letters, 380 selfloop transitions, 108 changer transitions 0/551 dead transitions. [2021-11-09 09:53:04,177 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 551 transitions, 7730 flow [2021-11-09 09:53:04,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:53:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-09 09:53:04,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1488 transitions. [2021-11-09 09:53:04,193 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7481146304675717 [2021-11-09 09:53:04,193 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1488 transitions. [2021-11-09 09:53:04,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1488 transitions. [2021-11-09 09:53:04,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:53:04,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1488 transitions. [2021-11-09 09:53:04,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 87.52941176470588) internal successors, (1488), 17 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:04,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 117.0) internal successors, (2106), 18 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:04,204 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 117.0) internal successors, (2106), 18 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:04,204 INFO L186 Difference]: Start difference. First operand has 211 places, 330 transitions, 3651 flow. Second operand 17 states and 1488 transitions. [2021-11-09 09:53:04,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 551 transitions, 7730 flow [2021-11-09 09:53:04,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 551 transitions, 6819 flow, removed 443 selfloop flow, removed 8 redundant places. [2021-11-09 09:53:04,938 INFO L242 Difference]: Finished difference. Result has 220 places, 341 transitions, 3526 flow [2021-11-09 09:53:04,939 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3526, PETRI_PLACES=220, PETRI_TRANSITIONS=341} [2021-11-09 09:53:04,939 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 116 predicate places. [2021-11-09 09:53:04,939 INFO L470 AbstractCegarLoop]: Abstraction has has 220 places, 341 transitions, 3526 flow [2021-11-09 09:53:04,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 80.41176470588235) internal successors, (1367), 17 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:04,940 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:53:04,940 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:04,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:05,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 09:53:05,141 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-09 09:53:05,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:05,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1228006796, now seen corresponding path program 4 times [2021-11-09 09:53:05,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:05,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391489624] [2021-11-09 09:53:05,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:05,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:53:05,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:05,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391489624] [2021-11-09 09:53:05,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391489624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:05,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793342863] [2021-11-09 09:53:05,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:53:05,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:05,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:05,456 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:05,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cb85844-69f6-4458-a97d-5db72223e73d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:53:11,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:53:11,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:11,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 09:53:11,886 INFO L286 TraceCheckSpWp]: Computing forward predicates...