./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY --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 81809963fcaff21fd6241cde97e522447f695a8b323a0a16c5a31b7f82b0f683 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:48:12,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:48:12,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:48:12,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:48:12,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:48:12,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:48:12,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:48:12,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:48:12,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:48:12,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:48:12,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:48:12,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:48:12,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:48:12,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:48:12,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:48:12,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:48:12,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:48:12,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:48:12,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:48:12,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:48:12,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:48:12,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:48:12,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:48:12,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:48:12,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:48:12,441 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:48:12,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:48:12,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:48:12,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:48:12,445 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:48:12,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:48:12,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:48:12,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:48:12,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:48:12,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:48:12,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:48:12,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:48:12,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:48:12,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:48:12,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:48:12,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:48:12,458 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:48:12,490 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:48:12,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:48:12,491 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:48:12,492 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:48:12,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:48:12,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:48:12,494 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:48:12,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:48:12,495 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:48:12,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:48:12,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:48:12,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:48:12,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:48:12,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:48:12,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:48:12,499 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:48:12,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:48:12,500 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:48:12,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:48:12,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:48:12,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:48:12,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:48:12,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:48:12,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:48:12,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:48:12,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:48:12,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:48:12,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:48:12,505 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:48:12,506 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:48:12,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:48:12,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:48:12,507 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_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81809963fcaff21fd6241cde97e522447f695a8b323a0a16c5a31b7f82b0f683 [2021-11-07 07:48:12,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:48:12,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:48:12,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:48:12,820 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:48:12,821 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:48:12,823 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/pthread/triangular-longest-1.i [2021-11-07 07:48:12,897 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/data/6578eb1b0/399fb8410bd1453284ecf7b23a9c559d/FLAGc264f0ca9 [2021-11-07 07:48:13,556 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:48:13,557 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/sv-benchmarks/c/pthread/triangular-longest-1.i [2021-11-07 07:48:13,582 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/data/6578eb1b0/399fb8410bd1453284ecf7b23a9c559d/FLAGc264f0ca9 [2021-11-07 07:48:13,751 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/data/6578eb1b0/399fb8410bd1453284ecf7b23a9c559d [2021-11-07 07:48:13,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:48:13,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:48:13,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:48:13,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:48:13,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:48:13,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:48:13" (1/1) ... [2021-11-07 07:48:13,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39725190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:13, skipping insertion in model container [2021-11-07 07:48:13,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:48:13" (1/1) ... [2021-11-07 07:48:13,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:48:13,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:48:14,299 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_539d4e98-b7a9-4f67-baab-40bd66ad393e/sv-benchmarks/c/pthread/triangular-longest-1.i[30962,30975] [2021-11-07 07:48:14,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:48:14,315 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:48:14,379 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_539d4e98-b7a9-4f67-baab-40bd66ad393e/sv-benchmarks/c/pthread/triangular-longest-1.i[30962,30975] [2021-11-07 07:48:14,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:48:14,434 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:48:14,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:14 WrapperNode [2021-11-07 07:48:14,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:48:14,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:48:14,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:48:14,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:48:14,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:14" (1/1) ... [2021-11-07 07:48:14,459 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:14" (1/1) ... [2021-11-07 07:48:14,482 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:48:14,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:48:14,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:48:14,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:48:14,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:14" (1/1) ... [2021-11-07 07:48:14,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:14" (1/1) ... [2021-11-07 07:48:14,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:14" (1/1) ... [2021-11-07 07:48:14,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:14" (1/1) ... [2021-11-07 07:48:14,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:14" (1/1) ... [2021-11-07 07:48:14,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:14" (1/1) ... [2021-11-07 07:48:14,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:14" (1/1) ... [2021-11-07 07:48:14,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:48:14,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:48:14,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:48:14,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:48:14,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:14" (1/1) ... [2021-11-07 07:48:14,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:48:14,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:14,567 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:48:14,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:48:14,623 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-07 07:48:14,624 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-07 07:48:14,624 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-07 07:48:14,624 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-07 07:48:14,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 07:48:14,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-07 07:48:14,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:48:14,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 07:48:14,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:48:14,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-07 07:48:14,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:48:14,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:48:14,627 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-07 07:48:14,882 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:48:14,882 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-07 07:48:14,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:48:14 BoogieIcfgContainer [2021-11-07 07:48:14,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:48:14,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:48:14,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:48:14,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:48:14,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:48:13" (1/3) ... [2021-11-07 07:48:14,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ac238d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:48:14, skipping insertion in model container [2021-11-07 07:48:14,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:14" (2/3) ... [2021-11-07 07:48:14,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ac238d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:48:14, skipping insertion in model container [2021-11-07 07:48:14,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:48:14" (3/3) ... [2021-11-07 07:48:14,908 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2021-11-07 07:48:14,914 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-07 07:48:14,914 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:48:14,929 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:48:14,929 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-07 07:48:14,969 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,985 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,985 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,985 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,985 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,986 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,986 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,986 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,986 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,987 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,987 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,987 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,988 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,988 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,988 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,988 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,989 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,989 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,989 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,989 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,990 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,990 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,990 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,990 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,990 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,991 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,991 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,991 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,992 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,992 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,992 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,992 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,992 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,993 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,993 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,993 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,993 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,993 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,994 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,994 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,994 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,994 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,995 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,995 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,995 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,995 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,996 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,996 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,996 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,996 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,997 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,997 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,997 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,997 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,997 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:14,998 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:15,001 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:15,001 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:15,001 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:15,002 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:15,002 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:15,002 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:15,007 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:15,007 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:15,007 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:15,007 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:15,008 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:15,008 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:48:15,011 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-07 07:48:15,095 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:48:15,101 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 [2021-11-07 07:48:15,102 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-07 07:48:15,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2021-11-07 07:48:15,176 INFO L129 PetriNetUnfolder]: 5/64 cut-off events. [2021-11-07 07:48:15,176 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-07 07:48:15,185 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2021-11-07 07:48:15,186 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2021-11-07 07:48:15,191 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2021-11-07 07:48:15,209 INFO L129 PetriNetUnfolder]: 3/52 cut-off events. [2021-11-07 07:48:15,209 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-07 07:48:15,209 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:15,210 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] [2021-11-07 07:48:15,210 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:15,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:15,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2112281486, now seen corresponding path program 1 times [2021-11-07 07:48:15,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:15,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815806783] [2021-11-07 07:48:15,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:15,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:15,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:15,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815806783] [2021-11-07 07:48:15,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815806783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:48:15,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:48:15,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 07:48:15,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515890274] [2021-11-07 07:48:15,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:48:15,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:15,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:48:15,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:48:15,866 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:15,874 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:15,874 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:15,874 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:15,876 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:16,142 INFO L129 PetriNetUnfolder]: 39/220 cut-off events. [2021-11-07 07:48:16,142 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-07 07:48:16,147 INFO L84 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 220 events. 39/220 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 984 event pairs, 0 based on Foata normal form. 40/235 useless extension candidates. Maximal degree in co-relation 265. Up to 26 conditions per place. [2021-11-07 07:48:16,150 INFO L132 encePairwiseOnDemand]: 55/66 looper letters, 16 selfloop transitions, 9 changer transitions 5/81 dead transitions. [2021-11-07 07:48:16,150 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 228 flow [2021-11-07 07:48:16,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:48:16,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-07 07:48:16,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 473 transitions. [2021-11-07 07:48:16,182 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8958333333333334 [2021-11-07 07:48:16,183 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 473 transitions. [2021-11-07 07:48:16,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 473 transitions. [2021-11-07 07:48:16,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:16,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 473 transitions. [2021-11-07 07:48:16,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.125) internal successors, (473), 8 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:16,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 66.0) internal successors, (594), 9 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:16,216 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 66.0) internal successors, (594), 9 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:16,218 INFO L186 Difference]: Start difference. First operand has 66 places, 64 transitions, 134 flow. Second operand 8 states and 473 transitions. [2021-11-07 07:48:16,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 228 flow [2021-11-07 07:48:16,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 81 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-07 07:48:16,236 INFO L242 Difference]: Finished difference. Result has 77 places, 67 transitions, 198 flow [2021-11-07 07:48:16,238 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=198, PETRI_PLACES=77, PETRI_TRANSITIONS=67} [2021-11-07 07:48:16,239 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 11 predicate places. [2021-11-07 07:48:16,241 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 67 transitions, 198 flow [2021-11-07 07:48:16,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:16,242 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:16,243 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] [2021-11-07 07:48:16,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:48:16,243 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:16,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:16,246 INFO L85 PathProgramCache]: Analyzing trace with hash 263941995, now seen corresponding path program 1 times [2021-11-07 07:48:16,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:16,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935546450] [2021-11-07 07:48:16,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:16,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:16,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:16,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935546450] [2021-11-07 07:48:16,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935546450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:48:16,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:48:16,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 07:48:16,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874428142] [2021-11-07 07:48:16,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:48:16,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:16,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:48:16,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:48:16,542 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:16,543 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 67 transitions, 198 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:16,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:16,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:16,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:16,730 INFO L129 PetriNetUnfolder]: 55/271 cut-off events. [2021-11-07 07:48:16,730 INFO L130 PetriNetUnfolder]: For 298/325 co-relation queries the response was YES. [2021-11-07 07:48:16,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 271 events. 55/271 cut-off events. For 298/325 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1215 event pairs, 0 based on Foata normal form. 9/259 useless extension candidates. Maximal degree in co-relation 540. Up to 42 conditions per place. [2021-11-07 07:48:16,738 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 19 selfloop transitions, 11 changer transitions 30/104 dead transitions. [2021-11-07 07:48:16,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 104 transitions, 540 flow [2021-11-07 07:48:16,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 07:48:16,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-07 07:48:16,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 568 transitions. [2021-11-07 07:48:16,743 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8606060606060606 [2021-11-07 07:48:16,743 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 568 transitions. [2021-11-07 07:48:16,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 568 transitions. [2021-11-07 07:48:16,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:16,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 568 transitions. [2021-11-07 07:48:16,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.8) internal successors, (568), 10 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:16,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:16,749 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:16,750 INFO L186 Difference]: Start difference. First operand has 77 places, 67 transitions, 198 flow. Second operand 10 states and 568 transitions. [2021-11-07 07:48:16,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 104 transitions, 540 flow [2021-11-07 07:48:16,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 526 flow, removed 4 selfloop flow, removed 2 redundant places. [2021-11-07 07:48:16,763 INFO L242 Difference]: Finished difference. Result has 91 places, 66 transitions, 285 flow [2021-11-07 07:48:16,763 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=285, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2021-11-07 07:48:16,764 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 25 predicate places. [2021-11-07 07:48:16,764 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 285 flow [2021-11-07 07:48:16,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:16,765 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:16,766 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] [2021-11-07 07:48:16,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:48:16,767 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:16,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:16,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2041180881, now seen corresponding path program 2 times [2021-11-07 07:48:16,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:16,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310908122] [2021-11-07 07:48:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:16,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:16,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:16,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310908122] [2021-11-07 07:48:16,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310908122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:48:16,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:48:16,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 07:48:16,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832024099] [2021-11-07 07:48:16,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:48:16,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:16,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:48:16,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:48:16,972 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:16,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 285 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:16,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:16,973 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:16,973 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:17,116 INFO L129 PetriNetUnfolder]: 35/183 cut-off events. [2021-11-07 07:48:17,116 INFO L130 PetriNetUnfolder]: For 839/896 co-relation queries the response was YES. [2021-11-07 07:48:17,118 INFO L84 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 183 events. 35/183 cut-off events. For 839/896 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 610 event pairs, 0 based on Foata normal form. 27/193 useless extension candidates. Maximal degree in co-relation 481. Up to 35 conditions per place. [2021-11-07 07:48:17,120 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 16 selfloop transitions, 12 changer transitions 11/83 dead transitions. [2021-11-07 07:48:17,121 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 83 transitions, 565 flow [2021-11-07 07:48:17,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:48:17,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-07 07:48:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 503 transitions. [2021-11-07 07:48:17,125 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8468013468013468 [2021-11-07 07:48:17,129 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 503 transitions. [2021-11-07 07:48:17,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 503 transitions. [2021-11-07 07:48:17,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:17,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 503 transitions. [2021-11-07 07:48:17,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 55.888888888888886) internal successors, (503), 9 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:17,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:17,137 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:17,137 INFO L186 Difference]: Start difference. First operand has 91 places, 66 transitions, 285 flow. Second operand 9 states and 503 transitions. [2021-11-07 07:48:17,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 83 transitions, 565 flow [2021-11-07 07:48:17,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 83 transitions, 492 flow, removed 33 selfloop flow, removed 5 redundant places. [2021-11-07 07:48:17,155 INFO L242 Difference]: Finished difference. Result has 85 places, 68 transitions, 325 flow [2021-11-07 07:48:17,155 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=325, PETRI_PLACES=85, PETRI_TRANSITIONS=68} [2021-11-07 07:48:17,156 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 19 predicate places. [2021-11-07 07:48:17,156 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 68 transitions, 325 flow [2021-11-07 07:48:17,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:17,157 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:17,157 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] [2021-11-07 07:48:17,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:48:17,157 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:17,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:17,158 INFO L85 PathProgramCache]: Analyzing trace with hash 418425126, now seen corresponding path program 1 times [2021-11-07 07:48:17,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:17,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856885074] [2021-11-07 07:48:17,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:17,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:17,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:17,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856885074] [2021-11-07 07:48:17,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856885074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:48:17,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:48:17,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 07:48:17,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033198195] [2021-11-07 07:48:17,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:48:17,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:17,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:48:17,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:48:17,323 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:17,324 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 68 transitions, 325 flow. Second operand has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:17,324 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:17,324 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:17,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:17,466 INFO L129 PetriNetUnfolder]: 41/221 cut-off events. [2021-11-07 07:48:17,466 INFO L130 PetriNetUnfolder]: For 911/960 co-relation queries the response was YES. [2021-11-07 07:48:17,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 221 events. 41/221 cut-off events. For 911/960 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 777 event pairs, 0 based on Foata normal form. 18/218 useless extension candidates. Maximal degree in co-relation 585. Up to 41 conditions per place. [2021-11-07 07:48:17,470 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 18 selfloop transitions, 20 changer transitions 8/90 dead transitions. [2021-11-07 07:48:17,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 90 transitions, 675 flow [2021-11-07 07:48:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:48:17,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-07 07:48:17,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 620 transitions. [2021-11-07 07:48:17,474 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8539944903581267 [2021-11-07 07:48:17,474 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 620 transitions. [2021-11-07 07:48:17,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 620 transitions. [2021-11-07 07:48:17,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:17,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 620 transitions. [2021-11-07 07:48:17,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 56.36363636363637) internal successors, (620), 11 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:17,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:17,481 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:17,481 INFO L186 Difference]: Start difference. First operand has 85 places, 68 transitions, 325 flow. Second operand 11 states and 620 transitions. [2021-11-07 07:48:17,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 90 transitions, 675 flow [2021-11-07 07:48:17,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 90 transitions, 578 flow, removed 38 selfloop flow, removed 8 redundant places. [2021-11-07 07:48:17,489 INFO L242 Difference]: Finished difference. Result has 91 places, 73 transitions, 410 flow [2021-11-07 07:48:17,490 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=410, PETRI_PLACES=91, PETRI_TRANSITIONS=73} [2021-11-07 07:48:17,490 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 25 predicate places. [2021-11-07 07:48:17,490 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 73 transitions, 410 flow [2021-11-07 07:48:17,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:17,491 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:17,491 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] [2021-11-07 07:48:17,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:48:17,491 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:17,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:17,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1863597102, now seen corresponding path program 2 times [2021-11-07 07:48:17,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:17,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367309333] [2021-11-07 07:48:17,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:17,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:17,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:17,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367309333] [2021-11-07 07:48:17,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367309333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:48:17,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:48:17,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 07:48:17,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92007902] [2021-11-07 07:48:17,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:48:17,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:17,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:48:17,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:48:17,596 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:17,597 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 73 transitions, 410 flow. Second operand has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:17,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:17,597 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:17,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:17,768 INFO L129 PetriNetUnfolder]: 34/203 cut-off events. [2021-11-07 07:48:17,768 INFO L130 PetriNetUnfolder]: For 964/1012 co-relation queries the response was YES. [2021-11-07 07:48:17,770 INFO L84 FinitePrefix]: Finished finitePrefix Result has 597 conditions, 203 events. 34/203 cut-off events. For 964/1012 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 702 event pairs, 0 based on Foata normal form. 26/210 useless extension candidates. Maximal degree in co-relation 552. Up to 38 conditions per place. [2021-11-07 07:48:17,772 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 15 selfloop transitions, 20 changer transitions 11/90 dead transitions. [2021-11-07 07:48:17,772 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 90 transitions, 734 flow [2021-11-07 07:48:17,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:48:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-07 07:48:17,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 614 transitions. [2021-11-07 07:48:17,776 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8457300275482094 [2021-11-07 07:48:17,776 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 614 transitions. [2021-11-07 07:48:17,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 614 transitions. [2021-11-07 07:48:17,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:17,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 614 transitions. [2021-11-07 07:48:17,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 55.81818181818182) internal successors, (614), 11 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:17,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:17,784 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:17,784 INFO L186 Difference]: Start difference. First operand has 91 places, 73 transitions, 410 flow. Second operand 11 states and 614 transitions. [2021-11-07 07:48:17,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 90 transitions, 734 flow [2021-11-07 07:48:17,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 90 transitions, 662 flow, removed 20 selfloop flow, removed 7 redundant places. [2021-11-07 07:48:17,793 INFO L242 Difference]: Finished difference. Result has 96 places, 74 transitions, 451 flow [2021-11-07 07:48:17,793 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=451, PETRI_PLACES=96, PETRI_TRANSITIONS=74} [2021-11-07 07:48:17,794 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 30 predicate places. [2021-11-07 07:48:17,794 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 74 transitions, 451 flow [2021-11-07 07:48:17,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:17,794 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:17,795 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] [2021-11-07 07:48:17,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:48:17,795 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:17,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:17,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1954121900, now seen corresponding path program 3 times [2021-11-07 07:48:17,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:17,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103515383] [2021-11-07 07:48:17,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:17,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:17,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:17,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103515383] [2021-11-07 07:48:17,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103515383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:48:17,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:48:17,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 07:48:17,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683964388] [2021-11-07 07:48:17,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:48:17,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:17,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:48:17,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:48:17,942 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:17,943 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 74 transitions, 451 flow. Second operand has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:17,943 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:17,943 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:17,943 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:18,145 INFO L129 PetriNetUnfolder]: 33/187 cut-off events. [2021-11-07 07:48:18,145 INFO L130 PetriNetUnfolder]: For 969/1007 co-relation queries the response was YES. [2021-11-07 07:48:18,147 INFO L84 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 187 events. 33/187 cut-off events. For 969/1007 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 672 event pairs, 0 based on Foata normal form. 27/198 useless extension candidates. Maximal degree in co-relation 545. Up to 38 conditions per place. [2021-11-07 07:48:18,149 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 22 selfloop transitions, 17 changer transitions 5/88 dead transitions. [2021-11-07 07:48:18,149 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 88 transitions, 742 flow [2021-11-07 07:48:18,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:48:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-07 07:48:18,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 668 transitions. [2021-11-07 07:48:18,153 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2021-11-07 07:48:18,153 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 668 transitions. [2021-11-07 07:48:18,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 668 transitions. [2021-11-07 07:48:18,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:18,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 668 transitions. [2021-11-07 07:48:18,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 55.666666666666664) internal successors, (668), 12 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:18,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 66.0) internal successors, (858), 13 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:18,162 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 66.0) internal successors, (858), 13 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:18,162 INFO L186 Difference]: Start difference. First operand has 96 places, 74 transitions, 451 flow. Second operand 12 states and 668 transitions. [2021-11-07 07:48:18,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 88 transitions, 742 flow [2021-11-07 07:48:18,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 88 transitions, 641 flow, removed 29 selfloop flow, removed 10 redundant places. [2021-11-07 07:48:18,172 INFO L242 Difference]: Finished difference. Result has 99 places, 78 transitions, 490 flow [2021-11-07 07:48:18,172 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=490, PETRI_PLACES=99, PETRI_TRANSITIONS=78} [2021-11-07 07:48:18,173 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 33 predicate places. [2021-11-07 07:48:18,173 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 78 transitions, 490 flow [2021-11-07 07:48:18,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:18,175 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:18,176 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] [2021-11-07 07:48:18,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:48:18,176 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:18,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:18,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1389345520, now seen corresponding path program 1 times [2021-11-07 07:48:18,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:18,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231710002] [2021-11-07 07:48:18,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:18,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:18,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:18,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231710002] [2021-11-07 07:48:18,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231710002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:18,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139300058] [2021-11-07 07:48:18,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:18,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:18,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:18,330 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:18,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:48:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:18,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 07:48:18,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:18,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139300058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:18,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:18,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-07 07:48:18,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201615686] [2021-11-07 07:48:18,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:48:18,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:18,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:48:18,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:48:18,834 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:18,835 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 78 transitions, 490 flow. Second operand has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:18,835 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:18,835 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:18,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:19,031 INFO L129 PetriNetUnfolder]: 44/240 cut-off events. [2021-11-07 07:48:19,031 INFO L130 PetriNetUnfolder]: For 1434/1494 co-relation queries the response was YES. [2021-11-07 07:48:19,034 INFO L84 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 240 events. 44/240 cut-off events. For 1434/1494 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 920 event pairs, 0 based on Foata normal form. 32/251 useless extension candidates. Maximal degree in co-relation 736. Up to 52 conditions per place. [2021-11-07 07:48:19,037 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 17 selfloop transitions, 33 changer transitions 11/105 dead transitions. [2021-11-07 07:48:19,037 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 105 transitions, 1026 flow [2021-11-07 07:48:19,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 07:48:19,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-07 07:48:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 893 transitions. [2021-11-07 07:48:19,041 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8456439393939394 [2021-11-07 07:48:19,041 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 893 transitions. [2021-11-07 07:48:19,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 893 transitions. [2021-11-07 07:48:19,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:19,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 893 transitions. [2021-11-07 07:48:19,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.8125) internal successors, (893), 16 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:19,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:19,050 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:19,050 INFO L186 Difference]: Start difference. First operand has 99 places, 78 transitions, 490 flow. Second operand 16 states and 893 transitions. [2021-11-07 07:48:19,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 105 transitions, 1026 flow [2021-11-07 07:48:19,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 105 transitions, 956 flow, removed 28 selfloop flow, removed 5 redundant places. [2021-11-07 07:48:19,060 INFO L242 Difference]: Finished difference. Result has 115 places, 89 transitions, 744 flow [2021-11-07 07:48:19,061 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=744, PETRI_PLACES=115, PETRI_TRANSITIONS=89} [2021-11-07 07:48:19,061 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 49 predicate places. [2021-11-07 07:48:19,061 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 89 transitions, 744 flow [2021-11-07 07:48:19,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:19,062 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:19,062 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:19,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:19,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:19,277 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:19,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:19,278 INFO L85 PathProgramCache]: Analyzing trace with hash -178007383, now seen corresponding path program 1 times [2021-11-07 07:48:19,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:19,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395717001] [2021-11-07 07:48:19,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:19,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:19,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:19,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395717001] [2021-11-07 07:48:19,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395717001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:19,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982881706] [2021-11-07 07:48:19,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:19,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:19,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:19,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:19,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:48:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:19,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:48:19,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:19,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982881706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:19,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:19,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-07 07:48:19,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656259486] [2021-11-07 07:48:19,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:48:19,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:19,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:48:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:48:19,844 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:19,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 89 transitions, 744 flow. Second operand has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:19,846 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:19,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:19,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:20,122 INFO L129 PetriNetUnfolder]: 52/289 cut-off events. [2021-11-07 07:48:20,122 INFO L130 PetriNetUnfolder]: For 2263/2326 co-relation queries the response was YES. [2021-11-07 07:48:20,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 289 events. 52/289 cut-off events. For 2263/2326 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1213 event pairs, 0 based on Foata normal form. 42/304 useless extension candidates. Maximal degree in co-relation 997. Up to 64 conditions per place. [2021-11-07 07:48:20,129 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 35 selfloop transitions, 30 changer transitions 8/117 dead transitions. [2021-11-07 07:48:20,129 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 117 transitions, 1406 flow [2021-11-07 07:48:20,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 07:48:20,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-07 07:48:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 892 transitions. [2021-11-07 07:48:20,133 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-11-07 07:48:20,133 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 892 transitions. [2021-11-07 07:48:20,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 892 transitions. [2021-11-07 07:48:20,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:20,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 892 transitions. [2021-11-07 07:48:20,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:20,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:20,142 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:20,142 INFO L186 Difference]: Start difference. First operand has 115 places, 89 transitions, 744 flow. Second operand 16 states and 892 transitions. [2021-11-07 07:48:20,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 117 transitions, 1406 flow [2021-11-07 07:48:20,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 117 transitions, 1033 flow, removed 171 selfloop flow, removed 10 redundant places. [2021-11-07 07:48:20,158 INFO L242 Difference]: Finished difference. Result has 123 places, 99 transitions, 767 flow [2021-11-07 07:48:20,159 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=767, PETRI_PLACES=123, PETRI_TRANSITIONS=99} [2021-11-07 07:48:20,159 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 57 predicate places. [2021-11-07 07:48:20,159 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 99 transitions, 767 flow [2021-11-07 07:48:20,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:20,160 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:20,160 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:20,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:20,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:20,385 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:20,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:20,386 INFO L85 PathProgramCache]: Analyzing trace with hash 800770181, now seen corresponding path program 2 times [2021-11-07 07:48:20,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:20,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382250004] [2021-11-07 07:48:20,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:20,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:20,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:20,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382250004] [2021-11-07 07:48:20,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382250004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:20,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648464816] [2021-11-07 07:48:20,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:48:20,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:20,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:20,515 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:20,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:48:20,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:48:20,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:20,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:48:20,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:20,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648464816] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:20,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:20,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-11-07 07:48:20,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493560410] [2021-11-07 07:48:20,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:48:20,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:20,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:48:20,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:48:20,960 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:20,961 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 99 transitions, 767 flow. Second operand has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:20,961 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:20,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:20,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:21,349 INFO L129 PetriNetUnfolder]: 66/361 cut-off events. [2021-11-07 07:48:21,349 INFO L130 PetriNetUnfolder]: For 2941/3011 co-relation queries the response was YES. [2021-11-07 07:48:21,353 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1298 conditions, 361 events. 66/361 cut-off events. For 2941/3011 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1607 event pairs, 0 based on Foata normal form. 39/367 useless extension candidates. Maximal degree in co-relation 1236. Up to 72 conditions per place. [2021-11-07 07:48:21,357 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 23 selfloop transitions, 53 changer transitions 14/134 dead transitions. [2021-11-07 07:48:21,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 134 transitions, 1651 flow [2021-11-07 07:48:21,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 07:48:21,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-07 07:48:21,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1172 transitions. [2021-11-07 07:48:21,366 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8455988455988456 [2021-11-07 07:48:21,366 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1172 transitions. [2021-11-07 07:48:21,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1172 transitions. [2021-11-07 07:48:21,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:21,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1172 transitions. [2021-11-07 07:48:21,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.80952380952381) internal successors, (1172), 21 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:21,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:21,380 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:21,381 INFO L186 Difference]: Start difference. First operand has 123 places, 99 transitions, 767 flow. Second operand 21 states and 1172 transitions. [2021-11-07 07:48:21,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 134 transitions, 1651 flow [2021-11-07 07:48:21,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 134 transitions, 1520 flow, removed 51 selfloop flow, removed 11 redundant places. [2021-11-07 07:48:21,399 INFO L242 Difference]: Finished difference. Result has 140 places, 113 transitions, 1120 flow [2021-11-07 07:48:21,400 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1120, PETRI_PLACES=140, PETRI_TRANSITIONS=113} [2021-11-07 07:48:21,400 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 74 predicate places. [2021-11-07 07:48:21,400 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 113 transitions, 1120 flow [2021-11-07 07:48:21,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:21,401 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:21,401 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:21,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:21,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-07 07:48:21,622 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:21,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:21,622 INFO L85 PathProgramCache]: Analyzing trace with hash -2120315628, now seen corresponding path program 3 times [2021-11-07 07:48:21,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:21,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408305000] [2021-11-07 07:48:21,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:21,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:21,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:21,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408305000] [2021-11-07 07:48:21,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408305000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:21,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207207819] [2021-11-07 07:48:21,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:48:21,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:21,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:21,765 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:21,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:48:21,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 07:48:21,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:21,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:48:21,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:22,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207207819] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:22,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:22,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-11-07 07:48:22,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604788626] [2021-11-07 07:48:22,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:48:22,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:22,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:48:22,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:48:22,215 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:22,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 113 transitions, 1120 flow. Second operand has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:22,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:22,217 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:22,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:22,686 INFO L129 PetriNetUnfolder]: 80/448 cut-off events. [2021-11-07 07:48:22,686 INFO L130 PetriNetUnfolder]: For 5936/6007 co-relation queries the response was YES. [2021-11-07 07:48:22,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1862 conditions, 448 events. 80/448 cut-off events. For 5936/6007 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2088 event pairs, 0 based on Foata normal form. 44/449 useless extension candidates. Maximal degree in co-relation 1792. Up to 92 conditions per place. [2021-11-07 07:48:22,696 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 41 selfloop transitions, 61 changer transitions 14/160 dead transitions. [2021-11-07 07:48:22,696 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 160 transitions, 2444 flow [2021-11-07 07:48:22,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:48:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-07 07:48:22,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1394 transitions. [2021-11-07 07:48:22,700 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8448484848484848 [2021-11-07 07:48:22,700 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1394 transitions. [2021-11-07 07:48:22,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1394 transitions. [2021-11-07 07:48:22,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:22,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1394 transitions. [2021-11-07 07:48:22,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.76) internal successors, (1394), 25 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:22,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:22,710 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:22,711 INFO L186 Difference]: Start difference. First operand has 140 places, 113 transitions, 1120 flow. Second operand 25 states and 1394 transitions. [2021-11-07 07:48:22,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 160 transitions, 2444 flow [2021-11-07 07:48:22,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 160 transitions, 1929 flow, removed 233 selfloop flow, removed 13 redundant places. [2021-11-07 07:48:22,737 INFO L242 Difference]: Finished difference. Result has 157 places, 133 transitions, 1366 flow [2021-11-07 07:48:22,738 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1366, PETRI_PLACES=157, PETRI_TRANSITIONS=133} [2021-11-07 07:48:22,738 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 91 predicate places. [2021-11-07 07:48:22,738 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 133 transitions, 1366 flow [2021-11-07 07:48:22,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:22,739 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:22,739 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:22,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:22,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 07:48:22,965 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:22,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:22,965 INFO L85 PathProgramCache]: Analyzing trace with hash 2145249968, now seen corresponding path program 4 times [2021-11-07 07:48:22,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:22,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274077386] [2021-11-07 07:48:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:22,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:23,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:23,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274077386] [2021-11-07 07:48:23,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274077386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:23,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365073399] [2021-11-07 07:48:23,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:48:23,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:23,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:23,104 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:23,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:48:23,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:48:23,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:23,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 07:48:23,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:23,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365073399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:23,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:23,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-11-07 07:48:23,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314123195] [2021-11-07 07:48:23,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 07:48:23,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:23,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 07:48:23,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:48:23,560 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:23,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 133 transitions, 1366 flow. Second operand has 14 states, 14 states have (on average 54.142857142857146) internal successors, (758), 14 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:23,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:23,562 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:23,562 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:24,053 INFO L129 PetriNetUnfolder]: 90/507 cut-off events. [2021-11-07 07:48:24,054 INFO L130 PetriNetUnfolder]: For 8631/8695 co-relation queries the response was YES. [2021-11-07 07:48:24,058 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2163 conditions, 507 events. 90/507 cut-off events. For 8631/8695 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2431 event pairs, 0 based on Foata normal form. 30/489 useless extension candidates. Maximal degree in co-relation 2087. Up to 90 conditions per place. [2021-11-07 07:48:24,065 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 33 selfloop transitions, 79 changer transitions 14/170 dead transitions. [2021-11-07 07:48:24,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 170 transitions, 2718 flow [2021-11-07 07:48:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:48:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-07 07:48:24,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1394 transitions. [2021-11-07 07:48:24,069 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8448484848484848 [2021-11-07 07:48:24,070 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1394 transitions. [2021-11-07 07:48:24,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1394 transitions. [2021-11-07 07:48:24,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:24,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1394 transitions. [2021-11-07 07:48:24,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.76) internal successors, (1394), 25 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:24,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:24,080 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:24,080 INFO L186 Difference]: Start difference. First operand has 157 places, 133 transitions, 1366 flow. Second operand 25 states and 1394 transitions. [2021-11-07 07:48:24,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 170 transitions, 2718 flow [2021-11-07 07:48:24,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 170 transitions, 2196 flow, removed 230 selfloop flow, removed 18 redundant places. [2021-11-07 07:48:24,117 INFO L242 Difference]: Finished difference. Result has 169 places, 147 transitions, 1594 flow [2021-11-07 07:48:24,118 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1594, PETRI_PLACES=169, PETRI_TRANSITIONS=147} [2021-11-07 07:48:24,118 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 103 predicate places. [2021-11-07 07:48:24,118 INFO L470 AbstractCegarLoop]: Abstraction has has 169 places, 147 transitions, 1594 flow [2021-11-07 07:48:24,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.142857142857146) internal successors, (758), 14 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:24,119 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:24,119 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:24,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-07 07:48:24,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:24,345 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:24,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:24,346 INFO L85 PathProgramCache]: Analyzing trace with hash -470542211, now seen corresponding path program 5 times [2021-11-07 07:48:24,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:24,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396079467] [2021-11-07 07:48:24,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:24,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:24,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:24,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396079467] [2021-11-07 07:48:24,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396079467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:24,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560317267] [2021-11-07 07:48:24,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:48:24,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:24,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:24,523 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:24,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:48:24,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-07 07:48:24,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:24,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 07:48:24,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:25,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560317267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:25,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:25,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-11-07 07:48:25,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726565166] [2021-11-07 07:48:25,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:48:25,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:25,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:48:25,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:48:25,054 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:25,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 147 transitions, 1594 flow. Second operand has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:25,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:25,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:25,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:25,706 INFO L129 PetriNetUnfolder]: 100/566 cut-off events. [2021-11-07 07:48:25,706 INFO L130 PetriNetUnfolder]: For 9526/9592 co-relation queries the response was YES. [2021-11-07 07:48:25,713 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2425 conditions, 566 events. 100/566 cut-off events. For 9526/9592 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2774 event pairs, 0 based on Foata normal form. 35/546 useless extension candidates. Maximal degree in co-relation 2344. Up to 98 conditions per place. [2021-11-07 07:48:25,720 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 51 selfloop transitions, 81 changer transitions 14/190 dead transitions. [2021-11-07 07:48:25,720 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 190 transitions, 3066 flow [2021-11-07 07:48:25,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 07:48:25,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-07 07:48:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1616 transitions. [2021-11-07 07:48:25,724 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8443051201671892 [2021-11-07 07:48:25,725 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1616 transitions. [2021-11-07 07:48:25,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1616 transitions. [2021-11-07 07:48:25,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:25,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1616 transitions. [2021-11-07 07:48:25,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.724137931034484) internal successors, (1616), 29 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:25,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:25,736 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:25,736 INFO L186 Difference]: Start difference. First operand has 169 places, 147 transitions, 1594 flow. Second operand 29 states and 1616 transitions. [2021-11-07 07:48:25,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 190 transitions, 3066 flow [2021-11-07 07:48:25,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 190 transitions, 2601 flow, removed 187 selfloop flow, removed 17 redundant places. [2021-11-07 07:48:25,782 INFO L242 Difference]: Finished difference. Result has 186 places, 163 transitions, 1818 flow [2021-11-07 07:48:25,782 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1818, PETRI_PLACES=186, PETRI_TRANSITIONS=163} [2021-11-07 07:48:25,783 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 120 predicate places. [2021-11-07 07:48:25,783 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 163 transitions, 1818 flow [2021-11-07 07:48:25,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:25,784 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:25,784 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:25,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:25,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 07:48:25,997 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:25,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:25,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2073106453, now seen corresponding path program 6 times [2021-11-07 07:48:25,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:25,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362837278] [2021-11-07 07:48:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:25,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:26,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:26,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362837278] [2021-11-07 07:48:26,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362837278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:26,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182902395] [2021-11-07 07:48:26,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:48:26,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:26,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:26,151 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:26,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:48:26,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-07 07:48:26,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:26,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 07:48:26,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:26,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182902395] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:26,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:26,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-07 07:48:26,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653681956] [2021-11-07 07:48:26,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:48:26,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:26,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:48:26,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:48:26,671 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:26,673 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 163 transitions, 1818 flow. Second operand has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:26,673 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:26,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:26,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:27,221 INFO L129 PetriNetUnfolder]: 102/591 cut-off events. [2021-11-07 07:48:27,221 INFO L130 PetriNetUnfolder]: For 12256/12330 co-relation queries the response was YES. [2021-11-07 07:48:27,228 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2572 conditions, 591 events. 102/591 cut-off events. For 12256/12330 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2971 event pairs, 0 based on Foata normal form. 28/561 useless extension candidates. Maximal degree in co-relation 2485. Up to 96 conditions per place. [2021-11-07 07:48:27,236 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 50 selfloop transitions, 87 changer transitions 8/189 dead transitions. [2021-11-07 07:48:27,236 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 189 transitions, 3050 flow [2021-11-07 07:48:27,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 07:48:27,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-07 07:48:27,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1336 transitions. [2021-11-07 07:48:27,239 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2021-11-07 07:48:27,240 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1336 transitions. [2021-11-07 07:48:27,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1336 transitions. [2021-11-07 07:48:27,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:27,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1336 transitions. [2021-11-07 07:48:27,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.666666666666664) internal successors, (1336), 24 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:27,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:27,249 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:27,249 INFO L186 Difference]: Start difference. First operand has 186 places, 163 transitions, 1818 flow. Second operand 24 states and 1336 transitions. [2021-11-07 07:48:27,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 189 transitions, 3050 flow [2021-11-07 07:48:27,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 189 transitions, 2552 flow, removed 189 selfloop flow, removed 25 redundant places. [2021-11-07 07:48:27,317 INFO L242 Difference]: Finished difference. Result has 186 places, 169 transitions, 1818 flow [2021-11-07 07:48:27,318 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1818, PETRI_PLACES=186, PETRI_TRANSITIONS=169} [2021-11-07 07:48:27,318 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 120 predicate places. [2021-11-07 07:48:27,318 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 169 transitions, 1818 flow [2021-11-07 07:48:27,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:27,319 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:27,319 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:27,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:27,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 07:48:27,545 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:27,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:27,546 INFO L85 PathProgramCache]: Analyzing trace with hash -142496668, now seen corresponding path program 7 times [2021-11-07 07:48:27,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:27,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199252639] [2021-11-07 07:48:27,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:27,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:27,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:27,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199252639] [2021-11-07 07:48:27,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199252639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:27,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91018044] [2021-11-07 07:48:27,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:48:27,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:27,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:27,734 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:27,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:48:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:27,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:48:27,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:28,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91018044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:28,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:28,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-11-07 07:48:28,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803484363] [2021-11-07 07:48:28,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:48:28,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:28,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:48:28,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:48:28,405 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:28,406 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 169 transitions, 1818 flow. Second operand has 15 states, 15 states have (on average 54.06666666666667) internal successors, (811), 15 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:28,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:28,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:28,407 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:28,816 INFO L129 PetriNetUnfolder]: 130/850 cut-off events. [2021-11-07 07:48:28,817 INFO L130 PetriNetUnfolder]: For 15044/15126 co-relation queries the response was YES. [2021-11-07 07:48:28,826 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3380 conditions, 850 events. 130/850 cut-off events. For 15044/15126 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5206 event pairs, 0 based on Foata normal form. 28/783 useless extension candidates. Maximal degree in co-relation 3295. Up to 141 conditions per place. [2021-11-07 07:48:28,837 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 124 selfloop transitions, 49 changer transitions 8/225 dead transitions. [2021-11-07 07:48:28,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 225 transitions, 3428 flow [2021-11-07 07:48:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 07:48:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-07 07:48:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1056 transitions. [2021-11-07 07:48:28,840 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8421052631578947 [2021-11-07 07:48:28,840 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1056 transitions. [2021-11-07 07:48:28,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1056 transitions. [2021-11-07 07:48:28,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:28,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1056 transitions. [2021-11-07 07:48:28,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.578947368421055) internal successors, (1056), 19 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:28,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:28,848 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:28,848 INFO L186 Difference]: Start difference. First operand has 186 places, 169 transitions, 1818 flow. Second operand 19 states and 1056 transitions. [2021-11-07 07:48:28,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 225 transitions, 3428 flow [2021-11-07 07:48:28,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 225 transitions, 3079 flow, removed 93 selfloop flow, removed 19 redundant places. [2021-11-07 07:48:28,907 INFO L242 Difference]: Finished difference. Result has 193 places, 197 transitions, 2227 flow [2021-11-07 07:48:28,908 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2227, PETRI_PLACES=193, PETRI_TRANSITIONS=197} [2021-11-07 07:48:28,908 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 127 predicate places. [2021-11-07 07:48:28,908 INFO L470 AbstractCegarLoop]: Abstraction has has 193 places, 197 transitions, 2227 flow [2021-11-07 07:48:28,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.06666666666667) internal successors, (811), 15 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:28,909 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:28,909 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:28,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:29,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 07:48:29,135 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:29,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:29,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1027482686, now seen corresponding path program 8 times [2021-11-07 07:48:29,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:29,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527303279] [2021-11-07 07:48:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:29,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:29,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:29,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527303279] [2021-11-07 07:48:29,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527303279] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:29,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372895011] [2021-11-07 07:48:29,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:48:29,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:29,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:29,353 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:29,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:48:29,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:48:29,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:29,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:48:29,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:30,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372895011] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:30,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:30,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-07 07:48:30,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114657247] [2021-11-07 07:48:30,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:48:30,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:30,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:48:30,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:48:30,047 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:30,048 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 197 transitions, 2227 flow. Second operand has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:30,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:30,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:30,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:30,578 INFO L129 PetriNetUnfolder]: 160/1120 cut-off events. [2021-11-07 07:48:30,578 INFO L130 PetriNetUnfolder]: For 20838/20925 co-relation queries the response was YES. [2021-11-07 07:48:30,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4389 conditions, 1120 events. 160/1120 cut-off events. For 20838/20925 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7843 event pairs, 0 based on Foata normal form. 33/1030 useless extension candidates. Maximal degree in co-relation 4296. Up to 164 conditions per place. [2021-11-07 07:48:30,602 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 117 selfloop transitions, 88 changer transitions 8/257 dead transitions. [2021-11-07 07:48:30,602 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 257 transitions, 4044 flow [2021-11-07 07:48:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 07:48:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-07 07:48:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1276 transitions. [2021-11-07 07:48:30,613 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8405797101449275 [2021-11-07 07:48:30,613 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1276 transitions. [2021-11-07 07:48:30,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1276 transitions. [2021-11-07 07:48:30,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:30,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1276 transitions. [2021-11-07 07:48:30,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.47826086956522) internal successors, (1276), 23 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:30,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:30,638 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:30,644 INFO L186 Difference]: Start difference. First operand has 193 places, 197 transitions, 2227 flow. Second operand 23 states and 1276 transitions. [2021-11-07 07:48:30,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 257 transitions, 4044 flow [2021-11-07 07:48:30,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 257 transitions, 3834 flow, removed 84 selfloop flow, removed 10 redundant places. [2021-11-07 07:48:30,713 INFO L242 Difference]: Finished difference. Result has 214 places, 228 transitions, 3027 flow [2021-11-07 07:48:30,714 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3027, PETRI_PLACES=214, PETRI_TRANSITIONS=228} [2021-11-07 07:48:30,714 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 148 predicate places. [2021-11-07 07:48:30,715 INFO L470 AbstractCegarLoop]: Abstraction has has 214 places, 228 transitions, 3027 flow [2021-11-07 07:48:30,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:30,716 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:30,716 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:30,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:30,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 07:48:30,934 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:30,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:30,934 INFO L85 PathProgramCache]: Analyzing trace with hash -45491924, now seen corresponding path program 9 times [2021-11-07 07:48:30,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:30,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815885315] [2021-11-07 07:48:30,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:30,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:30,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:31,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:31,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815885315] [2021-11-07 07:48:31,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815885315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:31,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650050202] [2021-11-07 07:48:31,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:48:31,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:31,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:31,124 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:31,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 07:48:31,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 07:48:31,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:31,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:48:31,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:31,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650050202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:31,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:31,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-11-07 07:48:31,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735609159] [2021-11-07 07:48:31,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:48:31,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:31,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:48:31,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:48:31,868 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:31,869 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 228 transitions, 3027 flow. Second operand has 15 states, 15 states have (on average 54.06666666666667) internal successors, (811), 15 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:31,869 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:31,869 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:31,870 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:32,509 INFO L129 PetriNetUnfolder]: 188/1323 cut-off events. [2021-11-07 07:48:32,510 INFO L130 PetriNetUnfolder]: For 26108/26234 co-relation queries the response was YES. [2021-11-07 07:48:32,529 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5407 conditions, 1323 events. 188/1323 cut-off events. For 26108/26234 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 10082 event pairs, 0 based on Foata normal form. 46/1225 useless extension candidates. Maximal degree in co-relation 5305. Up to 200 conditions per place. [2021-11-07 07:48:32,584 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 105 selfloop transitions, 128 changer transitions 8/285 dead transitions. [2021-11-07 07:48:32,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 285 transitions, 4887 flow [2021-11-07 07:48:32,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 07:48:32,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-07 07:48:32,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1221 transitions. [2021-11-07 07:48:32,604 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-11-07 07:48:32,605 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1221 transitions. [2021-11-07 07:48:32,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1221 transitions. [2021-11-07 07:48:32,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:32,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1221 transitions. [2021-11-07 07:48:32,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 55.5) internal successors, (1221), 22 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:32,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:32,618 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:32,619 INFO L186 Difference]: Start difference. First operand has 214 places, 228 transitions, 3027 flow. Second operand 22 states and 1221 transitions. [2021-11-07 07:48:32,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 285 transitions, 4887 flow [2021-11-07 07:48:32,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 285 transitions, 4556 flow, removed 134 selfloop flow, removed 13 redundant places. [2021-11-07 07:48:32,743 INFO L242 Difference]: Finished difference. Result has 230 places, 259 transitions, 3784 flow [2021-11-07 07:48:32,744 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2798, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3784, PETRI_PLACES=230, PETRI_TRANSITIONS=259} [2021-11-07 07:48:32,744 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 164 predicate places. [2021-11-07 07:48:32,745 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 259 transitions, 3784 flow [2021-11-07 07:48:32,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.06666666666667) internal successors, (811), 15 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:32,746 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:32,746 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:32,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:32,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 07:48:32,970 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:32,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:32,970 INFO L85 PathProgramCache]: Analyzing trace with hash -89616114, now seen corresponding path program 10 times [2021-11-07 07:48:32,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:32,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106765512] [2021-11-07 07:48:32,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:32,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:33,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:33,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106765512] [2021-11-07 07:48:33,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106765512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:33,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917157513] [2021-11-07 07:48:33,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:48:33,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:33,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:33,210 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:33,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 07:48:33,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:48:33,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:33,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:48:33,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:33,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917157513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:33,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:33,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-11-07 07:48:33,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348942753] [2021-11-07 07:48:33,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:48:33,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:33,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:48:33,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:48:33,818 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:33,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 259 transitions, 3784 flow. Second operand has 15 states, 15 states have (on average 54.06666666666667) internal successors, (811), 15 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:33,819 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:33,819 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:33,819 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:34,547 INFO L129 PetriNetUnfolder]: 205/1423 cut-off events. [2021-11-07 07:48:34,548 INFO L130 PetriNetUnfolder]: For 31559/31687 co-relation queries the response was YES. [2021-11-07 07:48:34,628 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6170 conditions, 1423 events. 205/1423 cut-off events. For 31559/31687 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 10885 event pairs, 0 based on Foata normal form. 56/1331 useless extension candidates. Maximal degree in co-relation 6061. Up to 218 conditions per place. [2021-11-07 07:48:34,644 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 58 selfloop transitions, 185 changer transitions 8/295 dead transitions. [2021-11-07 07:48:34,644 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 295 transitions, 5614 flow [2021-11-07 07:48:34,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 07:48:34,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-07 07:48:34,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1561 transitions. [2021-11-07 07:48:34,651 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-11-07 07:48:34,651 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1561 transitions. [2021-11-07 07:48:34,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1561 transitions. [2021-11-07 07:48:34,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:34,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1561 transitions. [2021-11-07 07:48:34,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.75) internal successors, (1561), 28 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:34,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:34,661 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:34,661 INFO L186 Difference]: Start difference. First operand has 230 places, 259 transitions, 3784 flow. Second operand 28 states and 1561 transitions. [2021-11-07 07:48:34,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 295 transitions, 5614 flow [2021-11-07 07:48:34,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 295 transitions, 5224 flow, removed 159 selfloop flow, removed 12 redundant places. [2021-11-07 07:48:34,775 INFO L242 Difference]: Finished difference. Result has 249 places, 268 transitions, 4244 flow [2021-11-07 07:48:34,776 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3574, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4244, PETRI_PLACES=249, PETRI_TRANSITIONS=268} [2021-11-07 07:48:34,777 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 183 predicate places. [2021-11-07 07:48:34,777 INFO L470 AbstractCegarLoop]: Abstraction has has 249 places, 268 transitions, 4244 flow [2021-11-07 07:48:34,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.06666666666667) internal successors, (811), 15 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:34,778 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:34,778 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:34,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:34,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 07:48:34,993 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:34,994 INFO L85 PathProgramCache]: Analyzing trace with hash 96961072, now seen corresponding path program 11 times [2021-11-07 07:48:34,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:34,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787455552] [2021-11-07 07:48:34,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:34,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:35,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:35,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787455552] [2021-11-07 07:48:35,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787455552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:35,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055570084] [2021-11-07 07:48:35,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:48:35,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:35,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:35,162 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:35,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 07:48:35,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-07 07:48:35,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:35,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:48:35,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:35,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055570084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:35,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:35,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-07 07:48:35,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972159716] [2021-11-07 07:48:35,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:48:35,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:35,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:48:35,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:48:35,842 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:35,843 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 268 transitions, 4244 flow. Second operand has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:35,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:35,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:35,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:36,769 INFO L129 PetriNetUnfolder]: 200/1408 cut-off events. [2021-11-07 07:48:36,769 INFO L130 PetriNetUnfolder]: For 32704/32879 co-relation queries the response was YES. [2021-11-07 07:48:36,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6244 conditions, 1408 events. 200/1408 cut-off events. For 32704/32879 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 10875 event pairs, 0 based on Foata normal form. 68/1329 useless extension candidates. Maximal degree in co-relation 6131. Up to 214 conditions per place. [2021-11-07 07:48:36,845 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 54 selfloop transitions, 189 changer transitions 11/298 dead transitions. [2021-11-07 07:48:36,845 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 298 transitions, 6006 flow [2021-11-07 07:48:36,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 07:48:36,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-07 07:48:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1669 transitions. [2021-11-07 07:48:36,849 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.842929292929293 [2021-11-07 07:48:36,849 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1669 transitions. [2021-11-07 07:48:36,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1669 transitions. [2021-11-07 07:48:36,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:36,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1669 transitions. [2021-11-07 07:48:36,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.63333333333333) internal successors, (1669), 30 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:36,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:36,858 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:36,858 INFO L186 Difference]: Start difference. First operand has 249 places, 268 transitions, 4244 flow. Second operand 30 states and 1669 transitions. [2021-11-07 07:48:36,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 298 transitions, 6006 flow [2021-11-07 07:48:36,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 298 transitions, 5416 flow, removed 136 selfloop flow, removed 23 redundant places. [2021-11-07 07:48:36,997 INFO L242 Difference]: Finished difference. Result has 258 places, 271 transitions, 4307 flow [2021-11-07 07:48:36,998 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3786, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4307, PETRI_PLACES=258, PETRI_TRANSITIONS=271} [2021-11-07 07:48:36,998 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 192 predicate places. [2021-11-07 07:48:36,998 INFO L470 AbstractCegarLoop]: Abstraction has has 258 places, 271 transitions, 4307 flow [2021-11-07 07:48:36,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:36,999 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:36,999 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:37,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:37,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 07:48:37,225 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:37,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:37,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1109597357, now seen corresponding path program 12 times [2021-11-07 07:48:37,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:37,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978097618] [2021-11-07 07:48:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:37,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:37,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:37,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978097618] [2021-11-07 07:48:37,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978097618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:37,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135373196] [2021-11-07 07:48:37,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:48:37,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:37,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:37,462 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:37,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 07:48:37,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 07:48:37,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:37,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:48:37,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:38,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135373196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:38,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:38,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-07 07:48:38,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246113361] [2021-11-07 07:48:38,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:48:38,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:38,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:48:38,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:48:38,494 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:38,496 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 271 transitions, 4307 flow. Second operand has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:38,496 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:38,496 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:38,496 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:39,121 INFO L129 PetriNetUnfolder]: 202/1412 cut-off events. [2021-11-07 07:48:39,121 INFO L130 PetriNetUnfolder]: For 31444/31611 co-relation queries the response was YES. [2021-11-07 07:48:39,142 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6269 conditions, 1412 events. 202/1412 cut-off events. For 31444/31611 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 10852 event pairs, 0 based on Foata normal form. 38/1296 useless extension candidates. Maximal degree in co-relation 6153. Up to 318 conditions per place. [2021-11-07 07:48:39,156 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 219 selfloop transitions, 29 changer transitions 8/300 dead transitions. [2021-11-07 07:48:39,156 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 300 transitions, 5737 flow [2021-11-07 07:48:39,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 07:48:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-07 07:48:39,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1055 transitions. [2021-11-07 07:48:39,160 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8413078149920256 [2021-11-07 07:48:39,160 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1055 transitions. [2021-11-07 07:48:39,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1055 transitions. [2021-11-07 07:48:39,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:39,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1055 transitions. [2021-11-07 07:48:39,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.526315789473685) internal successors, (1055), 19 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:39,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:39,167 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:39,167 INFO L186 Difference]: Start difference. First operand has 258 places, 271 transitions, 4307 flow. Second operand 19 states and 1055 transitions. [2021-11-07 07:48:39,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 300 transitions, 5737 flow [2021-11-07 07:48:39,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 300 transitions, 5280 flow, removed 51 selfloop flow, removed 27 redundant places. [2021-11-07 07:48:39,296 INFO L242 Difference]: Finished difference. Result has 253 places, 275 transitions, 4080 flow [2021-11-07 07:48:39,297 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3864, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4080, PETRI_PLACES=253, PETRI_TRANSITIONS=275} [2021-11-07 07:48:39,297 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 187 predicate places. [2021-11-07 07:48:39,297 INFO L470 AbstractCegarLoop]: Abstraction has has 253 places, 275 transitions, 4080 flow [2021-11-07 07:48:39,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:39,298 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:39,298 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:39,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:39,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:39,500 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:39,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:39,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1871687997, now seen corresponding path program 13 times [2021-11-07 07:48:39,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:39,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458960371] [2021-11-07 07:48:39,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:39,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:39,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:39,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458960371] [2021-11-07 07:48:39,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458960371] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:39,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97067230] [2021-11-07 07:48:39,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:48:39,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:39,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:39,819 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:39,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 07:48:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:40,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:48:40,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:40,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97067230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:40,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:40,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-11-07 07:48:40,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937908822] [2021-11-07 07:48:40,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:48:40,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:40,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:48:40,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:48:40,765 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:40,767 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 275 transitions, 4080 flow. Second operand has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:40,767 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:40,767 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:40,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:41,462 INFO L129 PetriNetUnfolder]: 206/1441 cut-off events. [2021-11-07 07:48:41,462 INFO L130 PetriNetUnfolder]: For 36891/37073 co-relation queries the response was YES. [2021-11-07 07:48:41,481 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6470 conditions, 1441 events. 206/1441 cut-off events. For 36891/37073 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 11078 event pairs, 0 based on Foata normal form. 42/1326 useless extension candidates. Maximal degree in co-relation 6351. Up to 282 conditions per place. [2021-11-07 07:48:41,496 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 201 selfloop transitions, 53 changer transitions 8/306 dead transitions. [2021-11-07 07:48:41,497 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 306 transitions, 5635 flow [2021-11-07 07:48:41,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 07:48:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-07 07:48:41,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1222 transitions. [2021-11-07 07:48:41,500 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8415977961432507 [2021-11-07 07:48:41,500 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1222 transitions. [2021-11-07 07:48:41,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1222 transitions. [2021-11-07 07:48:41,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:41,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1222 transitions. [2021-11-07 07:48:41,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 55.54545454545455) internal successors, (1222), 22 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,507 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,508 INFO L186 Difference]: Start difference. First operand has 253 places, 275 transitions, 4080 flow. Second operand 22 states and 1222 transitions. [2021-11-07 07:48:41,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 306 transitions, 5635 flow [2021-11-07 07:48:41,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 306 transitions, 5425 flow, removed 94 selfloop flow, removed 8 redundant places. [2021-11-07 07:48:41,628 INFO L242 Difference]: Finished difference. Result has 271 places, 280 transitions, 4245 flow [2021-11-07 07:48:41,629 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3962, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4245, PETRI_PLACES=271, PETRI_TRANSITIONS=280} [2021-11-07 07:48:41,629 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 205 predicate places. [2021-11-07 07:48:41,629 INFO L470 AbstractCegarLoop]: Abstraction has has 271 places, 280 transitions, 4245 flow [2021-11-07 07:48:41,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,630 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:41,630 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:41,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-07 07:48:41,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:41,849 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:41,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2091658269, now seen corresponding path program 14 times [2021-11-07 07:48:41,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:41,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5640711] [2021-11-07 07:48:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:41,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:42,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:42,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5640711] [2021-11-07 07:48:42,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5640711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:42,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769178556] [2021-11-07 07:48:42,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:48:42,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:42,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:42,041 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:42,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 07:48:42,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:48:42,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:42,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:48:42,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:43,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769178556] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:43,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:43,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-07 07:48:43,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653604711] [2021-11-07 07:48:43,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:48:43,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:43,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:48:43,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:48:43,004 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:43,006 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 280 transitions, 4245 flow. Second operand has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:43,006 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:43,006 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:43,006 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:43,721 INFO L129 PetriNetUnfolder]: 210/1484 cut-off events. [2021-11-07 07:48:43,722 INFO L130 PetriNetUnfolder]: For 37790/37949 co-relation queries the response was YES. [2021-11-07 07:48:43,744 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6660 conditions, 1484 events. 210/1484 cut-off events. For 37790/37949 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 11496 event pairs, 0 based on Foata normal form. 50/1372 useless extension candidates. Maximal degree in co-relation 6536. Up to 247 conditions per place. [2021-11-07 07:48:43,757 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 181 selfloop transitions, 78 changer transitions 8/311 dead transitions. [2021-11-07 07:48:43,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 311 transitions, 5787 flow [2021-11-07 07:48:43,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 07:48:43,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-07 07:48:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1278 transitions. [2021-11-07 07:48:43,760 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841897233201581 [2021-11-07 07:48:43,760 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1278 transitions. [2021-11-07 07:48:43,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1278 transitions. [2021-11-07 07:48:43,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:43,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1278 transitions. [2021-11-07 07:48:43,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.56521739130435) internal successors, (1278), 23 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:43,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:43,767 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:43,767 INFO L186 Difference]: Start difference. First operand has 271 places, 280 transitions, 4245 flow. Second operand 23 states and 1278 transitions. [2021-11-07 07:48:43,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 311 transitions, 5787 flow [2021-11-07 07:48:43,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 311 transitions, 5598 flow, removed 79 selfloop flow, removed 10 redundant places. [2021-11-07 07:48:43,949 INFO L242 Difference]: Finished difference. Result has 288 places, 285 transitions, 4477 flow [2021-11-07 07:48:43,949 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4132, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4477, PETRI_PLACES=288, PETRI_TRANSITIONS=285} [2021-11-07 07:48:43,949 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 222 predicate places. [2021-11-07 07:48:43,950 INFO L470 AbstractCegarLoop]: Abstraction has has 288 places, 285 transitions, 4477 flow [2021-11-07 07:48:43,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:43,950 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:43,951 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:43,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:44,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-07 07:48:44,166 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:44,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:44,167 INFO L85 PathProgramCache]: Analyzing trace with hash 612825563, now seen corresponding path program 15 times [2021-11-07 07:48:44,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:44,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907761176] [2021-11-07 07:48:44,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:44,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:44,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:44,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907761176] [2021-11-07 07:48:44,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907761176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:44,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605460538] [2021-11-07 07:48:44,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:48:44,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:44,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:44,405 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:44,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 07:48:44,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-07 07:48:44,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:44,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:48:44,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:45,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605460538] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:45,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:45,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-11-07 07:48:45,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875609819] [2021-11-07 07:48:45,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:48:45,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:45,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:48:45,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:48:45,370 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:45,372 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 285 transitions, 4477 flow. Second operand has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:45,372 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:45,372 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:45,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:46,404 INFO L129 PetriNetUnfolder]: 221/1576 cut-off events. [2021-11-07 07:48:46,405 INFO L130 PetriNetUnfolder]: For 40407/40586 co-relation queries the response was YES. [2021-11-07 07:48:46,429 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7134 conditions, 1576 events. 221/1576 cut-off events. For 40407/40586 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 12455 event pairs, 0 based on Foata normal form. 58/1464 useless extension candidates. Maximal degree in co-relation 7005. Up to 248 conditions per place. [2021-11-07 07:48:46,444 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 134 selfloop transitions, 142 changer transitions 8/328 dead transitions. [2021-11-07 07:48:46,444 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 328 transitions, 6344 flow [2021-11-07 07:48:46,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 07:48:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-07 07:48:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1499 transitions. [2021-11-07 07:48:46,447 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8411896745230079 [2021-11-07 07:48:46,447 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1499 transitions. [2021-11-07 07:48:46,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1499 transitions. [2021-11-07 07:48:46,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:46,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1499 transitions. [2021-11-07 07:48:46,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.51851851851852) internal successors, (1499), 27 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:46,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:46,456 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:46,456 INFO L186 Difference]: Start difference. First operand has 288 places, 285 transitions, 4477 flow. Second operand 27 states and 1499 transitions. [2021-11-07 07:48:46,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 328 transitions, 6344 flow [2021-11-07 07:48:46,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 328 transitions, 6119 flow, removed 86 selfloop flow, removed 12 redundant places. [2021-11-07 07:48:46,639 INFO L242 Difference]: Finished difference. Result has 309 places, 297 transitions, 5072 flow [2021-11-07 07:48:46,639 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4340, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5072, PETRI_PLACES=309, PETRI_TRANSITIONS=297} [2021-11-07 07:48:46,640 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 243 predicate places. [2021-11-07 07:48:46,640 INFO L470 AbstractCegarLoop]: Abstraction has has 309 places, 297 transitions, 5072 flow [2021-11-07 07:48:46,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:46,641 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:46,641 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:46,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:46,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-07 07:48:46,869 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:46,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:46,869 INFO L85 PathProgramCache]: Analyzing trace with hash 777552157, now seen corresponding path program 16 times [2021-11-07 07:48:46,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:46,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33718303] [2021-11-07 07:48:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:46,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:47,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:47,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33718303] [2021-11-07 07:48:47,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33718303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:47,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86197493] [2021-11-07 07:48:47,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:48:47,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:47,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:47,079 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:47,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 07:48:47,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:48:47,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:47,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:48:47,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:48,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86197493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:48,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:48,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-07 07:48:48,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559114557] [2021-11-07 07:48:48,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:48:48,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:48,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:48:48,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:48:48,089 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:48,090 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 297 transitions, 5072 flow. Second operand has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:48,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:48,091 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:48,091 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:48,853 INFO L129 PetriNetUnfolder]: 231/1652 cut-off events. [2021-11-07 07:48:48,854 INFO L130 PetriNetUnfolder]: For 45974/46164 co-relation queries the response was YES. [2021-11-07 07:48:48,877 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7768 conditions, 1652 events. 231/1652 cut-off events. For 45974/46164 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 13256 event pairs, 0 based on Foata normal form. 72/1546 useless extension candidates. Maximal degree in co-relation 7631. Up to 262 conditions per place. [2021-11-07 07:48:48,889 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 106 selfloop transitions, 178 changer transitions 8/336 dead transitions. [2021-11-07 07:48:48,890 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 336 transitions, 6907 flow [2021-11-07 07:48:48,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 07:48:48,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-07 07:48:48,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1555 transitions. [2021-11-07 07:48:48,892 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8414502164502164 [2021-11-07 07:48:48,893 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1555 transitions. [2021-11-07 07:48:48,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1555 transitions. [2021-11-07 07:48:48,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:48,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1555 transitions. [2021-11-07 07:48:48,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.535714285714285) internal successors, (1555), 28 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:48,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:48,901 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:48,901 INFO L186 Difference]: Start difference. First operand has 309 places, 297 transitions, 5072 flow. Second operand 28 states and 1555 transitions. [2021-11-07 07:48:48,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 336 transitions, 6907 flow [2021-11-07 07:48:49,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 336 transitions, 6551 flow, removed 102 selfloop flow, removed 20 redundant places. [2021-11-07 07:48:49,106 INFO L242 Difference]: Finished difference. Result has 322 places, 309 transitions, 5558 flow [2021-11-07 07:48:49,106 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4770, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5558, PETRI_PLACES=322, PETRI_TRANSITIONS=309} [2021-11-07 07:48:49,107 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 256 predicate places. [2021-11-07 07:48:49,107 INFO L470 AbstractCegarLoop]: Abstraction has has 322 places, 309 transitions, 5558 flow [2021-11-07 07:48:49,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:49,107 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:49,108 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:49,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:49,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:49,321 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:49,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:49,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1434787855, now seen corresponding path program 17 times [2021-11-07 07:48:49,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:49,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332179000] [2021-11-07 07:48:49,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:49,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:49,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:49,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332179000] [2021-11-07 07:48:49,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332179000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:49,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119881912] [2021-11-07 07:48:49,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:48:49,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:49,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:49,532 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:49,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 07:48:50,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-07 07:48:50,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:50,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:48:50,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:50,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119881912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:50,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:50,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-11-07 07:48:50,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037903997] [2021-11-07 07:48:50,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:48:50,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:50,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:48:50,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:48:50,562 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:50,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 309 transitions, 5558 flow. Second operand has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:50,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:50,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:50,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:51,402 INFO L129 PetriNetUnfolder]: 247/1796 cut-off events. [2021-11-07 07:48:51,403 INFO L130 PetriNetUnfolder]: For 53358/53553 co-relation queries the response was YES. [2021-11-07 07:48:51,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8636 conditions, 1796 events. 247/1796 cut-off events. For 53358/53553 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 14877 event pairs, 0 based on Foata normal form. 74/1678 useless extension candidates. Maximal degree in co-relation 8494. Up to 286 conditions per place. [2021-11-07 07:48:51,438 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 103 selfloop transitions, 199 changer transitions 8/354 dead transitions. [2021-11-07 07:48:51,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 354 transitions, 7648 flow [2021-11-07 07:48:51,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 07:48:51,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-07 07:48:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1611 transitions. [2021-11-07 07:48:51,442 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841692789968652 [2021-11-07 07:48:51,442 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1611 transitions. [2021-11-07 07:48:51,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1611 transitions. [2021-11-07 07:48:51,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:51,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1611 transitions. [2021-11-07 07:48:51,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.55172413793103) internal successors, (1611), 29 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:51,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:51,451 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:51,451 INFO L186 Difference]: Start difference. First operand has 322 places, 309 transitions, 5558 flow. Second operand 29 states and 1611 transitions. [2021-11-07 07:48:51,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 354 transitions, 7648 flow [2021-11-07 07:48:51,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 354 transitions, 7218 flow, removed 129 selfloop flow, removed 21 redundant places. [2021-11-07 07:48:51,680 INFO L242 Difference]: Finished difference. Result has 334 places, 326 transitions, 6209 flow [2021-11-07 07:48:51,681 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=5264, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6209, PETRI_PLACES=334, PETRI_TRANSITIONS=326} [2021-11-07 07:48:51,681 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 268 predicate places. [2021-11-07 07:48:51,682 INFO L470 AbstractCegarLoop]: Abstraction has has 334 places, 326 transitions, 6209 flow [2021-11-07 07:48:51,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:51,682 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:51,682 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:51,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:51,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:51,909 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:51,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:51,910 INFO L85 PathProgramCache]: Analyzing trace with hash 492394175, now seen corresponding path program 18 times [2021-11-07 07:48:51,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:51,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526988280] [2021-11-07 07:48:51,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:51,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:52,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:52,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526988280] [2021-11-07 07:48:52,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526988280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:52,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40756707] [2021-11-07 07:48:52,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:48:52,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:52,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:52,097 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:52,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 07:48:52,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-07 07:48:52,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:52,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:48:52,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:53,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40756707] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:53,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:53,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-07 07:48:53,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141642390] [2021-11-07 07:48:53,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:48:53,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:53,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:48:53,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:48:53,038 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:53,039 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 326 transitions, 6209 flow. Second operand has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:53,039 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:53,039 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:53,039 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:53,849 INFO L129 PetriNetUnfolder]: 262/1916 cut-off events. [2021-11-07 07:48:53,849 INFO L130 PetriNetUnfolder]: For 57460/57656 co-relation queries the response was YES. [2021-11-07 07:48:53,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9297 conditions, 1916 events. 262/1916 cut-off events. For 57460/57656 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 16184 event pairs, 0 based on Foata normal form. 87/1798 useless extension candidates. Maximal degree in co-relation 9151. Up to 308 conditions per place. [2021-11-07 07:48:53,892 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 90 selfloop transitions, 228 changer transitions 8/370 dead transitions. [2021-11-07 07:48:53,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 370 transitions, 8276 flow [2021-11-07 07:48:53,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 07:48:53,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-07 07:48:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1667 transitions. [2021-11-07 07:48:53,896 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841919191919192 [2021-11-07 07:48:53,897 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1667 transitions. [2021-11-07 07:48:53,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1667 transitions. [2021-11-07 07:48:53,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:53,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1667 transitions. [2021-11-07 07:48:53,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.56666666666667) internal successors, (1667), 30 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:53,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:53,905 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:53,905 INFO L186 Difference]: Start difference. First operand has 334 places, 326 transitions, 6209 flow. Second operand 30 states and 1667 transitions. [2021-11-07 07:48:53,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 370 transitions, 8276 flow [2021-11-07 07:48:54,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 370 transitions, 7802 flow, removed 110 selfloop flow, removed 23 redundant places. [2021-11-07 07:48:54,130 INFO L242 Difference]: Finished difference. Result has 346 places, 344 transitions, 6808 flow [2021-11-07 07:48:54,131 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=5799, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6808, PETRI_PLACES=346, PETRI_TRANSITIONS=344} [2021-11-07 07:48:54,131 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 280 predicate places. [2021-11-07 07:48:54,131 INFO L470 AbstractCegarLoop]: Abstraction has has 346 places, 344 transitions, 6808 flow [2021-11-07 07:48:54,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:54,132 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:54,132 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:54,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:54,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:54,341 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:54,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:54,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1570428305, now seen corresponding path program 19 times [2021-11-07 07:48:54,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:54,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430867216] [2021-11-07 07:48:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:54,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:54,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:54,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430867216] [2021-11-07 07:48:54,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430867216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:54,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866911867] [2021-11-07 07:48:54,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:48:54,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:54,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:54,505 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:54,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 07:48:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:55,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:48:55,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:55,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866911867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:55,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:55,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-11-07 07:48:55,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692286443] [2021-11-07 07:48:55,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:48:55,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:55,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:48:55,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:48:55,432 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:55,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 344 transitions, 6808 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:55,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:55,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:55,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:56,513 INFO L129 PetriNetUnfolder]: 282/2020 cut-off events. [2021-11-07 07:48:56,513 INFO L130 PetriNetUnfolder]: For 67627/67877 co-relation queries the response was YES. [2021-11-07 07:48:56,556 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10326 conditions, 2020 events. 282/2020 cut-off events. For 67627/67877 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 17300 event pairs, 0 based on Foata normal form. 95/1901 useless extension candidates. Maximal degree in co-relation 10174. Up to 332 conditions per place. [2021-11-07 07:48:56,572 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 84 selfloop transitions, 254 changer transitions 14/396 dead transitions. [2021-11-07 07:48:56,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 396 transitions, 9603 flow [2021-11-07 07:48:56,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 07:48:56,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-07 07:48:56,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2004 transitions. [2021-11-07 07:48:56,575 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2021-11-07 07:48:56,576 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2004 transitions. [2021-11-07 07:48:56,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2004 transitions. [2021-11-07 07:48:56,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:56,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2004 transitions. [2021-11-07 07:48:56,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.666666666666664) internal successors, (2004), 36 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:56,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:56,584 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:56,584 INFO L186 Difference]: Start difference. First operand has 346 places, 344 transitions, 6808 flow. Second operand 36 states and 2004 transitions. [2021-11-07 07:48:56,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 396 transitions, 9603 flow [2021-11-07 07:48:56,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 396 transitions, 9002 flow, removed 170 selfloop flow, removed 23 redundant places. [2021-11-07 07:48:56,861 INFO L242 Difference]: Finished difference. Result has 368 places, 362 transitions, 7631 flow [2021-11-07 07:48:56,862 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=6415, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=7631, PETRI_PLACES=368, PETRI_TRANSITIONS=362} [2021-11-07 07:48:56,862 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 302 predicate places. [2021-11-07 07:48:56,863 INFO L470 AbstractCegarLoop]: Abstraction has has 368 places, 362 transitions, 7631 flow [2021-11-07 07:48:56,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:56,863 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:56,863 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:56,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:57,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:57,064 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:57,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:57,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1081586959, now seen corresponding path program 20 times [2021-11-07 07:48:57,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:57,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476627221] [2021-11-07 07:48:57,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:57,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:57,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:57,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476627221] [2021-11-07 07:48:57,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476627221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:57,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225714420] [2021-11-07 07:48:57,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:48:57,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:57,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:57,262 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:57,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 07:48:57,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:48:57,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:57,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:48:57,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:58,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225714420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:58,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:58,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-11-07 07:48:58,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389732606] [2021-11-07 07:48:58,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:48:58,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:58,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:48:58,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:48:58,323 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:48:58,324 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 362 transitions, 7631 flow. Second operand has 17 states, 17 states have (on average 54.05882352941177) internal successors, (919), 17 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:58,324 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:58,324 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:48:58,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:59,068 INFO L129 PetriNetUnfolder]: 280/2018 cut-off events. [2021-11-07 07:48:59,068 INFO L130 PetriNetUnfolder]: For 83832/84100 co-relation queries the response was YES. [2021-11-07 07:48:59,096 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10967 conditions, 2018 events. 280/2018 cut-off events. For 83832/84100 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 17231 event pairs, 0 based on Foata normal form. 45/1845 useless extension candidates. Maximal degree in co-relation 10805. Up to 422 conditions per place. [2021-11-07 07:48:59,107 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 287 selfloop transitions, 55 changer transitions 8/394 dead transitions. [2021-11-07 07:48:59,107 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 394 transitions, 9643 flow [2021-11-07 07:48:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 07:48:59,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-07 07:48:59,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1166 transitions. [2021-11-07 07:48:59,109 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2021-11-07 07:48:59,109 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1166 transitions. [2021-11-07 07:48:59,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1166 transitions. [2021-11-07 07:48:59,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:59,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1166 transitions. [2021-11-07 07:48:59,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.523809523809526) internal successors, (1166), 21 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:59,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:59,114 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:59,114 INFO L186 Difference]: Start difference. First operand has 368 places, 362 transitions, 7631 flow. Second operand 21 states and 1166 transitions. [2021-11-07 07:48:59,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 394 transitions, 9643 flow [2021-11-07 07:48:59,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 394 transitions, 8926 flow, removed 209 selfloop flow, removed 25 redundant places. [2021-11-07 07:48:59,422 INFO L242 Difference]: Finished difference. Result has 363 places, 364 transitions, 7207 flow [2021-11-07 07:48:59,423 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=6966, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7207, PETRI_PLACES=363, PETRI_TRANSITIONS=364} [2021-11-07 07:48:59,423 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 297 predicate places. [2021-11-07 07:48:59,423 INFO L470 AbstractCegarLoop]: Abstraction has has 363 places, 364 transitions, 7207 flow [2021-11-07 07:48:59,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.05882352941177) internal successors, (919), 17 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:59,423 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:59,424 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:59,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:59,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 07:48:59,624 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:59,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:59,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2035871063, now seen corresponding path program 21 times [2021-11-07 07:48:59,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:59,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134433909] [2021-11-07 07:48:59,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:59,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:59,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:59,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134433909] [2021-11-07 07:48:59,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134433909] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:59,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624177063] [2021-11-07 07:48:59,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:48:59,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:59,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:59,870 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:59,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 07:49:00,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-07 07:49:00,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:00,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:49:00,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:00,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624177063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:00,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:00,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-07 07:49:00,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638945821] [2021-11-07 07:49:00,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:49:00,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:00,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:49:00,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:49:00,983 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:49:00,984 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 364 transitions, 7207 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:00,984 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:49:00,984 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:49:00,984 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:49:01,836 INFO L129 PetriNetUnfolder]: 282/2057 cut-off events. [2021-11-07 07:49:01,837 INFO L130 PetriNetUnfolder]: For 85429/85656 co-relation queries the response was YES. [2021-11-07 07:49:01,868 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10940 conditions, 2057 events. 282/2057 cut-off events. For 85429/85656 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 17598 event pairs, 0 based on Foata normal form. 55/1890 useless extension candidates. Maximal degree in co-relation 10776. Up to 342 conditions per place. [2021-11-07 07:49:01,879 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 244 selfloop transitions, 101 changer transitions 8/397 dead transitions. [2021-11-07 07:49:01,879 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 397 transitions, 9323 flow [2021-11-07 07:49:01,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:49:01,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-07 07:49:01,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1386 transitions. [2021-11-07 07:49:01,882 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.84 [2021-11-07 07:49:01,882 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1386 transitions. [2021-11-07 07:49:01,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1386 transitions. [2021-11-07 07:49:01,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:49:01,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1386 transitions. [2021-11-07 07:49:01,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.44) internal successors, (1386), 25 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:01,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:01,888 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:01,888 INFO L186 Difference]: Start difference. First operand has 363 places, 364 transitions, 7207 flow. Second operand 25 states and 1386 transitions. [2021-11-07 07:49:01,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 397 transitions, 9323 flow [2021-11-07 07:49:02,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 397 transitions, 9016 flow, removed 103 selfloop flow, removed 20 redundant places. [2021-11-07 07:49:02,154 INFO L242 Difference]: Finished difference. Result has 369 places, 366 transitions, 7350 flow [2021-11-07 07:49:02,155 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=7010, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7350, PETRI_PLACES=369, PETRI_TRANSITIONS=366} [2021-11-07 07:49:02,155 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 303 predicate places. [2021-11-07 07:49:02,155 INFO L470 AbstractCegarLoop]: Abstraction has has 369 places, 366 transitions, 7350 flow [2021-11-07 07:49:02,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:02,155 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:49:02,155 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:02,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:02,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 07:49:02,356 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:49:02,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:02,356 INFO L85 PathProgramCache]: Analyzing trace with hash 958080887, now seen corresponding path program 22 times [2021-11-07 07:49:02,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:02,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860790984] [2021-11-07 07:49:02,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:02,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:02,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:02,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860790984] [2021-11-07 07:49:02,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860790984] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:02,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298402334] [2021-11-07 07:49:02,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:49:02,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:02,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:02,537 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:02,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 07:49:03,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:49:03,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:03,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:49:03,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:03,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298402334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:03,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:03,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-11-07 07:49:03,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768495370] [2021-11-07 07:49:03,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:49:03,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:03,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:49:03,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:49:03,719 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:49:03,720 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 366 transitions, 7350 flow. Second operand has 17 states, 17 states have (on average 54.05882352941177) internal successors, (919), 17 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:03,720 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:49:03,720 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:49:03,720 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:49:04,595 INFO L129 PetriNetUnfolder]: 300/2198 cut-off events. [2021-11-07 07:49:04,595 INFO L130 PetriNetUnfolder]: For 87850/88111 co-relation queries the response was YES. [2021-11-07 07:49:04,619 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11642 conditions, 2198 events. 300/2198 cut-off events. For 87850/88111 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 19241 event pairs, 0 based on Foata normal form. 78/2040 useless extension candidates. Maximal degree in co-relation 11478. Up to 354 conditions per place. [2021-11-07 07:49:04,637 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 160 selfloop transitions, 200 changer transitions 8/412 dead transitions. [2021-11-07 07:49:04,637 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 412 transitions, 9896 flow [2021-11-07 07:49:04,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 07:49:04,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-07 07:49:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1443 transitions. [2021-11-07 07:49:04,640 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-11-07 07:49:04,640 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1443 transitions. [2021-11-07 07:49:04,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1443 transitions. [2021-11-07 07:49:04,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:49:04,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1443 transitions. [2021-11-07 07:49:04,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.5) internal successors, (1443), 26 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:04,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:04,643 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:04,643 INFO L186 Difference]: Start difference. First operand has 369 places, 366 transitions, 7350 flow. Second operand 26 states and 1443 transitions. [2021-11-07 07:49:04,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 412 transitions, 9896 flow [2021-11-07 07:49:04,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 412 transitions, 9534 flow, removed 89 selfloop flow, removed 22 redundant places. [2021-11-07 07:49:04,924 INFO L242 Difference]: Finished difference. Result has 380 places, 386 transitions, 8256 flow [2021-11-07 07:49:04,925 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=7080, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8256, PETRI_PLACES=380, PETRI_TRANSITIONS=386} [2021-11-07 07:49:04,925 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 314 predicate places. [2021-11-07 07:49:04,925 INFO L470 AbstractCegarLoop]: Abstraction has has 380 places, 386 transitions, 8256 flow [2021-11-07 07:49:04,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.05882352941177) internal successors, (919), 17 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:04,926 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:49:04,926 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:04,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:05,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 07:49:05,141 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:49:05,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:05,141 INFO L85 PathProgramCache]: Analyzing trace with hash -713071319, now seen corresponding path program 23 times [2021-11-07 07:49:05,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:05,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829092916] [2021-11-07 07:49:05,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:05,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:05,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:05,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829092916] [2021-11-07 07:49:05,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829092916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:05,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283363420] [2021-11-07 07:49:05,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:49:05,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:05,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:05,334 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:05,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 07:49:06,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-07 07:49:06,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:06,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:49:06,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:06,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283363420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:06,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:06,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-07 07:49:06,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010659235] [2021-11-07 07:49:06,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:49:06,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:06,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:49:06,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:49:06,459 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:49:06,459 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 386 transitions, 8256 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:06,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:49:06,459 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:49:06,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:49:07,480 INFO L129 PetriNetUnfolder]: 309/2279 cut-off events. [2021-11-07 07:49:07,481 INFO L130 PetriNetUnfolder]: For 92517/92766 co-relation queries the response was YES. [2021-11-07 07:49:07,513 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12278 conditions, 2279 events. 309/2279 cut-off events. For 92517/92766 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 20228 event pairs, 0 based on Foata normal form. 91/2126 useless extension candidates. Maximal degree in co-relation 12106. Up to 370 conditions per place. [2021-11-07 07:49:07,524 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 143 selfloop transitions, 228 changer transitions 8/423 dead transitions. [2021-11-07 07:49:07,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 423 transitions, 10663 flow [2021-11-07 07:49:07,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 07:49:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-07 07:49:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1610 transitions. [2021-11-07 07:49:07,526 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8411703239289446 [2021-11-07 07:49:07,526 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1610 transitions. [2021-11-07 07:49:07,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1610 transitions. [2021-11-07 07:49:07,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:49:07,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1610 transitions. [2021-11-07 07:49:07,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.51724137931034) internal successors, (1610), 29 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:07,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:07,530 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:07,531 INFO L186 Difference]: Start difference. First operand has 380 places, 386 transitions, 8256 flow. Second operand 29 states and 1610 transitions. [2021-11-07 07:49:07,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 423 transitions, 10663 flow [2021-11-07 07:49:07,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 423 transitions, 10303 flow, removed 103 selfloop flow, removed 16 redundant places. [2021-11-07 07:49:07,929 INFO L242 Difference]: Finished difference. Result has 399 places, 396 transitions, 8977 flow [2021-11-07 07:49:07,930 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=7996, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8977, PETRI_PLACES=399, PETRI_TRANSITIONS=396} [2021-11-07 07:49:07,930 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 333 predicate places. [2021-11-07 07:49:07,930 INFO L470 AbstractCegarLoop]: Abstraction has has 399 places, 396 transitions, 8977 flow [2021-11-07 07:49:07,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:07,930 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:49:07,931 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:07,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:08,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:08,131 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:49:08,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:08,132 INFO L85 PathProgramCache]: Analyzing trace with hash -121671927, now seen corresponding path program 24 times [2021-11-07 07:49:08,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:08,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006072106] [2021-11-07 07:49:08,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:08,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:08,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:08,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006072106] [2021-11-07 07:49:08,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006072106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:08,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225925089] [2021-11-07 07:49:08,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:49:08,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:08,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:08,340 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:08,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 07:49:09,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 07:49:09,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:09,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:49:09,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:09,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225925089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:09,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:09,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-11-07 07:49:09,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30935019] [2021-11-07 07:49:09,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:49:09,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:09,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:49:09,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:49:09,443 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:49:09,443 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 396 transitions, 8977 flow. Second operand has 17 states, 17 states have (on average 54.05882352941177) internal successors, (919), 17 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:09,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:49:09,444 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:49:09,444 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:49:10,483 INFO L129 PetriNetUnfolder]: 326/2358 cut-off events. [2021-11-07 07:49:10,483 INFO L130 PetriNetUnfolder]: For 105962/106230 co-relation queries the response was YES. [2021-11-07 07:49:10,521 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13393 conditions, 2358 events. 326/2358 cut-off events. For 105962/106230 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 20829 event pairs, 0 based on Foata normal form. 109/2219 useless extension candidates. Maximal degree in co-relation 13214. Up to 392 conditions per place. [2021-11-07 07:49:10,535 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 85 selfloop transitions, 301 changer transitions 8/438 dead transitions. [2021-11-07 07:49:10,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 438 transitions, 11820 flow [2021-11-07 07:49:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 07:49:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-07 07:49:10,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1783 transitions. [2021-11-07 07:49:10,537 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8442234848484849 [2021-11-07 07:49:10,537 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1783 transitions. [2021-11-07 07:49:10,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1783 transitions. [2021-11-07 07:49:10,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:49:10,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1783 transitions. [2021-11-07 07:49:10,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.71875) internal successors, (1783), 32 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:10,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:10,544 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:10,544 INFO L186 Difference]: Start difference. First operand has 399 places, 396 transitions, 8977 flow. Second operand 32 states and 1783 transitions. [2021-11-07 07:49:10,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 438 transitions, 11820 flow [2021-11-07 07:49:10,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 438 transitions, 11299 flow, removed 133 selfloop flow, removed 21 redundant places. [2021-11-07 07:49:10,938 INFO L242 Difference]: Finished difference. Result has 413 places, 404 transitions, 9592 flow [2021-11-07 07:49:10,939 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=8562, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9592, PETRI_PLACES=413, PETRI_TRANSITIONS=404} [2021-11-07 07:49:10,939 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 347 predicate places. [2021-11-07 07:49:10,939 INFO L470 AbstractCegarLoop]: Abstraction has has 413 places, 404 transitions, 9592 flow [2021-11-07 07:49:10,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.05882352941177) internal successors, (919), 17 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:10,939 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:49:10,940 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:10,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:11,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-07 07:49:11,145 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:49:11,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:11,146 INFO L85 PathProgramCache]: Analyzing trace with hash -147754421, now seen corresponding path program 25 times [2021-11-07 07:49:11,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:11,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344531562] [2021-11-07 07:49:11,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:11,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:11,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:11,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344531562] [2021-11-07 07:49:11,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344531562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:11,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18598750] [2021-11-07 07:49:11,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:49:11,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:11,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:11,329 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:11,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 07:49:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:12,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:49:12,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:12,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18598750] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:12,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:12,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-07 07:49:12,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454151745] [2021-11-07 07:49:12,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:49:12,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:12,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:49:12,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:49:12,466 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:49:12,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 404 transitions, 9592 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:12,467 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:49:12,467 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:49:12,467 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:49:13,766 INFO L129 PetriNetUnfolder]: 321/2357 cut-off events. [2021-11-07 07:49:13,766 INFO L130 PetriNetUnfolder]: For 119564/119897 co-relation queries the response was YES. [2021-11-07 07:49:13,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13846 conditions, 2357 events. 321/2357 cut-off events. For 119564/119897 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 20974 event pairs, 0 based on Foata normal form. 122/2230 useless extension candidates. Maximal degree in co-relation 13663. Up to 386 conditions per place. [2021-11-07 07:49:13,828 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 76 selfloop transitions, 310 changer transitions 11/441 dead transitions. [2021-11-07 07:49:13,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 441 transitions, 12466 flow [2021-11-07 07:49:13,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 07:49:13,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-07 07:49:13,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1891 transitions. [2021-11-07 07:49:13,832 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8426916221033868 [2021-11-07 07:49:13,832 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1891 transitions. [2021-11-07 07:49:13,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1891 transitions. [2021-11-07 07:49:13,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:49:13,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1891 transitions. [2021-11-07 07:49:13,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.61764705882353) internal successors, (1891), 34 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:13,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:13,839 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:13,839 INFO L186 Difference]: Start difference. First operand has 413 places, 404 transitions, 9592 flow. Second operand 34 states and 1891 transitions. [2021-11-07 07:49:13,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 441 transitions, 12466 flow [2021-11-07 07:49:14,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 441 transitions, 11491 flow, removed 225 selfloop flow, removed 27 redundant places. [2021-11-07 07:49:14,258 INFO L242 Difference]: Finished difference. Result has 422 places, 407 transitions, 9670 flow [2021-11-07 07:49:14,258 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=8837, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9670, PETRI_PLACES=422, PETRI_TRANSITIONS=407} [2021-11-07 07:49:14,258 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 356 predicate places. [2021-11-07 07:49:14,258 INFO L470 AbstractCegarLoop]: Abstraction has has 422 places, 407 transitions, 9670 flow [2021-11-07 07:49:14,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:14,259 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:49:14,259 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:14,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:14,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:14,459 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:49:14,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:14,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1944490948, now seen corresponding path program 26 times [2021-11-07 07:49:14,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:14,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177198730] [2021-11-07 07:49:14,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:14,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:14,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:14,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177198730] [2021-11-07 07:49:14,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177198730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:14,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734833300] [2021-11-07 07:49:14,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:49:14,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:14,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:14,697 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:14,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 07:49:15,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:49:15,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:15,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:49:15,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:16,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734833300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:16,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:16,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-11-07 07:49:16,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506619209] [2021-11-07 07:49:16,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:49:16,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:16,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:49:16,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:49:16,084 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:49:16,084 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 407 transitions, 9670 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:16,085 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:49:16,085 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:49:16,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:49:16,940 INFO L129 PetriNetUnfolder]: 321/2357 cut-off events. [2021-11-07 07:49:16,940 INFO L130 PetriNetUnfolder]: For 111186/111458 co-relation queries the response was YES. [2021-11-07 07:49:16,981 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13651 conditions, 2357 events. 321/2357 cut-off events. For 111186/111458 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 20914 event pairs, 0 based on Foata normal form. 50/2154 useless extension candidates. Maximal degree in co-relation 13465. Up to 545 conditions per place. [2021-11-07 07:49:16,996 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 353 selfloop transitions, 31 changer transitions 8/436 dead transitions. [2021-11-07 07:49:16,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 436 transitions, 11785 flow [2021-11-07 07:49:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 07:49:16,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-07 07:49:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1165 transitions. [2021-11-07 07:49:16,997 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8405483405483406 [2021-11-07 07:49:16,998 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1165 transitions. [2021-11-07 07:49:16,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1165 transitions. [2021-11-07 07:49:16,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:49:16,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1165 transitions. [2021-11-07 07:49:17,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.476190476190474) internal successors, (1165), 21 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:17,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:17,003 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:17,003 INFO L186 Difference]: Start difference. First operand has 422 places, 407 transitions, 9670 flow. Second operand 21 states and 1165 transitions. [2021-11-07 07:49:17,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 436 transitions, 11785 flow [2021-11-07 07:49:17,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 436 transitions, 11128 flow, removed 71 selfloop flow, removed 30 redundant places. [2021-11-07 07:49:17,466 INFO L242 Difference]: Finished difference. Result has 414 places, 409 transitions, 9229 flow [2021-11-07 07:49:17,466 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=9027, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9229, PETRI_PLACES=414, PETRI_TRANSITIONS=409} [2021-11-07 07:49:17,467 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 348 predicate places. [2021-11-07 07:49:17,467 INFO L470 AbstractCegarLoop]: Abstraction has has 414 places, 409 transitions, 9229 flow [2021-11-07 07:49:17,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:17,467 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:49:17,468 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:17,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:17,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:17,668 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:49:17,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:17,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1365751672, now seen corresponding path program 27 times [2021-11-07 07:49:17,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:17,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700574044] [2021-11-07 07:49:17,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:17,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:17,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:17,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700574044] [2021-11-07 07:49:17,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700574044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:17,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18723355] [2021-11-07 07:49:17,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:49:17,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:17,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:17,918 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:17,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 07:49:18,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-07 07:49:18,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:18,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:49:18,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:19,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18723355] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:19,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:19,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-11-07 07:49:19,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186950477] [2021-11-07 07:49:19,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:49:19,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:19,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:49:19,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:49:19,525 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:49:19,526 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 409 transitions, 9229 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:19,526 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:49:19,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:49:19,526 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:49:20,575 INFO L129 PetriNetUnfolder]: 323/2389 cut-off events. [2021-11-07 07:49:20,575 INFO L130 PetriNetUnfolder]: For 122722/122989 co-relation queries the response was YES. [2021-11-07 07:49:20,619 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13842 conditions, 2389 events. 323/2389 cut-off events. For 122722/122989 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 21162 event pairs, 0 based on Foata normal form. 58/2191 useless extension candidates. Maximal degree in co-relation 13655. Up to 457 conditions per place. [2021-11-07 07:49:20,634 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 305 selfloop transitions, 82 changer transitions 8/439 dead transitions. [2021-11-07 07:49:20,634 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 439 transitions, 11485 flow [2021-11-07 07:49:20,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:49:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-07 07:49:20,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1388 transitions. [2021-11-07 07:49:20,636 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412121212121212 [2021-11-07 07:49:20,636 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1388 transitions. [2021-11-07 07:49:20,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1388 transitions. [2021-11-07 07:49:20,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:49:20,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1388 transitions. [2021-11-07 07:49:20,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.52) internal successors, (1388), 25 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:20,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:20,641 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:20,641 INFO L186 Difference]: Start difference. First operand has 414 places, 409 transitions, 9229 flow. Second operand 25 states and 1388 transitions. [2021-11-07 07:49:20,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 439 transitions, 11485 flow [2021-11-07 07:49:21,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 439 transitions, 11211 flow, removed 108 selfloop flow, removed 18 redundant places. [2021-11-07 07:49:21,066 INFO L242 Difference]: Finished difference. Result has 422 places, 411 transitions, 9364 flow [2021-11-07 07:49:21,067 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=9057, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=9364, PETRI_PLACES=422, PETRI_TRANSITIONS=411} [2021-11-07 07:49:21,067 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 356 predicate places. [2021-11-07 07:49:21,068 INFO L470 AbstractCegarLoop]: Abstraction has has 422 places, 411 transitions, 9364 flow [2021-11-07 07:49:21,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:21,068 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:49:21,068 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:21,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:21,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-07 07:49:21,297 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:49:21,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:21,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1755787082, now seen corresponding path program 28 times [2021-11-07 07:49:21,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:21,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334051927] [2021-11-07 07:49:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:21,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:21,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:21,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334051927] [2021-11-07 07:49:21,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334051927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:21,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923623659] [2021-11-07 07:49:21,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:49:21,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:21,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:21,546 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:21,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 07:49:22,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:49:22,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:22,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:49:22,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:23,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923623659] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:23,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:23,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-07 07:49:23,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87390556] [2021-11-07 07:49:23,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:49:23,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:23,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:49:23,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:49:23,110 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:49:23,111 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 411 transitions, 9364 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:23,111 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:49:23,111 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:49:23,111 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:49:24,329 INFO L129 PetriNetUnfolder]: 357/2695 cut-off events. [2021-11-07 07:49:24,330 INFO L130 PetriNetUnfolder]: For 136973/137235 co-relation queries the response was YES. [2021-11-07 07:49:24,379 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15582 conditions, 2695 events. 357/2695 cut-off events. For 136973/137235 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 24863 event pairs, 0 based on Foata normal form. 58/2464 useless extension candidates. Maximal degree in co-relation 15393. Up to 443 conditions per place. [2021-11-07 07:49:24,396 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 305 selfloop transitions, 124 changer transitions 8/481 dead transitions. [2021-11-07 07:49:24,396 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 481 transitions, 13041 flow [2021-11-07 07:49:24,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 07:49:24,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-07 07:49:24,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1497 transitions. [2021-11-07 07:49:24,398 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8400673400673401 [2021-11-07 07:49:24,398 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1497 transitions. [2021-11-07 07:49:24,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1497 transitions. [2021-11-07 07:49:24,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:49:24,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1497 transitions. [2021-11-07 07:49:24,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.44444444444444) internal successors, (1497), 27 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:24,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:24,403 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:24,403 INFO L186 Difference]: Start difference. First operand has 422 places, 411 transitions, 9364 flow. Second operand 27 states and 1497 transitions. [2021-11-07 07:49:24,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 481 transitions, 13041 flow [2021-11-07 07:49:25,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 481 transitions, 12692 flow, removed 97 selfloop flow, removed 22 redundant places. [2021-11-07 07:49:25,054 INFO L242 Difference]: Finished difference. Result has 437 places, 446 transitions, 10942 flow [2021-11-07 07:49:25,055 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=9107, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10942, PETRI_PLACES=437, PETRI_TRANSITIONS=446} [2021-11-07 07:49:25,056 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 371 predicate places. [2021-11-07 07:49:25,056 INFO L470 AbstractCegarLoop]: Abstraction has has 437 places, 446 transitions, 10942 flow [2021-11-07 07:49:25,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:25,056 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:49:25,057 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:25,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:25,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:25,285 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:49:25,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:25,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1641059862, now seen corresponding path program 29 times [2021-11-07 07:49:25,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:25,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677061064] [2021-11-07 07:49:25,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:25,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:25,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:25,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677061064] [2021-11-07 07:49:25,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677061064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:25,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128384147] [2021-11-07 07:49:25,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:49:25,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:25,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:25,519 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:25,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 07:49:26,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-07 07:49:26,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:26,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:49:26,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:26,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128384147] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:26,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:26,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-07 07:49:26,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216799127] [2021-11-07 07:49:26,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:49:26,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:26,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:49:26,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:49:26,885 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:49:26,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 446 transitions, 10942 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:26,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:49:26,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:49:26,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:49:28,228 INFO L129 PetriNetUnfolder]: 359/2713 cut-off events. [2021-11-07 07:49:28,228 INFO L130 PetriNetUnfolder]: For 145223/145489 co-relation queries the response was YES. [2021-11-07 07:49:28,275 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16002 conditions, 2713 events. 359/2713 cut-off events. For 145223/145489 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 25050 event pairs, 0 based on Foata normal form. 74/2496 useless extension candidates. Maximal degree in co-relation 15801. Up to 441 conditions per place. [2021-11-07 07:49:28,292 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 229 selfloop transitions, 200 changer transitions 8/481 dead transitions. [2021-11-07 07:49:28,292 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 481 transitions, 13464 flow [2021-11-07 07:49:28,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 07:49:28,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-07 07:49:28,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1609 transitions. [2021-11-07 07:49:28,294 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8406478578892372 [2021-11-07 07:49:28,294 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1609 transitions. [2021-11-07 07:49:28,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1609 transitions. [2021-11-07 07:49:28,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:49:28,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1609 transitions. [2021-11-07 07:49:28,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.48275862068966) internal successors, (1609), 29 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:28,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:28,300 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:28,300 INFO L186 Difference]: Start difference. First operand has 437 places, 446 transitions, 10942 flow. Second operand 29 states and 1609 transitions. [2021-11-07 07:49:28,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 481 transitions, 13464 flow [2021-11-07 07:49:28,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 481 transitions, 13140 flow, removed 120 selfloop flow, removed 15 redundant places. [2021-11-07 07:49:28,989 INFO L242 Difference]: Finished difference. Result has 452 places, 448 transitions, 11249 flow [2021-11-07 07:49:28,990 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=10678, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=11249, PETRI_PLACES=452, PETRI_TRANSITIONS=448} [2021-11-07 07:49:28,990 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 386 predicate places. [2021-11-07 07:49:28,990 INFO L470 AbstractCegarLoop]: Abstraction has has 452 places, 448 transitions, 11249 flow [2021-11-07 07:49:28,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:28,991 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:49:28,991 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:29,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:29,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-07 07:49:29,217 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:49:29,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:29,217 INFO L85 PathProgramCache]: Analyzing trace with hash 945590418, now seen corresponding path program 30 times [2021-11-07 07:49:29,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:29,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110981999] [2021-11-07 07:49:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:29,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:29,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:29,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110981999] [2021-11-07 07:49:29,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110981999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:29,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097904167] [2021-11-07 07:49:29,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:49:29,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:29,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:29,401 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:29,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 07:49:30,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 07:49:30,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:30,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:49:30,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:30,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097904167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:30,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:30,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-11-07 07:49:30,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793695544] [2021-11-07 07:49:30,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:49:30,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:30,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:49:30,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:49:30,835 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:49:30,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 448 transitions, 11249 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:30,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:49:30,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:49:30,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:49:32,206 INFO L129 PetriNetUnfolder]: 361/2724 cut-off events. [2021-11-07 07:49:32,206 INFO L130 PetriNetUnfolder]: For 151727/152019 co-relation queries the response was YES. [2021-11-07 07:49:32,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16358 conditions, 2724 events. 361/2724 cut-off events. For 151727/152019 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 25165 event pairs, 0 based on Foata normal form. 107/2539 useless extension candidates. Maximal degree in co-relation 16155. Up to 441 conditions per place. [2021-11-07 07:49:32,264 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 134 selfloop transitions, 292 changer transitions 8/478 dead transitions. [2021-11-07 07:49:32,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 478 transitions, 13858 flow [2021-11-07 07:49:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 07:49:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-07 07:49:32,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1777 transitions. [2021-11-07 07:49:32,266 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8413825757575758 [2021-11-07 07:49:32,267 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1777 transitions. [2021-11-07 07:49:32,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1777 transitions. [2021-11-07 07:49:32,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:49:32,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1777 transitions. [2021-11-07 07:49:32,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.53125) internal successors, (1777), 32 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:32,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:32,271 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:32,271 INFO L186 Difference]: Start difference. First operand has 452 places, 448 transitions, 11249 flow. Second operand 32 states and 1777 transitions. [2021-11-07 07:49:32,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 478 transitions, 13858 flow [2021-11-07 07:49:32,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 478 transitions, 13265 flow, removed 128 selfloop flow, removed 28 redundant places. [2021-11-07 07:49:32,859 INFO L242 Difference]: Finished difference. Result has 457 places, 450 transitions, 11561 flow [2021-11-07 07:49:32,860 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=10790, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=11561, PETRI_PLACES=457, PETRI_TRANSITIONS=450} [2021-11-07 07:49:32,860 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 391 predicate places. [2021-11-07 07:49:32,860 INFO L470 AbstractCegarLoop]: Abstraction has has 457 places, 450 transitions, 11561 flow [2021-11-07 07:49:32,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:32,860 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:49:32,861 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:32,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:33,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-07 07:49:33,061 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:49:33,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:33,062 INFO L85 PathProgramCache]: Analyzing trace with hash -2024931326, now seen corresponding path program 31 times [2021-11-07 07:49:33,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:33,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002117796] [2021-11-07 07:49:33,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:33,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:33,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:33,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002117796] [2021-11-07 07:49:33,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002117796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:33,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056632112] [2021-11-07 07:49:33,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:49:33,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:33,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:33,250 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:33,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 07:49:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:34,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:49:34,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:34,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056632112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:34,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:34,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-07 07:49:34,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137994721] [2021-11-07 07:49:34,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:49:34,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:34,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:49:34,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:49:34,837 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:49:34,838 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 450 transitions, 11561 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:34,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:49:34,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:49:34,838 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:49:36,204 INFO L129 PetriNetUnfolder]: 366/2776 cut-off events. [2021-11-07 07:49:36,204 INFO L130 PetriNetUnfolder]: For 148644/148908 co-relation queries the response was YES. [2021-11-07 07:49:36,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16595 conditions, 2776 events. 366/2776 cut-off events. For 148644/148908 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 25765 event pairs, 0 based on Foata normal form. 109/2588 useless extension candidates. Maximal degree in co-relation 16394. Up to 451 conditions per place. [2021-11-07 07:49:36,259 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 123 selfloop transitions, 310 changer transitions 8/485 dead transitions. [2021-11-07 07:49:36,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 485 transitions, 14351 flow [2021-11-07 07:49:36,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 07:49:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-07 07:49:36,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1833 transitions. [2021-11-07 07:49:36,262 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8415977961432507 [2021-11-07 07:49:36,262 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1833 transitions. [2021-11-07 07:49:36,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1833 transitions. [2021-11-07 07:49:36,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:49:36,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1833 transitions. [2021-11-07 07:49:36,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.54545454545455) internal successors, (1833), 33 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:36,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:36,270 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:36,271 INFO L186 Difference]: Start difference. First operand has 457 places, 450 transitions, 11561 flow. Second operand 33 states and 1833 transitions. [2021-11-07 07:49:36,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 485 transitions, 14351 flow [2021-11-07 07:49:36,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 485 transitions, 13570 flow, removed 112 selfloop flow, removed 31 redundant places. [2021-11-07 07:49:36,828 INFO L242 Difference]: Finished difference. Result has 463 places, 456 transitions, 11945 flow [2021-11-07 07:49:36,829 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=10888, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=11945, PETRI_PLACES=463, PETRI_TRANSITIONS=456} [2021-11-07 07:49:36,829 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 397 predicate places. [2021-11-07 07:49:36,830 INFO L470 AbstractCegarLoop]: Abstraction has has 463 places, 456 transitions, 11945 flow [2021-11-07 07:49:36,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:36,830 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:49:36,830 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:36,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-07 07:49:37,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-07 07:49:37,057 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:49:37,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:37,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1742956660, now seen corresponding path program 32 times [2021-11-07 07:49:37,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:37,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608441836] [2021-11-07 07:49:37,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:37,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:37,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:37,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608441836] [2021-11-07 07:49:37,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608441836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:37,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157187567] [2021-11-07 07:49:37,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:49:37,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:37,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:37,251 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:37,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 07:49:38,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:49:38,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:38,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:49:38,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:38,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157187567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:38,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:38,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-11-07 07:49:38,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736590198] [2021-11-07 07:49:38,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:49:38,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:38,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:49:38,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:49:38,636 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:49:38,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 456 transitions, 11945 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:38,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:49:38,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:49:38,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:49:40,070 INFO L129 PetriNetUnfolder]: 374/2834 cut-off events. [2021-11-07 07:49:40,070 INFO L130 PetriNetUnfolder]: For 159940/160218 co-relation queries the response was YES. [2021-11-07 07:49:40,114 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17236 conditions, 2834 events. 374/2834 cut-off events. For 159940/160218 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 26445 event pairs, 0 based on Foata normal form. 115/2646 useless extension candidates. Maximal degree in co-relation 17032. Up to 465 conditions per place. [2021-11-07 07:49:40,129 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 114 selfloop transitions, 330 changer transitions 8/496 dead transitions. [2021-11-07 07:49:40,129 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 496 transitions, 14895 flow [2021-11-07 07:49:40,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 07:49:40,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-07 07:49:40,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1889 transitions. [2021-11-07 07:49:40,131 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8418003565062389 [2021-11-07 07:49:40,131 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1889 transitions. [2021-11-07 07:49:40,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1889 transitions. [2021-11-07 07:49:40,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:49:40,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1889 transitions. [2021-11-07 07:49:40,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.55882352941177) internal successors, (1889), 34 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:40,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:40,138 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:40,138 INFO L186 Difference]: Start difference. First operand has 463 places, 456 transitions, 11945 flow. Second operand 34 states and 1889 transitions. [2021-11-07 07:49:40,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 496 transitions, 14895 flow [2021-11-07 07:49:40,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 496 transitions, 14189 flow, removed 128 selfloop flow, removed 27 redundant places. [2021-11-07 07:49:40,740 INFO L242 Difference]: Finished difference. Result has 473 places, 467 transitions, 12445 flow [2021-11-07 07:49:40,741 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=11315, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=12445, PETRI_PLACES=473, PETRI_TRANSITIONS=467} [2021-11-07 07:49:40,741 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 407 predicate places. [2021-11-07 07:49:40,741 INFO L470 AbstractCegarLoop]: Abstraction has has 473 places, 467 transitions, 12445 flow [2021-11-07 07:49:40,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:40,742 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:49:40,742 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:40,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-07 07:49:40,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 07:49:40,942 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:49:40,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:40,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2091209574, now seen corresponding path program 33 times [2021-11-07 07:49:40,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:40,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273245961] [2021-11-07 07:49:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:40,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:41,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:41,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273245961] [2021-11-07 07:49:41,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273245961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:41,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539426331] [2021-11-07 07:49:41,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:49:41,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:41,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:41,145 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:41,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 07:49:42,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-07 07:49:42,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:42,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:49:42,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:42,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539426331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:42,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:42,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-11-07 07:49:42,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937792264] [2021-11-07 07:49:42,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:49:42,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:42,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:49:42,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:49:42,852 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:49:42,853 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 467 transitions, 12445 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:42,853 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:49:42,853 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:49:42,853 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:49:44,376 INFO L129 PetriNetUnfolder]: 392/2914 cut-off events. [2021-11-07 07:49:44,377 INFO L130 PetriNetUnfolder]: For 178478/178853 co-relation queries the response was YES. [2021-11-07 07:49:44,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18476 conditions, 2914 events. 392/2914 cut-off events. For 178478/178853 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 27096 event pairs, 0 based on Foata normal form. 131/2735 useless extension candidates. Maximal degree in co-relation 18268. Up to 487 conditions per place. [2021-11-07 07:49:44,464 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 103 selfloop transitions, 356 changer transitions 8/511 dead transitions. [2021-11-07 07:49:44,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 511 transitions, 15813 flow [2021-11-07 07:49:44,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 07:49:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-07 07:49:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2005 transitions. [2021-11-07 07:49:44,467 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8438552188552189 [2021-11-07 07:49:44,468 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2005 transitions. [2021-11-07 07:49:44,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2005 transitions. [2021-11-07 07:49:44,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:49:44,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2005 transitions. [2021-11-07 07:49:44,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.69444444444444) internal successors, (2005), 36 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:44,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:44,474 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:44,474 INFO L186 Difference]: Start difference. First operand has 473 places, 467 transitions, 12445 flow. Second operand 36 states and 2005 transitions. [2021-11-07 07:49:44,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 511 transitions, 15813 flow [2021-11-07 07:49:45,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 511 transitions, 14946 flow, removed 168 selfloop flow, removed 29 redundant places. [2021-11-07 07:49:45,284 INFO L242 Difference]: Finished difference. Result has 485 places, 476 transitions, 13063 flow [2021-11-07 07:49:45,285 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=11744, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=13063, PETRI_PLACES=485, PETRI_TRANSITIONS=476} [2021-11-07 07:49:45,285 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 419 predicate places. [2021-11-07 07:49:45,286 INFO L470 AbstractCegarLoop]: Abstraction has has 485 places, 476 transitions, 13063 flow [2021-11-07 07:49:45,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:45,287 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:49:45,287 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:45,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:45,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 07:49:45,513 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:49:45,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:45,513 INFO L85 PathProgramCache]: Analyzing trace with hash -321216590, now seen corresponding path program 34 times [2021-11-07 07:49:45,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:45,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528476097] [2021-11-07 07:49:45,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:45,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:45,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:45,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528476097] [2021-11-07 07:49:45,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528476097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:45,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352939517] [2021-11-07 07:49:45,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:49:45,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:45,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:45,687 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:45,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 07:49:46,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:49:46,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:46,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:49:46,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:47,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352939517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:47,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:47,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-07 07:49:47,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179297638] [2021-11-07 07:49:47,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:49:47,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:47,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:49:47,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:49:47,158 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:49:47,159 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 476 transitions, 13063 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:47,159 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:49:47,159 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:49:47,159 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:49:48,992 INFO L129 PetriNetUnfolder]: 387/2892 cut-off events. [2021-11-07 07:49:48,993 INFO L130 PetriNetUnfolder]: For 186928/187298 co-relation queries the response was YES. [2021-11-07 07:49:49,037 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18680 conditions, 2892 events. 387/2892 cut-off events. For 186928/187298 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 26887 event pairs, 0 based on Foata normal form. 136/2721 useless extension candidates. Maximal degree in co-relation 18466. Up to 481 conditions per place. [2021-11-07 07:49:49,056 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 99 selfloop transitions, 360 changer transitions 11/514 dead transitions. [2021-11-07 07:49:49,057 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 514 transitions, 16383 flow [2021-11-07 07:49:49,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 07:49:49,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-07 07:49:49,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2002 transitions. [2021-11-07 07:49:49,059 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8425925925925926 [2021-11-07 07:49:49,059 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2002 transitions. [2021-11-07 07:49:49,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2002 transitions. [2021-11-07 07:49:49,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:49:49,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2002 transitions. [2021-11-07 07:49:49,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.611111111111114) internal successors, (2002), 36 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:49,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:49,067 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:49,067 INFO L186 Difference]: Start difference. First operand has 485 places, 476 transitions, 13063 flow. Second operand 36 states and 2002 transitions. [2021-11-07 07:49:49,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 514 transitions, 16383 flow [2021-11-07 07:49:49,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 514 transitions, 15256 flow, removed 246 selfloop flow, removed 32 redundant places. [2021-11-07 07:49:49,990 INFO L242 Difference]: Finished difference. Result has 491 places, 479 transitions, 13140 flow [2021-11-07 07:49:49,990 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=12172, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=13140, PETRI_PLACES=491, PETRI_TRANSITIONS=479} [2021-11-07 07:49:49,990 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 425 predicate places. [2021-11-07 07:49:49,991 INFO L470 AbstractCegarLoop]: Abstraction has has 491 places, 479 transitions, 13140 flow [2021-11-07 07:49:49,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:49,991 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:49:49,991 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:50,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:50,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:50,192 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:49:50,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:50,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1557152428, now seen corresponding path program 35 times [2021-11-07 07:49:50,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:50,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223251739] [2021-11-07 07:49:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:50,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:50,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:50,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223251739] [2021-11-07 07:49:50,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223251739] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:50,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606708092] [2021-11-07 07:49:50,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:49:50,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:50,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:50,469 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:50,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 07:49:51,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-07 07:49:51,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:51,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:49:51,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:52,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606708092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:52,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:52,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-11-07 07:49:52,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517503595] [2021-11-07 07:49:52,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:49:52,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:52,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:49:52,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:49:52,232 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:49:52,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 479 transitions, 13140 flow. Second operand has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:52,233 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:49:52,233 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:49:52,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:49:53,795 INFO L129 PetriNetUnfolder]: 387/2899 cut-off events. [2021-11-07 07:49:53,795 INFO L130 PetriNetUnfolder]: For 179780/180089 co-relation queries the response was YES. [2021-11-07 07:49:53,845 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18551 conditions, 2899 events. 387/2899 cut-off events. For 179780/180089 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 26936 event pairs, 0 based on Foata normal form. 51/2638 useless extension candidates. Maximal degree in co-relation 18336. Up to 589 conditions per place. [2021-11-07 07:49:53,866 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 386 selfloop transitions, 76 changer transitions 8/514 dead transitions. [2021-11-07 07:49:53,866 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 514 transitions, 15839 flow [2021-11-07 07:49:53,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 07:49:53,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-07 07:49:53,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1276 transitions. [2021-11-07 07:49:53,868 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8405797101449275 [2021-11-07 07:49:53,868 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1276 transitions. [2021-11-07 07:49:53,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1276 transitions. [2021-11-07 07:49:53,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:49:53,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1276 transitions. [2021-11-07 07:49:53,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.47826086956522) internal successors, (1276), 23 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:53,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:53,872 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:53,872 INFO L186 Difference]: Start difference. First operand has 491 places, 479 transitions, 13140 flow. Second operand 23 states and 1276 transitions. [2021-11-07 07:49:53,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 514 transitions, 15839 flow [2021-11-07 07:49:54,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 514 transitions, 14921 flow, removed 81 selfloop flow, removed 35 redundant places. [2021-11-07 07:49:54,595 INFO L242 Difference]: Finished difference. Result has 480 places, 481 transitions, 12552 flow [2021-11-07 07:49:54,596 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=12238, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12552, PETRI_PLACES=480, PETRI_TRANSITIONS=481} [2021-11-07 07:49:54,596 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 414 predicate places. [2021-11-07 07:49:54,596 INFO L470 AbstractCegarLoop]: Abstraction has has 480 places, 481 transitions, 12552 flow [2021-11-07 07:49:54,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:54,597 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:49:54,597 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:54,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:54,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:54,809 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:49:54,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:54,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1699599972, now seen corresponding path program 36 times [2021-11-07 07:49:54,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:54,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353338587] [2021-11-07 07:49:54,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:54,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:55,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:55,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353338587] [2021-11-07 07:49:55,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353338587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:55,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017594814] [2021-11-07 07:49:55,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:49:55,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:55,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:55,136 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:55,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 07:49:56,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-07 07:49:56,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:56,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:49:56,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:56,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017594814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:56,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:56,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-11-07 07:49:56,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178058171] [2021-11-07 07:49:56,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:49:56,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:56,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:49:56,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:49:56,877 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:49:56,878 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 481 transitions, 12552 flow. Second operand has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:56,878 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:49:56,878 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:49:56,878 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:49:58,457 INFO L129 PetriNetUnfolder]: 391/2942 cut-off events. [2021-11-07 07:49:58,458 INFO L130 PetriNetUnfolder]: For 197104/197434 co-relation queries the response was YES. [2021-11-07 07:49:58,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18878 conditions, 2942 events. 391/2942 cut-off events. For 197104/197434 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 27472 event pairs, 0 based on Foata normal form. 69/2696 useless extension candidates. Maximal degree in co-relation 18663. Up to 487 conditions per place. [2021-11-07 07:49:58,647 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 292 selfloop transitions, 172 changer transitions 8/516 dead transitions. [2021-11-07 07:49:58,648 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 516 transitions, 15443 flow [2021-11-07 07:49:58,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 07:49:58,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-07 07:49:58,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1441 transitions. [2021-11-07 07:49:58,651 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8397435897435898 [2021-11-07 07:49:58,651 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1441 transitions. [2021-11-07 07:49:58,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1441 transitions. [2021-11-07 07:49:58,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:49:58,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1441 transitions. [2021-11-07 07:49:58,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.42307692307692) internal successors, (1441), 26 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:58,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:58,659 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:58,659 INFO L186 Difference]: Start difference. First operand has 480 places, 481 transitions, 12552 flow. Second operand 26 states and 1441 transitions. [2021-11-07 07:49:58,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 516 transitions, 15443 flow [2021-11-07 07:49:59,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 516 transitions, 15071 flow, removed 120 selfloop flow, removed 19 redundant places. [2021-11-07 07:49:59,454 INFO L242 Difference]: Finished difference. Result has 490 places, 485 transitions, 12899 flow [2021-11-07 07:49:59,455 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=12296, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=12899, PETRI_PLACES=490, PETRI_TRANSITIONS=485} [2021-11-07 07:49:59,455 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 424 predicate places. [2021-11-07 07:49:59,455 INFO L470 AbstractCegarLoop]: Abstraction has has 490 places, 485 transitions, 12899 flow [2021-11-07 07:49:59,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:59,456 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:49:59,456 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:59,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:59,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-07 07:49:59,661 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:49:59,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:59,664 INFO L85 PathProgramCache]: Analyzing trace with hash 400501900, now seen corresponding path program 37 times [2021-11-07 07:49:59,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:59,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80053933] [2021-11-07 07:49:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:59,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:59,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:59,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80053933] [2021-11-07 07:49:59,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80053933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:59,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161155234] [2021-11-07 07:49:59,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:49:59,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:59,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:59,940 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:59,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 07:50:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:01,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:50:01,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:01,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161155234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:01,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:01,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-11-07 07:50:01,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144466484] [2021-11-07 07:50:01,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:50:01,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:01,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:50:01,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:50:01,854 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:50:01,855 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 485 transitions, 12899 flow. Second operand has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:01,855 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:50:01,855 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:50:01,855 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:50:03,508 INFO L129 PetriNetUnfolder]: 395/2978 cut-off events. [2021-11-07 07:50:03,508 INFO L130 PetriNetUnfolder]: For 197926/198251 co-relation queries the response was YES. [2021-11-07 07:50:03,565 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19171 conditions, 2978 events. 395/2978 cut-off events. For 197926/198251 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 27705 event pairs, 0 based on Foata normal form. 88/2747 useless extension candidates. Maximal degree in co-relation 18952. Up to 495 conditions per place. [2021-11-07 07:50:03,587 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 218 selfloop transitions, 248 changer transitions 8/518 dead transitions. [2021-11-07 07:50:03,587 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 518 transitions, 15834 flow [2021-11-07 07:50:03,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 07:50:03,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-07 07:50:03,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1553 transitions. [2021-11-07 07:50:03,589 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8403679653679653 [2021-11-07 07:50:03,589 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1553 transitions. [2021-11-07 07:50:03,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1553 transitions. [2021-11-07 07:50:03,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:50:03,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1553 transitions. [2021-11-07 07:50:03,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.464285714285715) internal successors, (1553), 28 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:03,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:03,595 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:03,595 INFO L186 Difference]: Start difference. First operand has 490 places, 485 transitions, 12899 flow. Second operand 28 states and 1553 transitions. [2021-11-07 07:50:03,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 518 transitions, 15834 flow [2021-11-07 07:50:04,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 518 transitions, 15320 flow, removed 108 selfloop flow, removed 21 redundant places. [2021-11-07 07:50:04,405 INFO L242 Difference]: Finished difference. Result has 498 places, 489 transitions, 13238 flow [2021-11-07 07:50:04,406 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=12485, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=13238, PETRI_PLACES=498, PETRI_TRANSITIONS=489} [2021-11-07 07:50:04,406 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 432 predicate places. [2021-11-07 07:50:04,406 INFO L470 AbstractCegarLoop]: Abstraction has has 498 places, 489 transitions, 13238 flow [2021-11-07 07:50:04,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:04,407 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:50:04,407 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:04,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:04,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-07 07:50:04,607 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:50:04,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:04,608 INFO L85 PathProgramCache]: Analyzing trace with hash -609053868, now seen corresponding path program 38 times [2021-11-07 07:50:04,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:04,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153930990] [2021-11-07 07:50:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:04,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:04,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:04,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153930990] [2021-11-07 07:50:04,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153930990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:04,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624541150] [2021-11-07 07:50:04,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:50:04,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:04,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:04,919 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:04,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 07:50:06,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:50:06,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:06,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:50:06,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:06,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624541150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:06,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:06,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-07 07:50:06,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520950110] [2021-11-07 07:50:06,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 07:50:06,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:06,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 07:50:06,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:50:06,705 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:50:06,706 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 489 transitions, 13238 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:06,706 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:50:06,706 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:50:06,706 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:50:08,412 INFO L129 PetriNetUnfolder]: 397/3003 cut-off events. [2021-11-07 07:50:08,412 INFO L130 PetriNetUnfolder]: For 199253/199550 co-relation queries the response was YES. [2021-11-07 07:50:08,593 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19405 conditions, 3003 events. 397/3003 cut-off events. For 199253/199550 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 27982 event pairs, 0 based on Foata normal form. 98/2779 useless extension candidates. Maximal degree in co-relation 19184. Up to 499 conditions per place. [2021-11-07 07:50:08,617 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 189 selfloop transitions, 280 changer transitions 8/521 dead transitions. [2021-11-07 07:50:08,618 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 521 transitions, 16190 flow [2021-11-07 07:50:08,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 07:50:08,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-07 07:50:08,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1720 transitions. [2021-11-07 07:50:08,620 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8406647116324536 [2021-11-07 07:50:08,621 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1720 transitions. [2021-11-07 07:50:08,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1720 transitions. [2021-11-07 07:50:08,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:50:08,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1720 transitions. [2021-11-07 07:50:08,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.483870967741936) internal successors, (1720), 31 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:08,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:08,628 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:08,629 INFO L186 Difference]: Start difference. First operand has 498 places, 489 transitions, 13238 flow. Second operand 31 states and 1720 transitions. [2021-11-07 07:50:08,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 521 transitions, 16190 flow [2021-11-07 07:50:09,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 521 transitions, 15572 flow, removed 112 selfloop flow, removed 22 redundant places. [2021-11-07 07:50:09,656 INFO L242 Difference]: Finished difference. Result has 508 places, 491 transitions, 13474 flow [2021-11-07 07:50:09,657 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=12724, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=13474, PETRI_PLACES=508, PETRI_TRANSITIONS=491} [2021-11-07 07:50:09,658 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 442 predicate places. [2021-11-07 07:50:09,658 INFO L470 AbstractCegarLoop]: Abstraction has has 508 places, 491 transitions, 13474 flow [2021-11-07 07:50:09,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:09,658 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:50:09,658 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:09,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-07 07:50:09,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-07 07:50:09,859 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:50:09,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:09,860 INFO L85 PathProgramCache]: Analyzing trace with hash -554055468, now seen corresponding path program 39 times [2021-11-07 07:50:09,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:09,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153241484] [2021-11-07 07:50:09,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:09,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:10,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:10,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153241484] [2021-11-07 07:50:10,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153241484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:10,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391386945] [2021-11-07 07:50:10,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:50:10,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:10,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:10,150 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:10,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 07:50:11,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-07 07:50:11,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:11,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:50:11,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:12,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391386945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:12,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:12,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-07 07:50:12,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943470916] [2021-11-07 07:50:12,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 07:50:12,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:12,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 07:50:12,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:50:12,234 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:50:12,235 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 491 transitions, 13474 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:12,235 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:50:12,235 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:50:12,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:50:14,021 INFO L129 PetriNetUnfolder]: 402/3041 cut-off events. [2021-11-07 07:50:14,021 INFO L130 PetriNetUnfolder]: For 203263/203564 co-relation queries the response was YES. [2021-11-07 07:50:14,078 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19779 conditions, 3041 events. 402/3041 cut-off events. For 203263/203564 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 28473 event pairs, 0 based on Foata normal form. 124/2840 useless extension candidates. Maximal degree in co-relation 19556. Up to 509 conditions per place. [2021-11-07 07:50:14,099 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 113 selfloop transitions, 364 changer transitions 8/529 dead transitions. [2021-11-07 07:50:14,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 529 transitions, 16843 flow [2021-11-07 07:50:14,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 07:50:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-07 07:50:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1944 transitions. [2021-11-07 07:50:14,102 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8415584415584415 [2021-11-07 07:50:14,102 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1944 transitions. [2021-11-07 07:50:14,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1944 transitions. [2021-11-07 07:50:14,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:50:14,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1944 transitions. [2021-11-07 07:50:14,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.542857142857144) internal successors, (1944), 35 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:14,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:14,106 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:14,106 INFO L186 Difference]: Start difference. First operand has 508 places, 491 transitions, 13474 flow. Second operand 35 states and 1944 transitions. [2021-11-07 07:50:14,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 529 transitions, 16843 flow [2021-11-07 07:50:15,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 529 transitions, 16081 flow, removed 120 selfloop flow, removed 28 redundant places. [2021-11-07 07:50:15,047 INFO L242 Difference]: Finished difference. Result has 519 places, 497 transitions, 13995 flow [2021-11-07 07:50:15,048 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=12836, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=13995, PETRI_PLACES=519, PETRI_TRANSITIONS=497} [2021-11-07 07:50:15,048 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 453 predicate places. [2021-11-07 07:50:15,048 INFO L470 AbstractCegarLoop]: Abstraction has has 519 places, 497 transitions, 13995 flow [2021-11-07 07:50:15,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:15,048 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:50:15,048 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:15,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:15,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-07 07:50:15,249 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:50:15,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:15,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1725985080, now seen corresponding path program 40 times [2021-11-07 07:50:15,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:15,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119278195] [2021-11-07 07:50:15,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:15,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:15,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:15,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119278195] [2021-11-07 07:50:15,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119278195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:15,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741611193] [2021-11-07 07:50:15,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:50:15,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:15,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:15,495 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:15,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 07:50:17,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:50:17,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:17,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:50:17,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:17,425 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 4 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:17,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741611193] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:17,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:17,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-07 07:50:17,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210280908] [2021-11-07 07:50:17,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 07:50:17,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:17,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 07:50:17,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:50:17,428 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:50:17,430 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 497 transitions, 13995 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:17,430 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:50:17,430 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:50:17,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:50:19,893 INFO L129 PetriNetUnfolder]: 408/3088 cut-off events. [2021-11-07 07:50:19,893 INFO L130 PetriNetUnfolder]: For 216934/217245 co-relation queries the response was YES. [2021-11-07 07:50:19,959 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20469 conditions, 3088 events. 408/3088 cut-off events. For 216934/217245 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 28880 event pairs, 0 based on Foata normal form. 135/2894 useless extension candidates. Maximal degree in co-relation 20241. Up to 521 conditions per place. [2021-11-07 07:50:19,982 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 93 selfloop transitions, 393 changer transitions 8/538 dead transitions. [2021-11-07 07:50:19,983 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 538 transitions, 17606 flow [2021-11-07 07:50:19,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-07 07:50:19,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-07 07:50:19,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2056 transitions. [2021-11-07 07:50:19,985 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8419328419328419 [2021-11-07 07:50:19,985 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2056 transitions. [2021-11-07 07:50:19,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2056 transitions. [2021-11-07 07:50:19,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:50:19,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2056 transitions. [2021-11-07 07:50:19,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.567567567567565) internal successors, (2056), 37 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:19,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 66.0) internal successors, (2508), 38 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:19,989 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 66.0) internal successors, (2508), 38 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:19,989 INFO L186 Difference]: Start difference. First operand has 519 places, 497 transitions, 13995 flow. Second operand 37 states and 2056 transitions. [2021-11-07 07:50:19,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 538 transitions, 17606 flow [2021-11-07 07:50:21,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 538 transitions, 16763 flow, removed 145 selfloop flow, removed 29 redundant places. [2021-11-07 07:50:21,104 INFO L242 Difference]: Finished difference. Result has 529 places, 505 transitions, 14455 flow [2021-11-07 07:50:21,105 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=13240, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=14455, PETRI_PLACES=529, PETRI_TRANSITIONS=505} [2021-11-07 07:50:21,105 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 463 predicate places. [2021-11-07 07:50:21,105 INFO L470 AbstractCegarLoop]: Abstraction has has 529 places, 505 transitions, 14455 flow [2021-11-07 07:50:21,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:21,106 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:50:21,106 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:21,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:21,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-07 07:50:21,307 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:50:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:21,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1325819492, now seen corresponding path program 41 times [2021-11-07 07:50:21,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:21,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210956483] [2021-11-07 07:50:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:21,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:21,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:21,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210956483] [2021-11-07 07:50:21,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210956483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:21,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158043466] [2021-11-07 07:50:21,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:50:21,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:21,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:21,521 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:21,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-07 07:50:22,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-07 07:50:22,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:22,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:50:22,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:23,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158043466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:23,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:23,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-11-07 07:50:23,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050826931] [2021-11-07 07:50:23,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:50:23,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:23,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:50:23,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:50:23,250 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:50:23,251 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 505 transitions, 14455 flow. Second operand has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:23,251 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:50:23,251 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:50:23,251 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:50:25,289 INFO L129 PetriNetUnfolder]: 423/3176 cut-off events. [2021-11-07 07:50:25,289 INFO L130 PetriNetUnfolder]: For 242567/242890 co-relation queries the response was YES. [2021-11-07 07:50:25,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21792 conditions, 3176 events. 423/3176 cut-off events. For 242567/242890 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 29697 event pairs, 0 based on Foata normal form. 140/2979 useless extension candidates. Maximal degree in co-relation 21561. Up to 539 conditions per place. [2021-11-07 07:50:25,378 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 96 selfloop transitions, 401 changer transitions 8/549 dead transitions. [2021-11-07 07:50:25,378 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 549 transitions, 18408 flow [2021-11-07 07:50:25,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 07:50:25,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-07 07:50:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2005 transitions. [2021-11-07 07:50:25,381 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8438552188552189 [2021-11-07 07:50:25,381 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2005 transitions. [2021-11-07 07:50:25,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2005 transitions. [2021-11-07 07:50:25,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:50:25,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2005 transitions. [2021-11-07 07:50:25,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.69444444444444) internal successors, (2005), 36 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:25,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:25,389 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:25,389 INFO L186 Difference]: Start difference. First operand has 529 places, 505 transitions, 14455 flow. Second operand 36 states and 2005 transitions. [2021-11-07 07:50:25,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 549 transitions, 18408 flow [2021-11-07 07:50:26,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 549 transitions, 17289 flow, removed 202 selfloop flow, removed 33 redundant places. [2021-11-07 07:50:26,342 INFO L242 Difference]: Finished difference. Result has 535 places, 511 transitions, 14809 flow [2021-11-07 07:50:26,343 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=13502, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=14809, PETRI_PLACES=535, PETRI_TRANSITIONS=511} [2021-11-07 07:50:26,343 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 469 predicate places. [2021-11-07 07:50:26,343 INFO L470 AbstractCegarLoop]: Abstraction has has 535 places, 511 transitions, 14809 flow [2021-11-07 07:50:26,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.05263157894737) internal successors, (1027), 19 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:26,344 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:50:26,344 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:26,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:26,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-07 07:50:26,569 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:50:26,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:26,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1099052608, now seen corresponding path program 42 times [2021-11-07 07:50:26,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:26,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376404100] [2021-11-07 07:50:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:26,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:26,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:26,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376404100] [2021-11-07 07:50:26,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376404100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:26,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335904529] [2021-11-07 07:50:26,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:50:26,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:26,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:26,939 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:26,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 07:50:28,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-07 07:50:28,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:28,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:50:28,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:29,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335904529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:29,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:29,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-11-07 07:50:29,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958695407] [2021-11-07 07:50:29,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:50:29,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:29,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:50:29,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:50:29,312 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:50:29,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 511 transitions, 14809 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:29,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:50:29,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:50:29,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:50:31,721 INFO L129 PetriNetUnfolder]: 429/3195 cut-off events. [2021-11-07 07:50:31,721 INFO L130 PetriNetUnfolder]: For 266431/266853 co-relation queries the response was YES. [2021-11-07 07:50:31,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22618 conditions, 3195 events. 429/3195 cut-off events. For 266431/266853 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 29830 event pairs, 0 based on Foata normal form. 152/3007 useless extension candidates. Maximal degree in co-relation 22383. Up to 547 conditions per place. [2021-11-07 07:50:31,814 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 93 selfloop transitions, 413 changer transitions 17/567 dead transitions. [2021-11-07 07:50:31,814 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 567 transitions, 19698 flow [2021-11-07 07:50:31,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 07:50:31,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-07 07:50:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2337 transitions. [2021-11-07 07:50:31,817 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8430735930735931 [2021-11-07 07:50:31,817 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2337 transitions. [2021-11-07 07:50:31,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2337 transitions. [2021-11-07 07:50:31,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:50:31,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2337 transitions. [2021-11-07 07:50:31,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.642857142857146) internal successors, (2337), 42 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:31,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 66.0) internal successors, (2838), 43 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:31,823 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 66.0) internal successors, (2838), 43 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:31,823 INFO L186 Difference]: Start difference. First operand has 535 places, 511 transitions, 14809 flow. Second operand 42 states and 2337 transitions. [2021-11-07 07:50:31,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 567 transitions, 19698 flow [2021-11-07 07:50:32,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 567 transitions, 18397 flow, removed 294 selfloop flow, removed 31 redundant places. [2021-11-07 07:50:32,882 INFO L242 Difference]: Finished difference. Result has 552 places, 523 transitions, 15333 flow [2021-11-07 07:50:32,882 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=13818, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=15333, PETRI_PLACES=552, PETRI_TRANSITIONS=523} [2021-11-07 07:50:32,883 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 486 predicate places. [2021-11-07 07:50:32,883 INFO L470 AbstractCegarLoop]: Abstraction has has 552 places, 523 transitions, 15333 flow [2021-11-07 07:50:32,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:32,883 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:50:32,884 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:32,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-07 07:50:33,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:33,084 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:50:33,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:33,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1647212655, now seen corresponding path program 43 times [2021-11-07 07:50:33,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:33,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809998473] [2021-11-07 07:50:33,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:33,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:33,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:33,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809998473] [2021-11-07 07:50:33,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809998473] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:33,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611242202] [2021-11-07 07:50:33,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:50:33,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:33,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:33,488 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:33,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 07:50:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:35,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:50:35,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:35,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611242202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:35,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:35,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-07 07:50:35,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915057927] [2021-11-07 07:50:35,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:50:35,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:35,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:50:35,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:50:35,552 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:50:35,553 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 523 transitions, 15333 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:35,553 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:50:35,553 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:50:35,553 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:50:37,340 INFO L129 PetriNetUnfolder]: 425/3189 cut-off events. [2021-11-07 07:50:37,340 INFO L130 PetriNetUnfolder]: For 288018/288413 co-relation queries the response was YES. [2021-11-07 07:50:37,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23013 conditions, 3189 events. 425/3189 cut-off events. For 288018/288413 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 29717 event pairs, 0 based on Foata normal form. 57/2905 useless extension candidates. Maximal degree in co-relation 22771. Up to 743 conditions per place. [2021-11-07 07:50:37,426 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 469 selfloop transitions, 33 changer transitions 8/554 dead transitions. [2021-11-07 07:50:37,426 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 554 transitions, 18324 flow [2021-11-07 07:50:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 07:50:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-07 07:50:37,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1275 transitions. [2021-11-07 07:50:37,437 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8399209486166008 [2021-11-07 07:50:37,437 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1275 transitions. [2021-11-07 07:50:37,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1275 transitions. [2021-11-07 07:50:37,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:50:37,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1275 transitions. [2021-11-07 07:50:37,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.43478260869565) internal successors, (1275), 23 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:37,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:37,440 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:37,440 INFO L186 Difference]: Start difference. First operand has 552 places, 523 transitions, 15333 flow. Second operand 23 states and 1275 transitions. [2021-11-07 07:50:37,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 554 transitions, 18324 flow [2021-11-07 07:50:38,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 554 transitions, 16934 flow, removed 289 selfloop flow, removed 37 redundant places. [2021-11-07 07:50:38,536 INFO L242 Difference]: Finished difference. Result has 537 places, 525 transitions, 14263 flow [2021-11-07 07:50:38,537 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14015, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=14263, PETRI_PLACES=537, PETRI_TRANSITIONS=525} [2021-11-07 07:50:38,537 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 471 predicate places. [2021-11-07 07:50:38,538 INFO L470 AbstractCegarLoop]: Abstraction has has 537 places, 525 transitions, 14263 flow [2021-11-07 07:50:38,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:38,538 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:50:38,538 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:38,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-07 07:50:38,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-07 07:50:38,739 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:50:38,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:38,739 INFO L85 PathProgramCache]: Analyzing trace with hash -942632505, now seen corresponding path program 44 times [2021-11-07 07:50:38,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:38,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451119202] [2021-11-07 07:50:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:38,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:39,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:39,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451119202] [2021-11-07 07:50:39,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451119202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:39,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937988377] [2021-11-07 07:50:39,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:50:39,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:39,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:39,012 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:39,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-07 07:50:40,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:50:40,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:40,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:50:40,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:41,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937988377] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:41,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:41,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-07 07:50:41,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387358786] [2021-11-07 07:50:41,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:50:41,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:41,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:50:41,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:50:41,236 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:50:41,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 525 transitions, 14263 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:41,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:50:41,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:50:41,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:50:42,697 INFO L129 PetriNetUnfolder]: 427/3207 cut-off events. [2021-11-07 07:50:42,698 INFO L130 PetriNetUnfolder]: For 290093/290448 co-relation queries the response was YES. [2021-11-07 07:50:42,929 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22619 conditions, 3207 events. 427/3207 cut-off events. For 290093/290448 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 29906 event pairs, 0 based on Foata normal form. 65/2929 useless extension candidates. Maximal degree in co-relation 22377. Up to 651 conditions per place. [2021-11-07 07:50:42,962 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 419 selfloop transitions, 86 changer transitions 8/557 dead transitions. [2021-11-07 07:50:42,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 557 transitions, 17369 flow [2021-11-07 07:50:42,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 07:50:42,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-07 07:50:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1498 transitions. [2021-11-07 07:50:42,964 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8406285072951739 [2021-11-07 07:50:42,964 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1498 transitions. [2021-11-07 07:50:42,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1498 transitions. [2021-11-07 07:50:42,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:50:42,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1498 transitions. [2021-11-07 07:50:42,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.48148148148148) internal successors, (1498), 27 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:42,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:42,969 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:42,969 INFO L186 Difference]: Start difference. First operand has 537 places, 525 transitions, 14263 flow. Second operand 27 states and 1498 transitions. [2021-11-07 07:50:42,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 557 transitions, 17369 flow [2021-11-07 07:50:43,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 557 transitions, 17055 flow, removed 126 selfloop flow, removed 20 redundant places. [2021-11-07 07:50:43,972 INFO L242 Difference]: Finished difference. Result has 545 places, 527 transitions, 14417 flow [2021-11-07 07:50:43,973 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14061, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14417, PETRI_PLACES=545, PETRI_TRANSITIONS=527} [2021-11-07 07:50:43,973 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 479 predicate places. [2021-11-07 07:50:43,973 INFO L470 AbstractCegarLoop]: Abstraction has has 545 places, 527 transitions, 14417 flow [2021-11-07 07:50:43,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:43,973 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:50:43,974 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:43,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-07 07:50:44,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:44,174 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:50:44,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:44,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1835489349, now seen corresponding path program 45 times [2021-11-07 07:50:44,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:44,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961092484] [2021-11-07 07:50:44,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:44,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:44,412 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:44,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:44,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961092484] [2021-11-07 07:50:44,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961092484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:44,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189568059] [2021-11-07 07:50:44,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:50:44,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:44,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:44,414 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:44,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 07:50:46,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-07 07:50:46,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:46,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:50:46,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:46,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189568059] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:46,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:46,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-11-07 07:50:46,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952117619] [2021-11-07 07:50:46,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:50:46,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:46,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:50:46,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:50:46,598 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:50:46,599 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 527 transitions, 14417 flow. Second operand has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:46,599 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:50:46,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:50:46,600 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:50:48,443 INFO L129 PetriNetUnfolder]: 429/3225 cut-off events. [2021-11-07 07:50:48,443 INFO L130 PetriNetUnfolder]: For 289263/289613 co-relation queries the response was YES. [2021-11-07 07:50:48,549 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22721 conditions, 3225 events. 429/3225 cut-off events. For 289263/289613 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 30084 event pairs, 0 based on Foata normal form. 80/2960 useless extension candidates. Maximal degree in co-relation 22477. Up to 541 conditions per place. [2021-11-07 07:50:48,582 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 300 selfloop transitions, 212 changer transitions 8/564 dead transitions. [2021-11-07 07:50:48,582 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 564 transitions, 17739 flow [2021-11-07 07:50:48,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 07:50:48,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-07 07:50:48,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1719 transitions. [2021-11-07 07:50:48,585 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8401759530791789 [2021-11-07 07:50:48,585 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1719 transitions. [2021-11-07 07:50:48,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1719 transitions. [2021-11-07 07:50:48,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:50:48,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1719 transitions. [2021-11-07 07:50:48,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.45161290322581) internal successors, (1719), 31 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:48,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:48,590 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:48,590 INFO L186 Difference]: Start difference. First operand has 545 places, 527 transitions, 14417 flow. Second operand 31 states and 1719 transitions. [2021-11-07 07:50:48,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 564 transitions, 17739 flow [2021-11-07 07:50:49,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 564 transitions, 17347 flow, removed 114 selfloop flow, removed 24 redundant places. [2021-11-07 07:50:49,807 INFO L242 Difference]: Finished difference. Result has 553 places, 529 transitions, 14748 flow [2021-11-07 07:50:49,808 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14125, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=14748, PETRI_PLACES=553, PETRI_TRANSITIONS=529} [2021-11-07 07:50:49,808 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 487 predicate places. [2021-11-07 07:50:49,808 INFO L470 AbstractCegarLoop]: Abstraction has has 553 places, 529 transitions, 14748 flow [2021-11-07 07:50:49,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:49,809 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:50:49,809 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:49,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:50,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:50,022 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:50:50,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:50,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1645461613, now seen corresponding path program 46 times [2021-11-07 07:50:50,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:50,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116870488] [2021-11-07 07:50:50,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:50,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:50,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:50,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116870488] [2021-11-07 07:50:50,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116870488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:50,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291245916] [2021-11-07 07:50:50,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:50:50,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:50,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:50,220 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:50,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-07 07:50:51,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:50:51,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:51,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:50:51,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:52,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291245916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:52,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:52,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-07 07:50:52,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764813392] [2021-11-07 07:50:52,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:50:52,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:52,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:50:52,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:50:52,256 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:50:52,257 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 529 transitions, 14748 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:52,257 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:50:52,257 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:50:52,257 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:50:54,301 INFO L129 PetriNetUnfolder]: 431/3243 cut-off events. [2021-11-07 07:50:54,301 INFO L130 PetriNetUnfolder]: For 291870/292220 co-relation queries the response was YES. [2021-11-07 07:50:54,371 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22988 conditions, 3243 events. 431/3243 cut-off events. For 291870/292220 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 30244 event pairs, 0 based on Foata normal form. 112/3008 useless extension candidates. Maximal degree in co-relation 22741. Up to 545 conditions per place. [2021-11-07 07:50:54,413 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 199 selfloop transitions, 310 changer transitions 8/561 dead transitions. [2021-11-07 07:50:54,413 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 561 transitions, 18163 flow [2021-11-07 07:50:54,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 07:50:54,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-07 07:50:54,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1887 transitions. [2021-11-07 07:50:54,417 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-11-07 07:50:54,417 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1887 transitions. [2021-11-07 07:50:54,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1887 transitions. [2021-11-07 07:50:54,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:50:54,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1887 transitions. [2021-11-07 07:50:54,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.5) internal successors, (1887), 34 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:54,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:54,424 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:54,424 INFO L186 Difference]: Start difference. First operand has 553 places, 529 transitions, 14748 flow. Second operand 34 states and 1887 transitions. [2021-11-07 07:50:54,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 561 transitions, 18163 flow [2021-11-07 07:50:55,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 561 transitions, 17551 flow, removed 122 selfloop flow, removed 27 redundant places. [2021-11-07 07:50:55,651 INFO L242 Difference]: Finished difference. Result has 561 places, 531 transitions, 15075 flow [2021-11-07 07:50:55,651 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14244, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=15075, PETRI_PLACES=561, PETRI_TRANSITIONS=531} [2021-11-07 07:50:55,652 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 495 predicate places. [2021-11-07 07:50:55,652 INFO L470 AbstractCegarLoop]: Abstraction has has 561 places, 531 transitions, 15075 flow [2021-11-07 07:50:55,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:55,652 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:50:55,652 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:55,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:55,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-07 07:50:55,853 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:50:55,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:55,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1873939515, now seen corresponding path program 47 times [2021-11-07 07:50:55,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:55,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957737868] [2021-11-07 07:50:55,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:55,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:56,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:56,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957737868] [2021-11-07 07:50:56,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957737868] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:56,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491001515] [2021-11-07 07:50:56,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:50:56,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:56,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:56,270 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:56,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-07 07:50:58,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-07 07:50:58,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:58,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:50:58,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:58,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491001515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:58,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:58,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-11-07 07:50:58,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013642023] [2021-11-07 07:50:58,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:50:58,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:58,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:50:58,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:50:58,720 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:50:58,721 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 531 transitions, 15075 flow. Second operand has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:58,721 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:50:58,721 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:50:58,721 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:51:00,669 INFO L129 PetriNetUnfolder]: 433/3254 cut-off events. [2021-11-07 07:51:00,669 INFO L130 PetriNetUnfolder]: For 292845/293227 co-relation queries the response was YES. [2021-11-07 07:51:00,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23248 conditions, 3254 events. 433/3254 cut-off events. For 292845/293227 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 30374 event pairs, 0 based on Foata normal form. 117/3023 useless extension candidates. Maximal degree in co-relation 22999. Up to 549 conditions per place. [2021-11-07 07:51:00,751 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 180 selfloop transitions, 332 changer transitions 8/564 dead transitions. [2021-11-07 07:51:00,751 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 564 transitions, 18592 flow [2021-11-07 07:51:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 07:51:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-07 07:51:00,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1943 transitions. [2021-11-07 07:51:00,753 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8411255411255412 [2021-11-07 07:51:00,753 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1943 transitions. [2021-11-07 07:51:00,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1943 transitions. [2021-11-07 07:51:00,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:51:00,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1943 transitions. [2021-11-07 07:51:00,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.51428571428571) internal successors, (1943), 35 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:00,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:00,756 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:00,756 INFO L186 Difference]: Start difference. First operand has 561 places, 531 transitions, 15075 flow. Second operand 35 states and 1943 transitions. [2021-11-07 07:51:00,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 564 transitions, 18592 flow [2021-11-07 07:51:01,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 564 transitions, 17726 flow, removed 124 selfloop flow, removed 32 redundant places. [2021-11-07 07:51:01,911 INFO L242 Difference]: Finished difference. Result has 565 places, 533 transitions, 15204 flow [2021-11-07 07:51:01,912 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14321, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=15204, PETRI_PLACES=565, PETRI_TRANSITIONS=533} [2021-11-07 07:51:01,912 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 499 predicate places. [2021-11-07 07:51:01,912 INFO L470 AbstractCegarLoop]: Abstraction has has 565 places, 533 transitions, 15204 flow [2021-11-07 07:51:01,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:01,913 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:51:01,913 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:01,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-11-07 07:51:02,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:02,113 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:51:02,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:02,114 INFO L85 PathProgramCache]: Analyzing trace with hash -993388705, now seen corresponding path program 48 times [2021-11-07 07:51:02,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:02,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531184114] [2021-11-07 07:51:02,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:02,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:02,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:02,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531184114] [2021-11-07 07:51:02,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531184114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:02,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036267708] [2021-11-07 07:51:02,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:51:02,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:02,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:02,316 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:02,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-07 07:51:04,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-07 07:51:04,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:04,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:51:04,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:04,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036267708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:04,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:04,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-07 07:51:04,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358747475] [2021-11-07 07:51:04,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:51:04,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:04,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:51:04,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:51:04,692 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:51:04,693 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 533 transitions, 15204 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:04,693 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:51:04,693 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:51:04,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:51:06,654 INFO L129 PetriNetUnfolder]: 437/3297 cut-off events. [2021-11-07 07:51:06,654 INFO L130 PetriNetUnfolder]: For 296612/296962 co-relation queries the response was YES. [2021-11-07 07:51:06,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23552 conditions, 3297 events. 437/3297 cut-off events. For 296612/296962 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 30885 event pairs, 0 based on Foata normal form. 126/3070 useless extension candidates. Maximal degree in co-relation 23301. Up to 557 conditions per place. [2021-11-07 07:51:06,735 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 160 selfloop transitions, 356 changer transitions 8/568 dead transitions. [2021-11-07 07:51:06,735 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 568 transitions, 18848 flow [2021-11-07 07:51:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 07:51:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-07 07:51:06,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1999 transitions. [2021-11-07 07:51:06,736 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8413299663299664 [2021-11-07 07:51:06,736 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1999 transitions. [2021-11-07 07:51:06,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1999 transitions. [2021-11-07 07:51:06,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:51:06,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1999 transitions. [2021-11-07 07:51:06,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.52777777777778) internal successors, (1999), 36 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:06,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:06,740 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:06,740 INFO L186 Difference]: Start difference. First operand has 565 places, 533 transitions, 15204 flow. Second operand 36 states and 1999 transitions. [2021-11-07 07:51:06,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 568 transitions, 18848 flow [2021-11-07 07:51:07,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 568 transitions, 17981 flow, removed 123 selfloop flow, removed 32 redundant places. [2021-11-07 07:51:07,870 INFO L242 Difference]: Finished difference. Result has 570 places, 537 transitions, 15454 flow [2021-11-07 07:51:07,870 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14453, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=15454, PETRI_PLACES=570, PETRI_TRANSITIONS=537} [2021-11-07 07:51:07,871 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 504 predicate places. [2021-11-07 07:51:07,871 INFO L470 AbstractCegarLoop]: Abstraction has has 570 places, 537 transitions, 15454 flow [2021-11-07 07:51:07,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:07,871 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:51:07,871 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:07,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:08,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-07 07:51:08,072 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:51:08,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:08,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1291318595, now seen corresponding path program 49 times [2021-11-07 07:51:08,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:08,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33529582] [2021-11-07 07:51:08,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:08,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:08,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:08,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33529582] [2021-11-07 07:51:08,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33529582] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:08,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977300909] [2021-11-07 07:51:08,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:51:08,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:08,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:08,297 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:08,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-07 07:51:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:10,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:51:10,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:10,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977300909] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:10,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:10,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-07 07:51:10,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302880086] [2021-11-07 07:51:10,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:51:10,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:10,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:51:10,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:51:10,405 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:51:10,406 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 537 transitions, 15454 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:10,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:51:10,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:51:10,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:51:12,404 INFO L129 PetriNetUnfolder]: 441/3326 cut-off events. [2021-11-07 07:51:12,404 INFO L130 PetriNetUnfolder]: For 300617/300999 co-relation queries the response was YES. [2021-11-07 07:51:12,466 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23876 conditions, 3326 events. 441/3326 cut-off events. For 300617/300999 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 31223 event pairs, 0 based on Foata normal form. 141/3112 useless extension candidates. Maximal degree in co-relation 23623. Up to 565 conditions per place. [2021-11-07 07:51:12,488 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 134 selfloop transitions, 389 changer transitions 8/575 dead transitions. [2021-11-07 07:51:12,489 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 575 transitions, 19289 flow [2021-11-07 07:51:12,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 07:51:12,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-07 07:51:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2111 transitions. [2021-11-07 07:51:12,499 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8417065390749602 [2021-11-07 07:51:12,499 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2111 transitions. [2021-11-07 07:51:12,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2111 transitions. [2021-11-07 07:51:12,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:51:12,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2111 transitions. [2021-11-07 07:51:12,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.55263157894737) internal successors, (2111), 38 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:12,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:12,504 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:12,504 INFO L186 Difference]: Start difference. First operand has 570 places, 537 transitions, 15454 flow. Second operand 38 states and 2111 transitions. [2021-11-07 07:51:12,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 575 transitions, 19289 flow [2021-11-07 07:51:13,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 575 transitions, 18374 flow, removed 127 selfloop flow, removed 33 redundant places. [2021-11-07 07:51:13,858 INFO L242 Difference]: Finished difference. Result has 576 places, 541 transitions, 15743 flow [2021-11-07 07:51:13,858 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14663, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=15743, PETRI_PLACES=576, PETRI_TRANSITIONS=541} [2021-11-07 07:51:13,858 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 510 predicate places. [2021-11-07 07:51:13,859 INFO L470 AbstractCegarLoop]: Abstraction has has 576 places, 541 transitions, 15743 flow [2021-11-07 07:51:13,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:13,859 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:51:13,859 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:13,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:14,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:14,061 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:51:14,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:14,061 INFO L85 PathProgramCache]: Analyzing trace with hash -525280337, now seen corresponding path program 50 times [2021-11-07 07:51:14,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:14,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502902528] [2021-11-07 07:51:14,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:14,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:14,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:14,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502902528] [2021-11-07 07:51:14,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502902528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:14,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514436721] [2021-11-07 07:51:14,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:51:14,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:14,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:14,279 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:14,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-07 07:51:16,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:51:16,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:16,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:51:16,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:16,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514436721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:16,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:16,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-11-07 07:51:16,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762881100] [2021-11-07 07:51:16,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:51:16,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:16,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:51:16,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:51:16,473 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:51:16,474 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 541 transitions, 15743 flow. Second operand has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:16,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:51:16,474 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:51:16,474 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:51:18,507 INFO L129 PetriNetUnfolder]: 444/3360 cut-off events. [2021-11-07 07:51:18,507 INFO L130 PetriNetUnfolder]: For 304610/304960 co-relation queries the response was YES. [2021-11-07 07:51:18,573 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24167 conditions, 3360 events. 444/3360 cut-off events. For 304610/304960 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 31566 event pairs, 0 based on Foata normal form. 146/3148 useless extension candidates. Maximal degree in co-relation 23912. Up to 571 conditions per place. [2021-11-07 07:51:18,595 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 123 selfloop transitions, 407 changer transitions 8/582 dead transitions. [2021-11-07 07:51:18,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 582 transitions, 19755 flow [2021-11-07 07:51:18,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 07:51:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-07 07:51:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2167 transitions. [2021-11-07 07:51:18,597 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8418803418803419 [2021-11-07 07:51:18,598 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2167 transitions. [2021-11-07 07:51:18,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2167 transitions. [2021-11-07 07:51:18,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:51:18,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2167 transitions. [2021-11-07 07:51:18,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.56410256410256) internal successors, (2167), 39 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:18,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:18,601 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:18,601 INFO L186 Difference]: Start difference. First operand has 576 places, 541 transitions, 15743 flow. Second operand 39 states and 2167 transitions. [2021-11-07 07:51:18,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 582 transitions, 19755 flow [2021-11-07 07:51:19,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 582 transitions, 18747 flow, removed 133 selfloop flow, removed 36 redundant places. [2021-11-07 07:51:19,849 INFO L242 Difference]: Finished difference. Result has 581 places, 546 transitions, 16060 flow [2021-11-07 07:51:19,850 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14867, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=16060, PETRI_PLACES=581, PETRI_TRANSITIONS=546} [2021-11-07 07:51:19,851 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 515 predicate places. [2021-11-07 07:51:19,851 INFO L470 AbstractCegarLoop]: Abstraction has has 581 places, 546 transitions, 16060 flow [2021-11-07 07:51:19,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:19,851 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:51:19,851 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:19,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:20,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-07 07:51:20,065 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:51:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:20,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1990586465, now seen corresponding path program 51 times [2021-11-07 07:51:20,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:20,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364258157] [2021-11-07 07:51:20,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:20,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:20,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:20,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364258157] [2021-11-07 07:51:20,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364258157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:20,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678797249] [2021-11-07 07:51:20,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:51:20,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:20,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:20,265 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:20,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-07 07:51:22,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-07 07:51:22,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:22,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:51:22,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:22,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678797249] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:22,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:22,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-07 07:51:22,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255780391] [2021-11-07 07:51:22,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:51:22,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:22,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:51:22,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:51:22,602 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:51:22,603 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 546 transitions, 16060 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:22,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:51:22,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:51:22,603 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:51:24,787 INFO L129 PetriNetUnfolder]: 459/3421 cut-off events. [2021-11-07 07:51:24,787 INFO L130 PetriNetUnfolder]: For 330511/330930 co-relation queries the response was YES. [2021-11-07 07:51:24,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25348 conditions, 3421 events. 459/3421 cut-off events. For 330511/330930 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 32012 event pairs, 0 based on Foata normal form. 154/3212 useless extension candidates. Maximal degree in co-relation 25090. Up to 591 conditions per place. [2021-11-07 07:51:24,870 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 125 selfloop transitions, 416 changer transitions 8/593 dead transitions. [2021-11-07 07:51:24,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 593 transitions, 20492 flow [2021-11-07 07:51:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 07:51:24,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-11-07 07:51:24,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2227 transitions. [2021-11-07 07:51:24,872 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.843560606060606 [2021-11-07 07:51:24,872 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2227 transitions. [2021-11-07 07:51:24,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2227 transitions. [2021-11-07 07:51:24,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:51:24,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2227 transitions. [2021-11-07 07:51:24,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.675) internal successors, (2227), 40 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:24,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:24,876 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:24,876 INFO L186 Difference]: Start difference. First operand has 581 places, 546 transitions, 16060 flow. Second operand 40 states and 2227 transitions. [2021-11-07 07:51:24,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 593 transitions, 20492 flow [2021-11-07 07:51:26,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 593 transitions, 19408 flow, removed 173 selfloop flow, removed 35 redundant places. [2021-11-07 07:51:26,188 INFO L242 Difference]: Finished difference. Result has 589 places, 552 transitions, 16494 flow [2021-11-07 07:51:26,189 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=15094, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=16494, PETRI_PLACES=589, PETRI_TRANSITIONS=552} [2021-11-07 07:51:26,189 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 523 predicate places. [2021-11-07 07:51:26,189 INFO L470 AbstractCegarLoop]: Abstraction has has 589 places, 552 transitions, 16494 flow [2021-11-07 07:51:26,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:26,189 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:51:26,189 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:26,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:26,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:26,390 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:51:26,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:26,390 INFO L85 PathProgramCache]: Analyzing trace with hash -73809751, now seen corresponding path program 52 times [2021-11-07 07:51:26,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:26,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711946844] [2021-11-07 07:51:26,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:26,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:26,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:26,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711946844] [2021-11-07 07:51:26,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711946844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:26,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111772636] [2021-11-07 07:51:26,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:51:26,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:26,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:26,572 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:26,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-07 07:51:28,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:51:28,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:28,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:51:28,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:28,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111772636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:28,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:28,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-11-07 07:51:28,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529406607] [2021-11-07 07:51:28,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:51:28,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:28,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:51:28,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:51:28,915 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:51:28,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 552 transitions, 16494 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:28,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:51:28,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:51:28,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:51:31,211 INFO L129 PetriNetUnfolder]: 465/3474 cut-off events. [2021-11-07 07:51:31,211 INFO L130 PetriNetUnfolder]: For 369036/369445 co-relation queries the response was YES. [2021-11-07 07:51:31,287 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26512 conditions, 3474 events. 465/3474 cut-off events. For 369036/369445 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 32516 event pairs, 0 based on Foata normal form. 163/3269 useless extension candidates. Maximal degree in co-relation 26250. Up to 599 conditions per place. [2021-11-07 07:51:31,310 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 124 selfloop transitions, 427 changer transitions 17/612 dead transitions. [2021-11-07 07:51:31,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 612 transitions, 22034 flow [2021-11-07 07:51:31,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 07:51:31,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-11-07 07:51:31,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2448 transitions. [2021-11-07 07:51:31,312 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8429752066115702 [2021-11-07 07:51:31,312 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2448 transitions. [2021-11-07 07:51:31,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2448 transitions. [2021-11-07 07:51:31,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:51:31,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2448 transitions. [2021-11-07 07:51:31,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 55.63636363636363) internal successors, (2448), 44 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:31,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:31,318 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:31,318 INFO L186 Difference]: Start difference. First operand has 589 places, 552 transitions, 16494 flow. Second operand 44 states and 2448 transitions. [2021-11-07 07:51:31,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 612 transitions, 22034 flow [2021-11-07 07:51:32,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 612 transitions, 20606 flow, removed 320 selfloop flow, removed 37 redundant places. [2021-11-07 07:51:32,554 INFO L242 Difference]: Finished difference. Result has 602 places, 565 transitions, 17034 flow [2021-11-07 07:51:32,555 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=15398, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=17034, PETRI_PLACES=602, PETRI_TRANSITIONS=565} [2021-11-07 07:51:32,555 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 536 predicate places. [2021-11-07 07:51:32,555 INFO L470 AbstractCegarLoop]: Abstraction has has 602 places, 565 transitions, 17034 flow [2021-11-07 07:51:32,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:32,555 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:51:32,555 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:32,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:32,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-07 07:51:32,756 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:51:32,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:32,756 INFO L85 PathProgramCache]: Analyzing trace with hash -264567872, now seen corresponding path program 53 times [2021-11-07 07:51:32,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:32,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096902992] [2021-11-07 07:51:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:32,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:51:32,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:32,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096902992] [2021-11-07 07:51:32,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096902992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:32,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174249483] [2021-11-07 07:51:32,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:51:32,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:32,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:32,922 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:32,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-07 07:51:34,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-07 07:51:34,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:34,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:51:34,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:51:35,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174249483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:35,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:35,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-07 07:51:35,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594464267] [2021-11-07 07:51:35,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:51:35,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:35,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:51:35,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:51:35,301 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:51:35,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 565 transitions, 17034 flow. Second operand has 21 states, 21 states have (on average 54.142857142857146) internal successors, (1137), 21 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:35,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:51:35,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:51:35,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:51:37,279 INFO L129 PetriNetUnfolder]: 460/3452 cut-off events. [2021-11-07 07:51:37,279 INFO L130 PetriNetUnfolder]: For 393986/394387 co-relation queries the response was YES. [2021-11-07 07:51:37,358 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26785 conditions, 3452 events. 460/3452 cut-off events. For 393986/394387 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 32547 event pairs, 0 based on Foata normal form. 164/3249 useless extension candidates. Maximal degree in co-relation 26516. Up to 591 conditions per place. [2021-11-07 07:51:37,588 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 127 selfloop transitions, 425 changer transitions 5/601 dead transitions. [2021-11-07 07:51:37,588 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 601 transitions, 21312 flow [2021-11-07 07:51:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 07:51:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-07 07:51:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1945 transitions. [2021-11-07 07:51:37,590 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841991341991342 [2021-11-07 07:51:37,590 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1945 transitions. [2021-11-07 07:51:37,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1945 transitions. [2021-11-07 07:51:37,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:51:37,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1945 transitions. [2021-11-07 07:51:37,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.57142857142857) internal successors, (1945), 35 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:37,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:37,594 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:37,594 INFO L186 Difference]: Start difference. First operand has 602 places, 565 transitions, 17034 flow. Second operand 35 states and 1945 transitions. [2021-11-07 07:51:37,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 601 transitions, 21312 flow [2021-11-07 07:51:38,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 601 transitions, 19774 flow, removed 388 selfloop flow, removed 37 redundant places. [2021-11-07 07:51:38,976 INFO L242 Difference]: Finished difference. Result has 598 places, 568 transitions, 16813 flow [2021-11-07 07:51:38,976 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=15702, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=422, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=16813, PETRI_PLACES=598, PETRI_TRANSITIONS=568} [2021-11-07 07:51:38,976 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 532 predicate places. [2021-11-07 07:51:38,976 INFO L470 AbstractCegarLoop]: Abstraction has has 598 places, 568 transitions, 16813 flow [2021-11-07 07:51:38,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.142857142857146) internal successors, (1137), 21 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:38,977 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:51:38,977 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:39,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:39,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-07 07:51:39,177 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:51:39,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:39,178 INFO L85 PathProgramCache]: Analyzing trace with hash -932914303, now seen corresponding path program 54 times [2021-11-07 07:51:39,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:39,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252092777] [2021-11-07 07:51:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:39,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:39,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:39,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252092777] [2021-11-07 07:51:39,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252092777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:39,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69882568] [2021-11-07 07:51:39,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:51:39,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:39,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:39,463 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:39,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-07 07:51:41,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-07 07:51:41,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:41,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:51:41,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:42,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69882568] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:42,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:42,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-07 07:51:42,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146394037] [2021-11-07 07:51:42,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:51:42,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:42,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:51:42,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:51:42,104 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:51:42,105 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 568 transitions, 16813 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:42,105 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:51:42,105 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:51:42,105 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:51:43,733 INFO L129 PetriNetUnfolder]: 464/3473 cut-off events. [2021-11-07 07:51:43,733 INFO L130 PetriNetUnfolder]: For 382126/382573 co-relation queries the response was YES. [2021-11-07 07:51:43,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26696 conditions, 3473 events. 464/3473 cut-off events. For 382126/382573 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 32633 event pairs, 0 based on Foata normal form. 61/3163 useless extension candidates. Maximal degree in co-relation 26427. Up to 728 conditions per place. [2021-11-07 07:51:44,022 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 473 selfloop transitions, 80 changer transitions 8/605 dead transitions. [2021-11-07 07:51:44,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 605 transitions, 20456 flow [2021-11-07 07:51:44,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:51:44,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-07 07:51:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1386 transitions. [2021-11-07 07:51:44,023 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.84 [2021-11-07 07:51:44,023 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1386 transitions. [2021-11-07 07:51:44,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1386 transitions. [2021-11-07 07:51:44,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:51:44,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1386 transitions. [2021-11-07 07:51:44,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.44) internal successors, (1386), 25 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:44,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:44,026 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:44,026 INFO L186 Difference]: Start difference. First operand has 598 places, 568 transitions, 16813 flow. Second operand 25 states and 1386 transitions. [2021-11-07 07:51:44,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 605 transitions, 20456 flow [2021-11-07 07:51:45,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 588 places, 605 transitions, 19439 flow, removed 113 selfloop flow, removed 32 redundant places. [2021-11-07 07:51:45,280 INFO L242 Difference]: Finished difference. Result has 593 places, 570 transitions, 16256 flow [2021-11-07 07:51:45,280 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=15890, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=16256, PETRI_PLACES=593, PETRI_TRANSITIONS=570} [2021-11-07 07:51:45,280 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 527 predicate places. [2021-11-07 07:51:45,281 INFO L470 AbstractCegarLoop]: Abstraction has has 593 places, 570 transitions, 16256 flow [2021-11-07 07:51:45,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:45,281 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:51:45,281 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:45,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:45,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:45,482 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:51:45,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:45,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1916105193, now seen corresponding path program 55 times [2021-11-07 07:51:45,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:45,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038045976] [2021-11-07 07:51:45,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:45,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:45,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:45,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038045976] [2021-11-07 07:51:45,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038045976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:45,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955089932] [2021-11-07 07:51:45,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:51:45,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:45,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:45,742 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:45,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-07 07:51:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:47,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:51:47,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:48,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955089932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:48,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:48,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-11-07 07:51:48,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97712916] [2021-11-07 07:51:48,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:51:48,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:48,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:51:48,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:51:48,402 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:51:48,403 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 570 transitions, 16256 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:48,403 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:51:48,403 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:51:48,403 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:51:50,455 INFO L129 PetriNetUnfolder]: 472/3552 cut-off events. [2021-11-07 07:51:50,455 INFO L130 PetriNetUnfolder]: For 397912/398320 co-relation queries the response was YES. [2021-11-07 07:51:50,539 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27151 conditions, 3552 events. 472/3552 cut-off events. For 397912/398320 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 33509 event pairs, 0 based on Foata normal form. 70/3242 useless extension candidates. Maximal degree in co-relation 26879. Up to 644 conditions per place. [2021-11-07 07:51:50,563 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 428 selfloop transitions, 134 changer transitions 8/614 dead transitions. [2021-11-07 07:51:50,563 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 614 transitions, 20359 flow [2021-11-07 07:51:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 07:51:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-07 07:51:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1606 transitions. [2021-11-07 07:51:50,565 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8390804597701149 [2021-11-07 07:51:50,565 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1606 transitions. [2021-11-07 07:51:50,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1606 transitions. [2021-11-07 07:51:50,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:51:50,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1606 transitions. [2021-11-07 07:51:50,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.37931034482759) internal successors, (1606), 29 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:50,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:50,568 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:50,568 INFO L186 Difference]: Start difference. First operand has 593 places, 570 transitions, 16256 flow. Second operand 29 states and 1606 transitions. [2021-11-07 07:51:50,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 614 transitions, 20359 flow [2021-11-07 07:51:51,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 614 transitions, 19977 flow, removed 115 selfloop flow, removed 22 redundant places. [2021-11-07 07:51:51,801 INFO L242 Difference]: Finished difference. Result has 603 places, 578 transitions, 16806 flow [2021-11-07 07:51:51,802 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=15966, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=16806, PETRI_PLACES=603, PETRI_TRANSITIONS=578} [2021-11-07 07:51:51,802 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 537 predicate places. [2021-11-07 07:51:51,802 INFO L470 AbstractCegarLoop]: Abstraction has has 603 places, 578 transitions, 16806 flow [2021-11-07 07:51:51,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:51,802 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:51:51,802 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:51,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:52,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-11-07 07:51:52,003 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:51:52,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:52,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1267237785, now seen corresponding path program 56 times [2021-11-07 07:51:52,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:52,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940904657] [2021-11-07 07:51:52,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:52,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:52,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:52,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940904657] [2021-11-07 07:51:52,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940904657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:52,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040982405] [2021-11-07 07:51:52,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:51:52,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:52,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:52,221 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:52,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-07 07:51:54,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:51:54,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:54,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:51:54,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:54,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040982405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:54,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:54,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-07 07:51:54,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736996951] [2021-11-07 07:51:54,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:51:54,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:54,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:51:54,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:51:54,900 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:51:54,900 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 603 places, 578 transitions, 16806 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:54,901 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:51:54,901 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:51:54,901 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:51:56,947 INFO L129 PetriNetUnfolder]: 476/3581 cut-off events. [2021-11-07 07:51:56,948 INFO L130 PetriNetUnfolder]: For 410237/410676 co-relation queries the response was YES. [2021-11-07 07:51:57,236 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27647 conditions, 3581 events. 476/3581 cut-off events. For 410237/410676 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 33811 event pairs, 0 based on Foata normal form. 98/3296 useless extension candidates. Maximal degree in co-relation 27371. Up to 615 conditions per place. [2021-11-07 07:51:57,275 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 295 selfloop transitions, 266 changer transitions 8/613 dead transitions. [2021-11-07 07:51:57,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 613 transitions, 20734 flow [2021-11-07 07:51:57,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 07:51:57,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-07 07:51:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1663 transitions. [2021-11-07 07:51:57,278 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8398989898989899 [2021-11-07 07:51:57,278 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1663 transitions. [2021-11-07 07:51:57,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1663 transitions. [2021-11-07 07:51:57,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:51:57,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1663 transitions. [2021-11-07 07:51:57,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.43333333333333) internal successors, (1663), 30 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:57,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:57,283 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:57,283 INFO L186 Difference]: Start difference. First operand has 603 places, 578 transitions, 16806 flow. Second operand 30 states and 1663 transitions. [2021-11-07 07:51:57,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 613 transitions, 20734 flow [2021-11-07 07:51:58,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 613 transitions, 20244 flow, removed 127 selfloop flow, removed 24 redundant places. [2021-11-07 07:51:58,798 INFO L242 Difference]: Finished difference. Result has 610 places, 582 transitions, 17288 flow [2021-11-07 07:51:58,799 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=16424, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=17288, PETRI_PLACES=610, PETRI_TRANSITIONS=582} [2021-11-07 07:51:58,799 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 544 predicate places. [2021-11-07 07:51:58,799 INFO L470 AbstractCegarLoop]: Abstraction has has 610 places, 582 transitions, 17288 flow [2021-11-07 07:51:58,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:58,799 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:51:58,799 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:58,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:58,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:59,000 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:51:59,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:59,000 INFO L85 PathProgramCache]: Analyzing trace with hash -561075181, now seen corresponding path program 57 times [2021-11-07 07:51:59,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:59,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224798082] [2021-11-07 07:51:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:59,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:59,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:59,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224798082] [2021-11-07 07:51:59,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224798082] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:59,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189546192] [2021-11-07 07:51:59,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:51:59,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:59,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:59,254 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:59,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-07 07:52:01,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-07 07:52:01,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:01,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:52:01,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:02,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189546192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:02,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:02,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-11-07 07:52:02,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893038091] [2021-11-07 07:52:02,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:52:02,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:02,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:52:02,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:52:02,039 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:52:02,040 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 582 transitions, 17288 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:02,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:52:02,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:52:02,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:52:04,130 INFO L129 PetriNetUnfolder]: 478/3599 cut-off events. [2021-11-07 07:52:04,130 INFO L130 PetriNetUnfolder]: For 412955/413393 co-relation queries the response was YES. [2021-11-07 07:52:04,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27951 conditions, 3599 events. 478/3599 cut-off events. For 412955/413393 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 34003 event pairs, 0 based on Foata normal form. 107/3321 useless extension candidates. Maximal degree in co-relation 27673. Up to 619 conditions per place. [2021-11-07 07:52:04,439 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 262 selfloop transitions, 302 changer transitions 8/616 dead transitions. [2021-11-07 07:52:04,440 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 616 transitions, 21230 flow [2021-11-07 07:52:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 07:52:04,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-07 07:52:04,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1830 transitions. [2021-11-07 07:52:04,442 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8402203856749312 [2021-11-07 07:52:04,443 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1830 transitions. [2021-11-07 07:52:04,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1830 transitions. [2021-11-07 07:52:04,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:52:04,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1830 transitions. [2021-11-07 07:52:04,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.45454545454545) internal successors, (1830), 33 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:04,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:04,447 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:04,447 INFO L186 Difference]: Start difference. First operand has 610 places, 582 transitions, 17288 flow. Second operand 33 states and 1830 transitions. [2021-11-07 07:52:04,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 616 transitions, 21230 flow [2021-11-07 07:52:06,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 616 transitions, 20474 flow, removed 127 selfloop flow, removed 27 redundant places. [2021-11-07 07:52:06,134 INFO L242 Difference]: Finished difference. Result has 617 places, 584 transitions, 17484 flow [2021-11-07 07:52:06,135 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=16644, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=17484, PETRI_PLACES=617, PETRI_TRANSITIONS=584} [2021-11-07 07:52:06,135 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 551 predicate places. [2021-11-07 07:52:06,135 INFO L470 AbstractCegarLoop]: Abstraction has has 617 places, 584 transitions, 17484 flow [2021-11-07 07:52:06,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:06,136 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:52:06,136 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:06,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-11-07 07:52:06,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:06,361 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:52:06,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:06,361 INFO L85 PathProgramCache]: Analyzing trace with hash 882756211, now seen corresponding path program 58 times [2021-11-07 07:52:06,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:06,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361198972] [2021-11-07 07:52:06,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:06,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:06,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:06,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361198972] [2021-11-07 07:52:06,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361198972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:06,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707519609] [2021-11-07 07:52:06,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:52:06,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:06,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:06,576 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:06,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-07 07:52:08,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:52:08,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:08,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:52:08,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:09,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707519609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:09,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:09,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-11-07 07:52:09,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797501146] [2021-11-07 07:52:09,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:52:09,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:09,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:52:09,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:52:09,305 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:52:09,306 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 584 transitions, 17484 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:09,306 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:52:09,307 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:52:09,307 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:52:11,539 INFO L129 PetriNetUnfolder]: 491/3716 cut-off events. [2021-11-07 07:52:11,539 INFO L130 PetriNetUnfolder]: For 428722/429160 co-relation queries the response was YES. [2021-11-07 07:52:11,608 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28999 conditions, 3716 events. 491/3716 cut-off events. For 428722/429160 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 35413 event pairs, 0 based on Foata normal form. 123/3442 useless extension candidates. Maximal degree in co-relation 28719. Up to 645 conditions per place. [2021-11-07 07:52:11,634 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 212 selfloop transitions, 366 changer transitions 8/630 dead transitions. [2021-11-07 07:52:11,634 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 630 transitions, 22148 flow [2021-11-07 07:52:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 07:52:11,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-07 07:52:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1942 transitions. [2021-11-07 07:52:11,636 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8406926406926407 [2021-11-07 07:52:11,636 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1942 transitions. [2021-11-07 07:52:11,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1942 transitions. [2021-11-07 07:52:11,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:52:11,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1942 transitions. [2021-11-07 07:52:11,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.48571428571429) internal successors, (1942), 35 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:11,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:11,639 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:11,639 INFO L186 Difference]: Start difference. First operand has 617 places, 584 transitions, 17484 flow. Second operand 35 states and 1942 transitions. [2021-11-07 07:52:11,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 630 transitions, 22148 flow [2021-11-07 07:52:13,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 630 transitions, 21342 flow, removed 131 selfloop flow, removed 29 redundant places. [2021-11-07 07:52:13,274 INFO L242 Difference]: Finished difference. Result has 631 places, 599 transitions, 18571 flow [2021-11-07 07:52:13,275 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=16802, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18571, PETRI_PLACES=631, PETRI_TRANSITIONS=599} [2021-11-07 07:52:13,275 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 565 predicate places. [2021-11-07 07:52:13,275 INFO L470 AbstractCegarLoop]: Abstraction has has 631 places, 599 transitions, 18571 flow [2021-11-07 07:52:13,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:13,275 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:52:13,275 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:13,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-07 07:52:13,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:13,476 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:52:13,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:13,477 INFO L85 PathProgramCache]: Analyzing trace with hash -262332753, now seen corresponding path program 59 times [2021-11-07 07:52:13,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:13,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115266328] [2021-11-07 07:52:13,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:13,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:13,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:13,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115266328] [2021-11-07 07:52:13,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115266328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:13,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275072994] [2021-11-07 07:52:13,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:52:13,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:13,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:13,690 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:13,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-07 07:52:16,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-07 07:52:16,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:16,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:52:16,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:16,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275072994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:16,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:16,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-11-07 07:52:16,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419348992] [2021-11-07 07:52:16,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:52:16,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:16,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:52:16,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:52:16,403 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:52:16,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 599 transitions, 18571 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:16,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:52:16,405 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:52:16,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:52:18,755 INFO L129 PetriNetUnfolder]: 493/3734 cut-off events. [2021-11-07 07:52:18,755 INFO L130 PetriNetUnfolder]: For 446448/446895 co-relation queries the response was YES. [2021-11-07 07:52:18,829 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29602 conditions, 3734 events. 493/3734 cut-off events. For 446448/446895 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 35680 event pairs, 0 based on Foata normal form. 142/3477 useless extension candidates. Maximal degree in co-relation 29313. Up to 649 conditions per place. [2021-11-07 07:52:18,855 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 172 selfloop transitions, 409 changer transitions 8/633 dead transitions. [2021-11-07 07:52:18,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 664 places, 633 transitions, 22925 flow [2021-11-07 07:52:18,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-07 07:52:18,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-07 07:52:18,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2054 transitions. [2021-11-07 07:52:18,857 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8411138411138411 [2021-11-07 07:52:18,857 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2054 transitions. [2021-11-07 07:52:18,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2054 transitions. [2021-11-07 07:52:18,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:52:18,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2054 transitions. [2021-11-07 07:52:18,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.513513513513516) internal successors, (2054), 37 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:18,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 66.0) internal successors, (2508), 38 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:18,864 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 66.0) internal successors, (2508), 38 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:18,864 INFO L186 Difference]: Start difference. First operand has 631 places, 599 transitions, 18571 flow. Second operand 37 states and 2054 transitions. [2021-11-07 07:52:18,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 664 places, 633 transitions, 22925 flow [2021-11-07 07:52:20,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 633 transitions, 22130 flow, removed 168 selfloop flow, removed 25 redundant places. [2021-11-07 07:52:20,745 INFO L242 Difference]: Finished difference. Result has 644 places, 601 transitions, 18940 flow [2021-11-07 07:52:20,746 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=17862, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=18940, PETRI_PLACES=644, PETRI_TRANSITIONS=601} [2021-11-07 07:52:20,746 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 578 predicate places. [2021-11-07 07:52:20,746 INFO L470 AbstractCegarLoop]: Abstraction has has 644 places, 601 transitions, 18940 flow [2021-11-07 07:52:20,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:20,746 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:52:20,746 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:20,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-07 07:52:20,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:20,947 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:52:20,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:20,947 INFO L85 PathProgramCache]: Analyzing trace with hash 521697629, now seen corresponding path program 60 times [2021-11-07 07:52:20,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:20,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916060507] [2021-11-07 07:52:20,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:20,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:21,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:21,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916060507] [2021-11-07 07:52:21,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916060507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:21,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869121484] [2021-11-07 07:52:21,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:52:21,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:21,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:21,161 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:21,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-07 07:52:23,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-07 07:52:23,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:23,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:52:23,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:23,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869121484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:23,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:23,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-07 07:52:23,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230922451] [2021-11-07 07:52:23,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:52:23,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:23,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:52:23,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:52:23,817 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:52:23,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 601 transitions, 18940 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:23,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:52:23,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:52:23,819 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:52:26,137 INFO L129 PetriNetUnfolder]: 497/3777 cut-off events. [2021-11-07 07:52:26,137 INFO L130 PetriNetUnfolder]: For 460410/460815 co-relation queries the response was YES. [2021-11-07 07:52:26,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30284 conditions, 3777 events. 497/3777 cut-off events. For 460410/460815 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 36039 event pairs, 0 based on Foata normal form. 143/3516 useless extension candidates. Maximal degree in co-relation 29993. Up to 655 conditions per place. [2021-11-07 07:52:26,244 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 161 selfloop transitions, 425 changer transitions 8/638 dead transitions. [2021-11-07 07:52:26,244 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 676 places, 638 transitions, 23488 flow [2021-11-07 07:52:26,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 07:52:26,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-07 07:52:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1999 transitions. [2021-11-07 07:52:26,246 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8413299663299664 [2021-11-07 07:52:26,246 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1999 transitions. [2021-11-07 07:52:26,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1999 transitions. [2021-11-07 07:52:26,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:52:26,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1999 transitions. [2021-11-07 07:52:26,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.52777777777778) internal successors, (1999), 36 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:26,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:26,249 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:26,249 INFO L186 Difference]: Start difference. First operand has 644 places, 601 transitions, 18940 flow. Second operand 36 states and 1999 transitions. [2021-11-07 07:52:26,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 676 places, 638 transitions, 23488 flow [2021-11-07 07:52:28,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 638 transitions, 22404 flow, removed 162 selfloop flow, removed 34 redundant places. [2021-11-07 07:52:28,149 INFO L242 Difference]: Finished difference. Result has 649 places, 605 transitions, 19287 flow [2021-11-07 07:52:28,149 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=18030, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=19287, PETRI_PLACES=649, PETRI_TRANSITIONS=605} [2021-11-07 07:52:28,149 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 583 predicate places. [2021-11-07 07:52:28,149 INFO L470 AbstractCegarLoop]: Abstraction has has 649 places, 605 transitions, 19287 flow [2021-11-07 07:52:28,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:28,150 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:52:28,150 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:28,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-07 07:52:28,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:28,353 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:52:28,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:28,353 INFO L85 PathProgramCache]: Analyzing trace with hash 744017793, now seen corresponding path program 61 times [2021-11-07 07:52:28,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:28,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735354708] [2021-11-07 07:52:28,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:28,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:28,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:28,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735354708] [2021-11-07 07:52:28,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735354708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:28,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109257322] [2021-11-07 07:52:28,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:52:28,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:28,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:28,565 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:28,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-07 07:52:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:30,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:52:30,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:31,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109257322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:31,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:31,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-11-07 07:52:31,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142126197] [2021-11-07 07:52:31,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:52:31,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:52:31,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:52:31,171 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:52:31,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 649 places, 605 transitions, 19287 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:31,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:52:31,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:52:31,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:52:33,561 INFO L129 PetriNetUnfolder]: 500/3797 cut-off events. [2021-11-07 07:52:33,561 INFO L130 PetriNetUnfolder]: For 452884/453307 co-relation queries the response was YES. [2021-11-07 07:52:33,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30398 conditions, 3797 events. 500/3797 cut-off events. For 452884/453307 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 36263 event pairs, 0 based on Foata normal form. 176/3568 useless extension candidates. Maximal degree in co-relation 30103. Up to 661 conditions per place. [2021-11-07 07:52:33,675 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 109 selfloop transitions, 485 changer transitions 8/646 dead transitions. [2021-11-07 07:52:33,676 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 646 transitions, 24198 flow [2021-11-07 07:52:33,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 07:52:33,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-11-07 07:52:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2278 transitions. [2021-11-07 07:52:33,677 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8418329637841833 [2021-11-07 07:52:33,677 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2278 transitions. [2021-11-07 07:52:33,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2278 transitions. [2021-11-07 07:52:33,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:52:33,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2278 transitions. [2021-11-07 07:52:33,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 55.5609756097561) internal successors, (2278), 41 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:33,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 66.0) internal successors, (2772), 42 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:33,681 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 66.0) internal successors, (2772), 42 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:33,681 INFO L186 Difference]: Start difference. First operand has 649 places, 605 transitions, 19287 flow. Second operand 41 states and 2278 transitions. [2021-11-07 07:52:33,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 646 transitions, 24198 flow [2021-11-07 07:52:35,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 654 places, 646 transitions, 23175 flow, removed 146 selfloop flow, removed 32 redundant places. [2021-11-07 07:52:35,613 INFO L242 Difference]: Finished difference. Result has 660 places, 609 transitions, 19823 flow [2021-11-07 07:52:35,614 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=18412, PETRI_DIFFERENCE_MINUEND_PLACES=614, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=19823, PETRI_PLACES=660, PETRI_TRANSITIONS=609} [2021-11-07 07:52:35,614 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 594 predicate places. [2021-11-07 07:52:35,614 INFO L470 AbstractCegarLoop]: Abstraction has has 660 places, 609 transitions, 19823 flow [2021-11-07 07:52:35,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:35,614 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:52:35,614 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:35,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-07 07:52:35,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-07 07:52:35,815 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:52:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:35,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1613791243, now seen corresponding path program 62 times [2021-11-07 07:52:35,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:35,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457472291] [2021-11-07 07:52:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:35,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:35,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:35,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457472291] [2021-11-07 07:52:35,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457472291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:35,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77774074] [2021-11-07 07:52:35,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:52:35,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:35,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:36,000 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:36,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-07 07:52:38,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:52:38,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:38,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:52:38,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:38,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77774074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:38,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:38,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-07 07:52:38,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579140602] [2021-11-07 07:52:38,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:52:38,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:38,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:52:38,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:52:38,655 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:52:38,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 660 places, 609 transitions, 19823 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:38,655 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:52:38,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:52:38,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:52:41,101 INFO L129 PetriNetUnfolder]: 506/3821 cut-off events. [2021-11-07 07:52:41,101 INFO L130 PetriNetUnfolder]: For 477604/478092 co-relation queries the response was YES. [2021-11-07 07:52:41,188 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31160 conditions, 3821 events. 506/3821 cut-off events. For 477604/478092 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 36571 event pairs, 0 based on Foata normal form. 187/3601 useless extension candidates. Maximal degree in co-relation 30862. Up to 669 conditions per place. [2021-11-07 07:52:41,216 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 105 selfloop transitions, 497 changer transitions 8/654 dead transitions. [2021-11-07 07:52:41,216 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 654 transitions, 25098 flow [2021-11-07 07:52:41,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 07:52:41,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-07 07:52:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2335 transitions. [2021-11-07 07:52:41,218 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8423520923520924 [2021-11-07 07:52:41,218 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2335 transitions. [2021-11-07 07:52:41,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2335 transitions. [2021-11-07 07:52:41,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:52:41,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2335 transitions. [2021-11-07 07:52:41,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.595238095238095) internal successors, (2335), 42 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:41,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 66.0) internal successors, (2838), 43 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:41,225 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 66.0) internal successors, (2838), 43 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:41,225 INFO L186 Difference]: Start difference. First operand has 660 places, 609 transitions, 19823 flow. Second operand 42 states and 2335 transitions. [2021-11-07 07:52:41,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 654 transitions, 25098 flow [2021-11-07 07:52:43,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 662 places, 654 transitions, 23849 flow, removed 190 selfloop flow, removed 36 redundant places. [2021-11-07 07:52:43,796 INFO L242 Difference]: Finished difference. Result has 669 places, 615 transitions, 20260 flow [2021-11-07 07:52:43,797 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=18684, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=20260, PETRI_PLACES=669, PETRI_TRANSITIONS=615} [2021-11-07 07:52:43,797 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 603 predicate places. [2021-11-07 07:52:43,797 INFO L470 AbstractCegarLoop]: Abstraction has has 669 places, 615 transitions, 20260 flow [2021-11-07 07:52:43,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:43,797 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:52:43,797 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:43,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-07 07:52:43,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-07 07:52:43,998 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:52:43,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:43,998 INFO L85 PathProgramCache]: Analyzing trace with hash 588648628, now seen corresponding path program 63 times [2021-11-07 07:52:43,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:43,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691542989] [2021-11-07 07:52:43,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:43,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:44,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:44,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691542989] [2021-11-07 07:52:44,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691542989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:44,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380700936] [2021-11-07 07:52:44,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:52:44,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:44,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:44,268 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:44,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-07 07:52:46,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-07 07:52:46,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:46,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 07:52:46,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:47,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380700936] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:47,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:47,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-11-07 07:52:47,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200173864] [2021-11-07 07:52:47,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:52:47,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:47,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:52:47,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:52:47,281 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:52:47,282 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 669 places, 615 transitions, 20260 flow. Second operand has 22 states, 22 states have (on average 54.04545454545455) internal successors, (1189), 22 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:47,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:52:47,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:52:47,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:52:49,404 INFO L129 PetriNetUnfolder]: 508/3853 cut-off events. [2021-11-07 07:52:49,405 INFO L130 PetriNetUnfolder]: For 502293/502715 co-relation queries the response was YES. [2021-11-07 07:52:49,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31931 conditions, 3853 events. 508/3853 cut-off events. For 502293/502715 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 36804 event pairs, 0 based on Foata normal form. 67/3508 useless extension candidates. Maximal degree in co-relation 31629. Up to 899 conditions per place. [2021-11-07 07:52:49,503 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 561 selfloop transitions, 35 changer transitions 8/648 dead transitions. [2021-11-07 07:52:49,503 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 690 places, 648 transitions, 23989 flow [2021-11-07 07:52:49,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:52:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-07 07:52:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1385 transitions. [2021-11-07 07:52:49,504 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8393939393939394 [2021-11-07 07:52:49,504 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1385 transitions. [2021-11-07 07:52:49,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1385 transitions. [2021-11-07 07:52:49,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:52:49,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1385 transitions. [2021-11-07 07:52:49,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.4) internal successors, (1385), 25 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:49,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:49,506 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:49,506 INFO L186 Difference]: Start difference. First operand has 669 places, 615 transitions, 20260 flow. Second operand 25 states and 1385 transitions. [2021-11-07 07:52:49,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 690 places, 648 transitions, 23989 flow [2021-11-07 07:52:51,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 653 places, 648 transitions, 22709 flow, removed 194 selfloop flow, removed 37 redundant places. [2021-11-07 07:52:51,560 INFO L242 Difference]: Finished difference. Result has 658 places, 617 transitions, 19338 flow [2021-11-07 07:52:51,561 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=19054, PETRI_DIFFERENCE_MINUEND_PLACES=629, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=19338, PETRI_PLACES=658, PETRI_TRANSITIONS=617} [2021-11-07 07:52:51,561 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 592 predicate places. [2021-11-07 07:52:51,562 INFO L470 AbstractCegarLoop]: Abstraction has has 658 places, 617 transitions, 19338 flow [2021-11-07 07:52:51,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.04545454545455) internal successors, (1189), 22 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:51,562 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:52:51,562 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:51,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-11-07 07:52:51,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-07 07:52:51,789 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:52:51,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:51,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1224522086, now seen corresponding path program 64 times [2021-11-07 07:52:51,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:51,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937601415] [2021-11-07 07:52:51,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:51,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:52,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:52,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937601415] [2021-11-07 07:52:52,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937601415] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:52,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214810972] [2021-11-07 07:52:52,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:52:52,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:52,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:52,172 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:52,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-07 07:52:54,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:52:54,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:54,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 07:52:54,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:55,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214810972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:55,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:55,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-11-07 07:52:55,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939368219] [2021-11-07 07:52:55,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:52:55,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:55,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:52:55,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:52:55,318 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:52:55,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 658 places, 617 transitions, 19338 flow. Second operand has 22 states, 22 states have (on average 54.04545454545455) internal successors, (1189), 22 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:55,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:52:55,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:52:55,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:52:58,002 INFO L129 PetriNetUnfolder]: 510/3871 cut-off events. [2021-11-07 07:52:58,002 INFO L130 PetriNetUnfolder]: For 506567/507016 co-relation queries the response was YES. [2021-11-07 07:52:58,112 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31696 conditions, 3871 events. 510/3871 cut-off events. For 506567/507016 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 37083 event pairs, 0 based on Foata normal form. 75/3533 useless extension candidates. Maximal degree in co-relation 31393. Up to 795 conditions per place. [2021-11-07 07:52:58,146 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 505 selfloop transitions, 94 changer transitions 8/651 dead transitions. [2021-11-07 07:52:58,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 683 places, 651 transitions, 23208 flow [2021-11-07 07:52:58,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 07:52:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-07 07:52:58,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1608 transitions. [2021-11-07 07:52:58,148 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8401253918495298 [2021-11-07 07:52:58,148 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1608 transitions. [2021-11-07 07:52:58,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1608 transitions. [2021-11-07 07:52:58,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:52:58,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1608 transitions. [2021-11-07 07:52:58,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.44827586206897) internal successors, (1608), 29 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:58,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:58,153 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:58,153 INFO L186 Difference]: Start difference. First operand has 658 places, 617 transitions, 19338 flow. Second operand 29 states and 1608 transitions. [2021-11-07 07:52:58,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 683 places, 651 transitions, 23208 flow [2021-11-07 07:53:00,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 661 places, 651 transitions, 22888 flow, removed 127 selfloop flow, removed 22 redundant places. [2021-11-07 07:53:00,765 INFO L242 Difference]: Finished difference. Result has 666 places, 619 transitions, 19525 flow [2021-11-07 07:53:00,765 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=19118, PETRI_DIFFERENCE_MINUEND_PLACES=633, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=19525, PETRI_PLACES=666, PETRI_TRANSITIONS=619} [2021-11-07 07:53:00,766 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 600 predicate places. [2021-11-07 07:53:00,766 INFO L470 AbstractCegarLoop]: Abstraction has has 666 places, 619 transitions, 19525 flow [2021-11-07 07:53:00,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.04545454545455) internal successors, (1189), 22 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:00,766 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:53:00,766 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:00,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-11-07 07:53:00,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:00,969 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:53:00,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:00,969 INFO L85 PathProgramCache]: Analyzing trace with hash 310976952, now seen corresponding path program 65 times [2021-11-07 07:53:00,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:00,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992768403] [2021-11-07 07:53:00,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:00,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:01,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:01,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992768403] [2021-11-07 07:53:01,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992768403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:01,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286063642] [2021-11-07 07:53:01,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:53:01,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:01,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:01,337 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:01,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-07 07:53:04,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-07 07:53:04,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:04,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 07:53:04,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:04,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286063642] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:04,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:04,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-07 07:53:04,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195767166] [2021-11-07 07:53:04,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:53:04,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:04,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:53:04,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:53:04,966 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:53:04,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 619 transitions, 19525 flow. Second operand has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:04,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:53:04,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:53:04,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:53:07,799 INFO L129 PetriNetUnfolder]: 518/3950 cut-off events. [2021-11-07 07:53:07,800 INFO L130 PetriNetUnfolder]: For 517468/517879 co-relation queries the response was YES. [2021-11-07 07:53:07,917 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32478 conditions, 3950 events. 518/3950 cut-off events. For 517468/517879 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 38011 event pairs, 0 based on Foata normal form. 77/3605 useless extension candidates. Maximal degree in co-relation 32173. Up to 713 conditions per place. [2021-11-07 07:53:07,953 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 470 selfloop transitions, 144 changer transitions 8/666 dead transitions. [2021-11-07 07:53:07,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 693 places, 666 transitions, 24007 flow [2021-11-07 07:53:07,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 07:53:07,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-07 07:53:07,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1717 transitions. [2021-11-07 07:53:07,955 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8391984359726296 [2021-11-07 07:53:07,955 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1717 transitions. [2021-11-07 07:53:07,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1717 transitions. [2021-11-07 07:53:07,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:53:07,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1717 transitions. [2021-11-07 07:53:07,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.38709677419355) internal successors, (1717), 31 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:07,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:07,959 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:07,959 INFO L186 Difference]: Start difference. First operand has 666 places, 619 transitions, 19525 flow. Second operand 31 states and 1717 transitions. [2021-11-07 07:53:07,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 693 places, 666 transitions, 24007 flow [2021-11-07 07:53:11,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 666 transitions, 23574 flow, removed 127 selfloop flow, removed 26 redundant places. [2021-11-07 07:53:11,413 INFO L242 Difference]: Finished difference. Result has 674 places, 627 transitions, 20152 flow [2021-11-07 07:53:11,414 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=19196, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=20152, PETRI_PLACES=674, PETRI_TRANSITIONS=627} [2021-11-07 07:53:11,414 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 608 predicate places. [2021-11-07 07:53:11,414 INFO L470 AbstractCegarLoop]: Abstraction has has 674 places, 627 transitions, 20152 flow [2021-11-07 07:53:11,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:11,415 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:53:11,415 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:11,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-11-07 07:53:11,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:11,615 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:53:11,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:11,616 INFO L85 PathProgramCache]: Analyzing trace with hash -895231036, now seen corresponding path program 66 times [2021-11-07 07:53:11,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:11,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562247699] [2021-11-07 07:53:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:11,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:12,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:12,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562247699] [2021-11-07 07:53:12,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562247699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:12,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819590622] [2021-11-07 07:53:12,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:53:12,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:12,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:12,070 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:12,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-07 07:53:15,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-07 07:53:15,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:15,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 07:53:15,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:15,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819590622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:15,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:15,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-07 07:53:15,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141721371] [2021-11-07 07:53:15,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:53:15,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:15,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:53:15,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:53:15,870 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:53:15,871 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 674 places, 627 transitions, 20152 flow. Second operand has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:15,871 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:53:15,871 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:53:15,871 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:53:18,756 INFO L129 PetriNetUnfolder]: 520/3968 cut-off events. [2021-11-07 07:53:18,756 INFO L130 PetriNetUnfolder]: For 521125/521536 co-relation queries the response was YES. [2021-11-07 07:53:18,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32710 conditions, 3968 events. 520/3968 cut-off events. For 521125/521536 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 38120 event pairs, 0 based on Foata normal form. 90/3634 useless extension candidates. Maximal degree in co-relation 32400. Up to 695 conditions per place. [2021-11-07 07:53:18,908 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 378 selfloop transitions, 236 changer transitions 8/666 dead transitions. [2021-11-07 07:53:18,908 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 666 transitions, 24314 flow [2021-11-07 07:53:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 07:53:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-07 07:53:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1829 transitions. [2021-11-07 07:53:18,911 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.839761248852158 [2021-11-07 07:53:18,911 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1829 transitions. [2021-11-07 07:53:18,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1829 transitions. [2021-11-07 07:53:18,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:53:18,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1829 transitions. [2021-11-07 07:53:18,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.42424242424242) internal successors, (1829), 33 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:18,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:18,918 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:18,918 INFO L186 Difference]: Start difference. First operand has 674 places, 627 transitions, 20152 flow. Second operand 33 states and 1829 transitions. [2021-11-07 07:53:18,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 666 transitions, 24314 flow [2021-11-07 07:53:22,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 678 places, 666 transitions, 23821 flow, removed 131 selfloop flow, removed 25 redundant places. [2021-11-07 07:53:22,082 INFO L242 Difference]: Finished difference. Result has 683 places, 629 transitions, 20479 flow [2021-11-07 07:53:22,083 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=19767, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=20479, PETRI_PLACES=683, PETRI_TRANSITIONS=629} [2021-11-07 07:53:22,083 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 617 predicate places. [2021-11-07 07:53:22,084 INFO L470 AbstractCegarLoop]: Abstraction has has 683 places, 629 transitions, 20479 flow [2021-11-07 07:53:22,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:22,084 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:53:22,084 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:22,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:22,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:22,285 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:53:22,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:22,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1642150760, now seen corresponding path program 67 times [2021-11-07 07:53:22,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:22,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278934219] [2021-11-07 07:53:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:22,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:22,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:22,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278934219] [2021-11-07 07:53:22,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278934219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:22,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617208210] [2021-11-07 07:53:22,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:53:22,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:22,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:22,561 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:22,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-07 07:53:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:25,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 07:53:25,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:26,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617208210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:26,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:26,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-11-07 07:53:26,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484569091] [2021-11-07 07:53:26,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:53:26,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:26,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:53:26,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:53:26,266 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:53:26,266 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 683 places, 629 transitions, 20479 flow. Second operand has 22 states, 22 states have (on average 54.04545454545455) internal successors, (1189), 22 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:26,266 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:53:26,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:53:26,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:53:29,441 INFO L129 PetriNetUnfolder]: 522/3979 cut-off events. [2021-11-07 07:53:29,442 INFO L130 PetriNetUnfolder]: For 523507/523956 co-relation queries the response was YES. [2021-11-07 07:53:29,546 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32985 conditions, 3979 events. 522/3979 cut-off events. For 523507/523956 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 38248 event pairs, 0 based on Foata normal form. 124/3678 useless extension candidates. Maximal degree in co-relation 32673. Up to 699 conditions per place. [2021-11-07 07:53:29,581 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 267 selfloop transitions, 344 changer transitions 8/663 dead transitions. [2021-11-07 07:53:29,581 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 715 places, 663 transitions, 24768 flow [2021-11-07 07:53:29,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 07:53:29,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-07 07:53:29,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1997 transitions. [2021-11-07 07:53:29,583 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8404882154882155 [2021-11-07 07:53:29,583 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1997 transitions. [2021-11-07 07:53:29,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1997 transitions. [2021-11-07 07:53:29,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:53:29,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1997 transitions. [2021-11-07 07:53:29,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.47222222222222) internal successors, (1997), 36 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:29,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:29,588 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:29,588 INFO L186 Difference]: Start difference. First operand has 683 places, 629 transitions, 20479 flow. Second operand 36 states and 1997 transitions. [2021-11-07 07:53:29,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 715 places, 663 transitions, 24768 flow [2021-11-07 07:53:32,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 686 places, 663 transitions, 24105 flow, removed 135 selfloop flow, removed 29 redundant places. [2021-11-07 07:53:32,221 INFO L242 Difference]: Finished difference. Result has 691 places, 631 transitions, 20873 flow [2021-11-07 07:53:32,222 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=19932, PETRI_DIFFERENCE_MINUEND_PLACES=651, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=20873, PETRI_PLACES=691, PETRI_TRANSITIONS=631} [2021-11-07 07:53:32,222 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 625 predicate places. [2021-11-07 07:53:32,222 INFO L470 AbstractCegarLoop]: Abstraction has has 691 places, 631 transitions, 20873 flow [2021-11-07 07:53:32,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.04545454545455) internal successors, (1189), 22 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:32,223 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:53:32,223 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:32,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:32,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-11-07 07:53:32,424 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:53:32,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:32,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1990253682, now seen corresponding path program 68 times [2021-11-07 07:53:32,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:32,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716073108] [2021-11-07 07:53:32,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:32,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:32,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:32,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716073108] [2021-11-07 07:53:32,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716073108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:32,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510975612] [2021-11-07 07:53:32,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:53:32,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:32,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:32,848 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:32,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-07 07:53:36,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:53:36,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:36,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 07:53:36,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:36,567 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:36,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510975612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:36,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:36,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-11-07 07:53:36,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852968176] [2021-11-07 07:53:36,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:53:36,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:36,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:53:36,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:53:36,570 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:53:36,571 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 691 places, 631 transitions, 20873 flow. Second operand has 22 states, 22 states have (on average 54.04545454545455) internal successors, (1189), 22 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:36,571 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:53:36,571 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:53:36,571 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:53:39,615 INFO L129 PetriNetUnfolder]: 526/4015 cut-off events. [2021-11-07 07:53:39,615 INFO L130 PetriNetUnfolder]: For 528781/529230 co-relation queries the response was YES. [2021-11-07 07:53:39,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33466 conditions, 4015 events. 526/4015 cut-off events. For 528781/529230 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 38672 event pairs, 0 based on Foata normal form. 136/3722 useless extension candidates. Maximal degree in co-relation 33152. Up to 707 conditions per place. [2021-11-07 07:53:39,778 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 220 selfloop transitions, 396 changer transitions 8/668 dead transitions. [2021-11-07 07:53:39,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 725 places, 668 transitions, 25453 flow [2021-11-07 07:53:39,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 07:53:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-07 07:53:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2109 transitions. [2021-11-07 07:53:39,780 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-11-07 07:53:39,780 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2109 transitions. [2021-11-07 07:53:39,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2109 transitions. [2021-11-07 07:53:39,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:53:39,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2109 transitions. [2021-11-07 07:53:39,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.5) internal successors, (2109), 38 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:39,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:39,786 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:39,786 INFO L186 Difference]: Start difference. First operand has 691 places, 631 transitions, 20873 flow. Second operand 38 states and 2109 transitions. [2021-11-07 07:53:39,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 725 places, 668 transitions, 25453 flow [2021-11-07 07:53:42,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 691 places, 668 transitions, 24519 flow, removed 139 selfloop flow, removed 34 redundant places. [2021-11-07 07:53:42,886 INFO L242 Difference]: Finished difference. Result has 696 places, 635 transitions, 21215 flow [2021-11-07 07:53:42,887 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=20063, PETRI_DIFFERENCE_MINUEND_PLACES=654, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=21215, PETRI_PLACES=696, PETRI_TRANSITIONS=635} [2021-11-07 07:53:42,887 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 630 predicate places. [2021-11-07 07:53:42,887 INFO L470 AbstractCegarLoop]: Abstraction has has 696 places, 635 transitions, 21215 flow [2021-11-07 07:53:42,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.04545454545455) internal successors, (1189), 22 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:42,887 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:53:42,888 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:42,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:43,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:43,088 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:53:43,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:43,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1384217924, now seen corresponding path program 69 times [2021-11-07 07:53:43,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:43,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235699895] [2021-11-07 07:53:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:43,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:43,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:43,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235699895] [2021-11-07 07:53:43,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235699895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:43,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383289187] [2021-11-07 07:53:43,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:53:43,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:43,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:43,347 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:43,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-07 07:53:46,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 07:53:46,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:46,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 07:53:46,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:47,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383289187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:47,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:47,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-11-07 07:53:47,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715769800] [2021-11-07 07:53:47,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:53:47,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:47,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:53:47,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:53:47,222 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:53:47,223 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 696 places, 635 transitions, 21215 flow. Second operand has 22 states, 22 states have (on average 54.04545454545455) internal successors, (1189), 22 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:47,223 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:53:47,224 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:53:47,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:53:50,657 INFO L129 PetriNetUnfolder]: 530/4051 cut-off events. [2021-11-07 07:53:50,657 INFO L130 PetriNetUnfolder]: For 534964/535413 co-relation queries the response was YES. [2021-11-07 07:53:50,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33875 conditions, 4051 events. 530/4051 cut-off events. For 534964/535413 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 39053 event pairs, 0 based on Foata normal form. 153/3771 useless extension candidates. Maximal degree in co-relation 33559. Up to 715 conditions per place. [2021-11-07 07:53:50,801 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 183 selfloop transitions, 440 changer transitions 8/675 dead transitions. [2021-11-07 07:53:50,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 732 places, 675 transitions, 26010 flow [2021-11-07 07:53:50,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 07:53:50,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-11-07 07:53:50,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2221 transitions. [2021-11-07 07:53:50,803 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412878787878788 [2021-11-07 07:53:50,803 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2221 transitions. [2021-11-07 07:53:50,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2221 transitions. [2021-11-07 07:53:50,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:53:50,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2221 transitions. [2021-11-07 07:53:50,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.525) internal successors, (2221), 40 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:50,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:50,808 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:50,808 INFO L186 Difference]: Start difference. First operand has 696 places, 635 transitions, 21215 flow. Second operand 40 states and 2221 transitions. [2021-11-07 07:53:50,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 732 places, 675 transitions, 26010 flow [2021-11-07 07:53:53,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 697 places, 675 transitions, 24988 flow, removed 143 selfloop flow, removed 35 redundant places. [2021-11-07 07:53:53,882 INFO L242 Difference]: Finished difference. Result has 702 places, 639 transitions, 21569 flow [2021-11-07 07:53:53,883 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=20325, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=21569, PETRI_PLACES=702, PETRI_TRANSITIONS=639} [2021-11-07 07:53:53,883 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 636 predicate places. [2021-11-07 07:53:53,883 INFO L470 AbstractCegarLoop]: Abstraction has has 702 places, 639 transitions, 21569 flow [2021-11-07 07:53:53,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.04545454545455) internal successors, (1189), 22 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:53,884 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:53:53,884 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:53,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:54,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:54,086 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:53:54,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:54,087 INFO L85 PathProgramCache]: Analyzing trace with hash 672889818, now seen corresponding path program 70 times [2021-11-07 07:53:54,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:54,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851604113] [2021-11-07 07:53:54,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:54,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:54,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:54,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851604113] [2021-11-07 07:53:54,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851604113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:54,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174484440] [2021-11-07 07:53:54,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:53:54,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:54,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:54,406 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:54,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_539d4e98-b7a9-4f67-baab-40bd66ad393e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-07 07:53:57,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:53:57,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:57,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 07:53:57,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:58,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174484440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:58,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:58,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-07 07:53:58,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431902763] [2021-11-07 07:53:58,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:53:58,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:58,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:53:58,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:53:58,334 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:53:58,335 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 702 places, 639 transitions, 21569 flow. Second operand has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:58,335 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:53:58,335 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:53:58,335 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand